Composite carbon fluid separation membranes

Details Composite carbon fluid separation membranes Composite carbon fluid separation membranes

B - Operations, Transporting

01

D

B01D 69/12 (2006.01) B01D 53/22 (2006.01) B01D 67/00 (2006.01) B01D 71/02 (2006.01) B01D 71/44 (2006.01)

Patent

CA 2159446

The invention provides carbon membranes for use in fluid separation processes, particularly gas separations, which are treated with a coating that provides a protective barrier which significantly limits permeation of water vapor or other impurities such as hydrocarbons without significantly inhibiting permeation of the faster fluid component or lowering selectivity. The composite membranes retain good fluid separation properties and are resistant to the adverse effects on membrane performance commonly observed in environments having high humidity. The coating is preferably an amorphous polymer of perfluoro-2,2-dimethyl-1,3-dioxole. The membranes can be of a varied configuration: sheet form, hollow fiber, asymmetrical and the like.

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