Process for producing 1,3,3,3-tetrafluoropropene

摘要

According to the first characteristic of the present invention, there is provided a production process for 1,3,3,3-tetrafluoropropene including: the first step of reacting 1,1,1,3,3-pentachloropropane with hydrogen fluoride thereby obtaining 1-chloro-3,3,3-trifluoropropene; and the second step of reacting 1-chloro-3,3,3-trifluoropropene obtained in the first step with hydrogen fluoride in a gaseous phase in the presence of a fluorination catalyst. According to the second characteristic of the present invention, there is provided a dehydration process including bringing 1,3,3,3-tetrafluoropropene containing at least water into contact with zeolite.

主权项

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.