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2 130 451

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C1

(51)

IPC

(21) (22)

Application

98100913/04, 1998-01-21

(22)

Actual filing date

1998-01-21

(45)

Published

1999-05-20

(72)

Inventor

Korenman Ja.I.Sukhanov P.T.Kalinkina S.P.

(73)

Holder

Voronezhskaja Gosudarstvennaja Tekhnologicheskaja Akademija

METHOD OF EXTRACTION OF 1-NAPHTHOLMONOSULFOACIDS FROM AQUEOUS SOLUTIONS Russian patent published in 1999 - IPC

Abstract RU 2130451 C1

FIELD: chemical technology. SUBSTANCE: method involves extraction of 1-naphtholmonosulfoacids with an organic solvent from aqueous solutions. Extraction is carried out with a mixture nonane/butanol-1 at ratio (43-16): (57-84) wt. -% at pH value of an aqueous solution 3-5 in the presence of a desalting agent. EFFECT: improved method of 1-naphtholmonosulfoacids extraction, increased extraction degree of the end product. 3 tbl, 24 ex

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RU 2 130 451 C1

Authors

Korenman Ja.I.

Sukhanov P.T.

Kalinkina S.P.

Dates

1999-05-20—Published

1998-01-21—Filed

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