METHOD OF ACIDIC YELLOW MONOAZO-DYE SYNTHESIS Russian patent published in 1994 - IPC

Abstract RU 2007429 C1

FIELD: organic chemistry. SUBSTANCE: method involves coupling of diazotized methanylic acid with resorcinol-formaldehyde resin at mass ratio (0,88-0,98): 1, respectively, at 8-12 C and at pH 5,505,9. Yield of dye is 90-93,4% . EFFECT: enhanced yield of dye. 1 tbl

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RU 2 007 429 C1

Authors

Luchkevich E.R.

Khomut V.M.

Kujbida L.V.

Serikbaev A.K.

Zhuk V.M.

Vugenshmidt V.G.

Dates

1994-02-15—Published

1990-08-07—Filed