US PATENT SUBCLASS 502 / 60
ZEOLITE OR CLAY, INCLUDING GALLIUM ANALOGS

Current as of: June, 1999
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502 /   HD   CATALYST, SOLID SORBENT, OR SUPPORT THEREFOR: PRODUCT OR PROCESS OF MAKING

60ZEOLITE OR CLAY, INCLUDING GALLIUM ANALOGS {13}
61  DF  .~> Gallium containing
62  DF  .~> Including organic component
63  DF  .~> And additional AL or Si containing component {2}
73  DF  .~> And Group III or rare earth metal (Al, Ga, In, Tl, Sc, Y) or Lanthanide containing
74  DF  .~> And Group VIII (Iron Group or Platinum Group) containing
75  DF  .~> Including chemical reduction of exchanged cation
76  DF  .~> Coprecipitation
77  DF  .~> ZSM type
78  DF  .~> Mordenite type
79  DF  .~> Faujasite type (e.g., X or Y, etc.)
80  DF  .~> Clay {2}
85  DF  .~> Activating treatment {1}
87  DF  .~> Support per se

DEFINITION

Classification: 502/60

ZEOLITE OR CLAY, INCLUDING GALLIUM ANALOGS:

(under the class definition) Composition which contains a naturally occurring earthy aluminum silicate having the characteristics set out in the glossary term "clay" or "zeolite" or a synthetic replica of the natural material, or similar materials which contain gallium rather than aluminum.

(1) Note. A synthetic zeolite, per se, is provided for in Class 423, Chemistry of Inorganic Compounds, and subclass 700 definition explains the distinction between what is considered a zeolite compound and a mixture. For placement in this class (502) a zeolite must be admixed with something or be claimed in terms of structure, sufficient to cause classification in Class 428 rather than in Class 423. A simple ion exchange operation is considered to give a different zeolite compound still proper for Class 423. A subsequent reduction of an exchanged ion is considered to comprise a mixture, proper for a composition class. Because particular pore size and/or shape is an inherent property of a zeolite, recitation of pore structure peculiar to catalysis or sorption, by itself, is not sufficient for placement in this class (502). This contrasts with classification of Raney-type catalysts and activated carbon sorbents.

(2) Note. See section V, Glossary, of the class definition for this class (502) for definitions of clay and zeolite.

(3) Note. A better understanding of zeolites may be had by consulting such literature as Zeolite Molecular Sieves, O. W. Breck, John Wiley and Sons, 1974.

(4) Note. Some earthly silicon compounds that are not clay or zeolite include Asbestos, Diaspore, Diatomaceous, Diatomite, Feldspar, Guhr, Kieselguhr, Mica earth, Quartz, and Sand.

SEE OR SEARCH CLASS

252, Compositions, 179, and 184 for a zeolite composition used in ion- exchange.