METHOD FOR PRODUCTION OF TANNING EXTRACT OF LARCH CORTEX Russian patent published in 1997 - IPC

Abstract RU 2083674 C1

FIELD: chemical industry, production of vegetable tanning extracts. SUBSTANCE: method involves extraction of larch cortex with the help of aqueous-alcohol solution. Preliminary heat activation takes place at 200-260 C and at pressure being varied within 3-5 MPa ranges in 20-120 s. EFFECT: improved efficiency of the method. 1 tbl

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RU 2 083 674 C1

Authors

Kuznetsov B.N.

Levdanskij V.A.

Shilkina T.A.

Polezhaeva N.I.

Dates

1997-07-10—Published

1993-12-22—Filed