C22B1/00	7	Preliminary treatment of ores or scrap	C22B1/00	C22B1/00		1728
C22B1/005	8	{Preliminary treatment of scrap (C22B1/02 - C22B1/26 take precedence)}	C22B1/00	C22B1/00		2760
C22B1/02	8	Roasting processes (C22B1/16 takes precedence)	C22B1/02	C22B1/02		5167
C22B1/04	9	Blast roasting	C22B1/04	C22B1/04		117
C22B1/06	9	Sulfating roasting	C22B1/06	C22B1/06		587
C22B1/08	9	Chloridising roasting	C22B1/08	C22B1/08		1208
C22B1/10	9	in fluidised form	C22B1/10	C22B1/10		1176
C22B1/11	8	Removing sulfur, phosphorus or arsenic other than by roasting	C22B1/11	C22B1/11		409
C22B1/14	8	Agglomerating; Briquetting; Binding; Granulating	C22B1/14	C22B1/14		1074
C22B1/16	9	Sintering; Agglomerating	C22B1/16	C22B1/16		2494
C22B1/18	10	in sinter pots	C22B1/18	C22B1/18		50
C22B1/20	10	in sintering machines with movable grates	C22B1/20	C22B1/20		1184
C22B1/205	11	{regulation of the sintering process}	C22B1/20	C22B1/20		325
C22B1/212	10	in tunnel furnaces	C22B1/212	C22B1/212		34
C22B1/214	10	in shaft furnaces	C22B1/214	C22B1/214		100
C22B1/216	10	in rotary furnaces	C22B1/216	C22B1/216		327
C22B1/22	10	in other sintering apparatus	C22B1/22	C22B1/22		219
C22B1/24	9	Binding; Briquetting {; Granulating}	C22B1/24	C22B1/24		1420
C22B1/2406	10	{pelletizing}	C22B1/24	C22B1/24		3193
C22B1/2413	10	{enduration of pellets}	C22B1/24	C22B1/24		427
C22B1/242	10	with binders	C22B1/242	C22B1/242		724
C22B1/243	11	inorganic	C22B1/243	C22B1/243		1232
C22B1/244	11	organic	C22B1/244	C22B1/244		822
C22B1/245	12	with carbonaceous material for the production of coked agglomerates	C22B1/245	C22B1/245		496
C22B1/248	10	of metal scrap or alloys	C22B1/248	C22B1/248		1124
C22B1/26	8	Cooling of roasted, sintered, or agglomerated ores	C22B1/26	C22B1/26		467
C22B3/00	7	Extraction of metal compounds from ores or concentrates by wet processes<br><br><u>NOTE</u><br><br> When classifying in this group, the nature of any metal which is considered to represent information of interest for search may also be classified in the main groups only of C22B11/00 - C22B25/00, in group C22B19/34 or in any of groups C22B26/00 - C22B61/00. This can for example, be the case when it is considered of interest to enable searching for extraction of specific metals or their compounds. Such non-obligatory classification should be given as "additional information".<br>This group covers methods directed to the extraction of three or more metals. For the recovery of one or two metals, see the other groups of this subclass concerning these metals	C22B3/00	C22B3/00		432
C22B3/02	8	Apparatus therefor	C22B3/02	C22B3/02		2302
C22B3/04	8	by leaching (C22B3/18 takes precedence)	C22B3/04	C22B3/04		1610
C22B3/045	9	{Leaching using electrochemical processes}	C22B3/04	C22B3/04		311
C22B3/06	9	in inorganic acid solutions {, e.g. with acids generated in situ; in inorganic salt solutions other than ammonium salt solutions}	C22B3/06	C22B3/06		1202
C22B3/065	10	{Nitric acids or salts thereof}	C22B3/06	C22B3/06		474
C22B3/08	10	Sulfuric acid {, other sulfurated acids or salts thereof}	C22B3/08	C22B3/08		2591
C22B3/10	10	Hydrochloric acid {, other halogenated acids or salts thereof}	C22B3/10	C22B3/10		1334
C22B3/12	9	in inorganic alkaline solutions	C22B3/12	C22B3/12		799
C22B3/14	10	containing ammonia or ammonium salts	C22B3/14	C22B3/14		432
C22B3/16	9	in organic solutions	C22B3/16	C22B3/16		229
C22B3/1608	10	{Leaching with acyclic or carbocyclic agents}	C22B3/16	C22B3/16		31
C22B3/1616	11	{Leaching with acyclic or carbocyclic agents of a single type}	C22B3/16	C22B3/16		67
C22B3/1625	12	{with amines (amino acids C22B3/165)}	C22B3/16	C22B3/16		58
C22B3/1633	12	{with oximes}	C22B3/16	C22B3/16		9
C22B3/1641	12	{with ketones or aldehydes}	C22B3/16	C22B3/16		25
C22B3/165	12	{with organic acids}	C22B3/16	C22B3/16		402
C22B3/1658	11	{Leaching with acyclic or carbocyclic agents of different types in admixture, e.g. with organic acids added to oximes}	C22B3/16	C22B3/16		77
C22B3/1666	10	{Leaching with heterocyclic compounds}	C22B3/16	C22B3/16		35
C22B3/1675	11	{Leaching with a mixture of organic agents wherein one agent at least is a heterocyclic compounds (C22B3/1683 takes precedence)}	C22B3/16	C22B3/16		21
