US PATENT SUBCLASS 502 / 81
.~.~ Acid treating


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

60  DF  ZEOLITE OR CLAY, INCLUDING GALLIUM ANALOGS {13}
80  DF  .~ Clay {2}
81.~.~ Acid treating {2}
82  DF  .~.~.~> Plural acid treatment
83  DF  .~.~.~> Sulfuric or hydrochloric acid


DEFINITION

Classification: 502/81

Acid treating:

(under subclass 80) Process in which the clay is contacted with an acid or the product of such process.