Plasma separation membrane

Details Plasma separation membrane Plasma separation membrane

2007-06-25

2011-11-08

Menon, Krishnan S (Department: 1777)

Liquid purification or separation

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Material

C210S500410, C264S558000, C264S561000, C264S209100, C264S211140, C264S211160, C264S041000, C264S049000

Reexamination Certificate

active

08051991

ABSTRACT:
A process for manufacturing of an asymmetric hollow fiber membrane, comprising the steps of extruding a polymer solution through the outer ring slit of a hollow fiber spinning nozzle, simultaneously extruding a center fluid through the inner bore of the hollow fiber spinning nozzle, into a precipitation bath, whereby the polymer solution contains 10 to 26 wt-% of polysulfone (PSU), polyethersulfone (PES) or polyarylethersulfone (PAES), 8 to 15 wt-% polyvinylpyrrolidone (PVP), 55 to 75 wt-% N-alkyl-2-pyrrolidone (NAP) and 3 to 9 wt-% water the centre fluid contains 70 to 90 wt-% N-alkyl-2-pyrrolidone (NAP) and 10 to 30 wt-% water, and the precipitation bath contains 0 to 20 wt-% N-alkyl-2-pyrrolidone (NAP) and 80 to 100 wt-% water.

REFERENCES:
patent: 5232597 (1993-08-01), Eguchi
patent: 6103117 (2000-08-01), Shimagaki et al.
patent: 6163363 (2000-12-01), Nelson et al.
patent: 6355730 (2002-03-01), Kozawa et al.
patent: 2004/0050791 (2004-03-01), Herczeg
patent: 2007/0163949 (2007-07-01), Wechs et al.
patent: 2008/0000828 (2008-01-01), Wechs et al.
patent: 10 2004 008 220 (2005-09-01), None
patent: 10 2004 008 221 (2005-09-01), None
patent: 10 2004 008 219 (2005-10-01), None
patent: 0 543 355 (1993-05-01), None
patent: 0 882 494 (1998-12-01), None
patent: 1 547 628 (2005-06-01), None
patent: 7-258915 (1995-10-01), None
patent: WO 2004/056460 (2004-07-01), None

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