Patent ID: 9643903
Date: 2017-05-09
CPC Classifications: B01D,C01B,C07C,Y02P

Claim:
1. An integrated system for producing (E)1-chloro-3,3,3-trifluoropropene, wherein the system comprises: (a) one or more feed streams cumulatively comprising hydrogen fluoride and a reactant composition selected from the group consisting of 1,1,1,3,3-pentachloro-propane, or 1,1,1,3,3-pentachloropropane, and/or 1,1,3,3-tetrachloropropene, and/or 1,3,3,3-tetrachloropropene; (b) a liquid phase reactor system consisting of a series of one or more agitated reactors, each fed by its predecessor, and wherein the liquid phase reactor series is fluidly connected to the one or more feed streams; (c) recycle system comprising a recycle distillation column, a reflux stream fluidly connected to the top of the reactor and a combined first crude product stream fluidly connected to the top of the reactor, wherein the reflux stream is fluidly connected to a liquid phase reactor in the series; (d) a hydrogen chloride removal system comprising a first distillation column, a hydrogen chloride by-product stream fluidly connected to the first distillation column, and a second crude product stream fluidly connected to the first distillation column, wherein the first distillation column is fluidly connected to a stripping column; (e) a hydrogen fluoride recovery system comprising a sulfuric acid absorption and recycle system or a phase separation vessel, a second recycle stream comprising hydrogen fluoride fluidly connected to the sulfuric acid absorption and recycle system or a phase separation vessel; (f) a third product stream comprising (E) and (Z) 1-chloro-3,3,3-trifluoro-propene fluidly connected to the sulfuric acid absorption and recycle system or a phase separation vessel, wherein the sulfuric acid absorption and recycle system or a phase separation vessel is fluidly connected to the second crude product stream and a 1-chloro-3,3,3-trifluoropropene purification system comprising a second distillation column fluidly connected to the third product stream and (g) a final product stream comprising at least 50 wt. percent (E)1-chloro-3,3,3-trifluoropropene fluidly connected to the second distillation column; a second by-product stream fluidly connected to the distillation column, an isomerization reactor fluidly connected to the second by-product stream; and a product recycle stream fluidly connected to the isomerization reactor and the second distillation column.