Gas separation membranes

Schell, William J

Title: Gas separation membranes

Full Record
Other Related Research

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

Show more

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

Show less

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.

Copy to clipboard


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

Copy to clipboard


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

Copy to clipboard


                    
@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}

}

Copy to clipboard

Patent:

View Patent

Save / Share:

Export Metadata

Save to My Library

Similar Records in DOE Patents and OSTI.GOV collections:

Gas Separation Using Organic-Vapor-Resistent Membranes In Conjunctin With Organic-Vapor-Selective Membranes

Patent Baker, Richard W [Palo Alto, CA]; Pinnau, Ingo [Palo Alto, CA]; He, Zhenjie [Fremont, CA]; ...

A process for treating a gas mixture containing at least an organic compound gas or vapor and a second gas, such as natural gas, refinery off-gas or air. The process uses two sequential membrane separation steps, one using membrane selective for the organic compound over the second gas, the other selective for the second gas over the organic vapor. The second-gas-selective membranes use a selective layer made from a polymer having repeating units of a fluorinated polymer, and demonstrate good resistance to plasticization by the organic components in the gas mixture under treatment, and good recovery after exposure to liquidmore »« less
Full Text Available
Process for separating carbon dioxide from flue gas using sweep-based membrane separation and absorption steps

Patent Wijmans, Johannes G.; Baker, Richard W.; Merkel, Timothy C.

A gas separation process for treating flue gases from combustion processes, and combustion processes including such gas separation. The invention involves routing a first portion of the flue gas stream to be treated to an absorption-based carbon dioxide capture step, while simultaneously flowing a second portion of the flue gas across the feed side of a membrane, flowing a sweep gas stream, usually air, across the permeate side, then passing the permeate/sweep gas to the combustor.
Full Text Available
Process for fabricating PBI hollow fiber asymmetric membranes for gas separation and liquid separation

Patent Jayaweera, Indira; Krishnan, Gopala N.; Sanjurjo, Angel; ...

The invention provides methods for preparing an asymmetric hollow fiber, the asymmetric hollow fibers prepared by such methods, and uses of the asymmetric hollow fibers. One method involves passing a polymeric solution through an outer annular orifice of a tube-in-orifice spinneret, passing a bore fluid though an inner tube of the spinneret, dropping the polymeric solution and bore fluid through an atmosphere over a dropping distance, and quenching the polymeric solution and bore fluid in a bath to form an asymmetric hollow fiber.
Full Text Available
Membrane loop process for separating carbon dioxide for use in gaseous form from flue gas

Patent Wijmans, Johannes G; Baker, Richard W; Merkel, Timothy C

The invention is a process involving membrane-based gas separation for separating and recovering carbon dioxide emissions from combustion processes in partially concentrated form, and then transporting the carbon dioxide and using or storing it in a confined manner without concentrating it to high purity. The process of the invention involves building up the concentration of carbon dioxide in a gas flow loop between the combustion step and a membrane separation step. A portion of the carbon dioxide-enriched gas can then be withdrawn from this loop and transported, without the need to liquefy the gas or otherwise create a high-purity stream,more »« less
Full Text Available
Phosphazene membranes for gas separations

Patent Stewart, Frederick F.; Harrup, Mason K.; Orme, Christopher J.; ...

A polyphosphazene having a glass transition temperature ("T.sub.g") of approximately -20.degree. C. or less. The polyphosphazene has at least one pendant group attached to a backbone of the polyphosphazene, wherein the pendant group has no halogen atoms. In addition, no aromatic groups are attached to an oxygen atom that is bound to a phosphorus atom of the backbone. The polyphosphazene may have a T.sub.g ranging from approximately -100.degree. C. to approximately -20.degree. C. The polyphosphazene may be selected from the group consisting of poly[bis-3-phenyl-1-propoxy)phosphazene], poly[bis-(2-phenyl-1-ethoxy)phosphazene], poly[bis-(dodecanoxypolyethoxy)-phosphazene], and poly[bis-(2-(2-(2-.omega.-undecylenyloxyethoxy)ethoxy)ethoxy)phosphazene]- . The polyphosphazene may be used in a separation membrane to selectivelymore »« less
Full Text Available

Similar Records