发明名称 |
Acid resistant PBI membrane for pervaporation dehydration of acidic solvents |
摘要 |
A pervaporation membrane may be an acid-resistant polybenzidimazole (PBI) membrane. The acid-resistant PBI membrane may be a PBI membrane chemically modified by a process selected from the group consisting of sulfonation, phosphonation, cross-linking, N-substitution, and/or combinations thereof. The membrane may be thermally stabilized. A method for the dehydration of an acid material may include the steps of: contacting an acidic aqueous solution with a membrane of an acid-resistant polybenzidimazole; taking away a permeate stream rich in water; and taking away a concentrate steam rich in the acid material. The acidic aqueous solution may be acetic acid. |
申请公布号 |
US9283523(B2) |
申请公布日期 |
2016.03.15 |
申请号 |
US201213480522 |
申请日期 |
2012.05.25 |
申请人 |
PBI Performance Products, Inc. |
发明人 |
Wang Yan;Gruender Michael;Chung Tai-shung |
分类号 |
B01D15/00;C02F1/44;B01D61/36;C08G73/18;B01D67/00;B01D71/64 |
主分类号 |
B01D15/00 |
代理机构 |
Hammer & Associates, P.C. |
代理人 |
Hammer & Associates, P.C. |
主权项 |
1. A method for the dehydration of an acid material comprising the steps of:
contacting an acidic aqueous solution with a membrane comprising an acid-resistant polybenzimidazole (PBI) being a PBI membrane chemically modified by a process selected from the group consisting of sulfonation, phosphonation, N-substitution, and/or combinations thereof, said acid-resistant PBI having a greater resistance to adsorbing an acidic solvent than a same non-acid-resistant PBI; taking away a permeate stream rich in water; and taking away a concentrate stream rich in the acid material. |
地址 |
Charlotte NC US |