发明名称 |
Copolyimide membranes with high permeability and selectivity for olefin/paraffin separations |
摘要 |
A copolyimide polymer membrane is provided for separation of hydrocarbons including separation of olefins from paraffins and isoparaffins from other paraffins. The copolyimide polymer membranes include a poly(3,3′-diaminobenzophenone-3,3′,5,5′-tetramethyl-4,4′-methylene dianiline-pyromellitic dianhydride) (abbreviated as poly(DAB-TMMDA-PMDA)). The copolyimide membranes prepared from poly(DAB-TMMDA-PMDA) with varying molar ratios of DAB to TMMDA (abbreviated as PI-DAB-T) showed excellent separation properties for propylene/propane separation. |
申请公布号 |
US9327248(B1) |
申请公布日期 |
2016.05.03 |
申请号 |
US201414560207 |
申请日期 |
2014.12.04 |
申请人 |
UOP LLC |
发明人 |
Liskey Carl W.;Liu Chunqing;Tran Howie Q.;Karns Nicole K. |
分类号 |
B01D71/64;B01D53/22;B01D69/08 |
主分类号 |
B01D71/64 |
代理机构 |
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代理人 |
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主权项 |
1. A copolyimide membrane for olefin/paraffin separations comprising a copolyimide membrane that comprises a plurality of repeating units of formula (I) wherein m and n are independent integers from 10 to 500; n/m is in a ratio from 10:1 to 1:10; Y1 is selected from the group consisting of and mixtures thereof, wherein said copolyimide membrane comprises a poly(2,2′-bis(3-amino-4-hydroxyphenyl) hexafluoropropane-(3,3′,5,5′-tetramethyl-4,4′-methylene dianiline-pyromellitic dianhydride) or a poly(2,2′-bis(3-amino-4-methylphenyl) hexafluoropropane-(3,3′,5,5′-tetramethyl-4,4′-methylene dianiline-pyromellitic dianhydride). |
地址 |
Des Plaines IL US |