Reverse osmosis composite membranes for boron removal

US8616380B2 · kind B2 · utility

Assignee

• General Electric Company · US

Inventors

• Hua Wang · Clifton Park, US
• David Allen Olson · Minnetonka, US
• Jiang Ji · Beijing, CN
• Michael Todd Luttrell · Clifton Park, US
• Gary William Yeager · Niskayuna, US
• Joseph Anthony Suriano · Clifton Park, US
• Lawrence C. Costa · Nanuet, US

Key dates

• Filing date: Jun 20, 2012
• Grant date: Dec 31, 2013
• Expiry date: Jun 20, 2032

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02A20/131
• WIPO field: Environmental technology
• WIPO sector: Chemistry

Abstract

Improved methods for reducing boron concentration in seawater or brackish water, while simultaneously maintaining or improving the salt rejection of membrane and flow performance of polyamide reverse osmosis (RO) membranes include contacting the water with a composite membrane comprising moieties derived from an aromatic sulfonyl halide, a heteroaromatic sulfonyl halide, a sulfinyl halide; a sulfenyl halide; a sulfuryl halide; a phosphoryl halide; a phosphonyl halide; a phosphinyl halide; a thiophosphoryl halide; a thiophosphonyl halide, an isocyanate, a urea, a cyanate, an aromatic carbonyl halide, an epoxide or a mixture thereof.