# US 5,705,471 A · 1,1,2,2,3,3,4,4-octaflourobutane compositions

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- Number: US 5,705,471 A
- Document ID: US5705471A
- Status: Granted
- Kind: A
- Application number: 08/606,241
- Filed: 1996-02-23
- Granted: 1998-01-06
- Earliest claimed: 1994-09-29
- Assignees: E. I. Du Pont de Nemours and Company
- Inventors: Barbara Haviland Minor; Allen Capron Sievert
- Web page: https://patentgrep.com/patent/US5705471A

## CPC

- C08J 9/149: {Mixtures of blowing agents covered by more than one of the groups C08J9/141 - C08J9/143}
- C09K 3/30: for aerosols (aerosol containers B65D83/14)
- C09K 5/045: {containing only fluorine as halogen}
- C11D 7/5072: {Mixtures of only hydrocarbons}
- C11D 7/5077: {Mixtures of only oxygen-containing solvents}
- C23G 5/024: containing hydrocarbons
- C23G 5/02803: {containing fluorine}
- C08J 2203/12: Organic compounds only containing carbon, hydrogen and oxygen atoms, e.g. ketone or alcohol
- C08J 2203/142: Halogenated saturated hydrocarbons, e.g. H3C-CF3
- C08J 2207/04: Aerosol, e.g. polyurethane foam spray
- C09K 2205/104: Carboxylic acid esters
- C09K 2205/11: Ethers
- C09K 2205/114: Cyclic ethers
- C09K 2205/12: Hydrocarbons
- C09K 2205/134: containing sulfur
- C09K 2205/32: The mixture being azeotropic
- C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29)
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C11D: DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C23G: CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS

## Abstract

Compositions of 1,1,2,2,3,3,4,4-octafluorobutane and a hydrocarbon having from 3 to 7 carbon atoms are described. Specific examples include 1,1,2,2,3,3,4,4-octafluorobutane and butane, cyclopropane, isobutane, propane, cyclopentane, 2,2-dimethylbutane, 2-methylbutane, cyclohexane, 2,3-dimethylpentane, 3-ethylpentane, heptane, hexane, methylcyclopentane, 2-methylpentane or 3-methylpentane. Compositions of 1,1,2,2,3,3,4,4-octafluorobutane and ethyl formate, propylene oxide, bis(pentafluoroethyl)sulfide, dimethoxyethane or tetrahydrofuran are also described. The compositions described above, may be azeotropic or azeotrope-like, and may be used as refrigerants, cleaning agents, expansion agents, for polyolefins and polyurethanes, aerosol propellants, heat transfer media, gaseous dielectrics, fire extinguishing agents, power cycle working fluids, polymerization media, particulate removal fluids, carrier fluids, buffing abrasive agents or displacement drying agents.

## Claims

### Claim 1

A binary azeotropic or azeotrope-like composition consisting essentially of 5-99 weight percent 1,1,2,2,3,3,4,4-octafluorobutane and 1-95 weight percent cyclopentane, wherein at about 25.degree. C., the vapor pressure of said composition is higher than the vapor pressure of the individual components.

### Claim 2 (depends on 1)

A process for producing refrigeration, comprising condensing a composition of claim 1 and thereafter evaporating said composition in the vicinity of the body to be cooled.

### Claim 3 (depends on 1)

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

### Claim 4 (depends on 1)

A process for cleaning a solid surface comprising treating said surface with a composition of claim 1.

### Claim 5 (depends on 1)

A process for transferring heat from a heat source to a heat sink using a composition of claim 1.