Hydrogenation of polymers in the presence of supercritical carbon dioxide
US7408009B2 · kind B2 · utility
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8References
24Claims
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Key dates
| Filing date | Nov 3, 2003 |
| Grant date | Aug 5, 2008 |
| Priority date | — |
| Expiry date | Nov 3, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/54
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method of hydrogenating a polymer comprises: (a) providing a dense phase, the dense phase comprising a polymer in a solvent; (b) providing a catalyst system, the catalyst system comprising as least one metal hydrogenation catalyst (preferably including nickel or ruthenium); and (c) providing a light phase, the light phase comprising, consisting of or consisting essentially of hydrogen and carbon dioxide; and (d) contacting the dense phase, the light phase and the catalyst system under conditions in which the hydrogen reacts with the polymer and hydrogenates the polymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.