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2 119 476

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IPC

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Application

96122668/04, 1996-11-28

(22)

Actual filing date

1996-11-28

(45)

Published

1998-09-27

(72)

Inventor

Kuznetsov A.A.Tkachuk L.N.Mudryj F.V.Bogach E.V.Mil'Gotin I.M.

(73)

Holder

Volgogradskoe Otkrytoe Aktsionernoe Obshchestvo

METHOD OF ISOLATION OF TRIFLUOROACETIC ACID FROM AN AQUEOUS REACTION MIXTURE Russian patent published in 1998 - IPC

Abstract RU 2119476 C1

FIELD: chemical technology. SUBSTANCE: invention relates to a method of isolation of trifluoroacetic acid from an aqueous reaction mixture and azeotrope with water. Method involves treatment of an aqueous reaction mixture containing trifluoroacetic acid with extractant. Extractant: dibenzyl ester at mass ratio dibenzyl ester : trifluoroacetic acid = (1.16-7.0):1. The end product is isolated by extract heating at 100-150 C under vacuum at 40-60 mm mercury column. EFFECT: simplified technology, decreased energy consumption, increased yield of the end product. 1 tbl, 4 ex

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RU 2 119 476 C1

Authors

Kuznetsov A.A.

Tkachuk L.N.

Mudryj F.V.

Bogach E.V.

Mil'Gotin I.M.

Dates

1998-09-27—Published

1996-11-28—Filed

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