C01F1/00	7	Methods of preparing compounds of the metals beryllium, magnesium, aluminium, calcium, strontium, barium, radium, thorium, or the rare earths, in general	C01F1/00	C01F1/00		121
C01F3/00	7	Compounds of beryllium	C01F3/00	C01F3/00		214
C01F3/005	8	{Fluorides or double fluorides of beryllium with alkali metals or ammonium; Preparation of beryllium compounds therefrom}	C01F3/00	C01F3/00		123
C01F3/02	8	Oxides; Hydroxides	C01F3/02	C01F3/02		40
C01F5/00	7	Compounds of magnesium	C01F5/00	C01F5/00		346
C01F5/02	8	Magnesia	C01F5/02	C01F5/02		690
C01F5/04	9	by oxidation of metallic magnesium	C01F5/04	C01F5/04		90
C01F5/06	9	by thermal decomposition of magnesium compounds (calcining magnesite or dolomite C04B2/10)	C01F5/06	C01F5/06		543
C01F5/08	10	by calcining magnesium hydroxide	C01F5/08	C01F5/08		362
C01F5/10	10	by thermal decomposition of magnesium chloride with water vapour	C01F5/10	C01F5/10		117
C01F5/12	10	by thermal decomposition of magnesium sulfate, with or without reduction	C01F5/12	C01F5/12		83
C01F5/14	8	Magnesium hydroxide	C01F5/14	C01F5/14		560
C01F5/145	9	{Purification}	C01F5/14	C01F5/14		65
C01F5/16	9	by treating magnesia, e.g. calcined dolomite, with water or solutions of salts not containing magnesium	C01F5/16	C01F5/16		151
C01F5/20	9	by precipitation from solutions of magnesium salts with ammonia	C01F5/20	C01F5/20		268
C01F5/22	9	from magnesium compounds with alkali hydroxides or alkaline- earth oxides or hydroxides	C01F5/22	C01F5/22		646
C01F5/24	8	Magnesium carbonates	C01F5/24	C01F5/24		1059
C01F5/26	8	Magnesium halides	C01F5/26	C01F5/26		18
C01F5/28	9	Fluorides	C01F5/28	C01F5/28		209
C01F5/30	9	Chlorides	C01F5/30	C01F5/30		728
C01F5/305	10	{Dehydrating ammonium or alkali magnesium chlorides, e.g. carnalite}	C01F5/30	C01F5/30		35
C01F5/32	10	Preparation of anhydrous magnesium chloride by chlorinating magnesium compounds	C01F5/32	C01F5/32		140
C01F5/34	10	Dehydrating magnesium chloride containing water of crystallisation	C01F5/34	C01F5/34		165
C01F5/36	9	Bromides	C01F5/36	C01F5/36		14
C01F5/38	8	Magnesium nitrates	C01F5/38	C01F5/38		89
C01F5/40	8	Magnesium sulfates (double sulfates of magnesium with sodium or potassium C01D5/12, with other alkali metals {C01D15/00}, C01D17/00)	C01F5/40	C01F5/40		693
C01F5/42	8	Magnesium sulfites	C01F5/42	C01F5/42		98
C01F7/00	7	Compounds of aluminium	C01F7/00	C01F7/00		321
C01F7/02	8	Aluminium oxide; Aluminium hydroxide; Aluminates	C01F7/02	C01F7/02		2523
C01F7/021	9	After-treatment of oxides or hydroxides	C01F7/021	C01F7/021		928
C01F7/022	10	Classification	C01F7/022	C01F7/022		43
C01F7/023	10	Grinding, deagglomeration or disintegration	C01F7/023	C01F7/023		196
C01F7/025	10	Granulation or agglomeration	C01F7/025	C01F7/025		185
C01F7/026	10	Making or stabilising dispersions	C01F7/026	C01F7/026		115
C01F7/027	10	Treatment involving fusion or vaporisation	C01F7/027	C01F7/027		126
C01F7/028	9	Beta-aluminas	C01F7/028	C01F7/028		68
C01F7/04	9	Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom (C01F7/028 takes precedence)	C01F7/04	C01F7/04		356
C01F7/043	10	Lithium aluminates	C01F7/043	C01F7/043		153
C01F7/046	10	Stabilisation of aluminates	C01F7/046	C01F7/046		20
C01F7/06	10	by treating aluminous minerals or waste-like raw materials with alkali hydroxide, e.g. leaching of bauxite according to the Bayer process (obtaining aluminium oxide or hydroxide from the resulting aluminate solution C01F7/14)	C01F7/06	C01F7/06		259
C01F7/0606	11	Making-up the alkali hydroxide solution from recycled spent liquor	C01F7/0606	C01F7/0606		88
