Fluorinated polymeric membranes for gas separation processes

Details Fluorinated polymeric membranes for gas separation processes Fluorinated polymeric membranes for gas separation processes

1985-12-13

1987-04-14

Spitzer, Robert

Gas separation

Means within gas stream for conducting concentrate to collector

55 68, 55158, 4272481, 428442, B01D 5322

Patent

active

046575642

ABSTRACT:
The present invention is a treated, semi-permeable, polymeric membrane having improved selectivity for separating components of a gas mixture. The membrane is provided by fluorinating a polymer cast into membrane form, having the general structural formula: ##STR1## wherein R.sub.1 is a linear or branched C.sub.1 -C.sub.4 alkyl group; R.sub.2 and R.sub.3 are independently linear or branched C.sub.1 -C.sub.6 alkyl groups; R.sub.4 is a linear or branched C.sub.1 -C.sub.12 alkyl or aryl group; X is a C.sub.1 -C.sub.3 alkyl group or ##STR2## m is at least 100; and n is 0 or 1.

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S. S. Kulkarni et al., "Membrane Separation Processes for Acid Gases", No. 229, vol. 79, AIChE Symposium Series, Tutorial Lectures in Electrochemical Eng. and Tech.-II, pp. 172-178.

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