High surface area adsorbents and method of preparation
US6235802A · kind A · utility
2Cited by
5References
5Claims
0Family size
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Key dates
| Filing date | Aug 10, 2000 |
| Grant date | May 22, 2001 |
| Priority date | — |
| Expiry date | Aug 10, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2810/20
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for the preparation of high surface area, low-swelling macroporous polymeric adsorbents is disclosed. The use of organic sulfonic acids to provide postcrosslinking of macroporous copolymers eliminates the need for traditional organic swelling solvents and Lewis-acid catalysts used to provide conventional macronetted polymers. In particular, methanesulfonic acid provides macroporous polymeric adsorbents having high surface area and porosity, low levels of residual vinyl groups, and free of residual contaminants from conventional Lewis-acid/Friedel-Crafts reactions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.