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2 022 988

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IPC

(21) (22)

Application

5031442/05, 1991-07-08

(22)

Actual filing date

1991-07-08

(45)

Published

1994-11-15

(72)

Inventor

Luchkevich E.R.Khomut V.M.Sushina S.V.Serikbaev A.K.Ermakova T.L.Gladilina K.P.Vasilishin E.V.

(73)

Holder

Ivano-Frankovskaja Firma

PROCES FOR PRODUCING ACIDIC LIGNIN-CONTAINING MONOAZO DYE Russian patent published in 1994 - IPC

Abstract RU 2022988 C1

FIELD: chemistry, particularly, processes for dyeing sheep leather. SUBSTANCE: this method prescribes diazotizing gamma-acid and reacting latter with aqueous solution of lignin. Diazotized gamma-acid and lignin shall be taken in ratio of 1 : (1.31 to 1.80), respectively. pH value: 89 to 9.9. EFFECT: more sophisticated technique and broader range of tinning dyes. 1 tbl

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RU 2 022 988 C1

Authors

Luchkevich E.R.

Khomut V.M.

Sushina S.V.

Serikbaev A.K.

Ermakova T.L.

Gladilina K.P.

Vasilishin E.V.

Dates

1994-11-15—Published

1991-07-08—Filed