C01F7/0613	11	Pretreatment of the minerals, e.g. grinding	C01F7/0613	C01F7/0613		162
C01F7/062	11	Digestion	C01F7/062	C01F7/062		140
C01F7/0626	12	Processes making use of tube digestion only	C01F7/0626	C01F7/0626		20
C01F7/0633	12	characterised by the use of additives	C01F7/0633	C01F7/0633		68
C01F7/064	12	Apparatus for digestion, e.g. digestor vessels or heat exchangers	C01F7/064	C01F7/064		44
C01F7/0646	11	Separation of the insoluble residue, e.g. of red mud	C01F7/0646	C01F7/0646		95
C01F7/0653	12	characterised by the flocculant added to the slurry (final clarification of the aluminate solution C01F7/47)	C01F7/0653	C01F7/0653		113
C01F7/066	11	Treatment of the separated residue	C01F7/066	C01F7/066		214
C01F7/0666	11	Process control or regulation	C01F7/0666	C01F7/0666		37
C01F7/0673	11	from phosphate-containing minerals	C01F7/0673	C01F7/0673		38
C01F7/068	11	from carbonate-containing minerals, e.g. dawsonite	C01F7/068	C01F7/068		9
C01F7/0686	11	from sulfate-containing minerals, e.g. alunite	C01F7/0686	C01F7/0686		46
C01F7/0693	11	from waste-like raw materials, e.g. fly ash or Bayer calcination dust	C01F7/0693	C01F7/0693		229
C01F7/08	10	by treating aluminous minerals with sodium carbonate, e.g. sinter processes (C01F7/0613, C01F7/066 take precedence)	C01F7/08	C01F7/08		160
C01F7/085	11	according to the lime-sinter process	C01F7/085	C01F7/085		21
C01F7/10	10	by treating aluminous minerals with alkali sulfates and reducing agents	C01F7/10	C01F7/10		17
C01F7/12	10	Alkali metal aluminates from alkaline-earth metal aluminates	C01F7/12	C01F7/12		76
C01F7/14	10	Aluminium oxide or hydroxide from alkali metal aluminates	C01F7/14	C01F7/14		356
C01F7/141	11	from aqueous aluminate solutions by neutralisation with an acidic agent	C01F7/141	C01F7/141		225
C01F7/142	12	with carbon dioxide	C01F7/142	C01F7/142		316
C01F7/144	11	from aqueous aluminate solutions by precipitation due to cooling, e.g. as part of the Bayer process	C01F7/144	C01F7/144		261
C01F7/145	12	characterised by the use of a crystal growth modifying agent other than aluminium hydroxide seed	C01F7/145	C01F7/145		61
C01F7/147	12	Apparatus for precipitation	C01F7/147	C01F7/147		52
C01F7/148	12	Separation of the obtained hydroxide, e.g. by filtration or dewatering	C01F7/148	C01F7/148		53
C01F7/16	9	Preparation of alkaline-earth metal aluminates or magnesium aluminates; Aluminium oxide or hydroxide therefrom (C01F7/028 takes precedence)	C01F7/16	C01F7/16		93
C01F7/162	10	Magnesium aluminates	C01F7/162	C01F7/162		280
C01F7/164	10	Calcium aluminates	C01F7/164	C01F7/164		340
C01F7/166	10	Strontium aluminates	C01F7/166	C01F7/166		30
C01F7/168	10	Barium aluminates	C01F7/168	C01F7/168		31
C01F7/18	10	Aluminium oxide or hydroxide from alkaline earth metal aluminates	C01F7/18	C01F7/18		53
C01F7/20	9	Preparation of aluminium oxide or hydroxide from aluminous ores using acids or salts	C01F7/20	C01F7/20		165
C01F7/22	10	with halides or halogen acids	C01F7/22	C01F7/22		202
C01F7/24	10	with nitric acid or nitrogen oxides	C01F7/24	C01F7/24		123
C01F7/26	10	with sulfuric acids or sulfates	C01F7/26	C01F7/26		255
C01F7/28	10	with sulfurous acid	C01F7/28	C01F7/28		54
C01F7/30	9	Preparation of aluminium oxide or hydroxide by thermal decomposition or by hydrolysis or oxidation of aluminium compounds	C01F7/30	C01F7/30		766
C01F7/302	10	Hydrolysis or oxidation of gaseous aluminium compounds in the gaseous phase	C01F7/302	C01F7/302		94
C01F7/304	11	of organic aluminium compounds	C01F7/304	C01F7/304		43
