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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| Main Authors | , , |
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| Format | Patent |
| Language | English |
| Published |
11.09.2001
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| Edition | 7 |
| Subjects | |
| Online Access | Get full text |
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| Abstract | 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. |
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| AbstractList | 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. |
| Author | YAMADA TOSHIRO KIN YOSHIO MASE TAKANOBU |
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| RelatedCompanies | NIPPON ZEON CO LTD |
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| Snippet | 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... |
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| Title | METHOD FOR PRODUCING OCTAFLUOROCYCLOPENTENE |
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