Compositions

Patent metadata

Field	Value
Publication number	US-11560502-B2
Application number	US-202117352775-A
Country	US
Kind code	B2
Filing date	Jun 21, 2021
Priority date	Jan 30, 2015
Publication date	Jan 24, 2023
Grant date	Jan 24, 2023

Abstract

The present invention provides a composition, such as a refrigerant composition comprising 1,1-difluoroethene (vinylidene fluoride, R-1132a); trifluoromethane (R-23); and one or more compound selected from hexafluoroethane (R-116), ethane (R-170) and carbon dioxide (R-744, CO 2 ).

First claim

The invention claimed is:

1. A refrigeration system comprising a composition, the composition comprising:
i) 1,1-difluoroethene (vinylidene fluoride, R-1132a);
ii) trifluoromethane (R-23); and
iii) one or more compound selected from hexafluoroethane (R-116) and ethane (R-170); and
iv) about 4% to about 8% of dioxide (R-744, CO 2 ).

2. The refrigeration system of claim 1 , wherein the composition comprises from about 1 to about 98% by weight R-1132a.

3. The refrigeration system of claim 1 , wherein the composition comprises from about 1 to about 98% by weight R-23.

4. The refrigeration system of claim 3 , wherein the composition comprises about 20 to about 60% by weight R-23.

5. The refrigeration system of claim 1 , wherein the composition comprises up to about 80% by weight R-116.

6. The refrigeration system of claim 1 , wherein the composition comprises
from about 1 to about 40% by weight R-116, from about 5 to about 98% by weight R-1132a and from about 5 to about 98% by weight R-23; or
from about 1 to about 30% by weight R-116, from about 20 to about 90% by weight R-1132a and from about 5 to about 95% by weight R-23; or
from about 1 to about 25% by weight R-116, from about 30 to about 80% by weight R-1132a and from about 5 to about 90% by weight R-23.

7. The refrigeration system of claim 1 , wherein the composition comprises up to about 40% by weight R-170.

8. The refrigeration system of claim 1 , wherein the refrigeration system cools a compartment to less than −70° C.

9. The refrigeration system of claim 1 , wherein the composition is less flammable than R-1132a alone.

10. The refrigeration system of claim 1 , further comprising a lubricant selected from the group consisting of 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.

11. The refrigeration system of claim 1 , further comprising a stabiliser selected from the group consisting of diene-based compounds, phosphates, phenol compounds, epoxides, and mixtures thereof.

12. The refrigeration system of claim 1 , further comprising a flame retardant selected from the group consisting of tri-(2-chloroethyl)-phosphate, (chloropropyl) phosphate, tri-(2,3-dibromopropyl)-phosphate, tri-(1,3-dichloropropyl)-phosphate, diammonium phosphate, antimony oxide, aluminium trihydrate, polyvinyl chloride, a fluorinated iodocarbon, a fluorinated bromocarbon, trifluoro iodomethane, perfluoroalkyl amines, bromo-fluoroalkyl amines, and mixtures thereof.

13. A heat transfer device containing a composition, the composition comprising:
i) 1,1-difluoroethene (vinylidene fluoride, R-1132a);
ii) trifluoromethane (R-23); and
iii) one or more compound selected from hexafluoroethane (R-116) and ethane (R-170); and
iv) about 4% to about 8% of dioxide (R-744, CO 2 ).

14. The heat transfer device of claim 13 , wherein the heat transfer device is a refrigeration device selected from an ultra-low temperature refrigeration system and a cascade system.

15. A method for reducing the environmental impact arising from the operation of a product comprising an existing compound or composition, the method comprising replacing at least partially the existing compound or composition with a composition comprising:
i) 1,1-difluoroethene (vinylidene fluoride, R-1132a);
ii) trifluoromethane (R-23); and
iii) one or more compound selected from hexafluoroethane (R-116) and ethane (R-170); and
iv) about 4% to about 8% of dioxide (R-744, CO 2 ).

16. The method of claim 15 wherein the product is selected from a heat transfer device, a sprayable composition, a solvent or a mechanical power generation device.

17. The method of claim 15 wherein the product is an ultra-low temperature refrigeration system, optionally wherein the existing compound or composition is selected from R-508A, R-508B, R-23 and R-1361.

Assignees

• Mexichem Fluor Sa De Cv

Inventors

• Low Robert E
• Sharratt Andrew

Classifications

• C09K2205/40

  Replacement mixtures · CPC title

• C11D7/50

  Solvents · CPC title

• C09K3/30

  for aerosols (aerosol containers B65D83/14) · CPC title

• C11D7/505

  Mixtures of (hydro)fluorocarbons · CPC title

• C09K5/045 Primary

  containing only fluorine as halogen · CPC title