Polyimide membrane for separation of solvents from lube oil
US5264166A · kind A · utility
14Cited by
13References
6Claims
0Family size
Assignee
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Key dates
| Filing date | Apr 23, 1993 |
| Grant date | Nov 23, 1993 |
| Priority date | — |
| Expiry date | Apr 23, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D71/64
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An improved asymmetric membrane fashioned from a polyimide for the liquid separation of solvents from lube oil. The membrane is based on a fully imidized polymer based on 5(6)-amino-1-(4'-aminophenyl)-1,3-trimethylindane polymer and benzophenone tetracarboxylic dianhydride.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.