An efficient synthesis of 1-chloro-2,2-difluoroethylene via the reductive dechlorination of 1,2,2-trichloro-1,1-difluoroethane

作者：Wang Nong^*; Yang Lijuan; Xiang Shaoji

来源：Journal of Chemical Research, 2013, 37(5): 273-275.

DOI：10.3184/096034013X13644802548720

• green chemistry
• 1-chloro-2,2-difluoroethylene
• reductive dechlorination
• industrial production

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 degrees 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-difluoroethylene 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.

• 出版日期2013-5
• 单位兰州交通大学