METHOD FOR PRODUCTION OF ACID LIGNIN MONOAZO DYES Russian patent published in 1994 - IPC

Abstract RU 2011668 C1

FIELD: production of acid lignin monoazo dyes. SUBSTANCE: method consists in reaction of hydrolytic lignin with diazotized H-acid, or K-acid, or I-acid, or Chicago-acid taken in relation (by mass) to hydrolytic lignin of 1: (0.35-1.67), respectively, at temperature of 9.0-31 C and pH of 7.5-10.0 for 30-60 min. EFFECT: higher efficiency. 4 tbl

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RU 2 011 668 C1

Authors

Luchkevich E.R.

Khomut V.M.

Sushina S.V.

Serikbaev A.K.

Ermakova T.L.

Gladilina K.P.

Dates

1994-04-30—Published

1991-07-08—Filed