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IPC

(21) (22)

Application

4218201/26, 1987-01-19

(22)

Actual filing date

1987-01-19

(45)

Published

1994-11-30

(72)

Inventor

Kolganova D.N.Jurevich V.P.Jakovleva M.G.Krjukova Ju.I.Chirjat'Ev S.N.Bitkov E.G.

METHOD OF ACID SEWAGE TREATMENT OF SULFODIMETHOXINE PRODUCTION Russian patent published in 1994 - IPC

Abstract SU 1496208 A1

FIELD: ecology safety. SUBSTANCE: method involves three-stage treatment of sewage with 25% ammonia solution up to pH 7-7.5, 8-8.5 and 9-12 using extraction of dimethylaniline with toluene after the first and second stage and water cooling after the third stage at temperature from -15 to +5 C, isolation of diammonium phosphate, its washing with acetone or methanol. EFFECT: improved purification of organic impurities, enhanced degree of dimethylaniline regeneration and isolation of diammonium phosphate utilized as a fertilizer. 1 tbl

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SU 1 496 208 A1

Authors

Kolganova D.N.

Jurevich V.P.

Jakovleva M.G.

Krjukova Ju.I.

Chirjat'Ev S.N.

Bitkov E.G.

Dates

1994-11-30—Published

1987-01-19—Filed