C22B3/1683	10	{Leaching with organo-metallic compounds}	C22B3/16	C22B3/16		36
C22B3/1691	11	{Leaching with a mixture of organic agents wherein at least one agent is an organo-metallic compound}	C22B3/16	C22B3/16		15
C22B3/18	8	with the aid of microorganisms or enzymes, e.g. bacteria or algae	C22B3/18	C22B3/18		1130
C22B3/20	8	Treatment or purification of solutions, e.g. obtained by leaching (C22B3/18 takes precedence)	C22B3/20	C22B3/20		505
C22B3/205	9	{using adducts or inclusion complexes}	C22B3/20	C22B3/20		123
C22B3/22	9	by physical processes, e.g. by filtration, by magnetic means {, or by thermal decomposition}(treatment or purification of solutions by liquid-liquid extraction C22B3/26)	C22B3/22	C22B3/22		1940
C22B3/24	10	by adsorption on solid substances, e.g. by extraction with solid resins	C22B3/24	C22B3/24		1890
C22B3/26	9	by liquid-liquid extraction using organic compounds<br><br><u>NOTE</u><br><br>In groups C22B3/262 - C22B3/41:<br>the last place priority rule is applied, i.e. at each hierarchical level, in the absence of an indication to the contrary, compounds are classified in the last appropriate place;<br>when two or more compounds are used successively, each compound is classified as such;<br>mixtures containing two or more compounds covered individually by the same one of groups C22B3/262 - C22B3/387, are classified only in that group.	C22B3/26	C22B3/26		1098
C22B3/262	10	{using alcohols or phenols}	C22B3/26	C22B3/26		205
C22B3/28	10	Amines	C22B3/28	C22B3/28		267
C22B3/282	11	{Aliphatic amines}	C22B3/28	C22B3/28		259
C22B3/284	11	{Aromatic amines}	C22B3/28	C22B3/28		20
C22B3/286	11	{Amino-alcohols}	C22B3/28	C22B3/28		22
C22B3/288	11	{Quaternary ammonium}	C22B3/28	C22B3/28		140
C22B3/30	10	Oximes	C22B3/30	C22B3/30		427
C22B3/302	10	{Ethers or epoxides}	C22B3/26	C22B3/30		79
C22B3/304	11	{Crown ethers}	C22B3/26	C22B3/30		48
C22B3/306	10	{Ketones or aldehydes}	C22B3/26	C22B3/30		210
C22B3/32	10	Carboxylic acids	C22B3/32	C22B3/32		377
C22B3/322	11	{Oxalic acids}	C22B3/32	C22B3/32		58
C22B3/324	11	{Naphthenic acids}	C22B3/32	C22B3/32		59
C22B3/326	11	{Ramified chain carboxylic acids or derivatives thereof, e.g. "versatic" acids}	C22B3/32	C22B3/32		73
C22B3/33	10	{Cyanic acids, derivatives thereof}	C22B3/26	C22B3/33		34
C22B3/34	10	containing sulfur {, e.g. sulfonium}	C22B3/34	C22B3/34		179
C22B3/36	10	Heterocyclic compounds (C22B3/34 takes precedence)	C22B3/36	C22B3/36		49
C22B3/362	11	{Heterocyclic compounds of a single type}	C22B3/36	C22B3/36		145
C22B3/364	12	{Quinoline}	C22B3/36	C22B3/36		117
C22B3/37	10	{containing boron, silicon, selenium or tellurium}	C22B3/26	C22B3/37		64
C22B3/38	10	containing phosphorus	C22B3/38	C22B3/38		149
C22B3/381	11	{Phosphines, e.g. compounds with the formula PRnH3-n, with n = 0-3}	C22B3/38	C22B3/38		43
C22B3/382	11	{Phosphine chalcogenides, e.g. compounds of the formula R3P=X with X = O, S, Se or Te}	C22B3/38	C22B3/38		101
C22B3/383	11	{Tervalent phosphorus oxyacids, esters thereof}	C22B3/38	C22B3/38		29
C22B3/384	11	{Pentavalent phosphorus oxyacids, esters thereof}	C22B3/38	C22B3/38		92
C22B3/3842	12	{Phosphinic acid, e.g. H2P(O)(OH)}	C22B3/38	C22B3/38		317
C22B3/3844	12	{Phosphonic acid, e.g. H2P(O)(OH)2}	C22B3/38	C22B3/38		472
C22B3/3846	12	{Phosphoric acid, e.g. (O)P(OH)3}	C22B3/38	C22B3/38		928
C22B3/385	11	{Thiophosphoric acids, or esters thereof}	C22B3/38	C22B3/38		71
C22B3/386	11	{Polyphosphoric oxyacids, or derivatives thereof}	C22B3/38	C22B3/38		60
C22B3/387	11	{Cyclic or polycyclic compounds}	C22B3/38	C22B3/38		77
C22B3/40	10	Mixtures	C22B3/40	C22B3/40		89
C22B3/402	11	{of acyclic or carbocyclic compounds of different types}	C22B3/40	C22B3/40		299
C22B3/404	12	{of organic acids and oximes}	C22B3/40	C22B3/40		37
C22B3/406	11	{at least one compound thereof being a heterocyclic compound}	C22B3/40	C22B3/40		81
C22B3/408	11	{using a mixture of phosphorus-based acid derivatives of different types}	C22B3/40	C22B3/40		165
C22B3/409	11	{at least one compound being an organo-metallic compound}	C22B3/40	C22B3/40		227
C22B3/41	10	{using a solution of normally solid organic compounds, e.g. dissolved polymers, sugars, or the like}	C22B3/26	C22B3/41		76
