Azeotrope-like compositions of tetrafluoropropene and hydrofluorocarbons

Patent metadata

Field	Value
Publication number	US-9657208-B2
Application number	US-201414538335-A
Country	US
Kind code	B2
Filing date	Nov 11, 2014
Priority date	Oct 27, 2003
Publication date	May 23, 2017
Grant date	May 23, 2017

Abstract

Provided are azeotrope-like compositions comprising tetrafluoropropene and hydrofluorocarbons and uses thereof, including use in refrigerant compositions, refrigeration systems, blowing agent compositions, and aerosol propellants.

First claim

What is claimed is:

1. An azeotrope-like composition consisting essentially of (a) trans-1,3,3,3-tetrafluoropropene (transHFO-1234ze) and (b) 1,1-difluoroethane (“HFC-152a”), said HFC-152a being present in the azeotrope-like composition in a range of from about 50 wt % to less than 100 wt %, wherein said composition includes a minimum boiling azeotrope having a liquid composition component concentration equal to the vapor composition component concentration, whereby at a pressure of about 14.4 psia said azeotrope-like composition has a boiling point of −23° C. +/−2° C.

2. A heat transfer composition comprising the azeotrope-like composition of claim 1 .

3. The heat transfer composition of claim 2 wherein said azeotrope-like composition has a boiling point of from about −23° C. +/−1° C. at a pressure of about 14.4 psia.

4. A refrigeration system comprising the heat transfer composition of claim 2 .

5. An air conditioning system comprising the heat transfer composition of claim 2 .

6. A refrigeration system originally designed for use with HFC-134a and comprising the heat transfer composition of claim 2 .

7. The heat transfer composition of claim 2 wherein said heat transfer composition is non-flammable.

8. The heat transfer composition of claim 7 further comprising a lubricant.

9. An azeotrope-like composition consisting essentially of (a) trans-1,3,3,3-tetrafluoropropene (transHFO-1234ze) and (b) 1,1,1,2,2-pentafluoroethane (“HFC-125”), said HFC-125 being present in the azeotrope-like composition in a range of from about 60 wt % to less than about 99 wt %, wherein said composition range includes a minimum boiling azeotrope having a liquid composition component concentration equal to the vapor composition component concentration, whereby at a pressure of about 14.4 psia said azeotrope-like composition has a boiling point of −47° C. +/−2° C.

10. A heat transfer composition comprising the azeotrope-like composition of claim 9 .

11. A refrigeration system comprising the heat transfer composition of claim 10 .

12. The heat transfer composition of claim 11 wherein said heat transfer composition is non-flammable.

Assignees

• Honeywell Int Inc

Inventors

• Singh Rajiv R
• Pham Hang T
• Knopeck Gary M

Classifications

• A01N29/02

  Acyclic compounds or compounds containing halogen attached to an aliphatic side-chain of a cycloaliphatic ring system · CPC title

• C08J9/146

  only fluorine as halogen atoms · CPC title

• C11D7/5018

  Halogenated solvents · CPC title

• F25B1/00

  Compression machines, plants or systems with non-reversible cycle (F25B3/00, F25B5/00, F25B6/00, F25B7/00, F25B9/00 take precedence) · CPC title

• C09K5/048

  Boiling liquids as heat transfer materials · CPC title