Gas separation membranes

Patent · Mon Jan 01 00:00:00 EST 1979

OSTI ID:863259

Schell, William J ^[1]

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1. Long Beach, CA

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.

• Research Organization: Envirogenics Systems Co
• DOE Contract Number: EX-76-C-01-2000
• Assignee: Envirogenic Systems Company (El Monte, CA)
• Patent Number(s): US 4134742
• OSTI ID: 863259
• Country of Publication: United States
• Language: English

Related Subjects

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/