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US 12,292,213 B2Granted
HFO-1234ZE, HFO-1225ZC and HFO-1234YF compositions and processes for producing and using the compositions
AssigneeThe Chemours Company Fc, LLC
InventorsSheng Peng, Mario Joseph Nappa
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Abstract
A fluoropropene composition comprising Z-1,3,3,3-tetrafluoropropene, E-1,3,3,3-tetrafluoropropene, 1,1,3,3,3-pentafluoropropene, 2,3,3,3-tetrafluoropropene, and optionally 1,1,1,3,3-pentafluoropropane wherein the 2,3,3,3-tetrafluoropropene being present in an amount of 0.00001 to 1.0%. A method of producing the fluoropropene, methods for using the fluoropropene and the composition formed are also disclosed.
Claims21
A method of producing a fluoropropene of formula CF3CH═CHF (HFO-1234ze), the method comprising:
- (a) providing a starting feed mixture of 1,1,1,3,3-pentafluoropropane (HFC-245fa) and an amount of Z-1,3,3,3-tetrafluoropropene (Z-HFO-1234ze) sufficient to suppress formation of additional Z-HFO-1234ze in the gas phase;
- (b) contacting the starting feed mixture with a pretreated chromium oxide catalyst in a gas phase reactor and converting the HFC-245fa to a product mixture comprising at least about (i) E-HFO-1234ze and Z-HFO-1234ze, (ii) hydrogen fluoride (HF), (iii) at least one additional compound selected from the group consisting of HFO-1234yf, 3,3,3-trifluoropropyne (TFP), HFC-143a, HFC-152a, HCFO-1233xf, HCFO-1233zd(E), HFC-245cb, HFO-1243zf and HFO-1225zc (iv), optionally at least one additional compound selected from the group consisting of HFC-236fa, HFO-1225zc, E-HFO-1225ye, Z-HFO-1225ye, E-HFO-1234ye, Z-HFO-1234ye, HFO-1234zc, and (v) optionally an amount of unreacted HFC-245fa;
- (c) separating the E-HFO-1234ze from the Z-HFO-1234ze and any unreacted HFC-245fa, if present;
- and
- (d) recovering the E-HFO-1234ze.
2 more elements
A method comprising:
- (a) contacting a starting feed mixture of 1,1,1,3,3-pentafluoropropane (HFC-245fa) and Z-1,3,3,3-tetrafluoropropene (Z-HFO-1234ze) at a first level, in the gas phase with a catalyst comprising fluorinated Cr2O3, in the presence of an oxygen containing gas in a reactor, under conditions to facilitate isomeric selectivity to E-1,3,3,3-tetrafluoropropene (E-HFO-1234ze) and suppress formation of additional Z-HFO-1234ze and form a reactor product mixture, the reactor product mixture comprising (i) E-HFO-1234ze, (ii) Z-HFO-1234ze, (iii) hydrogen fluoride (HF), (iv) at least one additional compound selected from the group consisting of HFO-1234yf, 3,3,3-trifluoropropyne (TFP), HFC-143a, HFC-152a, HCFO-1233xf, HCFO-1233zd, (v) optionally at least one additional compound selected from the group consisting of HFC-236fa, HFO-1225zc, E-HFO-1225ye and Z-HFO-1225ye, E/Z-1,2,3,3-tetrafluoropropene (HFO-1234ye +HFO-1234ye), 3,3,1,1-tetrafluoropropene (HFO-1234zc), and (vi) optionally unreacted HFC-245fa;
- (b) separating the HF and then separating the E-HFO-1234ze from the Z-HFO-1234ze and any unreacted HFC-245fa, if present;
- (c) recovering the E-HFO-1234ze from (b);
- and
- (d) optionally operating one of a heat transfer system, foaming system, or blending system with the recovered E-HFO-1234ze of (c).
2 more elements
Dependencies are inferred from the claim text.