C22B3/42	9	by ion-exchange extraction	C22B3/42	C22B3/42		1830
C22B3/44	9	by chemical processes (treatment or purification of solutions by liquid-liquid extraction C22B3/26, by ion-exchange extraction C22B3/42)	C22B3/44	C22B3/44		3884
C22B3/46	10	by substitution, e.g. by cementation	C22B3/46	C22B3/46		721
C22B4/00	7	Electrothermal treatment of ores or metallurgical products for obtaining metals or alloys (obtaining iron or steel C21B, C21C)	C22B4/00	C22B4/00		891
C22B4/005	8	{using plasma jets (smelting, remelting, refining of metals using a plasma as heat source C22B9/22; generating or handling plasma in general H05H1/00; gas-filled discharge tubes for processing materials in general H01J37/32)}	C22B4/00	C22B4/00		299
C22B4/02	8	Light metals {(C22B4/005 takes precedence)}	C22B4/02	C22B4/02		100
C22B4/04	8	Heavy metals {(C22B4/005 takes precedence)}	C22B4/04	C22B4/04		398
C22B4/06	8	Alloys {(C22B4/005 takes precedence)}	C22B4/06	C22B4/06		470
C22B4/08	8	Apparatus ({C22B4/005 takes precedence; } electric heating elements H05B)	C22B4/08	C22B4/08		627
C22B5/00	7	General methods of reducing to metals	C22B5/00	C22B5/00		843
C22B5/02	8	Dry methods {smelting of sulfides or formation of mattes}	C22B5/02	C22B5/02		539
C22B5/04	9	by aluminium, other metals or silicon	C22B5/04	C22B5/04		2002
C22B5/06	9	by carbides or the like	C22B5/06	C22B5/06		675
C22B5/08	9	by sulfides; Roasting reaction methods	C22B5/08	C22B5/08		89
C22B5/10	9	by solid carbonaceous reducing agents	C22B5/10	C22B5/10		1703
C22B5/12	9	by gases	C22B5/12	C22B5/12		954
C22B5/14	10	fluidised material	C22B5/14	C22B5/14		283
C22B5/16	9	with volatilisation or condensation of the metal being produced	C22B5/16	C22B5/16		876
C22B5/18	9	Reducing step-by-step	C22B5/18	C22B5/18		110
C22B5/20	9	from metal carbonyls	C22B5/20	C22B5/20		205
C22B7/00	7	Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; {Methods of a general interest or applied to the winning of more than two metals (briquetting of scrap C22B1/248; preliminary treatment of scrap C22B1/005)}	C22B7/00	C22B7/00		1539
C22B7/001	8	{Dry processes}	C22B7/00	C22B7/00		4191
C22B7/002	9	{by treating with halogens, sulfur or compounds thereof; by carburising, by treating with hydrogen (hydriding)}	C22B7/00	C22B7/00		510
C22B7/003	9	{only remelting, e.g. of chips, borings, turnings; apparatus used therefor}	C22B7/00	C22B7/00		820
C22B7/004	9	{separating two or more metals by melting out (liquation), i.e. heating above the temperature of the lower melting metal component(s); by fractional crystallisation (controlled freezing)}	C22B7/00	C22B7/00		451
C22B7/005	8	{Separation by a physical processing technique only, e.g. by mechanical breaking}	C22B7/00	C22B7/00		1630
C22B7/006	8	{Wet processes}	C22B7/00	C22B7/00		5692
C22B7/007	9	{by acid leaching}	C22B7/00	C22B7/00		5315
C22B7/008	9	{by an alkaline or ammoniacal leaching}	C22B7/00	C22B7/00		1465
C22B7/009	8	{General processes for recovering metals or metallic compounds from spent catalysts (for recovering specific metals C22B11/00&#160;-&#160;C22B61/00)}	C22B7/00	C22B7/00		609
C22B7/02	8	Working-up flue dust	C22B7/02	C22B7/02		2686
C22B7/04	8	Working-up slag	C22B7/04	C22B7/04		3585
C22B9/00	7	General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals	C22B9/00	C22B9/00		435
C22B9/003	8	{by induction}	C22B9/00	C22B9/00		347
C22B9/006	8	{with use of an inert protective material including the use of an inert gas}	C22B9/00	C22B9/00		615
C22B9/02	8	Refining by liquating, filtering, centrifuging, distilling, or supersonic wave action {including acoustic waves; (C22B9/003, C22B9/006, C22B9/05, C22B9/22 take precedence)}	C22B9/02	C22B9/02		1453
C22B9/023	9	{By filtering (filtration of aluminium C22B21/066)}	C22B9/02	C22B9/02		568
C22B9/026	9	{by acoustic waves, e.g. supersonic waves}	C22B9/02	C22B9/02		151
C22B9/04	8	Refining by applying a vacuum	C22B9/04	C22B9/04		1555
C22B9/05	8	Refining by treating with gases, e.g. gas flushing {also refining by means of a material generating gas in situ}	C22B9/05	C22B9/05		1529
C22B9/055	9	{while the metal is circulating, e.g. combined with filtration}	C22B9/05	C22B9/05		235
