Azeotropic and azeotrope-like compositions of E-1,1,1,4,4,4-hexafluoro-2-butene

US7972525B2 · kind B2 · utility

Assignee

• E.I. DU PONT DE NEMOURS AND COMPANY · US

Inventor

• Mark L. Robin · Middletown, US

Key dates

• Filing date: Jun 12, 2008
• Grant date: Jul 5, 2011
• Expiry date: Jun 12, 2028

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K2205/126
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Azeotropic or azeotrope-like compositions are disclosed. The azeotropic or azeotrope-like compositions are mixtures of E-1,1,1,4,4,4-hexafluoro-2-butene with methyl formate, n-pentane, 2-methylbutane, trans-1,2-dichloroethylene, 1,1,1,3,3-pentafluoropropane, n-butane or isobutane. Also disclosed is a process of preparing a thermoplastic or thermoset foam by using such azeotropic or azeotrope-like compositions as blowing agents. Also disclosed is a process of producing refrigeration by using such azeotropic or azeotrope-like compositions. Also disclosed is a process of using such azeotropic or azeotrope-like compositions as solvents. Also disclosed is a process of producing an aerosol product by using such azeotropic or azeotrope-like compositions. Also disclosed is a process of using such azeotropic or azeotrope-like compositions as heat transfer media. Also disclosed is a process of extinguishing or suppressing a fire by using such azeotropic or azeotrope-like compositions. Also disclosed is a process of using such azeotropic or azeotrope-like compositions as dielectrics.