Patent ID: 8642819

Claim:
A process for manufacturing trans 1-chloro 3,3,3 trifluoro propene (E-1233zd) from 1,1,3,3-tetrachloropropene (1230za) and/ or 1,1,1,3,3-pentachloropropane (240fa) comprising the steps of: fluorination of 1,1,3,3-tetrachloropropene (1230za) and/ or 1,1,1,3,3-pentachloropropane (240fa) to a mixture comprising cis 1233zd (Z-1233zd) and trans 1233zd (E-1233zd); followed by separation of said cis 1233zd (Z-1233zd) from said trans 1233zd (E-1233zd); followed by isomerization of said cis 1233zd (Z-1233zd) to form trans 1233zd (E-1233zd).