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AssigneeMexichem Fluor S.A. De C.V.
InventorsEMMA J HODGSON, CLAIRE ELIZABETH McGUINNESS, CLIVE ROBERT GIDDIS, JAMES HENRY MURRAY, CLARE MARY SKAE, GARY LLOYD
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The present invention provides a process for preparing 3,3,3-trifluoropropene (1243zf), the process comprising: (a)fluorinating CCI3CH2CH2CI (250fb) to produce a reaction product comprising CF3CH2CH2CI (253fb) in the liquid phase in a first reactor, using HF as the fluorinating agent; and (b)(i) dehydrohalogenating 253fb to produce 1243zf in the vapour phase in the present of a catalyst in a second reactor; or (b)(ii) dehydrohalogenating 253fb to produce 1243zf in a second reactor, wherein the reaction product comprising 253fb produced in step (a) has subjected to one or more purification steps before step (b). The present invention also provides an azeotropic or near-azeotropic composition comprising HF and 253fb.
A process for preparing 3,3,3-trifluoropropene (1243zf ), the process comprising:
A process for preparing 3,3,3-trifluoropropene (1243zf), the process comprising:
An azeotropic or near-azeotropic composition comprising HF and 253fb.
An azeotropic or near-azeotropic composition consisting of HF and 253fb.
A composition that is azeotropic at 70° C. and 600 kPa, which consisting of about 75 mol % HF and about 25 mol % 253fb.
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Dependencies are inferred from the claim text.