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Application

96109575/04, 1996-05-13

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Start date

1996-05-13

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Actual filing date

1996-05-13

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Published

1999-12-20

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Inventor

Masljakov A.I.Zakharov V.Ju.Dedov A.S.Denisov A.K.Abramov O.B.Golubev A.N.Borovneva N.I.Andrejchatenko V.V.Tataurov V.L.Lavrinov A.G.

(73)

Holder

Aoot Khimicheskij Kombinat Im.B.P.Konstantinova"

TRICHLOROACETIC ACID PURIFICATION METHOD Russian patent published in 1999 - IPC

Abstract RU 2142936 C1

FIELD: industrial organic synthesis. SUBSTANCE: trichloroacetic acid prepared by oxidation chloral-containing mixtures is purified by diluting it to concentration 85- 90 wt % based on total acidity, distilling off low-boiling fractions from resulting solution followed by their condensation, removing chloroorganic impurities from condensate by settling and separation of organic and aqueous phases, and thermally decomposing organic phase. According to invention, trichloroacetic acid solution freed of low-boiling fractions is cooled to crystallize part of the acid, crystals are separated from mother liquor, and the latter is further used for diluting initial trichloroacetic acid. EFFECT: enhanced purification efficiency.

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RU 2 142 936 C1

Authors

Masljakov A.I.

Zakharov V.Ju.

Dedov A.S.

Denisov A.K.

Abramov O.B.

Golubev A.N.

Borovneva N.I.

Andrejchatenko V.V.

Tataurov V.L.

Lavrinov A.G.

Dates

1999-12-20—Published

1996-05-13—Filed

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