Heat transfer compositions

Patent metadata

Field	Value
Publication number	US-12018203-B2
Application number	US-202017429086-A
Country	US
Kind code	B2
Filing date	Feb 11, 2020
Priority date	Feb 11, 2019
Publication date	Jun 25, 2024
Grant date	Jun 25, 2024

Abstract

According to the present invention, there is provided a composition comprising 1,1-difluoroethylene (R-1132a), difluoromethane (R-32), 2,3,3,3-tetrafluoropropene (R-1234yf) and carbo dioxide (CO 2 , R-744). The invention also provides a composition R-1132a, R-32, R-1234yf and at least one compound selected from the group consisting of: pentafluoroethane (R-125), 1,1-difluoroethane (R-152a), 1,1,1,2-tetrafluoroethane (R-134a), trans-1,3,3,3-tetrafluoropropene (R-1234ze(E)) and 1,1,1,2,3,3,3-heptafluoropropane (R-227ea); optionally, the composition comprises at least one further compound selected from the group consisting of trifluoroethylene (R-1123), propane (R-290), propylene (R-1270), isobutane (R-600a) and carbon dioxide (CO 2 , R-744). The present invention also provides a composition comprising R-1132a, R-32 and R-1234yf.

First claim

The invention claimed is:

1. A composition comprising:
(a) from about 2 to about 15 weight % of 1,1-difluoroethene (R-1132a);
(b) from about 20 to about 60 weight % of difluoromethane (R-32);
(c) from about 25 to about 70 weight % of 2,3,3,3-tetrafluoropropene (R-1234yf); and
(d) from about 2 to about 12 weight % of carbon dioxide (CO 2 , R-744);
based on the total weight of the composition.

2. A composition according to claim 1 , wherein the composition comprises:
(a) from about 4 to about 10 weight % of R-1132a;
(b) from about 30 to about 48 weight % of R-32;
(c) from about 34 to about 64 weight % of R-1234yf; and
(d) from about 2 to about 8 weight % of CO 2 ;
based on the total weight of the composition.

3. A composition according to claim 1 , wherein the composition comprises from about 5 to about 10 weight % of R-1132a based on the total weight of the composition.

4. A composition according to claim 1 , wherein the composition comprises from about 5 to about 8 weight % of R-1132a based on the total weight of the composition.

5. A composition according to claim 1 , wherein the composition comprises from about 32 to about 44 weight % of R-32 based on the total weight of the composition.

6. A composition according to claim 1 , wherein the composition comprises from about 36 to about 40 weight % of R-32 based on the total weight of the composition.

7. A composition according to claim 1 , wherein the composition comprises from about 34 to about 60 weight % of R-1234yf based on the total weight of the composition.

8. A composition according to claim 1 , wherein the composition comprises from about 43 to about 54 weight % of R-1234yf based on the total weight of the composition.

9. A composition according to claim 1 , wherein the composition comprises from about 2 to about 7 weight % of CO 2 based on the total weight of the composition.

10. A composition according to claim 1 , wherein the composition comprises from about 3 to about 6 weight % of CO 2 based on the total weight of the composition.

11. A composition according to claim 1 , wherein the composition comprises:
about 6 weight % R-1132a, about 40 weight % R-32, about 51 weight % R-1234yf and about 3 weight % CO 2 ;
about 7 weight % R-1132a, about 36 weight % R-32, about 54 weight % R-1234yf and about 3 weight % CO 2 ;
about 9 weight % R-1132a, about 44 weight % R-32, about 43 weight % R-1234yf and about 4 weight % CO 2 ; or
about 7 weight % R-1132a, about 30 weight % R-32, about 60 weight % R-1234yf and about 3 weight % CO 2 ;
based on the total weight of the composition.

12. A composition according to claim 1 , wherein the manufacturing tolerances are +1/−0.5 weight % CO 2 ; +0.5/−1 weight % R-1132a; ±1 weight % R-32; and ±2 weight % R-1234yf.

13. A composition according to claim 1 , wherein the Worst-Case Formulation for Flammability (WCFF) of the composition in accordance with ASHRAE Standard 34 Appendix B has a molar volume concentration of R-1132a which is less than about 35% v/v or less than about 30% v/v based on the total volume of the composition.