C01F7/306	10	Thermal decomposition of hydrated chlorides, e.g. of aluminium trichloride hexahydrate	C01F7/306	C01F7/306		165
C01F7/308	10	Thermal decomposition of nitrates	C01F7/308	C01F7/308		184
C01F7/32	10	Thermal decomposition of sulfates including complex sulfates, e.g. alums	C01F7/32	C01F7/32		218
C01F7/34	9	Preparation of aluminium hydroxide by precipitation from solutions containing aluminium salts	C01F7/34	C01F7/34		865
C01F7/36	10	from organic aluminium salts	C01F7/36	C01F7/36		325
C01F7/38	9	Preparation of aluminium oxide by thermal reduction of aluminous minerals	C01F7/38	C01F7/38		172
C01F7/40	10	in the presence of aluminium sulfide	C01F7/40	C01F7/40		57
C01F7/42	9	Preparation of aluminium oxide or hydroxide from metallic aluminium, e.g. by oxidation	C01F7/42	C01F7/42		180
C01F7/422	10	by oxidation with a gaseous oxidator at a high temperature	C01F7/422	C01F7/422		82
C01F7/424	11	using a plasma	C01F7/424	C01F7/424		21
C01F7/426	10	by applying mechanical energy to solid aluminium at a low temperature	C01F7/426	C01F7/426		5
C01F7/428	10	by oxidation in an aqueous solution	C01F7/428	C01F7/428		206
C01F7/44	9	Dehydration of aluminium oxide or hydroxide, i.e. all conversions of one form into another involving a loss of water	C01F7/44	C01F7/44		135
C01F7/441	10	by calcination	C01F7/441	C01F7/441		716
C01F7/442	11	in presence of a calcination additive	C01F7/442	C01F7/442		195
C01F7/444	11	Apparatus therefor	C01F7/444	C01F7/444		70
C01F7/445	11	making use of a fluidised bed	C01F7/445	C01F7/445		75
C01F7/447	10	by wet processes	C01F7/447	C01F7/447		49
C01F7/448	11	using superatmospheric pressure, e.g. hydrothermal conversion of gibbsite into boehmite	C01F7/448	C01F7/448		140
C01F7/46	9	Purification of aluminium oxide, aluminium hydroxide or aluminates (C01F7/028 takes precedence)	C01F7/46	C01F7/46		441
C01F7/47	10	of aluminates, e.g. removal of compounds of Si, Fe, Ga or of organic compounds from Bayer process liquors	C01F7/47	C01F7/47		326
C01F7/473	11	Removal of organic compounds, e.g. sodium oxalate	C01F7/473	C01F7/473		156
C01F7/476	12	by oxidation	C01F7/476	C01F7/476		33
C01F7/48	8	Halides, with or without other cations besides aluminium	C01F7/48	C01F7/48		103
C01F7/50	9	Fluorides	C01F7/50	C01F7/50		540
C01F7/52	10	Double compounds containing both fluorine and other halide groups	C01F7/52	C01F7/52		8
C01F7/54	10	Double compounds containing both aluminium and alkali metals or alkaline-earth metals	C01F7/54	C01F7/54		642
C01F7/56	9	Chlorides (containing fluorine C01F7/52)	C01F7/56	C01F7/56		720
C01F7/57	10	Basic aluminium chlorides, e.g. polyaluminium chlorides	C01F7/57	C01F7/57		324
C01F7/58	10	Preparation of anhydrous aluminium chloride	C01F7/58	C01F7/58		251
C01F7/60	11	from oxygen-containing aluminium compounds	C01F7/60	C01F7/60		259
C01F7/62	10	Purification	C01F7/62	C01F7/62		235
C01F7/64	9	Bromides (containing fluorine C01F7/52)	C01F7/64	C01F7/64		38
C01F7/66	8	Nitrates, with or without other cations besides aluminium	C01F7/66	C01F7/66		156
C01F7/68	8	Aluminium compounds containing sulfur	C01F7/68	C01F7/68		32
C01F7/70	9	Sulfides	C01F7/70	C01F7/70		34
C01F7/72	9	Sulfites	C01F7/72	C01F7/72		18
C01F7/74	9	Sulfates	C01F7/74	C01F7/74		284
C01F7/741	10	Preparation from elemental aluminium or elemental aluminium containing materials, e.g. foil or dross	C01F7/741	C01F7/741		50
C01F7/743	10	Preparation from silicoaluminious materials, e.g. clays or bauxite	C01F7/743	C01F7/743		184
C01F7/745	10	Preparation from alums, e.g. alunite	C01F7/745	C01F7/745		14
