Process for restoring membrane permeation properties

Pinnau, I; Toy, L G; Casillas, C G

Title: Process for restoring membrane permeation properties

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Abstract

A process is described for restoring the selectivity of high-free-volume, glassy polymer membranes for condensable components over less-condensable components or non-condensable components of a gas mixture. The process involves exposing the membrane to suitable sorbent vapor, such as propane or butane, thereby reopening the microvoids that make up the free volume. The selectivity of an aged membrane may be restored to 70--100% of its original value. The selectivity of a membrane which is known to age over time can also be maintained by keeping the membrane in a vapor environment when it is not in use. 8 figs.

Inventors:: Pinnau, I; Toy, L G; Casillas, C G

Issue Date:: 1997-05-20

Research Org.:: Membrane Technology and Research, Inc

Sponsoring Org.:: USDOE, Washington, DC (United States)

OSTI Identifier:: 489092

Patent Number(s):: 5630970

Application Number:: PAN: 8-448,652

Assignee:: Membrane Technology and Research, Inc., Menlo Park, CA (United States)

DOE Contract Number:: FG03-90ER81066; FG03-94ER81811

Resource Type:: Patent

Resource Relation:: Other Information: PBD: 20 May 1997

Country of Publication:: United States

Language:: English

Subject:: 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; MEMBRANES; REGENERATION; PERMEABILITY; POLYMERS; SORPTIVE PROPERTIES; AGING

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                    Pinnau, I, Toy, L G, and Casillas, C G. Process for restoring membrane permeation properties.  United States: N. p., 1997. 
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                    Pinnau, I, Toy, L G, & Casillas, C G. Process for restoring membrane permeation properties.  United States.

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                    Pinnau, I, Toy, L G, and Casillas, C G. Tue .  
        "Process for restoring membrane permeation properties".  United States.

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@article{osti_489092,

  title        = {Process for restoring membrane permeation properties},

  author       = {Pinnau, I and Toy, L G and Casillas, C G},

  abstractNote = {A process is described for restoring the selectivity of high-free-volume, glassy polymer membranes for condensable components over less-condensable components or non-condensable components of a gas mixture. The process involves exposing the membrane to suitable sorbent vapor, such as propane or butane, thereby reopening the microvoids that make up the free volume. The selectivity of an aged membrane may be restored to 70--100% of its original value. The selectivity of a membrane which is known to age over time can also be maintained by keeping the membrane in a vapor environment when it is not in use. 8 figs.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1997},

  month        = {5}

}

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