Preparation of an improved composition from 1-chloro-3,3,3-trifluoropropene (hfo-1233zd) high boiling residue by-product
AssigneeSolstice Advanced Materials US, Inc.
InventorsGustavo Cerri, Jinhua Yao
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Abstract
High boiling fluorinated by-products obtained from a manufacturing process of 1-chloro-3,3,3-trifluoropropene (HFO-1233zd) not only include components that can be used as a starting material or feedstock in the production of 1,1,1,3,3-pentafluoropropane (HFC-245fa), but also contain impurities that can be detrimental in the HFC-245fa process. A method of providing an improved composition from the high boiling by-products obtained from an HFO-1233zd manufacturing process reduces these impurities. The improved composition can be used as a starting material or feedstock for the production of HFC-245fa.
Claims20
A composition useful as a feedstock for the production of HFC-245fa, comprising:
- at least one compound selected from the group consisting of isomers of 1,1,3,3-tetrachloro-1-fluoropropane (HCFC-241fa), isomers of 1,3,3-trichloro-1,1-difluoropropane (HCFC-242), isomers of 3,3-dichloro-1,1,1-trifluoropropane (HCFC-243), and isomers of 3-chloro-1,1,1,3-tetrafluoropropane (HCFC-244), wherein the foregoing compounds in the aggregate amount to 50 wt. % or greater, based on a total weight of the composition;
- and
- at least one very high boiling component, wherein all very high boiling components are present in an aggregate amount of 1 wt. % or less, based on a total weight of the composition.
A method for producing a composition useful as a feedstock for the production of HFC-245fa, comprising:
- at least partially condensing a composition comprising at least one compound selected form the group consisting of isomers of 1,1,3,3-tetrachloro-1-fluoropropane (HCFC-241fa), isomers of 1,3,3-trichloro-1,1-difluoropropane (HCFC-242), isomers of 3,3-dichloro-1,1,1-trifluoropropane (HCFC-243), isomers of 3-chloro-1,1,1,3-tetrafluoropropane (HCFC-244) and at least one very high boiling component to form:
- a vaporized stream comprising the at least one compound selected from the group consisting of isomers of 1,1,3,3-tetrachloro-1-fluoropropane (HCFC-241fa), isomers of 1,3,3-trichloro-1,1-difluoropropane (HCFC-242), isomers of 3,3-dichloro-1,1,1-trifluoropropane (HCFC-243), isomers of 3-chloro-1,1,1,3-tetrafluoropropane (HCFC-244);
- and
- a liquid stream comprising the at least one very high boiling component;
- separating the vaporized stream from the liquid stream;
- and
- optionally feeding the vaporized stream to an HFC-245 reactor.
A method for producing a composition useful as a feedstock for the production of HFC-245fa, comprising:
- distilling a composition comprising at least one compound selected from the group consisting of isomers of 1,1,3,3-tetrachloro-1-fluoropropane (HCFC-241fa), isomers of 1,3,3-trichloro-1,1-difluoropropane (HCFC-242), isomers of 3,3-dichloro-1,1,1-trifluoropropane (HCFC-243), isomers of 3-chloro-1,1,1,3-tetrafluoropropane (HCFC-244), and very high-boiling components to produce a distillate stream and a very high boiling components stream;
- and
- optionally feeding the distillate stream to an HFC-245 reactor.
Dependencies are inferred from the claim text.