Multilayer interfacial composite membrane
First Claim
Patent Images
1. A separation process, comprising the steps of:
- (a) providing a separation membrane having a feed side and a permeate side, said membrane comprising;
a microporous substrate layer;
a sealing layer coating said microporous substrate layer;
an interfacially polymerized permselective layer formed on said sealing layer;
(b) contacting said feed side with a feed fluid mixture comprising component A and component B;
(c) withdrawing from said permeate side a gas mixture enriched in component A compared with said feed fluid mixture.
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Abstract
A composite membrane particularly useful for gas separation or pervaporation. The membrane has three layers: a microporous substrate, an intermediate sealing layer, and a top permselective layer. The permselective layer is made by interfacial polymerization directly on the sealing layer. The sealing layer prevents penetration of the interfacial polymerization reagents into the substrate pores during membrane preparation and provides a gutter layer in the finished membrane.
103 Citations
31 Claims
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1. A separation process, comprising the steps of:
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(a) providing a separation membrane having a feed side and a permeate side, said membrane comprising; a microporous substrate layer; a sealing layer coating said microporous substrate layer; an interfacially polymerized permselective layer formed on said sealing layer; (b) contacting said feed side with a feed fluid mixture comprising component A and component B; (c) withdrawing from said permeate side a gas mixture enriched in component A compared with said feed fluid mixture. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A membrane suitable for use in gas separation or pervaporation, comprising:
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a microporous substrate layer; a sealing layer coating said microporous substrate layer; an interfacially polymerized permselective layer formed on said sealing layer. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A process for preparing a separation membrane, comprising:
- providing a microporous substrate;
coating said substrate with a sealing layer, to form a composite support membrane; contacting said composite support membrane with a first solution containing a first reagent for a first contact period; and contacting said composite support membrane with a second solution containing a second reagent for a second contact period. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
- providing a microporous substrate;
Specification