Poly(phenylene)-based anion exchange membrane
| DWPI Title: Poly(phenylene) material, useful as anionic exchange membrane, which is useful in e.g. electrodialysis for the desalination of brackish water, comprises poly(phenylene) compound consisting of two polymers |
| Abstract: A poly(phenylene) compound of copolymers that can be prepared with either random or multiblock structures where a first polymer has a repeat unit with a structure of four sequentially connected phenyl rings with a total of 2 pendant phenyl groups and 4 pendant tolyl groups and the second polymer has a repeat unit with a structure of four sequentially connected phenyl rings with a total of 6 pendant phenyl groups. The second polymer has chemical groups attached to some of the pendant phenyl groups selected from CH3, CH2Br, and CH2N(CH3)3Br groups. When at least one group is CH2N(CH3)3Br, the material functions as an anion exchange membrane. |
| Use: (I) is useful as an anionic exchange membrane (claimed), which is useful in electrodialysis for the desalination of brackish water and for the production of table salt from sea water. |
| Advantage: (I) has high conductivities and ion selectivities; and exhibits excellent chemical stability at high pH values and elevated temperatures. |
| Novelty: Poly(phenylene) material (I) comprises a poly(phenylene) compound (II) consisting essentially of a first polymer (a) and a second polymer (b), where (a) has a structure with 4 phenyl rings and 6 pendant phenyl groups and (b) has a structure with 4 phenyl rings, 2 pendant phenyl groups and 4 pendant tolyl groups. |
| Filed: 4/30/2008 |
| Application Number: US2008112012A |
| Tech ID: SD 10987.0 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
| Data from Derwent World Patents Index, provided by Clarivate All rights reserved. Republication or redistribution of Clarivate content, including by framing or similar means, is prohibited without the prior written consent of Clarivate. Clarivate and its logo, as well as all other trademarks used herein are trademarks of their respective owners and used under license. |