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US 9,790,149 B2Granted
Process for preparing C3-6(hydro)fluoroalkenes by dehydrohalogenating C3-6 halo(hydro) fluoroalkanes in the presence of a zinc chromia catalyst
AssigneeMexichem Amanco Holding S.A. de C.V.
InventorsAndrew P Sharratt, Leslie R Seddon
Life of this patent
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Abstract
A process for preparing 2,3,3,3-tetrafluoropropene (CF3CF═CH2). 3,3,3-trifluoro-2-chloropropene (CF3CCl═CH2) is fluorinated with HF in the vapour phase in the presence of a chromia-containing catalyst to produce an intermediate composition 1,1,1,2,2-pentafluoropropane (CF3CF2CH3), which is dehydrofluorinated to produce CF3CF═CH2.
Claims17
A process for preparing 2,3,3,3-tetrafluoropropene (CF3CF═CH2) comprising:
- (i) fluorinating 3,3,3-trifluoro-2-chloropropene (CF3CCl═CH2) with HF in the vapour phase in the presence of a chromia-containing catalyst to produce an intermediate composition comprising 1,1,1,2,2-pentafluoropropane (CF3CF2CH3);
- and
- (ii) dehydrofluorinating the CF3CF2CH3in the intermediate composition to produce CF3CF═CH2.
Dependencies are inferred from the claim text.