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2 135 463

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IPC

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Application

97121806/04, 1997-12-16

(24)

Start date

1997-12-16

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Actual filing date

1997-12-16

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Published

1999-08-27

(72)

Inventor

Konovalov S.I.Zabolotskikh V.F.Igumnov S.M.

(73)

Holder

Permskij Filial Rossijskogo Nauchnogo Tsentra Khimija"

METHOD OF SYNTHESIS OF TRIFLUOROMETHANE SULFOACID Russian patent published in 1999 - IPC

Abstract RU 2135463 C1

FIELD: organic chemistry and chemical technology. SUBSTANCE: invention relates to a method of synthesis of trifluoromethane sulfoacid that is used as a catalyst in reactions of polymerization, esterification and dehydration. Trifluoromethane sulfoacid is synthesized by hydrolysis of trifluoromethanesulfofluoriide with an aqueous-spirituous mixture at 80-120 C followed by isolation of trifluoromethane sulfoacid as an azeotrope with water and treatment of azeotrope with oleum and distillation off an anhydrous trifluoromethane sulfoacid from obtained mixture. Lower aliphatic alcohols are used in the process of hydrolysis. Method provides an avoidance of salts and solid waste formation. EFFECT: simplified technology, decreased number of stages. 1 tbl, 11 ex

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RU 2 135 463 C1

Authors

Konovalov S.I.

Zabolotskikh V.F.

Igumnov S.M.

Dates

1999-08-27—Published

1997-12-16—Filed

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