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2 053 223

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IPC

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Application

5009796/04, 1991-11-21

(22)

Actual filing date

1991-11-21

(45)

Published

1996-01-27

(72)

Inventor

Andrievskij A.M.Glushchenko S.N.Avidon S.V.Grekhova N.G.

(73)

Holder

Moskovskoe Nauchno-Proizvodstvennoe Ob"Edinenie

METHOD FOR PRODUCTION OF 6-BROM-2-AMINO-4-NITROPHENOL Russian patent published in 1996 - IPC

Abstract RU 2053223 C1

FIELD: chemical industry. SUBSTANCE: method is carried out by reduction of 6-brom-2,4-dinitrophenol. The latter is prepared by nitration and bromination of bromobenzene. Said bromination takes place with the help of brominating agent being chosen of group which contains bromine, bromides of alkali metals, and ammonium bromide. The process is carried out in the presence of sulfuric acid and nitric acid or nitrate. It is followed by hydrolysis thus obtained 1,2-dibrom-3,5-dinitrobenzene by aqueous alkali at 60-65 C. Said hydrolysis may be carried out with the help of ammonium sulfide or sulfides of alkali metals. EFFECT: improves efficiency of method.

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RU 2 053 223 C1

Authors

Andrievskij A.M.

Glushchenko S.N.

Avidon S.V.

Grekhova N.G.

Dates

1996-01-27—Published

1991-11-21—Filed

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