C22B9/10	8	with refining or fluxing agents; Use of materials therefor, {e.g. slagging or scorifying agents}(C22B9/18 takes precedence){(C22B9/006 takes precedence)}	C22B9/10	C22B9/10		1415
C22B9/103	9	{Methods of introduction of solid or liquid refining or fluxing agents}	C22B9/10	C22B9/10		485
C22B9/106	9	{the refining being obtained by intimately mixing the molten metal with a molten salt or slag}	C22B9/10	C22B9/10		154
C22B9/14	8	Refining in the solid state	C22B9/14	C22B9/14		139
C22B9/16	8	Remelting metals (liquating C22B9/02)	C22B9/16	C22B9/16		522
C22B9/18	9	Electroslag remelting {(electroslag casting B22D23/10)}	C22B9/18	C22B9/18		2328
C22B9/20	9	Arc remelting	C22B9/20	C22B9/20		953
C22B9/22	9	with heating by wave energy or particle radiation {(by acoustic waves C22B9/026)}	C22B9/22	C22B9/22		83
C22B9/221	10	{by electromagnetic waves, e.g. by gas discharge lamps}	C22B9/22	C22B9/22		26
C22B9/223	11	{by laser beams (working by laser beam B23K26/00)}	C22B9/22	C22B9/22		40
C22B9/225	11	{by microwaves}	C22B9/22	C22B9/22		41
C22B9/226	10	{by electric discharge, e.g. plasma (C22B9/20 takes precedence; apparatus therefor H01J, H05B, H05H; chemical reactions with metals in a plasma C22B4/005)}	C22B9/22	C22B9/22		288
C22B9/228	10	{by particle radiation, e.g. electron beams}	C22B9/22	C22B9/22		646
C22B11/00	7	Obtaining noble metals	C22B11/00	C22B11/00		728
C22B11/02	8	by dry processes	C22B11/02	C22B11/02		523
C22B11/021	9	{Recovery of noble metals from waste materials}	C22B11/02	C22B11/02		373
C22B11/023	10	{from pyrometallurgical residues, e.g. from ashes, dross, flue dust, mud, skim, slag, sludge}	C22B11/02	C22B11/02		253
C22B11/025	10	{from manufactured products, e.g. from printed circuit boards, from photographic films, paper, or baths}	C22B11/02	C22B11/02		228
C22B11/026	10	{from spent catalysts}	C22B11/02	C22B11/02		264
C22B11/028	11	{using solid sorbents, e.g. getters or catchment gauzes}	C22B11/02	C22B11/02		103
C22B11/04	8	{by wet processes (extraction of metal compounds by leaching in organic solutions C22B3/16; treatment or purification of solutions by liquid-liquid extraction C22B3/26)}	C22B11/00	C22B11/04		2437
C22B11/042	9	{Recovery of noble metals from waste materials}	C22B11/00	C22B11/04		934
C22B11/044	10	{from pyrometallurgical residues, e.g. from ashes, dross, flue dust, mud, skim, slag, sludge}	C22B11/00	C22B11/04		344
C22B11/046	10	{from manufactured products, e.g. from printed circuit boards, from photographic films, paper or baths}	C22B11/00	C22B11/04		840
C22B11/048	10	{from spent catalysts}	C22B11/00	C22B11/04		583
C22B11/06	8	Chloridising	C22B11/06	C22B11/06		379
C22B11/08	8	by cyaniding	C22B11/08	C22B11/08		1038
C22B11/10	8	by amalgamating	C22B11/10	C22B11/10		1306
C22B11/12	9	Apparatus therefor	C22B11/12	C22B11/12		82
C22B13/00	7	Obtaining lead	C22B13/00	C22B13/00		363
C22B13/02	8	by dry processes	C22B13/02	C22B13/02		718
C22B13/025	9	{Recovery from waste materials}	C22B13/02	C22B13/02		884
C22B13/04	8	{by wet processes}	C22B3/00	C22B13/04		445
C22B13/045	9	{Recovery from waste materials}	C22B3/00	C22B13/04		854
C22B13/06	8	Refining	C22B13/06	C22B13/06		647
C22B13/08	9	Separating metals from lead by precipitating, e.g. Parkes process	C22B13/08	C22B13/08		78
C22B13/10	9	Separating metals from lead by crystallising, e.g. by Pattison process	C22B13/10	C22B13/10		24
C22B15/00	7	Obtaining copper	C22B15/00	C22B15/00		585
C22B15/0002	8	{Preliminary treatment}	C22B15/00	C22B15/00		84
C22B15/0004	9	{without modification of the copper constituent}	C22B15/00	C22B15/00		110
C22B15/0006	10	{by dry processes}	C22B15/00	C22B15/00		229
C22B15/0008	10	{by wet processes (by flotation B03D)}	C22B15/00	C22B15/00		158
C22B15/001	9	{with modification of the copper constituent}	C22B15/00	C22B15/00		54
C22B15/0013	10	{by roasting}	C22B15/00	C22B15/00		88
C22B15/0015	11	{Oxidizing roasting}	C22B15/00	C22B15/00		108
C22B15/0017	11	{Sulfating or sulfiding roasting}	C22B15/00	C22B15/00		82
C22B15/0019	11	{Chloridizing roasting (segregation C22B15/0023)}	C22B15/00	C22B15/00		36
C22B15/0021	10	{by reducing in gaseous or solid state (slag reduction C22B15/0054)}	C22B15/00	C22B15/00		88
C22B15/0023	11	{Segregation}	C22B15/00	C22B15/00		24
C22B15/0026	8	{Pyrometallurgy}	C22B15/00	C22B15/00		118
