Patent ID: 9045386
Filing Date: 2015-06-02
Classification: B01J,C07B,C07C,Y02P

Abstract:
1. A process for the formation of a 1233zd reaction product having a majority of E-isomer comprising: conducting a catalytic liquid phase reaction between HF and a mixture of organic hydrohalocarbons consisting of 1,1,1,3,3-pentachloropropane (HCC-240fa), 1,1,3,3-tetrachloropropene and 1,3,3,3-tetrachloropropene to create a first crude product stream comprising 1233zd(E); wherein said hydrogen fluoride and said hydrohalocarbons are present in a HF:organic molar ratio of about 9:1; wherein the catalyst comprises titanium tetrachloride; wherein the temperature of the liquid phase reaction is maintained at from about 85° C. to about 120° C.; wherein the E-isomer yield is further improved to above 94% by passing the liquid phase crude product stream through a stripping column as it leaves the reactor to reflux unreacted reactants back to the reactor; and wherein the stripping column is operated to achieve an average stripping temperature of from about 10° C. to about 40° C. below the corresponding reaction temperature.