Gas phase catalytic process for production of vinylidene fluoride.

摘要

Vinylidene fluoride is produced from the catalytic, gas phase reaction of hydrogen fluoride and at least one halohydrocarbon of the formula CHnCXm wherein n and m are 2 or 3 and each X is independently selected from the group of fluorine, chlorine, bromine and iodine, provided each X is not simultaneously fluorine. 1,1,1-Trifluoroethane, added to the vapor phase reaction mixture as a diluent, improves the performance of the fluorination catalyst, increasing selectivity for the desired product, vinylidene fluoride.