Solvent-resistant microporous polymide membranes

Miller, Warren K; McCray, Scott B; Friesen, Dwayne T

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Title: Solvent-resistant microporous polymide membranes

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Abstract

An asymmetric microporous membrane with exceptional solvent resistance and highly desirable permeability is disclosed. The membrane is made by a solution-casting or solution-spinning process from a copolyamic acid comprising the condensation reaction product in a solvent of at least three reactants selected from certain diamines and dianhydrides and post-treated to imidize and in some cases cross-link the copolyamic acid. The membrane is useful as an uncoated membrane for ultrafiltration, microfiltration, and membrane contactor applications, or may be used as a support for a permselective coating to form a composite membrane useful in gas separations, reverse osmosis, nanofiltration, pervaporation, or vapor permeation.

Inventors:

Miller, Warren K ^[1]; McCray, Scott B ^[1]; Friesen, Dwayne T ^[1]

Bend, OR

Issue Date:: Thu Jan 01 00:00:00 EST 1998

Research Org.:: Bend Research, Inc. (Bend, OR)

Sponsoring Org.:: USDOE

OSTI Identifier:: 871407

Patent Number(s):: 5725769

Assignee:: Bend Research, Inc. (Bend, OR)

Patent Classifications (CPCs):: B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION

C - CHEMISTRY C08 - ORGANIC MACROMOLECULAR COMPOUNDS C08G - MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS

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B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION
B01D71/64 - Polyimides

C - CHEMISTRY C08 - ORGANIC MACROMOLECULAR COMPOUNDS C08G - MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
C08G73/1042 - {Copolyimides derived from at least two different tetracarboxylic compounds or two different diamino compounds}

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DOE Contract Number:: FG03-92ER81420; FG03-91ER81230

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: solvent-resistant; microporous; polymide; membranes; asymmetric; membrane; exceptional; solvent; resistance; highly; desirable; permeability; disclosed; solution-casting; solution-spinning; process; copolyamic; acid; comprising; condensation; reaction; product; reactants; selected; diamines; dianhydrides; post-treated; imidize; cross-link; useful; uncoated; ultrafiltration; microfiltration; contactor; applications; support; permselective; coating; form; composite; gas; separations; reverse; osmosis; nanofiltration; pervaporation; vapor; permeation; reverse osmosis; porous membrane; composite membrane; reaction product; gas separation; acid comprising; membrane useful; microporous membrane; highly desirable; /210/95/

Citation Formats


                    Miller, Warren K, McCray, Scott B, and Friesen, Dwayne T. Solvent-resistant microporous polymide membranes.  United States: N. p., 1998. 
        Web.

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                    Miller, Warren K, McCray, Scott B, & Friesen, Dwayne T. Solvent-resistant microporous polymide membranes.  United States.

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                    Miller, Warren K, McCray, Scott B, and Friesen, Dwayne T. Thu .  
        "Solvent-resistant microporous polymide membranes".  United States.  https://www.osti.gov/servlets/purl/871407.

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@article{osti_871407,

  title        = {Solvent-resistant microporous polymide membranes},

  author       = {Miller, Warren K and McCray, Scott B and Friesen, Dwayne T},

  abstractNote = {An asymmetric microporous membrane with exceptional solvent resistance and highly desirable permeability is disclosed. The membrane is made by a solution-casting or solution-spinning process from a copolyamic acid comprising the condensation reaction product in a solvent of at least three reactants selected from certain diamines and dianhydrides and post-treated to imidize and in some cases cross-link the copolyamic acid. The membrane is useful as an uncoated membrane for ultrafiltration, microfiltration, and membrane contactor applications, or may be used as a support for a permselective coating to form a composite membrane useful in gas separations, reverse osmosis, nanofiltration, pervaporation, or vapor permeation.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Thu Jan 01 00:00:00 EST 1998},

  month        = {Thu Jan 01 00:00:00 EST 1998}

}

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