14. A composition according to claim 1 consisting essentially of the stated components.

15. A composition according to claim 1 , wherein the composition is less flammable than R-1132a alone, wherein the composition has:
a. a higher flammable limit
b. a higher ignition energy; and/or
c. a lower flame velocity

compared to R-1132a alone.

16. A composition according to claim 1 wherein the composition is non-flammable, wherein the composition is non-flammable from at ambient temperature, up to wherein the composition is non-flammable at 60° C.

17. A composition according to claim 1 , wherein the composition has a temperature glide in an evaporator or condenser of less than about 15K, less than about 10K, or less than about 6K.

18. A composition according to claim 1 wherein the composition has a volumetric refrigeration capacity which is within about 15% of that of R-410A, or within about 10% of R-410A.

19. A composition according to claim 1 , wherein the operating condenser pressure in a condenser containing the composition is within about 10% of that of the condenser containing R-410A, or within about 5%.

20. A composition according to claim 1 , wherein the operating condenser pressure in a condenser containing the composition is lower than that of the condenser containing R-410A.

21. A composition according to claim 1 , wherein the composition has a Global Warming Potential (GWP) of less than about 300, or less than about 280.

22. A composition according to claim 1 wherein the composition has a burning velocity of less than about 10 cm/s as measured by ASHRAE Standard 34.

23. A composition comprising a lubricant and a composition according to claim 1 , optionally wherein the lubricant is selected from mineral oil, silicone oil, polyalkyl benzenes (PABs), polyol esters (POEs), polyalkylene glycols (PAGs), polyalkylene glycol esters (PAG esters), polyvinyl ethers (PVEs), poly alpha-olefins and combinations thereof, or wherein the lubricant is selected from PAGs or POEs.

24. A composition comprising a stabiliser and a composition according to claim 1 , optionally wherein the stabiliser is selected from diene-based compounds, phosphates, phenol compounds and epoxides, and mixtures thereof.

25. A composition comprising a flame retardant and a composition according to claim 1 , optionally wherein the flame retardant is selected from the group consisting of tri-(2-chloroethyl)-phosphate, (chloropropyl) phosphate, tri-(2,3-dibromopropyl)-phosphate, tri-(1,3-dichloropropyl)-phosphate, diammonium phosphate, various halogenated aromatic compounds, antimony oxide, aluminium trihydrate, polyvinyl chloride, a fluorinated iodocarbon, a fluorinated bromocarbon, trifluoro iodomethane, perfluoroalkyl amines, bromo-fluoroalkyl amines and mixtures thereof.

26. A heat transfer device containing a composition as defined in claim 1 , wherein the heat transfer device comprises a refrigeration device, a residential or commercial air conditioning system, a heat pump or a commercial or industrial refrigeration system.

27. A sprayable composition comprising material to be sprayed and a propellant comprising a composition as defined in claim 1 .

28. A method for cooling an article which comprises condensing a composition defined in claim 1 and thereafter evaporating the composition in the vicinity of the article to be cooled.

29. A method for heating an article which comprises condensing a composition as defined in claim 1 in the vicinity of the article to be heated and thereafter evaporating the composition.

30. A method for extracting a substance from biomass comprising contacting biomass with a solvent comprising a composition as defined in claim 1 and separating the substance from the solvent.

31. A method of cleaning an article comprising contacting the article with a solvent comprising a composition as defined in claim 1 .

32. A method of extracting a material from an aqueous solution or from a particulate solid matrix comprising contacting the aqueous solution or the particulate solid matrix with a solvent comprising a composition as defined in claim 1 and separating the material from the solvent.

33. A mechanical power generation devic

Assignees

• Mexichem Fluor Sa De Cv

Inventors

• Low Robert

Classifications

• C09K2205/22

  All components of a mixture being fluoro compounds · CPC title

• F25B45/00

  Arrangements for charging or discharging refrigerant · CPC title

• C11D7/5018

  Halogenated solvents · CPC title

• C11D7/30

  Halogenated hydrocarbons · CPC title

• C11D7/241

  linear · CPC title