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US 8,895,788 B2Granted
Process for the manufacture of hydrofluoroolefins
AssigneeArkema Inc.
InventorsMaher Y. Elsheikh, Philippe Bonnet, John A. Wismer
Life of this patent
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Abstract
The invention relates to a process for manufacturing 1,1,1,2-tetrafluoropropene (1234yf, CF3—CF═CH2) from 1,1,3,3-tetrachlororopropene (1230za, CCl2═CH—CHCl2) and/or 1,1,1,3,3-pentachloropropane (240fa, CCl3CH2CHCl2). The process comprises a step of isomerization of 1,1,3,3-tetrafluoropropene (1230za) to 1,1,2,3-tetrachloropropene (1230xa) followed by conversion of the 1,1,2,3-tetrachloropropene (1230xa) to 1,1,1,2-tetrafluoropropene (1234yf) via a hydrofluorination process.
Claims10
A process for preparing 1,1,1,2-tetrafluoropropene (1234yf) from 1,1,3,3-tetrachloropropene (1230za) comprising the steps of:
- isomerization of 1,1,3,3-tetrachloropropene (1230za) to 1,1,2,3-tetrachloropropene (1230xa);
- followed by
- conversion of said 1,1,2,3-tetrachloropropene (1230xa) to 1,1,1,2-tetrafluoropropene (1234yf) via a process comprising hydrofluorination.
Dependencies are inferred from the claim text.