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Title: Solvent-resistant microporous polymide membranes

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:
; ;
Issue Date:
Research Org.:
Bend Research, Inc
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
597099
Patent Number(s):
5725769
Application Number:
PAN: 8-503,809
Assignee:
Bend Research, Inc., Bend, OR (United States)
DOE Contract Number:  
FG03-92ER81420; FG03-91ER81230
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 10 Mar 1998
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; MEMBRANES; CHEMICAL COATING; SEPARATION PROCESSES; AMINES; ANHYDRIDES

Citation Formats

Miller, W K, McCray, S B, and Friesen, D T. Solvent-resistant microporous polymide membranes. United States: N. p., 1998. Web.
Miller, W K, McCray, S B, & Friesen, D T. Solvent-resistant microporous polymide membranes. United States.
Miller, W K, McCray, S B, and Friesen, D T. Tue . "Solvent-resistant microporous polymide membranes". United States.
@article{osti_597099,
title = {Solvent-resistant microporous polymide membranes},
author = {Miller, W K and McCray, S B and Friesen, D 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 = {1998},
month = {3}
}