C22B15/0028	9	{Smelting or converting}	C22B15/00	C22B15/00		324
C22B15/003	10	{Bath smelting or converting}	C22B15/00	C22B15/00		258
C22B15/0032	11	{in shaft furnaces, e.g. blast furnaces}	C22B15/02	C22B15/00		110
C22B15/0034	11	{in rotary furnaces, e.g. kaldo-type furnaces}	C22B15/00	C22B15/00		34
C22B15/0036	11	{in reverberatory furnaces}	C22B15/04	C22B15/00		126
C22B15/0039	11	{in electric furnaces}	C22B15/00	C22B15/00		110
C22B15/0041	11	{in converters}	C22B15/06	C22B15/00		245
C22B15/0043	12	{in rotating converters}	C22B15/06	C22B15/00		72
C22B15/0045	11	{in muffles, crucibles, or closed vessels}	C22B15/00	C22B15/00		33
C22B15/0047	10	{flash smelting or converting}	C22B15/00	C22B15/00		175
C22B15/005	10	{in a succession of furnaces}	C22B15/00	C22B15/00		148
C22B15/0052	10	{Reduction smelting or converting}	C22B15/00	C22B15/00		395
C22B15/0054	9	{Slag, slime, speiss, or dross treating}	C22B15/00	C22B15/00		405
C22B15/0056	9	{Scrap treating}	C22B15/00	C22B15/00		424
C22B15/0058	10	{Spent catalysts}	C22B15/00	C22B15/00		22
C22B15/006	9	{working up of molten copper, e.g. refining}	C22B15/00	C22B15/00		947
C22B15/0063	8	{Hydrometallurgy}	C22B15/00	C22B15/00		679
C22B15/0065	9	{Leaching or slurrying (with organic compounds C22B3/16)}	C22B15/00	C22B15/00		343
C22B15/0067	10	{with acids or salts thereof}	C22B15/00	C22B15/00		397
C22B15/0069	11	{containing halogen}	C22B15/00	C22B15/00		438
C22B15/0071	11	{containing sulfur}	C22B15/00	C22B15/00		1380
C22B15/0073	11	{containing nitrogen}	C22B15/00	C22B15/00		119
C22B15/0076	12	{Cyanide groups}	C22B15/00	C22B15/00		28
C22B15/0078	10	{with ammoniacal solutions, e.g. ammonium hydroxide}	C22B15/00	C22B15/00		209
C22B15/008	10	{with non-acid solutions containing salts of alkali or alkaline earth metals}	C22B15/00	C22B15/00		71
C22B15/0082	10	{with water}	C22B15/00	C22B15/00		86
C22B15/0084	9	{Treating solutions (with organic compounds C22B3/20)}	C22B15/00	C22B15/00		252
C22B15/0086	10	{by physical methods}	C22B15/00	C22B15/00		341
C22B15/0089	10	{by chemical methods}	C22B15/00	C22B15/00		983
C22B15/0091	11	{by cementation}	C22B15/00	C22B15/00		480
C22B15/0093	11	{by gases, e.g. hydrogen or hydrogen sulfide}	C22B15/00	C22B15/00		207
C22B15/0095	8	{Process control or regulation methods}	C22B15/00	C22B15/00		114
C22B15/0097	9	{Sulfur release abatement}	C22B15/00	C22B15/00		45
C22B17/00	7	Obtaining cadmium	C22B17/00	C22B17/00		39
C22B17/02	8	by dry processes	C22B17/02	C22B17/02		109
C22B17/04	8	{by wet processes}	C22B3/00	C22B17/04		332
C22B17/06	8	Refining	C22B17/06	C22B17/06		53
C22B19/00	7	Obtaining zinc or zinc oxide	C22B19/00	C22B19/00		492
C22B19/02	8	Preliminary treatment of ores; Preliminary refining of zinc oxide	C22B19/02	C22B19/02		376
C22B19/04	8	Obtaining zinc by distilling	C22B19/04	C22B19/04		866
C22B19/06	9	in muffle furnaces	C22B19/06	C22B19/06		183
C22B19/08	9	in blast furnaces	C22B19/08	C22B19/08		62
C22B19/10	9	in reverberatory furnaces	C22B19/10	C22B19/10		19
C22B19/12	9	in crucible furnaces	C22B19/12	C22B19/12		28
C22B19/14	9	in vertical retorts	C22B19/14	C22B19/14		159
C22B19/16	9	Distilling vessels	C22B19/16	C22B19/16		152
C22B19/18	10	Condensers, Receiving vessels	C22B19/18	C22B19/18		473
C22B19/20	8	Obtaining zinc otherwise than by distilling	C22B19/20	C22B19/20		685
C22B19/22	9	{with leaching with acids}	C22B3/00	C22B19/22		1197
C22B19/24	9	{with leaching with alkaline solutions, e.g. ammonia}	C22B3/00	C22B19/24		249
C22B19/26	9	{Refining solutions containing zinc values, e.g. obtained by leaching zinc ores (treatment or purification of solutions by liquid-liquid extraction, by ion exchange or by adsorption C22B3/00)}	C22B3/00	C22B19/26		839
C22B19/28	8	from muffle furnace residues	C22B19/28	C22B19/28		98
C22B19/30	8	from metallic residues or scraps	C22B19/30	C22B19/30		1755
C22B19/32	8	Refining zinc	C22B19/32	C22B19/32		230
C22B19/34	8	Obtaining zinc oxide (purifying zinc oxide C01G9/02)	C22B19/34	C22B19/34		554
C22B19/36	9	in blast or reverberatory furnaces	C22B19/36	C22B19/36		205
C22B19/38	9	in rotary furnaces	C22B19/38	C22B19/38		135
C22B21/00	7	Obtaining aluminium	C22B21/00	C22B21/00		242
C22B21/0007	8	{Preliminary treatment of ores or scrap or any other metal source (Bayer processes C01F)}	C22B21/00	C22B21/00		665
