Production of permeable cellulose triacetate membranes
Patent
·
OSTI ID:7152139
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., OR (United States)
- Patent Number(s):
- A; US 4631157
- Application Number:
- PPN: US 6-776522
- OSTI ID:
- 7152139
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320303* -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Equipment & Processes
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105 -- Separation Procedures
ACETATES
CARBOHYDRATES
CARBOXYLIC ACID SALTS
CELLULOSE
CHEMICAL REACTIONS
DECOMPOSITION
FABRICATION
FILMS
HYDROLYSIS
LYSIS
MECHANICAL STRUCTURES
MEMBRANES
ORGANIC COMPOUNDS
POLYSACCHARIDES
SACCHARIDES
SOLVOLYSIS
SUPPORTED LIQUID MEMBRANES
SUPPORTS
THIN FILMS
320303* -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Equipment & Processes
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105 -- Separation Procedures
ACETATES
CARBOHYDRATES
CARBOXYLIC ACID SALTS
CELLULOSE
CHEMICAL REACTIONS
DECOMPOSITION
FABRICATION
FILMS
HYDROLYSIS
LYSIS
MECHANICAL STRUCTURES
MEMBRANES
ORGANIC COMPOUNDS
POLYSACCHARIDES
SACCHARIDES
SOLVOLYSIS
SUPPORTED LIQUID MEMBRANES
SUPPORTS
THIN FILMS