Compositions comprising Z-1,2-difluoroethylene and uses thereof
View Patent ↗The present invention relates to compositions for use in refrigeration, air-conditioning, and heat pump systems wherein the composition comprises Z-1,2-difluoroethylene (Z-HFO-1132a). The compositions of the present invention are useful in processes for producing cooling or heat, as heat transfer fluids, foam blowing agents, aerosol propellants, and power cycle working fluids.
1. A composition comprising Z-1,2-difluoroethylene and E-1,3,3,3-tetrafluoropropene.
2. The composition of claim 1 comprising about 1 weight percent to about 99 weight percent Z-1,2-difluoroethylene and about 99 weight percent to about 1 weight percent Z-1,3,3,3-tetrafluoropropene.
3. The composition of claim 1 comprising about 90.5 weight percent Z-1,2-difluoroethylene and about 9.5 weight percent E-1,3,3,3-tetrafluoropropene.
4. The composition of claim 1 further comprising at least one lubricant.
5. The compositions of claim 1 further comprising at least one flammability reducing additive.
6. The compositions of claim 1 further comprising at least one stabilizer.
7. A method of refrigeration, air-conditioning or heating comprising the steps of evaporating and condensing a composition of claim 1 , wherein said composition functions as a refrigerant.
8. A method of forming a foam comprising:
(a) adding to a foamable composition the composition of claim 1 ; and
(b) reacting the foamable composition under conditions effective to form a foam.
9. A process for producing aerosol products comprising the step of adding the composition of claim 1 to active ingredients in an aerosol container, wherein said composition functions as a propellant.
10. A process for recovering heat comprising evaporating a liquid phase working fluid comprising a composition of claim 1 in a heat exchanger in contact with a system that produces heat thus producing a vapor phase working fluid and passing said vapor phase working fluid to an expander wherein mechanical energy is produced.
11. The process of claim 10 further comprising condensing said vapor phase working fluid thus forming a liquid phase working fluid.
12. The process of claim 11 further comprising recycling said liquid phase working fluid to be evaporated again.
13. A refrigeration, air conditioning, heat pump or power cycle system apparatus containing the composition of claim 1 .
14. A method for replacing a refrigerant selected from the group consisting of R134a, R22, R12, R404A, R410A, R407C, R413A, R417A, R422A, R422B, R422C, R422D, R423A, R424A, R426A, R428A, R430A, R434A, R437A, R438A, R507A, and R502 in a heat transfer system that uses, used or was designed to use said refrigerant, comprising adding and replacing to said system a composition comprising Z-1,2-difluoroethylene and E-1,3,3,3-tetrafluoropropene.
15. The method of claim 14 wherein the system uses, used or was designed to use R134a.