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2 009 125

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IPC

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Application

4936179/04, 1991-05-14

(22)

Actual filing date

1991-05-14

(45)

Published

1994-03-15

(72)

Inventor

Konarev A.A.Pomogaeva L.S.Vorotnikova E.Ju.Ehssert V.K.Zmitrovich V.S.Korepanov M.V.Mitrofanov V.S.

(73)

Holder

Moskovskoe Nauchno-Proizvodstvennoe Ob"Edinenie

METHOD FOR PRODUCING ACID SODIUM SALTS OF 2-AMINO-4,8-DISULFOACID NAPHTHALENE Russian patent published in 1994 - IPC

Abstract RU 2009125 C1

FIELD: organic chemistry. SUBSTANCE: desired product has empirical formula С10H8NaNO6S2, its yield is 88% , main substance content is 83.8% . Diammonium salt of 2-nitro-4,8-disulfoacid of naphthalene is electrochemically reduced in electrolyzer. The process takes place on nickel cathode in ammonia-buffer solution having pH 7-8.5, current density being 5-15 A/dm2 at 60-70 C. Anode and cathode space of mentioned above electrolyzer are divided by cation-exchange membrane. EFFECT: improves efficiency of the method.

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RU 2 009 125 C1

Authors

Konarev A.A.

Pomogaeva L.S.

Vorotnikova E.Ju.

Ehssert V.K.

Zmitrovich V.S.

Korepanov M.V.

Mitrofanov V.S.

Dates

1994-03-15—Published

1991-05-14—Filed

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