Production of permeable cellulose triacetate membranes

Details Production of permeable cellulose triacetate membranes Production of permeable cellulose triacetate membranes

1985-09-16

1986-12-23

Lowe, James

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

264187, 264218, B29C 6720, B29K 100

Patent

active

046311572

ABSTRACT:
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.

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