Gas separation membranes

Title: Gas separation membranes

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Abstract

A dry, fabric supported, polymeric gas separation membrane, such as cellulose acetate, is prepared by casting a solution of the polymer onto a shrinkable fabric preferably formed of synthetic polymers such as polyester or polyamide filaments before washing, stretching or calendering (so called griege goods). The supported membrane is then subjected to gelling, annealing, and drying by solvent exchange. During the processing steps, both the fabric support and the membrane shrink a preselected, controlled amount which prevents curling, wrinkling or cracking of the membrane in flat form or when spirally wound into a gas separation element.

Inventors:

Schell, William J ^[1]

Long Beach, CA

Issue Date:: 1979-01-01

Research Org.:: Envirogenics Systems Co

OSTI Identifier:: 863259

Patent Number(s):: 4134742

Assignee:: Envirogenic Systems Company (El Monte, CA)

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

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B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION
B01D63/10 - Spiral-wound membrane modules
B01D69/10 - Supported membranes
B01D53/22 - by diffusion
B01D53/228 - {characterised by specific membranes}
B01D63/08 - Flat membrane modules

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DOE Contract Number:: EX-76-C-01-2000

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: gas; separation; membranes; dry; fabric; supported; polymeric; membrane; cellulose; acetate; prepared; casting; solution; polymer; shrinkable; preferably; formed; synthetic; polymers; polyester; polyamide; filaments; washing; stretching; calendering; called; griege; subjected; gelling; annealing; drying; solvent; exchange; processing; steps; support; shrink; preselected; controlled; amount; prevents; curling; wrinkling; cracking; flat; form; spirally; wound; element; preferably formed; processing steps; gas separation; separation membrane; cellulose acetate; spirally wound; separation membranes; controlled amount; separation element; processing step; supported membrane; synthetic polymer; /95/96/210/264/

Citation Formats


                    Schell, William J. Gas separation membranes.  United States: N. p., 1979. 
        Web.

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                    Schell, William J. Gas separation membranes.  United States.

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                    Schell, William J. Mon .  
        "Gas separation membranes".  United States.  https://www.osti.gov/servlets/purl/863259.

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@article{osti_863259,

  title        = {Gas separation membranes},

  author       = {Schell, William J},

  abstractNote = {A dry, fabric supported, polymeric gas separation membrane, such as cellulose acetate, is prepared by casting a solution of the polymer onto a shrinkable fabric preferably formed of synthetic polymers such as polyester or polyamide filaments before washing, stretching or calendering (so called griege goods). The supported membrane is then subjected to gelling, annealing, and drying by solvent exchange. During the processing steps, both the fabric support and the membrane shrink a preselected, controlled amount which prevents curling, wrinkling or cracking of the membrane in flat form or when spirally wound into a gas separation element.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1979},

  month        = {1}

}

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