Process for the manufacture of hydrochlorofluoroolefins
AssigneeArkema Inc.
InventorsMaher Y. Elsheikh, Philippe Bonnet, John A. Wismer
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Abstract
The present invention provides a process for the manufacture of trans 1-chloro-3,3,3-trifluoropropene (E-1233zd). The first step of the process comprises the fluorination of 1,1,3,3-tetrachlororopropene (1230za, CCh═CH—CHCh) and/or 1,1,1,3,3-pentaachloropropane (240fa) to a mixture of cis 1233zd (Z-1233zd) and trans 1233zd (E-1233zd). The second step of the process comprises a separation of the mixture formed in the first step to isolate cis 1233zd (Z-1233zd) from the mixture. The third step of the process comprises isomerization of cis 1233zd (Z-1233zd) to trans 1233zd (E-1233zd).
Claims24
A process for preparing trans 1-chloro-3,3,3-trifluoropropene (E-1233zd) that comprises at least one step of isomerization of cis 1-chloro-3,3,3-trifluoropropene to trans 1-chloro-3,3,3 -trifluoropropene.
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-tetrachloropropane (240fa) comprising the steps of:
- fluorination of 1,1,3,3-tetrachloropropene (1230za) and/ or 1,1,1,3,3-tetrachloropropane (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 from trans 1233zd (E-1233zd).
Dependencies are inferred from the claim text.