Method for recovering catalyst
US10144007B2 · kind B2 · utility
0Cited by
6References
12Claims
0Family size
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Key dates
| Filing date | Dec 9, 2014 |
| Grant date | Dec 4, 2018 |
| Priority date | — |
| Expiry date | Jul 15, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/582
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A catalyst is recovered from an aqueous reaction mixture comprising heterocyclic nitroxyl catalyst and oxidized cellulose, by: —separating the oxidized cellulose from the reaction mixture, —contacting the reaction mixture with solid hydrophobic adsorbent particles with particle sizes below 350, preferably below 200 μm, more preferably below 100 μm, said particles being silica particles provided with functionalized hydrophobicity, —adsorbing the catalyst to the hydrophobic adsorbent particles, and —eluting the catalyst from the adsorbent particles with an organic solvent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.