Composite membrane and method for making the same

Details Composite membrane and method for making the same Composite membrane and method for making the same

2005-04-12

2005-04-12

Fortuna, Ana (Department: 1723)

Liquid purification or separation

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Material

C210S500270, C210S490000

Reexamination Certificate

active

06878278

ABSTRACT:
A composite membrane and method for making the same, comprising a porous support and a polyamide surface. The subject membrane provides improved flux and/or rejection rates. The subject membrane is further capable of operating at lower operating pressures. The subject method includes reacting a polyfunctional amine with a polyfunctional acyl halide to form a polyamide. The method includes the step of contacting a complexing agent with the polyfunctional acyl halide prior substantial reaction between the polyfunctional acyl halide and a polyfunctional amine. The subject process is easily adapted to commercial scale manufacturing processes and is particularly suited for making nanofiltration and reverse osmosis composite membranes.

REFERENCES:
patent: 2648696 (1953-08-01), Whetstone
patent: 3619424 (1971-11-01), Blanchard et al.
patent: 4233434 (1980-11-01), Kraus et al.
patent: 4765897 (1988-08-01), Cadotte et al.
patent: 4824574 (1989-04-01), Cadotte et al.
patent: 4834886 (1989-05-01), Cadotte
patent: 4889636 (1989-12-01), Perry et al.
patent: 4948506 (1990-08-01), Lonsdale et al.
patent: 4950404 (1990-08-01), Chau
patent: 4983291 (1991-01-01), Chau et al.
patent: 5254261 (1993-10-01), Tomaschke et al.
patent: 5614099 (1997-03-01), Hirose et al.
patent: 5733602 (1998-03-01), Hirose et al.
patent: 5755964 (1998-05-01), Mickols
patent: 5843351 (1998-12-01), Hirose et al.
patent: 5876602 (1999-03-01), Jons et al.
patent: 5989426 (1999-11-01), Hirose et al.
patent: 6024873 (2000-02-01), Hirose et al.
patent: 6319404 (2001-11-01), Zhang et al.
patent: 6337018 (2002-01-01), Mickols
patent: 6562266 (2003-05-01), Mickols
patent: 1 950 594 (1970-04-01), None
patent: 0 474 370 (1992-03-01), None
patent: 271847-1988 (1988-10-01), None
patent: H3-80049 (1991-12-01), None
patent: 10 235173 (2001-09-01), None
Corbridge, D.E.C.,Studies in Inorganic Chemistry 6, Phosphorus, An Outline of its Chemistry, Biochemistry and Technology(Third Edition), Elsevier, “Phosphorus—Carbon Compounds”, Chapter 4, pp. 209-212, 1985.
Derwent Abstract, JP2000015067A, Manufacture of Composite Semipermeable Membrane Recovery of Electrode Deposition Paints and Pure Water for Washing Semiconductor, etc., with available selected translated excerpts from patent.
PCT International Search Report corresponding to Application Number PCT/US01/11265.

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