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2 068 429

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C1

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IPC

(21) (22)

Application

93020051/04, 1993-04-09

(22)

Actual filing date

1993-04-09

(45)

Published

1996-10-27

(72)

Inventor

Arinich L.V.Gorelik M.V.Cherenkov V.V.Rjabokon' V.N.Fes'Kova E.A.Kuleshova N.D.

(73)

Holder

Moskovskoe Nauchno-Proizvodstvennoe Ob"Edinenie

PROCESS FOR PREPARING CYANOGROUPS CONTAINING AZO DYES Russian patent published in 1996 - IPC

Abstract RU 2068429 C1

FIELD: dyeing of synthetic fibers. SUBSTANCE: process comprises reacting halogen containing azo dyes with cyanating agent in the presence of copper catalyst and base, and optionally promoters, such as alkali metal halides or quaternary ammonium salts. The cyanating agent is acetone cyanohydride. The claimed process makes it possible to obtain product with yield o 93-97%. Cyanation efficiency for the claimed cyanating agent is 0.9-0.98. EFFECT: improved properties of the cyano groups containing azo dyes.

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RU 2 068 429 C1

Authors

Arinich L.V.

Gorelik M.V.

Cherenkov V.V.

Rjabokon' V.N.

Fes'Kova E.A.

Kuleshova N.D.

Dates

1996-10-27—Published

1993-04-09—Filed

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