# US 9,039,923 B2 · Composition of zeotropic mixtures having predefined temperature glide

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- Number: US 9,039,923 B2
- Document ID: US9039923B2
- Status: Granted
- Kind: B2
- Application number: 13/396,102
- Filed: 2012-02-14
- Published: 2013-08-15
- Granted: 2015-05-26
- Earliest claimed: 2012-02-14
- Assignees: United Technologies Corporation
- Applicants: Ahmad M. Mahmoud; Jaeseon Lee; Dong Luo
- Inventors: Ahmad M. Mahmoud; Jaeseon Lee; Dong Luo
- Web page: https://patentgrep.com/patent/US9039923B2

## CPC

- C09K 5/045: {containing only fluorine as halogen}
- C09K 2205/108: Aldehydes or ketones
- C09K 2205/112: Halogenated ethers
- C09K 2205/12: Hydrocarbons
- C09K 2205/122: Halogenated hydrocarbons
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE

## Abstract

A composition of a zeotropic mixture has a first chemical constituent and at least one second, different chemical constituent. The zeoptropic mixture has a temperature glide of 5° C.-25° C. with regard to its saturated vapor temperature and its saturated liquid temperature. The first chemical constituent is selected from 1,1,1,3,3-pentafluoropropane, 1,1,2,2,3-pentafluoropropane, 1,1,1,3,3-pentafluorobutane, methyl perfluoropropyl ether, 1,1,1,2,3,3-hexafluoropropane and 1,1,1,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone.

## Claims

### Claim 1

A composition comprising:
a zeotropic mixture including, by weight, 15-5% of a first chemical constituent and 85-95% of at least one second, different chemical constituent, the zeotropic mixture having a temperature glide of 5° C.-25° C. with regard to its saturated liquid temperature and its saturated vapor temperature, wherein the first chemical constituent is 1,1,1,3,3-pentafluoropropane and the second chemical constituent is pentane.

### Claim 2 (depends on 1)

The composition as recited in claim 1, wherein the temperature glide is 8° C.-20° C.

### Claim 3 (depends on 1)

The composition as recited in claim 1, wherein the zeotropic mixture includes an additive selected from the group consisting of flammability inhibitors, oils, lubricants, heat transfer enhancement agents, and combinations thereof, and the zeotropic mixture includes, by weight, less than 5% of the additive.