Method for purifying 1,1,1,2,3,3-hexafluoropropane
AssigneeArkema France
InventorsKevin HISLER, Jérémy RETALI, Pierre-Marie SEDAT, Géraldine CAVALLINI
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Abstract
The present invention relates to a process for purifying 1,1,1,2,3,3-hexafluoropropane from a mixture comprising 1,1,1,2,3,3-hexafluoropropane and at least one contaminant selected from the group consisting of hydrogen, nitrogen and oxygen, said process 5 comprising a step (a) of bringing said mixture into contact with a membrane in order to form a flow comprising said 1,1,1,2,3,3-hexafluoropropane and a flow comprising said at least one contaminant.
Claims15
A process for purifying 1,1,1,2,3,3-hexafluoropropane from a mixture comprising 1,1,1,2,3,3-hexafluoropropane and hydrogen, said process comprising a step (a) of bringing said mixture into contact with a membrane M1 in order to form a flow F1 comprising said 1,1,1,2,3,3-hexafluoropropane and a flow F2 comprising hydrogen, characterized in that said membrane M1 is made of a material selected from the group consisting of polyolefin, polyether, polyimide, polyvinylidene fluoride, a cellulose-based material and poly(methyl methacrylate).
A process for purifying 1,1,1,2,3,3-hexafluoropropane from a mixture comprising 1,1,1,2,3,3-hexafluoropropane and at least one contaminant selected from the group consisting of nitrogen and oxygen or a mixture thereof, said process comprising a step (a) of bringing said mixture into contact with a membrane M1′ in order to form a flow F1′ comprising said 1,1,1,2,3,3-hexafluoropropane and a flow F2′ comprising said at least one contaminant.
A process for purifying 1,1,1,2,3,3-hexafluoropropane from a mixture comprising 1,1,1,2,3,3-hexafluoropropane, nitrogen, hydrogen and optionally oxygen, said process comprising a step (a) of bringing said mixture into contact with a membrane M2 in order to form a flow F3 comprising said 1,1,1,2,3,3-hexafluoropropane and a flow F4 comprising nitrogen, hydrogen and optionally oxygen, said membrane M2 being made of a material selected from the group consisting of polyethylene, polypropylene, polymethylpentene, poly[oxy(2,6-dimethyl-1,4-phenylene)] and poly(phenylene oxide).
Dependencies are inferred from the claim text.