Production of permeable cellulose triacetate membranes
Patent
·
OSTI ID:866087
- Bend, OR
A phase inversion process for the preparation of cellulose triacetate (CTA) and regenerated cellulose membranes is disclosed. Such membranes are useful as supports for liquid membranes in facilitated transport processes, as microfiltration membranes, as dialysis or ultrafiltration membranes, and for the preparation of ion-selective electrodes. The process comprises the steps of preparing a casting solution of CTA in a solvent comprising a mixture of cyclohexanone and methylene chloride, casting a film from the casting solution, and immersing the cast film in a methanol bath. The resulting CTA membrane may then be hydrolyzed to regenerated cellulose using conventional techniques.
- Research Organization:
- Bend Research Inc
- DOE Contract Number:
- AC06-79ER10337
- Assignee:
- Bend Research, Inc. (Bend, OR)
- Patent Number(s):
- US 4631157
- OSTI ID:
- 866087
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
/264/
bath
cast
casting
casting solution
cellulose
cellulose triacetate
chloride
comprises
comprising
conventional
conventional techniques
cta
cyclohexanone
dialysis
disclosed
electrodes
facilitated
facilitated transport
film
hydrolyzed
immersing
inversion
inversion process
ion-selective
liquid
liquid membrane
liquid membranes
membrane
membranes
methanol
methylene
methylene chloride
microfiltration
mixture
permeable
phase
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preparation
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process
process comprises
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production
regenerated
resulting
solution
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solvent comprising
steps
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transport
transport process
triacetate
ultrafiltration
useful
bath
cast
casting
casting solution
cellulose
cellulose triacetate
chloride
comprises
comprising
conventional
conventional techniques
cta
cyclohexanone
dialysis
disclosed
electrodes
facilitated
facilitated transport
film
hydrolyzed
immersing
inversion
inversion process
ion-selective
liquid
liquid membrane
liquid membranes
membrane
membranes
methanol
methylene
methylene chloride
microfiltration
mixture
permeable
phase
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preparation
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process comprises
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production
regenerated
resulting
solution
solvent
solvent comprising
steps
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techniques
transport
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triacetate
ultrafiltration
useful