Stable 2,3,3,3-tetrafluoropropene composition

1. A composition comprising a refrigerant comprising from 99.8 to 99.98 wt.% of 2,3,3,3-tetrafluoropropene, from 0.02 to 0.2 wt. % of 3,3,3-trifluoropropene (HFO 1243zf) and at least one positional isomer of 2,3,3,3-tetrafluoropropene selected from the group consisting of 1,3,3,3-tetrafluoropropene (Z and E isomers) and 1,1,2,3-tetrafluoropropene, and optionally at most 500 ppm of 3,3,3-trifluoropropyne and/or at most 200 ppm of 1,1,1,2,3-pentafluoropropene (HFO-1225ye).

2. The composition according to claim 1 , wherein the refrigerant further comprises at least one of the compounds (lb) chosen from 1,1,1,2-tetrafluoropropane (HFC-254eb), 1,1,1,2,3-pentafluoropropane (HFC-245eb), 1,1,1,2-tetrafluoroethane (HFC-134a), 1,1,2-trifluoroethane (HFC-143), 1,1,1,2,3,3-hexafluoropropane, hexafluoropropene, cyclohexafluoropropene, and 1,1,1,3,3-pentafluoropropene (HFO-1225zc).

3. The composition according to claim 2 , wherein the compound(s) (lb) represent(s) at most 500 ppm of the composition.

4. The composition according to claim 3 , wherein the compound(s) (lb) represent(s) at most 400 ppm of the composition.

5. The composition according to claim 1 , wherein the refrigerant comprises from 99.85 to 99.98 wt. % of 2,3,3,3-tetrafluoropropene, from 0.02 to 0.15 wt. % of 3,3,3-trifluoropropene (HFO-1243zf) and at least one positional isomer of 2,3,3,3-tetrafluoropropene, and optionally at most 250 ppm of 3,3,3-trifluoropropyne and/or at most 50 ppm of 1,1,1,2,3-pentafluoropropene (HFO-1225ye).

6. The composition according to claim 1 , wherein the refrigerant comprises from 99.9 to 99.98 wt. % of 2,3,3,3-tetrafluoropropene, from 0.02 to 0.1 wt. % of 3,3,3-trifluoropropene (HFO-1243zf) and at least one positional isomer of 2,3,3,3-tetrafluoropropene, and optionally at most 200 ppm of 3,3,3-trifluoropropyne and/or at most 5 ppm of 1,1,1,2,3-pentafluoropropene (HFO-1225ye).

7. The composition according to claim 1 , wherein the composition is used as a heat transfer agent in stationary or motor-vehicle air conditioning, refrigeration and heat pumps.

8. The composition according to claim 1 , wherein the composition further comprises a lubricant.

9. The composition according to claim 8 , wherein the lubricant is chosen from polyol esters (POEs), polyalkylene glycols (PAGs), polyalkylene glycol esters and polyvinyl ethers (PVEs).

10. The composition according to claim 1 , wherein the refrigerant comprises at most 500 ppm of 3,3,3-trifluoropropyne and/or at most 200 ppm of 1,1,1,2,3-pentafluoropropene (HFO-1225ye).

11. The composition according to claim 1 , wherein the refrigerant comprises at most 250 ppm of 3,3,3-trifluoropropyne and/or at most 50 ppm of 1,1,1,2,3-pentafluoropropene (HFO-1225ye).

12. The composition according to claim 1 , wherein the refrigerant comprises at most 200 ppm of 3,3,3-trifluoropropyne and/or at most 5 ppm of 1,1,1,2,3-pentafluoropropene (HFO-1225ye).

13. The composition according to claim 1 , wherein the refrigerant consists of from 99.8 to 99.98 wt. % of 2,3,3,3-tetrafluoropropene, from 0.02 to 0.2 wt. % of 3,3,3-trifluoropropene (HFO 1243zf) and at least one positional isomer of 2,3,3,3-tetrafluoropropene, and optionally at most 500 ppm of 3,3,3-trifluoropropyne and/or at most 200 ppm of 1,1,1,2,3-pentafluoropropene (HFO-1225ye).

14. The composition according to claim 1 , wherein the positional isomer of 2,3,3,3-tetrafluoropropene is the E isomer of 1,3,3,3-tetrafluoropropene.

15. A composition comprising a refrigerant comprising from 99.8 to 99.98 wt. % of 2,3,3,3-tetrafluoropropene and from 0.02 to 0.2 wt. % of 3,3,3-trifluoropropene (HFO 1243zf) and at least one positional isomer of 2 , 3 , 3 , 3 -tetrafluoropropene.

16. The composition according to claim 15 , wherein the refrigerant further comprises at least one of the compounds (lb) chosen from 1,1,1,2-tetrafluoropropane (HFC-254eb), 1,1,1,2,3-pentafluoropropane (HFC-245eb), 1,1,1,2-tetrafluoroethane (HFC-134a), 1,1,2-trifluoroethane (HFC-143), 1,1,1,2,3,3-hexafluoropropane, hexafluoropropene, cyclohexafluoropropene, and 1,1,1,3,3-pentafluoropropene (HFO-1225zc).

17. The composition according to claim 16 , wherein the compound(s) (lb) represent(s) at most 500 ppm of the composition.

18. The composition according to claim 17 , wherein the compound(s) (lb) represent(s) at most 400 ppm of the composition.

19. The composition according to claim 15 , wherein the composition is used as a heat transfer agent in stationary or motor-vehicle air conditioning, refrigeration and heat pumps.

20. The composition according to claim 15 , wherein the composition further comprises a lubricant.

21. The composition according to claim 20 , wherein the lubricant is chosen from polyol esters (POEs), polyalkylene glycols (PAGs), polyalkylene glycol esters and polyvinyl ethers (PVEs).

22. The composition according to claim 15 , wherein the refrigerant comprises at most 500 ppm of 3,3,3-trifluoropropyne and/or at most 200 ppm of 1,1,1,2,3-pentafluoropropene (HFO-1225ye).

23. The composition according to claim 15 , wherein the refrigerant comprises at most 250 ppm of 3,3,3-trifluoropropyne and/or at most 50 ppm of 1,1,1,2,3-pentafluoropropene (HFO-1225ye).

24. The composition according to claim 15 , wherein the refrigerant comprises at most 200 ppm of 3,3,3-trifluoropropyne and/or at most 5 ppm of 1,1,1,2,3-pentafluoropropene (HFO- 1225 ye).

25. The composition according to claim 15 , wherein the refrigerant comprises from 99.85 to 99.98 wt. % of 2,3,3,3-tetrafluoropropene, from 0.02 to 0.15 wt. % of 3,3,3-trifluoropropene (HFO-1243zf) and at least one positional isomer of 2 , 3 , 3 , 3 -tetrafluoropropene.

26. The composition according to claim 15 , wherein the refrigerant comprises from 99.9 to 99.98 wt. % of 2,3,3,3-tetrafluoropropene, from 0.02 to 0.1 wt. % of 3,3,3-trifluoropropene (HFO-1243zf) and at least one positional isomer of 2,3,3,3-tetrafluoropropene.