C01F7/746	10	After-treatment, e.g. dehydration or stabilisation	C01F7/746	C01F7/746		65
C01F7/748	11	Purification	C01F7/748	C01F7/748		78
C01F7/76	10	Double salts, i.e. compounds containing, besides aluminium and sulfate ions, only other cations, e.g. alums	C01F7/76	C01F7/76		47
C01F7/762	11	Ammonium or alkali metal aluminium sulfates	C01F7/762	C01F7/762		159
C01F7/765	12	Ammonium aluminium sulfates	C01F7/765	C01F7/765		101
C01F7/767	11	Alkaline earth metal aluminium sulfates	C01F7/767	C01F7/767		32
C01F7/77	8	Aluminium carbonates	C01F7/77	C01F7/77		32
C01F7/78	8	Compounds containing aluminium, with or without oxygen or hydrogen, and containing two or more other elements (aluminates&#160;C01F7/02; compounds containing aluminium, fluorine and alkali or alkaline earth&#160;metals&#160;C01F7/54; nitrates containing other cations besides aluminium&#160;C01F7/66; sulfides, sulfites or sulfates containing other cations besides aluminium&#160;C01F7/70 - C01F7/74)	C01F7/78	C01F7/78		273
C01F7/782	9	containing carbonate ions, e.g. dawsonite	C01F7/782	C01F7/782		88
C01F7/784	9	Layered double hydroxide, e.g. comprising nitrate, sulfate or carbonate ions as intercalating anions	C01F7/784	C01F7/784		154
C01F7/785	10	Hydrotalcite	C01F7/785	C01F7/785		566
C01F7/786	9	containing, besides aluminium, only anions, e.g. Al[OH]xCly[SO4]z(mixed halides C01F7/48)	C01F7/786	C01F7/786		105
C01F7/788	9	Ammonium aluminium fluorides, e.g. ammonium hexafluoroaluminate	C01F7/788	C01F7/788		26
C01F11/00	7	Compounds of calcium, strontium, or barium (C01F7/00 takes precedence)	C01F11/00	C01F11/00		424
C01F11/005	8	{Preparation involving liquid-liquid extraction, absorption or ion-exchange}	C01F11/00	C01F11/00		117
C01F11/02	8	Oxides or hydroxides (production of lime C04B2/00)	C01F11/02	C01F11/02		891
C01F11/04	9	by thermal decomposition	C01F11/04	C01F11/04		225
C01F11/06	10	of carbonates	C01F11/06	C01F11/06		434
C01F11/08	9	by reduction of sulfates	C01F11/08	C01F11/08		103
C01F11/10	9	from sulfides	C01F11/10	C01F11/10		88
C01F11/12	9	from silicates	C01F11/12	C01F11/12		28
C01F11/16	9	Purification	C01F11/16	C01F11/16		108
C01F11/18	8	Carbonates	C01F11/18	C01F11/18		2161
C01F11/181	9	{Preparation of calcium carbonate by carbonation of aqueous solutions and characterised by control of the carbonation conditions}	C01F11/18	C01F11/18		1019
C01F11/182	9	{Preparation of calcium carbonate by carbonation of aqueous solutions and characterised by an additive other than CaCO3-seeds}	C01F11/18	C01F11/18		402
C01F11/183	10	{the additive being an organic compound}	C01F11/18	C01F11/18		553
C01F11/184	9	{Preparation of calcium carbonate by carbonation of solutions based on non-aqueous solvents}	C01F11/18	C01F11/18		69
C01F11/185	9	{After-treatment, e.g. grinding, purification, conversion of crystal morphology}	C01F11/18	C01F11/18		873
C01F11/186	9	{Strontium or barium carbonate}	C01F11/18	C01F11/18		43
C01F11/187	10	{Strontium carbonate}	C01F11/18	C01F11/18		142
C01F11/188	10	{Barium carbonate}	C01F11/18	C01F11/18		206
C01F11/20	8	Halides	C01F11/20	C01F11/20		45
C01F11/22	9	Fluorides	C01F11/22	C01F11/22		762
C01F11/24	9	Chlorides	C01F11/24	C01F11/24		428
C01F11/26	10	from sulfides	C01F11/26	C01F11/26		13
C01F11/28	10	by chlorination of alkaline-earth metal compounds	C01F11/28	C01F11/28		228
C01F11/30	10	Concentrating; Dehydrating; Preventing the adsorption of moisture or caking	C01F11/30	C01F11/30		132
C01F11/32	10	Purification	C01F11/32	C01F11/32		154
C01F11/34	9	Bromides	C01F11/34	C01F11/34		35
