2,3,3,3-tetrafluoropropene compositions having improved miscibility

Patent metadata

Field	Value
Publication number	US-10377935-B2
Application number	US-201815997077-A
Country	US
Kind code	B2
Filing date	Jun 4, 2018
Priority date	Jul 11, 2013
Publication date	Aug 13, 2019
Grant date	Aug 13, 2019

Abstract

The use of an alcoholic compound to improve the miscibility of ammonia with 2,3,3,3-tetrafluoropropene, as well as to compositions of ammonia, 2,3,3,3-tetrafluoropropene and an alcoholic compound, and the use thereof, in particular in heat-transfer applications. A composition including 2,3,3,3-tetrafluoropropene, ammonia and an alcoholic compound having a melting point less than or equal to 0° C.

First claim

The invention claimed is:

1. A composition comprising 2,3,3,3-tetrafluoropropene, ammonia and an alcoholic compound having a melting point less than or equal to 0° C., wherein the alcoholic compound is present in a proportion from 0.5 to 20%, relative to the sum of the alcoholic compound, ammonia and 2,3,3,3-tetrafluoropropene.

2. The composition as claimed in claim 1 , wherein the alcoholic compound has a melting point less than or equal to −50° C.; and/or in that the alcoholic compound has a viscosity at 20° C. less than or equal to 32.5 mm 2 /s.

3. The composition as claimed in claim 1 , wherein the alcoholic compound is a primary alcohol of formula R 1 —CH 2 —OH, or a secondary alcohol of formula R 2 R 3 —CH—OH, or a tertiary alcohol of formula R 4 R 5 R 6 —C—OH, or an enol of formula R 7 R 8 C═CR 9 OH, or a phenol of formula R 10 —OH, the groups R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 and R 9 each representing independently a linear or branched alkyl group comprising from 1 to 20 carbon atoms, optionally substituted partially or completely with F, Br, Cl or OH; and R 10 represents a benzene ring optionally substituted partially or completely with F, Br, Cl, OH or with alkyl groups as defined above.

4. The composition as claimed in claim 1 , wherein the alcoholic compound is selected from propan-1-ol, propan-2-ol, 2-perfluorohexylethanol, 1,1,1,3,3,3-hexafluoropropan-2-ol and mixtures thereof.

5. The composition as claimed in claim 1 , comprising:
from 1 to 60% of ammonia and from 40 to 99% of 2,3,3,3-tetrafluoropropene; the proportions being given relative to the sum of ammonia and 2,3,3,3-tetrafluoropropene.

6. A method for heating or cooling a fluid or a body by means of a vapor compression circuit containing a heat transfer fluid, said method comprising successively at least partial evaporation of the heat transfer fluid, compression of the heat transfer fluid, at least partial condensation of the heat transfer fluid and expansion of the heat transfer fluid, wherein the heat transfer fluid is supplied by a composition as claimed in claim 1 .

7. The composition as claimed in claim 1 , consisting essentially of a mixture of ammonia, of 2,3,3,3-tetrafluoropropene and of the alcoholic compound.

8. The composition as claimed in claim 1 , having a demixing temperature less than or equal to −23° C.

9. The composition as claimed in claim 1 , further comprising one or more additives selected from lubricants, polyalkylene glycols, stabilizers, tracers, fluorescent agents, odoriferous agents, solubilizers and mixtures thereof.

10. A heat transfer composition comprising the composition as claimed in claim 1 .

11. A method for improving the miscibility of ammonia with 2,3,3,3-tetrafluoropropene, the method comprising adding an alcoholic compound, wherein the alcoholic compound is present in a proportion from 0.5 to 20%, relative to the sum of the alcoholic compound, ammonia and 2,3,3,3-tetrafluoropropene.

12. The method as claimed in claim 11 , wherein the alcoholic compound has a melting point less than or equal to 0° C.; and/or in that the alcoholic compound has a viscosity at 20° C. less than or equal to 32.5 mm 2 /s.

13. The method as claimed in claim 11 , wherein the alcoholic compound is a primary alcohol of formula R 1 —CH 2 —OH, or a secondary alcohol of formula R 2 R 3 —CH—OH, or a tertiary alcohol of formula R 4 R 5 R 6 —C—OH, or an enol of formula R 7 R 8 C═CR 9 OH, or a phenol of formula R 10 —OH, the groups R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 and R 9 each representing independently a linear or branched alkyl group comprising from 1 to 20 carbon atoms, optionally substituted partially or completely with F, Br, Cl or OH; and R 10 represents a benzene ring optionally substituted partially or completely with F, Br, Cl, OH or with alkyl groups as defined above.

14. The method as claimed in claim 11 , wherein the alcoholic compound is selected from propan-1-ol, propan-2-ol, 2-perfluorohexylethanol, 1,1,1,3,3,3-hexafluoropropan-2-ol and mixtures thereof.

15. The method as claimed in claim 11 , wherein ammonia and 2,3,3,3-tetrafluoroproene are combined in a mixture comprising:
from 1 to 60% of ammonia and from 40 to 99% of 2,3,3,3-tetrafluoropropene.

16. A method for reducing the environmental impact of a heat transfer installation comprising a vapor compression circuit containing an initial heat transfer fluid, said method comprising a step of replacing the initial heat transfer fluid in the vapor compression circuit with a final heat transfer fluid, the final heat transfer fluid having a lower GWP than the initial heat transfer fluid, wherein the final heat transfer fluid is supplied by a composition as claimed in claim 1 .

17. The method as claimed in claim 11 , wherein ammonia and 2,3,3,3-tetrafluoropropene are not combined with any third heat transfer compound.

18. A heat transfer installation comprising a vapor compression circuit containing a composition as claimed in claim 1 as heat transfer composition.

19. The installation as claimed in claim 18 , selected from mobile or stationary installations for heating by heat pump, air conditioning, refrigeration, freezing and the Rankine cycles, and automobile air conditioning installations.

20. The installation as claimed in claim 18 , which is an automobile air conditioning installation.

Assignees

• Arkema France

Inventors

• Guerin Sophie
• Rached Wissam

Classifications

• F25B2400/121

  using R1234 · CPC title

• C08J2203/184

  of chemical foaming agent and physical blowing agent, e.g. azodicarbonamide and fluorocarbon · CPC title

• C11D7/06

  Hydroxides · CPC title

• C08J2203/162

  Halogenated unsaturated hydrocarbons, e.g. H2C=CF2 · CPC title

• C09K2205/132

  containing nitrogen · CPC title