B01J 39/00 - Definition

Definition statement

This subclass covers:

Processes involving solid inorganic or organic cation exchangers and uses of inorganic or organic materials as cation exchangers whereby cations are exchanged between the solid exchanger and a medium to be treated.

Treatment of inorganic or organic materials used as cation exchangers.

Cation exchangers as stationary phases or packings for chromatography processes

Relationship between large subject matter areas

In groups B01J 39/00-B01J 49/00, in the absence of an indication to the contrary, classification is made in the last appropriate place.

Compositions, apparatus or processes involving at least two different types of ion exchangers, e.g. two different cation exchangers, or a cation exchanger and an anion exchanger, are classified using a combination of the corresponding classes.

For example:

• a process involving an organic cation exchanger in the strongly acidic form and an organic cation exchanger in the weakly acidic form is classified with B01J 39/05 and B01J 39/07;
• a process involving an inorganic cation exchanger and an inorganic anion exchanger is classified with: B01J 39/02 and B01J 41/02;
• a process involving an organic cation exchanger in the strongly acidic form and an organic anion exchanger in the weakly basic form is classified with B01J 39/05 and B01J 41/07.

References relevant to classification in this subclass

This subclass does not cover:

Ion-exchange chromatography processes

B01D 15/36

Informative references

Attention is drawn to the following places, which may be of interest for search:

Modifying dairy products by ion exchange	A23C 9/146
Clarifying, fining of non-alcoholic beverage by ion-exchange	A23L 2/78
Use of ion exchange materials for tobacco smoke filters	A24D 3/12
Separation of different isotopes of the same chemical element by ion exchange	B01D 59/30
Ion exchange resins used as catalyst	B01J 31/08
Processes in general for preparing or activating catalysts using ion exchange	B01J 37/30
Regeneration or reactivation of catalysts using ion-exchange	B01J 38/74
Processes involving the treatment of water by ion-exchange	C02F 1/42
Purification or separation of hydrocarbons with ion-exchangers	C07C 7/12
Extraction, separation or purification of peptides by ion exchange chromatography	C07K 1/18
Manufacture of shaped structures of ion-exchange resins	C08J 5/20
Refining of hydrocarbon oils by ion-exchange material	C10G 25/02
Purification, clarification of alcoholic beverages with the aid of ion-exchange material	C12H 1/04
Purification of sugar juices using ion exchange materials	C13B 20/14
Extraction of sugar from molasses using ion exchange	C13B 35/06
Treatment or purification by ion exchange of solutions obtained from the extraction of metals from ores	C22B 3/42
Treating radioactively contaminated liquids using ion exchange	G21F 9/12