US PATENT SUBCLASS 502 / 82
.~.~.~ Plural acid treatment

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  DF  .~.~ Acid treating {2}
82.~.~.~ Plural acid treatment

DEFINITION

Classification: 502/82

Plural acid treatment:

(under subclass 81) Process in which the clay is treated with a second acid or product of such process.

(1) Note. The treatment may involve the use of the same acid more than once or different acids either simultaneously or sequentially.