An efficient synthesis of 1-chloro-2, 2-difluoroethylene via the reductive dechlorination of 1, 2, 2-trichloro-1, 1-difluoroethane. (1st May 2013)

• Record Type: Journal Article
• Authors: Wang, Nong; Yang, Lijuan; Xiang, Shaoji
• Is Part Of: Journal of chemical research. Volume 37:Number 5(2013)
• Page Start: 273
• Page End: 275
• Publication Date: 2013-05-01
• Subjects: Chemistry -- Research -- Periodicals; Chemistry -- Periodicals; 540.5
• DOI: 10.3184/096034013X13644802548720
• Languages: English
• ISSNs: 1747-5198

Abstract

1-Chloro-2, 2-difluoroethylene was prepared from 1, 2, 2-trichloro-1, 1-difluoroethane by reductive dechlorination in the presence of zero-valent zinc. Eleven different solvents were investigated and the best results were obtained in methanol, dimethyl formamide and ethanol at 80 °C. A large-scale experiment using ethanol as a solvent gave 1-chloro-2, 2-difluoroethylene in high yield. These results provide a method for producing 1-chloro-2, 2-difluoroethylen e on an industrial scale because 1, 2, 2-trichloro-1, 1-difluoroethane is the waste material arising from 2, 2-dichloro-1, 1, 1-trifluoroethane production. These results can also provide a method for solving the recycling problem of 1, 2, 2-trichloro-1, 1-difluoroethane in 2, 2-dichloro-1, 1, 1-trifluoroethane production.