Mexichem Fluor S.a. De C.v.

Mexican Fluor S.a. De C.v.

Emma Jayne Hodgson

James Henry Murray

Gary Lloyd

Clive Robert Giddis

Clare Mary Skae

Claire McGuinness

Claire Elizabeth McGuinness

The present invention provides a process for preparing 3,3,3-trifluoropropene (1243zf), the process comprising: The present invention also provides an azeotropic or near-azeotropic composition comprising HF and 253fb.

Process for the preparation of 3,3,3-trifluoropropene

The present invention provides a process for preparing 3,3,3-trifluoropropene (1243zf), the process comprising: (a)fluorinating CClCHCHCI (250fb) to produce a reaction product comprising CFCHCHCI (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 presence 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.

The present invention provides a method for purifying a fluid comprising a first drying stage which comprises contacting a first fluid stream comprising one or more hydro(chloro)fluoroolefins and water with a source of sulphuric acid to produce a first treated fluid stream comprising the hydro(chloro)fluoroolefin(s) and a first spent sulphuric acid stream, wherein the first treated fluid stream comprises a lower concentration of water than the first fluid stream.

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Cheshire, United Kingdom

Emma Jayne Hodgson