(under subclass 175) Compositions which contain substantially water-insoluble materials which are adapted to bind or take up bases or cations in exchange for other bases or cations.
SEE OR SEARCH THIS CLASS, SUBCLASS:
193, for compositions for chemically binding ammonia, alkali or other bases.
SEE OR SEARCH CLASS
210, Liquid Purification or Separation,
660+, for processes of separation involving ion exchange or sorption.
423, Chemistry of Inorganic Compounds, 700+, for zeolites and appropriate subclasses for
aluminosilicate compounds having base-exchange capabilities.
