Patent ID: 9051231
Filing Date: 2015-06-09
Classification: C01B,C07C

Abstract:
1. A process for producing 1,3,3,3-tetrafluoropropene, comprising: a) a first step of reacting 1,1,1,3,3-pentachloropropane with hydrogen fluoride in a liquid phase and in the absence of the fluorination catalyst, within a reaction pressure range of 0.5 to 4.2 MPa, and within a reaction temperature range of 100° C. to 160° C., thereby obtaining 1-chloro-3,3,3-trifluoropropene, wherein 1,1,1,3,3-pentachloropropane and hydrogen fluoride are introduced into a reaction system while hydrogen chloride and 1-chloro-3,3,3-trifluoropropene generated from the reaction are extracted from the reaction system; and b) a second step of reacting 1-chloro-3,3,3-trifluoropropene obtained by the first step with hydrogen fluoride in a gaseous phase and in the presence of a fluorination catalyst.