Production of permeable cellulose triacetate membranes

Patent · Tue Dec 23 00:00:00 EST 1986

OSTI ID:7152139

Johnson, B M

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): US 4631157; A
• Application Number: PPN: US 6-776522
• OSTI ID: 7152139
• Resource Relation: Patent File Date: 16 Sep 1985
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
SUPPORTED LIQUID MEMBRANES
SUPPORTS
FABRICATION
ACETATES
CELLULOSE
HYDROLYSIS
THIN FILMS
CARBOHYDRATES
CARBOXYLIC ACID SALTS
CHEMICAL REACTIONS
DECOMPOSITION
FILMS
LYSIS
MECHANICAL STRUCTURES
MEMBRANES
ORGANIC COMPOUNDS
POLYSACCHARIDES
SACCHARIDES
SOLVOLYSIS
320303* - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Equipment & Processes
400105 - Separation Procedures