Method of making composite membrane

US8580341B2 · kind B2 · utility

Assignee

• General Electric Company · US

Inventors

• Hua Wang · Clifton Park, US
• Su Lu · Shanghai, CN
• Hua Li · Gongguan, TW
• Steven Thomas Rice · Scotia, US
• Joseph Anthony Suriano · Clifton Park, US
• Bing Zhang · Shanghai, CN
• Chen Wang · Shanghai, CN
• Lawrence C. Costa · Nanuet, US
• Steven John Harrold · Vista, US
• David Allen Olson · Minnetonka, US
• Wenqing Peng · Shanghai, CN

Key dates

• Filing date: May 22, 2009
• Grant date: Nov 12, 2013
• Expiry date: Nov 22, 2029

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/249991
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The present invention provides a composite membrane comprising a porous base membrane and a polyamide coating disposed on said porous base membrane, said polyamide coating comprising a C3-C8 cyclic carbonyl compound and a C1-C8 amide compound, said amide compound comprising at least one N—H moiety. In addition the present invention provides a method of preparing a composite membrane comprising contacting under interfacial polymerization conditions an organic solution comprising a polyacid halide with an aqueous solution comprising a polyamine, said contacting being carried out on a surface of a porous base membrane, said organic solution further comprising a C3-C8 cyclic carbonyl compound, said aqueous solution comprising a C1-C8 amide compound, said amide compound comprising at least one N—H moiety.