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2 010 791

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Application

5032516/04, 1992-03-17

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Actual filing date

1992-03-17

(45)

Published

1994-04-15

(72)

Inventor

Filippov V.M.Okhterova I.A.Ehndjus'Kin P.N.Shkuro V.G.Tsarev N.V.Efimov V.Ju.Materikin I.V.

(73)

Holder

Cheboksarskoe Proizvodstvennoe Ob"Edinenie

METHOD OF 4-TOLUIDINE-3-SULFONATE SODIUM SYNTHESIS Russian patent published in 1994 - IPC

Abstract RU 2010791 C1

FIELD: organic chemistry, chemical industry. SUBSTANCE: product: 4-toluidine-3-sulfonate sodium. Reagent 1: 4-toluidine. Reagent 2: concentrated sulfuric acid. Reagent 3: sodium hydroxide. Reaction conditions: sulfonation is carried out at 175-180 C in the medium of benzene polychlorides firstly. Then sulfomass is treated with sewage mixture taken from preceding process up to the volume ratio to polychlorobenzene 1-1.5. Mixture is neutralized up to pH 8.5-9, reaction mass is separated for polychlorobenzene and aqueous layers at 80-100 C. The end product is isolated from aqueous layer. EFFECT: improved method of synthesis. 1 tbl

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RU 2 010 791 C1

Authors

Filippov V.M.

Okhterova I.A.

Ehndjus'Kin P.N.

Shkuro V.G.

Tsarev N.V.

Efimov V.Ju.

Materikin I.V.

Dates

1994-04-15—Published

1992-03-17—Filed

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