Patent ID: 8766020
Filing Date: 2014-07-01
Classification: C07C

Abstract:
1. A method for producing 2,3,3,3-tetrafluoropropene (1234yf) comprising: (a) providing a raw stream comprising 1,1,1,2,3-pentafluoropropane (245eb) and greater than about 2% by weight of each of 1,1,1,2,3,3-hexafluoropropane (236ea) and 1,2,3,3,3-pentafluoropropene (1225ye), based on the total weight of 245eb in the raw stream, (b) treating said raw stream to form a reactor feed stream such that the reactor feed stream contains not more than about 2% by weight of the compounds 1,1,1,2,3,3-hexafluoropropane (236ea) and 1,2,3,3,3-pentafluoropropene (1225ye), based on the total weight of 245eb in the reactor feed stream(s) wherein said treating comprises photochlorination; and (c) dehydrohalogenating said treated reactor feed stream to form 2,3,3,3-tetrafluoropropene (1234yf).