C22B21/0015	8	{by wet processes (C22B21/02, C22B21/04 and C22B21/06 take precedence)}	C22B21/00	C22B21/00		328
C22B21/0023	9	{from waste materials}	C22B21/00	C22B21/00		739
C22B21/003	10	{from spent catalysts}	C22B21/00	C22B21/00		85
C22B21/0038	8	{by other processes (electrolysis C25C; C22B21/02 and C22B21/04 take precedence)}	C22B21/00	C22B21/00		43
C22B21/0046	9	{from aluminium halides}	C22B21/00	C22B21/00		197
C22B21/0053	9	{from other aluminium compounds}	C22B21/00	C22B21/00		95
C22B21/0061	10	{using metals, e.g. Hg or Mn}	C22B21/00	C22B21/00		168
C22B21/0069	9	{from scrap, skimmings or any secondary source aluminium, e.g. recovery of alloy constituents (C22B21/0046, C22B21/0053 and C22B21/0092 take precedence)}	C22B21/00	C22B21/00		783
C22B21/0076	10	{from spent catalysts}	C22B21/00	C22B21/00		9
C22B21/0084	8	{melting and handling molten aluminium (C22B21/02, C22B21/04 and C22B21/06 take precedence)}	C22B21/00	C22B21/00		325
C22B21/0092	9	{Remelting scrap, skimmings or any secondary source aluminium}	C22B21/00	C22B21/00		637
C22B21/02	8	with reducing {(C22B21/04 takes precedence)}	C22B21/02	C22B21/02		331
C22B21/04	8	with alkali metals {earth alkali metals included}	C22B21/04	C22B21/04		62
C22B21/06	8	refining {(electrolytic refining C25C; C22B21/0046, C22B21/0061 take precedence)}	C22B21/06	C22B21/06		554
C22B21/062	9	{using salt or fluxing agents (C22B21/064, C22B21/066, and C22B21/068 take precedence)}	C22B21/06	C22B21/06		341
C22B21/064	9	{using inert or reactive gases (C22B21/066 and C22B21/068 take precedence)}	C22B21/06	C22B21/06		621
C22B21/066	9	{Treatment of circulating aluminium, e.g. by filtration (C22B21/068 takes precedence)}	C22B21/06	C22B21/06		535
C22B21/068	9	{handling in vacuum}	C22B21/06	C22B21/06		122
C22B23/00	7	Obtaining nickel or cobalt	C22B23/00	C22B23/00		537
C22B23/005	8	{Preliminary treatment of ores, e.g. by roasting or by the Krupp-Renn process}	C22B23/00	C22B23/00		627
C22B23/02	8	by dry processes	C22B23/02	C22B23/02		713
C22B23/021	9	{by reduction in solid state, e.g. by segregation processes}	C22B23/02	C22B23/02		360
C22B23/023	9	{with formation of ferro-nickel or ferro-cobalt}	C22B23/02	C22B23/02		375
C22B23/025	9	{with formation of a matte or by matte refining or converting into nickel or cobalt, e.g. by the Oxford process (leaching of mattes C22B23/04)}	C22B23/02	C22B23/02		376
C22B23/026	9	{from spent catalysts}	C22B23/02	C22B23/02		111
C22B23/028	9	{separation of nickel from cobalt}	C22B23/02	C22B23/02		20
C22B23/04	8	{by wet processes (recovery or separation of nickel or cobalt using organic agents C22B3/00)}	C22B3/00	C22B23/04		287
C22B23/0407	9	{Leaching processes}	C22B3/00	C22B23/04		548
C22B23/0415	10	{with acids or salt solutions except ammonium salts solutions}	C22B3/00	C22B23/04		699
C22B23/0423	11	{Halogenated acids or salts thereof}	C22B3/00	C22B23/04		463
C22B23/043	11	{Sulfurated acids or salts thereof}	C22B3/00	C22B23/04		1698
C22B23/0438	11	{Nitric acids or salts thereof}	C22B3/00	C22B23/04		162
C22B23/0446	10	{with an ammoniacal liquor or with a hydroxide of an alkali or alkaline-earth metal}	C22B3/00	C22B23/04		378
C22B23/0453	9	{Treatment or purification of solutions, e.g. obtained by leaching (C22B23/0407 takes precedence)}	C22B3/00	C22B23/04		843
C22B23/0461	10	{by chemical methods}	C22B3/00	C22B23/04		1645
C22B23/0469	11	{by chemical substitution, e.g. by cementation}	C22B3/00	C22B23/04		209
C22B23/0476	9	{Separation of nickel from cobalt}	C22B3/00	C22B23/04		106
C22B23/0484	10	{in acidic type solutions}	C22B3/00	C22B23/04		176
C22B23/0492	10	{in ammoniacal type solutions}	C22B3/00	C22B23/04		48
C22B23/06	8	Refining	C22B23/06	C22B23/06		209
C22B23/065	9	{carbonyl methods}	C22B23/06	C22B23/06		109
C22B25/00	7	Obtaining tin	C22B25/00	C22B25/00		303
C22B25/02	8	by dry processes	C22B25/02	C22B25/02		545
C22B25/04	8	{by wet processes}	C22B3/00	C22B25/04		375
C22B25/06	8	from scrap, especially tin scrap (by electrolytic procedure C25C1/14)	C22B25/06	C22B25/06		1030
C22B25/08	8	Refining	C22B25/08	C22B25/08		170
C22B26/00	7	Obtaining alkali, alkaline earth metals or magnesium	C22B26/00	C22B26/00		111
