| 摘要 |
Cross-linked rubbery polyurethane-ether polymeric membranes are made from cross-linked rubbery polyurethane-ether polymers that are synthesized from a diisocyanate-terminated polyether and a tetrol with four hydroxyl functional groups. The hydroxyl groups on the tetrol react with the isocyanate groups on the diisocyanate-terminated polyether to form urethane bonds. The cross-linked rubbery polyurethane-ether polymeric membrane selectively permeate condensable vapors such as C3 to C35 hydrocarbons, aromatics, water vapor, carbon dioxide, and hydrogen sulfide and rejects methane and ethane. The cross-linked rubbery polyurethane-ether polymeric membrane have high permeance for condensable vapors, high selectivity for condensable vapors over methane and ethane, and high resistance to liquid chemicals. |
| 主权项 |
1. A cross-linked rubbery polyurethane-ether polymeric membrane comprising a cross-linked rubbery polyurethane-ether polymer with a plurality of repeating units of a formula (I), wherein said formula (I) is represented by a structure comprising:wherein X1, X2, X3, and X4 are selected from the group consisting ofand mixtures thereof, respectively; X1, X2, X3, and X4 are the same or different from each other; wherein Y is selected from the group consisting ofand mixtures thereof; wherein Z1, Z2, Z3, and Z4 are selected from the group consisting ofand mixtures thereof, respectively; Z1, Z2, Z3, and Z4 are the same or different from each other and t is 0 to 4; and wherein n, m, p, q, r, and s are independent integers from 2 to 500. |
