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US 9,309,450 B2Granted
Heat transfer compositions
AssigneeMexichem Amanco Holding S.A. de C.V.
InventorRobert E. Low
Life of this patent
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Abstract
The invention provides a heat transfer composition comprising (i) a first component selected from trans-1,3,3,3-tetrafluoropropene (R-1234ze(E)), cis-1,3,3,3-tetrafluoropropene (R-1234ze(Z)) and mixtures thereof; (ii) carbon dioxide (R-744); and (iii) a third component selected from 2,3,3,3-tetrafluoropropene (R-1234yf), 3,3,3-trifluoropropene (R-1243zf), and mixtures thereof.
Claims55
A heat transfer composition consisting essentially of:
- (i) a first component selected from about 10 to about 95% by weight R-1234ze(E);
- (ii) from about 2 to about 30% by weight R-744;
- and
- (iii) from about 3 to about 60% by weight of a third component selected from R-1234yf or R-1243zf;
- wherein the composition has a critical temperature of 70° C. or greater.
2 more elements
Dependencies are inferred from the claim text.