C22B26/10	8	Obtaining alkali metals	C22B26/10	C22B26/10		976
C22B26/12	9	Obtaining lithium	C22B26/12	C22B26/12		4428
C22B26/20	8	Obtaining alkaline earth metals or magnesium	C22B26/20	C22B26/20		649
C22B26/22	9	Obtaining magnesium	C22B26/22	C22B26/22		2267
C22B30/00	7	Obtaining antimony, arsenic or bismuth	C22B30/00	C22B30/00		54
C22B30/02	8	Obtaining antimony	C22B30/02	C22B30/02		781
C22B30/04	8	Obtaining arsenic {(extraction of metal compounds by leaching in organic solutions C22B3/16; treatment or purification of solutions by adsorption on solids C22B3/24, by liquid-liquid extraction C22B3/26, by ion-exchange extraction C22B3/42)}	C22B30/04	C22B30/04		868
C22B30/06	8	Obtaining bismuth	C22B30/06	C22B30/06		456
C22B34/00	7	Obtaining refractory metals	C22B34/00	C22B34/00		277
C22B34/10	8	Obtaining titanium, zirconium or hafnium	C22B34/10	C22B34/10		99
C22B34/12	9	Obtaining titanium {or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds seeC01G23/00&#160;-&#160;C01G23/08}	C22B34/12	C22B34/12		340
C22B34/1204	10	{preliminary treatment of ores or scrap to eliminate non- titanium constituents, e.g. iron, without attacking the titanium constituent}	C22B34/12	C22B34/12		194
C22B34/1209	11	{by dry processes, e.g. with selective chlorination of iron or with formation of a titanium bearing slag}	C22B34/12	C22B34/12		512
C22B34/1213	11	{by wet processes, e.g. using leaching methods or flotation techniques}	C22B34/12	C22B34/12		224
C22B34/1218	10	{obtaining titanium or titanium compounds from ores or scrap by dry processes}	C22B34/12	C22B34/12		305
C22B34/1222	11	{using a halogen containing agent}	C22B34/12	C22B34/12		452
C22B34/1227	11	{using an oxygen containing agent}	C22B34/12	C22B34/12		68
C22B34/1231	11	{treatment or purification of titanium containing products obtained by dry processes, e.g. condensation}	C22B34/12	C22B34/12		139
C22B34/1236	10	{obtaining titanium or titanium compounds from ores or scrap by wet processes, e.g. by leaching}	C22B34/12	C22B34/12		85
C22B34/124	11	{using acidic solutions or liquors}	C22B34/12	C22B34/12		145
C22B34/1245	12	{containing a halogen ion as active agent}	C22B34/12	C22B34/12		212
C22B34/125	12	{containing a sulfur ion as active agent}	C22B34/12	C22B34/12		383
C22B34/1254	11	{using basic solutions or liquors}	C22B34/12	C22B34/12		70
C22B34/1259	11	{treatment or purification of titanium containing solutions or liquors or slurries (C01G23/001 takes precedence)}	C22B34/12	C22B34/12		368
C22B34/1263	10	{obtaining metallic titanium from titanium compounds, e.g. by reduction (C22B34/129 takes precedence)}	C22B34/12	C22B34/12		71
C22B34/1268	11	{using alkali or alkaline-earth metals or amalgams}	C22B34/12	C22B34/12		116
C22B34/1272	12	{reduction of titanium halides, e.g. Kroll process}	C22B34/12	C22B34/12		646
C22B34/1277	11	{using other metals, e.g. Al, Si, Mn}	C22B34/12	C22B34/12		156
C22B34/1281	11	{using carbon containing agents, e.g. C, CO, carbides (C22B34/1286 takes precedence)}	C22B34/12	C22B34/12		70
C22B34/1286	11	{using hydrogen containing agents, e.g. H2, CaH2, hydrocarbons}	C22B34/12	C22B34/12		55
C22B34/129	10	{obtaining metallic titanium from titanium compounds by dissociation, e.g. thermic dissociation of titanium tetraiodide, or by electrolysis or with the use of an electric arc}	C22B34/12	C22B34/12		192
C22B34/1295	10	{Refining, melting, remelting, working up of titanium}	C22B34/12	C22B34/12		552
C22B34/14	9	Obtaining zirconium or hafnium {(treatment or purification of solutions by liquid-liquid extraction, by ion exchange or by adsorption C22B3/00, C01G25/003, C01G27/003)}	C22B34/14	C22B34/14		666
C22B34/20	8	Obtaining niobium, tantalum or vanadium	C22B34/20	C22B34/20		53
C22B34/22	9	Obtaining vanadium	C22B34/22	C22B34/22		2132
C22B34/225	10	{from spent catalysts}	C22B34/22	C22B34/22		340
C22B34/24	9	Obtaining niobium or tantalum	C22B34/24	C22B34/24		798
C22B34/30	8	Obtaining chromium, molybdenum or tungsten	C22B34/30	C22B34/30		86
C22B34/32	9	Obtaining chromium	C22B34/32	C22B34/32		1123
C22B34/325	10	{from spent catalysts}	C22B34/32	C22B34/32		16
