Compositions comprising tetrafluoropropene and methods of use thereof

Patent metadata

Field	Value
Publication number	US-9932507-B2
Application number	US-201715610479-A
Country	US
Kind code	B2
Filing date	May 31, 2017
Priority date	Aug 26, 2011
Publication date	Apr 3, 2018
Grant date	Apr 3, 2018

Abstract

The present invention relates to a composition comprising HFO-1234yf, or trans-HFO-1234ze, or a mixture thereof; HFC-32; and HFC-152a, HFO-1243zf, or a mixture thereof, wherein said composition is selected from the group consisting of:
(I) a first composition, wherein said HFO-1234yf or trans-HFO-1234ze or a mixture thereof is at least 56 weight percent of said first composition; (II) a second composition, wherein said HFC-32 is at most 29 weight percent of said second composition; (III) a third composition, wherein said HFC-152a is at least 56 weight percent said third composition; (IV) a fourth composition, wherein said HFC-32 is at least 56 weight percent of said fourth composition; (V) a fifth composition comprising trans-HFO-1234ze, HFC-32, and HFC-152a, HFO-1243zf, or a mixture thereof; and (VI) a sixth composition, wherein said HFO-1243zf or mixture thereof with HFC-152a is at most 20 weight percent of said sixth composition.

First claim

What is claimed is:

1. A composition consisting essentially of a refrigerant consisting of about 70 weight percent HFO-1234yf, about 18 weight percent HFC-32 and about 12 weight percent HFC-152a; and optionally at least one lubricant selected from the group consisting of mineral oils, alkylbenzenes, synthetic paraffins, synthetic naphthenes, poly alpha olefins, polyalkylene glycols, dibasic acid esters, polyesters, neopentyl esters, polyvinyl ethers, silicones, silicate esters, fluorinated compounds, phosphate esters and mixtures thereof; and optionally at least one additive selected from the group consisting of UV dyes, solubilizing agents, compatibilizers, stabilizers, tracers, perfluoropolyether, anti-wear agents, extreme pressure agents, corrosion and oxidation inhibitors, metal surface energy reducers, metal surface deactivators, free radical scavengers, foam control agents, viscosity index improvers, pour point depressants, detergents, viscosity adjusters, and mixtures thereof.

2. The composition as recited in claim 1 , wherein said composition has a cooling capacity in the range of from about 75% to about 130% of at least one existing refrigerant.

3. The composition as recited in claim 2 , wherein said existing refrigerant is selected from the group consisting of R-22, HFC-134a, R-404A, and R-407C.

4. The composition as recited in claim 3 , wherein the flammability of said composition is classified at most as 2L.

5. The composition as recited in claim 2 , wherein the GWP of said composition is less than the GWP of at least one refrigerant selected from the group consisting of R-134a, R-22, R-407C, and R-404A.

6. A process to produce cooling comprising condensing the composition of claim 1 and thereafter evaporating said composition in the vicinity of a body to be cooled.

7. A process to produce heat comprising condensing the composition of claim 1 in the vicinity of a body to be heated and thereafter evaporating said composition.

8. A method for replacing existing refrigerants, in a system designed to use said existing refrigerants, respectively, wherein said method comprises providing the composition of claim 1 to said system.

9. The method as recited in claim 7 , wherein said existing refrigerants are selected from R-22, R-404A, R-407C, and R-134a.

10. A refrigeration, air-conditioning or heat pump apparatus containing the composition of claim 1 .

11. A stationary air conditioning apparatus containing the composition of claim 1 .

12. A stationary refrigeration system containing the composition of claim 1 .

13. A process for recovering heat which comprises: (a) passing a working fluid comprising a composition of claim 1 through a first heat exchanger in communication with a process which produces heat; (b) removing said working fluid from said first heat exchanger; (c) passing said working fluid to a device that produces mechanical energy; and (d) passing said working fluid to a second heat exchanger.

14. An automotive air conditioner or heat pump containing the composition of claim 1 .

15. A method for replacing R-22, R-404A, R-407C, or R-134a, in a system designed to use R-22, R-404A, R-407C, or R-134a, respectively, wherein said method comprises providing the composition of claim 1 to said system.

Assignees

• Chemours Co Fc Llc

Inventors

• Minor Barbara Haviland
• Gerstel Joachim

Classifications

• C10M171/008

  Lubricant compositions compatible with refrigerants · CPC title

• C09K2205/43

  Type R22 · CPC title

• C09K2205/22

  All components of a mixture being fluoro compounds · CPC title

• C09K2205/126

  Unsaturated fluorinated hydrocarbons · CPC title

• C09K3/30

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