It can be prepared by fluorination and dehydrohalogenation/dehydrochlorination reactions starting with 1,1,1,3,3-pentachloropropane or 1,1,3,3-tetrachloropropane using the below steps: • In a liquid phase reactor,
HFC-240fa (or 1,1,3,3-tetrachloropropene and derivatives such as 1,3,3,3-tetrachloropropene) are converted to HF in the presence of a catalyst forming a mixture of 245fa, 244fa, 1234ze, and 1233zd; • Removal of HCl and HF. • In a liquid or gas phase reactor, the organic mixture is reacted with HCl in the presence of a catalyst to convert unsaturated olefins to alkanes. • Isolating and purifying the
HFC-245fa product • HFO-243fa and HFO-244fa are dehydrochlorinated with a caustic solution in the liquid phase or with a catalyst in the vapor phase to form HFO-1233zd and
trans-1234ze(E-isomer). • Isolation and purifying the HFO-1233zd product into its isomers. ==References==