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US 8,076,521 B2Granted
Process for the manufacture of hydrofluoroolefins
AssigneeArkema Inc.
InventorsMaher Y. Elsheikh, Philippe Bonnet, Benjamin Bin Chen
Life of this patent
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Abstract
In this invention we are disclosing a process for the synthesis of hydrochlorofluoro olefins (HCFO) and/or hydrofluoroolefins (HFO). The process is based on the following steps of liquid phase, noncatalytic fluorination of hydrochloropropenes to form hydrochlorofluoropropenes and/or hydrofluoropropenes, followed by gas phase, catalytic fluorination of the hydrochlorofluoropropenes to form hydrofluoropropenes.
Claims20
A process for producing 1,1,1,2-tetrafluoropropene, comprising the steps of:
- a) fluorinating 1,1,2,3-tetrachloropropene, in a liquid phase, without catalyst, to form 2-chloro-3,3,3-tri-fluoropropene and HCL and first co-products;
- and thereafter
- b) fluorinating said 2-chloro-3,3,3-tri-fluoropropene, in a gas phase, in the presence of a catalyst selected from the group consisting of aluminum fluoride, supported chromium catalyst, unsupported chromium catalyst and mixtures thereof, to form 1,1,1,2-tetrafluoropropene and second co-products.
Dependencies are inferred from the claim text.