Process for drying hydro(chloro)fluoroolefins
AssigneeMexichem Fluor S.A. De C.V.
InventorsEmma Jayne Hodgson, James Henry Murray, Gary Lloyd
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Abstract
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.
Claims52
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 at a concentration between 75 wt % and 95 wt % 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.
A method comprising an integrated process for producing one or more hydro(chloro)fluoroolefins comprising:
- dehydrohalogenating one or more hydro(chloro)fluoroalkanes to form a crude product stream;
- subjecting the crude product stream to a first acid removal step comprising contacting the crude product stream with water or a source of aqueous acid to produce a treated product stream and a spent aqueous acid stream;
- subjecting the treated product stream to a second acid removal step comprising contacting the treated product stream with a source of aqueous alkali to produce a second treated product stream and a spent aqueous alkali stream;
- subjecting the second treated product stream, in the form of a first fluid stream, to a first drying stage comprising contacting the first fluid stream with a source of sulphuric acid at a concentration between 75 wt % and 95 wt % to produce a first treated fluid stream comprising the hydro(chloro)fluoroolefin(s) and a first spent sulphuric acid stream.
Dependencies are inferred from the claim text.