Hydrous gel membranes for gas separation

Details Hydrous gel membranes for gas separation Hydrous gel membranes for gas separation

1993-09-29

1995-04-25

Spitzer, Robert

Gas separation: apparatus

Apparatus for selective diffusion of gases

Membrane having ring containing organic compound

95 51, B01D 5322, B01D 6910

Patent

active

054095255

ABSTRACT:
This invention relates to hydrous gel membranes for gas separation which comprise support membranes formed by solvent-soluble polymeric materials containing in their repeating unit a bulky structural part and hydrophilic functional groups represented by the following general formula (1) ##STR1## (R.sub.1, R.sub.2, R.sub.3, and R.sub.4 designate hydrogen, alkyl group, and halogen and R.sub.5 and R.sub.6 designate any one of --H, --SO.sub.3 H, --COOH, and --OH) and water or an aqueous solution of substances with affinity for CO.sub.2 substantially uniformly retained in the support membranes. The membranes show not only high CO.sub.2 permeation and CO.sub.2 selectivity but also long-term stable membrane performance and ease of fabricability into membranes and are capable of recovering a large volume of CO.sub.2 generated at stationary sites efficiently at low cost.

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