METHOD FOR PRODUCING OCTAFLUOROCYCLOPENTENE

PROBLEM TO BE SOLVED: To provide a method for industrially advantageously producing high- purity 1,2,3,3,4,4,5,5-octafluorocyclopentene without using any high-purity raw materials. SOLUTION: This method comprises the following two consecutive steps: 1st step: in the presence of a mixed solvent syste...

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Bibliographic Details
Main Authors KIN YOSHIO, MASE TAKANOBU, YAMADA TOSHIRO
Format Patent
LanguageEnglish
Published 11.09.2001
Edition7
Subjects
ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
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Summary:PROBLEM TO BE SOLVED: To provide a method for industrially advantageously producing high- purity 1,2,3,3,4,4,5,5-octafluorocyclopentene without using any high-purity raw materials. SOLUTION: This method comprises the following two consecutive steps: 1st step: in the presence of a mixed solvent system composed of a polar solvent and nonpolar solvent, a mixture comprising at least two chlorofluorocyclopentenes is reacted with a metal fluoride to fluorinate the mixture, the resultant crude product is distilled to isolate a fraction A comprising 1-chloroheptafluorocyclopentene and a fraction B comprising 1,3and 1,4- dichlorohexafluorocyclopentenes, and 2nd step: the fraction A and/or the fraction B is(are) further reacted with a metal fluoride to effect complete fluorination to obtain the objective 1,2,3,3,4,4,5,5-octafluorocyclopentene.
Bibliography:Application Number: JP20000063090