Mexichem Fluor S.a. De C.v.

Mexican Fluor S.a. De C.v.

James Henry Murray

Clive Robert Giddis

Gary Lloyd

Emma Jayne Hodgson

Andrew Paul Sharratt

Clare Mary Skae

Claire McGuinness

Sheryl Louise Johnson

Stephen Andrew Flaherty

Claire Elizabeth McGuinness

Fiona Louise Smith

Jonathan Junhay Man

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

A method for preparing a tetrafluoro-1,2-epoxypropane comprising reacting a 3-acetoxy-2-bromo-tetrafluoropropane with an alkaline or alkaline earth metal hydroxide solution to provide a tetrafluoro-1,2-epoxypropane, and partially fluorinated polyethers of formula [OCRRCRR]wherein n is from 5 to 100, R is F or H, Ris CF, Ris F or H and Ris H.

Method for preparing a tetrafluoro-1,2-epoxypropane

A method for preparing atetrafluoro-1,2-epoxypropane comprising reacting a 2-bromo-tetrafluoropropan-3-ol with an alkaline or alkaline earth metal hydroxide solution, a compound which is 2,3,3,3-tetrafluoro-1,2-epoxypropane, and partially fluorinated polyethers of formula [OCRRCRR]wherein n is from 5 to 100, R is F or H, Ris CF, Ris F or H and Ris H.

The present invention provides an integrated process for preparing 2,3,3, 3-tetrafluoropropene (1234yf), the process comprising: (a) vapour phase catalytic fluorination of a first composition comprising 3,3,3-trifluoro-2-chloro-prop-1-ene (CF3C&#x2014;CNCH2, 1233xf) with hydrogen fluoride (HF) in a fluorination reactor to produce a fluorination product stream comprising 1,1,2,2-pentafluoropropane (245cb), HF and HCI; (b) vapour phase catalytic dehydrofluorination composition comprising 245cb in a dehydrofluorination reactor to produce a dehydrofluorination product stream comprising 1234yf and HF; wherein the fluorination product stream and the dehydrofluorination product stream are combined and subjected to (c) purification to produce a composition comprising 245cb and a 1234yf product stream.

Process for the preparation of 2,3,3,3-tetrafluoropropene (1234yf)

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

James Henry Murray