Methods for removing halogenated ethylene impurities in 2,3,3,3-tetrafluoropropene product
AssigneeHoneywell International Inc.
InventorsHaiyou WANG, Hsueh Sung TUNG
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Abstract
The present process relates to a process comprising: contacting a mixture comprising 2,3,3,3-tetrafluoropropene and at least one halogenated ethylene impurity with at least one adsorbent or at least one chemisorption catalyst to reduce the concentration of said at least one halogenated ethylene impurity.
Claims33
A process for removing at least one halogenated ethylene impurity from a fluoroolefin mixture comprised of at least one compound selected from 2,3,3,3-tetrafluoropropene, 1,3,3,3-tetrafluoro-1-propene and 1-chloro-3,3,3-trifluoropropene and said halogenated ethylene impurity, said process comprising:
- contacting said mixture comprised of said fluoroolefin and at least one halogenated ethylene impurity with at least one adsorbent or at least one chemisorption catalyst to reduce the concentration of said at least one halogenated ethylene impurity.
A process comprising:
- (a) dehydrochlorinating 2-chloro-1,1,1,2-tetrafluoropropane to form a mixture comprising 2,3,3,3-tetrafluoropropene and at least one halogenated ethylene impurity;
- (b) contacting a mixture comprising 2,3,3,3-tetrafluoropropene and at least one halogenated ethylene impurity with at least one adsorbent or at least one chemisorption catalyst to reduce the concentration of said at least one halogenated ethylene impurity;
- and
- (c) recovering 2,3,3,3-tetrafluoropropene having reduced concentration of said halogenated ethylene impurity.
A process for preparing 2,3,3,3-tetrafluoropropene comprising:
- (i) providing a starting composition comprising a compound of Formulae I, II, or III:
- CX2═CCl—CH2X (I);
- CX3—CCl═CH2 (II);
- or
- CX3—CHCl—CH2X (III)
- wherein X is independently selected from F, Cl, Br, and I, provided that at least one X is not fluorine;
- (ii) contacting the starting composition with a first fluorinating agent to produce a first intermediate composition comprising 2-chloro-3,3,3-trifluoropropene and a first chlorine-containing byproduct;
- (iii) contacting the first intermediate composition with a second fluorinating agent to produce a second intermediate composition comprising 2-chloro-1,1,1,2-tetrafluoropropane;
- (iv) dehydrochlorinating a portion of the second intermediate composition comprising 2-chloro-1,1,1,2-tetrafluoropropane to produce a reaction product comprising a mixture of 2,3,3,3-tetrafluoropropene and halogenated ethylene;
- (v) contacting said mixture comprising 2,3,3,3-tetrafluoropropene and at least one halogenated ethylene impurity with at least one adsorbent or at least one chemisorption catalyst to reduce the concentration of said at least one halogenated ethylene impurity;
- and
- recovering 2,3,3,3-tetrafluoropropene having reduced concentration of said halogenated ethylene impurity.
A process for removing at least one halogenated ethylene impurity from a fluoroolefin mixture comprised of at least one compound selected from 2,3,3,3-tetrafluoropropene and said halogenated ethylene impurity, said process comprising:
- contacting said mixture comprised of said fluoroolefin and at least one halogenated ethylene impurity with at least one adsorbent or at least one chemisorption catalyst to reduce the concentration of said at least one halogenated ethylene impurity.
A process for removing at least one halogenated ethylene impurity from a fluoroolefin mixture comprised of 1-chloro-3,3,3-trifluoropropene, and said halogenated ethylene impurity, said process comprising:
- contacting said mixture comprised of said fluoroolefin and at least one halogenated ethylene impurity with at least one adsorbent or at least one chemisorption catalyst to reduce the concentration of said at least one halogenated ethylene impurity.
A process for removing at least one halogenated ethylene impurity from a fluoroolefin mixture comprised of 1,3,3,3-tetrafluoro-1-propene, and said halogenated ethylene impurity, said process comprising:
- contacting said mixture comprised of said fluoroolefin and at least one halogenated ethylene impurity with at least one adsorbent or at least one chemisorption catalyst to reduce the concentration of said at least one halogenated ethylene impurity.
Dependencies are inferred from the claim text.