Cellulose ester blend membranes, process for making same and the

Details Cellulose ester blend membranes, process for making same and the Cellulose ester blend membranes, process for making same and the

1993-10-13

1997-03-18

Smith, Jeffrey T.

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

2105003, B01D 6136

Patent

active

056119305

ABSTRACT:
A method for removing C.sub.1 -C.sub.3 alkanols from their mixtures with hydrocarbons or heteroatom-containing hydrocarbons wherein the method comprises utilizing a membrane comprising a non-porous separation layer of cellulose ester containing polymeric materials, characterized in that said polymeric material is a polymer blend of a first polymer selected from cellulose esters and at least one second polymer selected from polyvinyl pyrrolidone (PVP), copolymers of vinyl pyrrolidone and vinyl acetate (VP-co-VA), polyethylene glycol (PEG), N,N,-dialkylated polyacrylic amide (DPAA) and cellulose esters other than said first polymer.

REFERENCES:
patent: 2930754 (1960-03-01), Stuckey
patent: 3847822 (1974-11-01), Shuey
patent: 4774365 (1988-09-01), Chen et al.
patent: 4824528 (1989-04-01), Polak et al.

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