C01F11/36	8	Nitrates	C01F11/36	C01F11/36		103
C01F11/38	9	Preparation with nitric acid or nitrogen oxides	C01F11/38	C01F11/38		145
C01F11/40	9	Preparation by double decomposition with nitrates	C01F11/40	C01F11/40		23
C01F11/42	9	Double salts (with magnesium C01F5/38)	C01F11/42	C01F11/42		17
C01F11/44	9	Concentrating; Crystallisating; Dehydrating; Preventing the absorption of moisture or caking	C01F11/44	C01F11/44		82
C01F11/46	8	Sulfates (dehydration of gypsum {for the production of calcium sulfate cements}C04B11/02)	C01F11/46	C01F11/46		2023
C01F11/462	9	{Sulfates of Sr or Ba}	C01F11/46	C01F11/46		537
C01F11/464	9	{Sulfates of Ca from gases containing sulfur oxides}	C01F11/46	C01F11/46		674
C01F11/466	9	{Conversion of one form of calcium sulfate to another}	C01F11/46	C01F11/46		521
C01F11/468	9	{Purification of calcium sulfates}	C01F11/46	C01F11/46		415
C01F11/48	8	Sulfites	C01F11/48	C01F11/48		113
C01F13/00	7	Compounds of radium	C01F13/00	C01F13/00		85
C01F15/00	7	Compounds of thorium	C01F15/00	C01F15/00		324
C01F17/00	7	Compounds of rare earth metals<br><br><u>NOTE</u><br><br>In this group, the following expression is used with the meaning indicated; "rare earth metals" means elements from the group of the lanthanides as well as scandium or yttrium, taken alone or in combination.<br>When classifying a compound in groups C01F17/20 - C01F17/38, then its specific preparation or treatment must also be classified in groups C01F17/10 - C01F17/17&#160;as long as the compound is characterised by its preparation or treatment and vice versa.	C01F17/00	C01F17/00		224
C01F17/10	8	Preparation or treatment, e.g. separation or purification	C01F17/10	C01F17/10		1411
C01F17/13	9	by using ion exchange resins, e.g. chelate resins	C01F17/13	C01F17/13		120
C01F17/17	9	involving a liquid-liquid extraction	C01F17/17	C01F17/17		248
C01F17/20	8	Compounds containing only rare earth metals as the metal element	C01F17/20	C01F17/20		59
C01F17/206	9	oxide or hydroxide being the only anion	C01F17/206	C01F17/206		760
C01F17/212	10	Scandium oxides or hydroxides	C01F17/212	C01F17/212		136
C01F17/218	10	Yttrium oxides or hydroxides	C01F17/218	C01F17/218		377
C01F17/224	10	Oxides or hydroxides of lanthanides	C01F17/224	C01F17/224		395
C01F17/229	11	Lanthanum oxides or hydroxides	C01F17/229	C01F17/229		242
C01F17/235	11	Cerium oxides or hydroxides	C01F17/235	C01F17/235		1173
C01F17/241	10	containing two or more rare earth metals, e.g. NdPrO3 or LaNdPrO3	C01F17/241	C01F17/241		253
C01F17/247	9	Carbonates	C01F17/247	C01F17/247		251
C01F17/253	9	Halides	C01F17/253	C01F17/253		69
C01F17/259	10	Oxyhalides	C01F17/259	C01F17/259		57
C01F17/265	10	Fluorides	C01F17/265	C01F17/265		219
C01F17/271	10	Chlorides	C01F17/271	C01F17/271		288
C01F17/276	9	Nitrates	C01F17/276	C01F17/276		139
C01F17/282	9	Sulfates	C01F17/282	C01F17/282		107
C01F17/288	9	Sulfides	C01F17/288	C01F17/288		100
C01F17/294	10	Oxysulfides	C01F17/294	C01F17/294		80
C01F17/30	8	Compounds containing rare earth metals and at least one element other than a rare earth metal, oxygen or hydrogen, e.g. La4S3Br6(C01F17/247 - C01F17/294&#160;take precedence)	C01F17/30	C01F17/30		255
C01F17/32	9	oxide or hydroxide being the only anion, e.g. NaCeO2 or MgxCayEuO	C01F17/32	C01F17/32		293
C01F17/34	10	Aluminates, e.g. YAlO3&#160;or Y3-xGdxAl5O12	C01F17/34	C01F17/34		270
C01F17/36	9	halogen being the only anion, e.g. NaYF4	C01F17/36	C01F17/36		288
C01F17/38	9	sulfur being the only anion, e.g. CaLa2S4	C01F17/38	C01F17/38		33