C22B34/34	9	Obtaining molybdenum {(treatment or purification of solutions by adsorption on solids C22B3/24, by liquid-liquid extraction C22B3/26, by ion-exchange extraction C22B3/42; preparation of molybdenum involving liquid-liquid extraction, adsorption or ion-exchange C01G39/003)}	C22B34/34	C22B34/34		957
C22B34/345	10	{from spent catalysts}	C22B34/34	C22B34/34		261
C22B34/36	9	Obtaining tungsten	C22B34/36	C22B34/36		911
C22B34/365	10	{from spent catalysts}	C22B34/36	C22B34/36		184
C22B35/00	7	Obtaining beryllium	C22B35/00	C22B35/00		295
C22B41/00	7	Obtaining germanium {(treatment or purification of solutions by adsorption on solids C22B3/24, by liquid-liquid extraction C22B3/26, by ion-exchange extraction C22B3/42)}	C22B41/00	C22B41/00		597
C22B43/00	7	Obtaining mercury	C22B43/00	C22B43/00		737
C22B47/00	7	Obtaining manganese	C22B47/00	C22B47/00		2174
C22B47/0009	8	{from spent catalysts}	C22B47/00	C22B47/00		27
C22B47/0018	8	{Treating ocean floor nodules}	C22B47/00	C22B47/00		11
C22B47/0027	9	{Preliminary treatment}	C22B47/00	C22B47/00		52
C22B47/0036	9	{by dry processes, e.g. smelting}	C22B47/00	C22B47/00		42
C22B47/0045	9	{by wet processes}	C22B47/00	C22B47/00		11
C22B47/0054	10	{leaching processes}	C22B47/00	C22B47/00		33
C22B47/0063	11	{with acids or salt solutions (C22B47/0072 takes precedence)}	C22B47/00	C22B47/00		175
C22B47/0072	11	{with an ammoniacal liquor or with a hydroxide of an alkali or alkaline-earth metal}	C22B47/00	C22B47/00		48
C22B47/0081	10	{Treatment or purification of solutions, e.g. obtained by leaching (C22B47/0054 takes precedence)}	C22B47/00	C22B47/00		116
C22B47/009	9	{refining, e.g. separation of metals obtained by the above methods}	C22B47/00	C22B47/00		23
C22B58/00	7	Obtaining gallium or indium {(treatment or purification of solutions by liquid-liquid extraction, by ion-exchange or by adsorption C22B3/20)}	C22B58/00	C22B58/00		1186
C22B59/00	7	Obtaining rare earth metals	C22B59/00	C22B59/00		3789
C22B60/00	7	Obtaining metals of atomic number 87 or higher, i.e. radioactive metals	C22B60/00	C22B60/00		122
C22B60/02	8	Obtaining thorium, uranium, or other actinides	C22B60/02	C22B60/02		166
C22B60/0204	9	{obtaining uranium}	C22B60/02	C22B60/02		65
C22B60/0208	10	{preliminary treatment of ores or scrap}	C22B60/02	C22B60/02		161
C22B60/0213	10	{by dry processes}	C22B60/02	C22B60/02		343
C22B60/0217	10	{by wet processes}	C22B60/02	C22B60/02		43
C22B60/0221	11	{by leaching}	C22B60/02	C22B60/02		104
C22B60/0226	12	{using acidic solutions or liquors}	C22B60/02	C22B60/02		132
C22B60/023	13	{halogenated ion as active agent}	C22B60/02	C22B60/02		69
C22B60/0234	13	{sulfurated ion as active agent}	C22B60/02	C22B60/02		222
C22B60/0239	13	{nitric acid containing ion as active agent}	C22B60/02	C22B60/02		109
C22B60/0243	13	{phosphorated ion as active agent}	C22B60/02	C22B60/02		24
C22B60/0247	12	{using basic solutions or liquors}	C22B60/02	C22B60/02		157
C22B60/0252	11	{treatment or purification of solutions or of liquors or of slurries (C22B60/0221 takes precedence)}	C22B60/02	C22B60/02		155
C22B60/0256	12	{using biological agents, e.g. microorganisms or algae}	C22B60/02	C22B60/02		30
C22B60/026	12	{liquid-liquid extraction with or without dissolution in organic solvents}	C22B60/02	C22B60/02		603
C22B60/0265	12	{extraction by solid resins}	C22B60/02	C22B60/02		428
C22B60/0269	13	{Extraction by activated carbon containing adsorbents}	C22B60/02	C22B60/02		8
C22B60/0273	13	{Extraction by titanium containing adsorbents, e.g. by hydrous titanium oxide (C22B60/0269 takes precedence)}	C22B60/02	C22B60/02		18
C22B60/0278	12	{by chemical methods (C22B60/0256, C22B60/026, C22B60/0265 take precedence)}	C22B60/02	C22B60/02		294
C22B60/0282	13	{Solutions containing P ions, e.g. treatment of solutions resulting from the leaching of phosphate ores or recovery of uranium from wet-process phosphoric acid}	C22B60/02	C22B60/02		63
C22B60/0286	10	{refining, melting, remelting, working up uranium}	C22B60/02	C22B60/02		93
C22B60/0291	9	{obtaining thorium}	C22B60/02	C22B60/02		330
C22B60/0295	9	{obtaining other actinides except plutonium}	C22B60/02	C22B60/02		186
C22B60/04	9	Obtaining plutonium	C22B60/04	C22B60/04		292
C22B61/00	7	Obtaining metals not elsewhere provided for in this subclass (iron C21)	C22B61/00	C22B61/00		575
