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2 072 345

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Application

94031442/04, 1994-08-26

(22)

Actual filing date

1994-08-26

(45)

Published

1997-01-27

(72)

Inventor

Denisov A.K.Dedov A.S.Golubev A.N.Antipenok V.F.Vereshchagina N.S.

(73)

Holder

Aktsionernoe Obshchestvo Khimicheskij Kombinat"

METHOD FOR SEPARATION OF PRODUCTS OF HYDROFLUORINATION OF VINYLYDENE CHLORIDE OR 1,1,1-TRICHLOROETHANE Russian patent published in 1997 - IPC

Abstract RU 2072345 C1

FIELD: production of cooling agent. SUBSTANCE: liquid mixture of 1-fluoro-1,1-dichloroethane and 1,1-difluoro-1-chloroethane is brought into contact with tin tetrachloride, the process is carried out at elevated temperature and pressure, preferably at 50-150 C and 5-21 atm. Then thus prepared product is affected by distillation, hydrogen chloride being sorbed of it by water; organic products are neutralized, condensed and separated by rectification. During said contact additionally vinylydene chloride or 1,1,1-trichloroethane may be added, their quantity being up to 1.12 moles per 1 mole of HF. EFFECT: simplifies the process of separation. 4 cl, 2 tbl

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RU 2 072 345 C1

Authors

Denisov A.K.

Dedov A.S.

Golubev A.N.

Antipenok V.F.

Vereshchagina N.S.

Dates

1997-01-27—Published

1994-08-26—Filed

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