Carbon sorbent for removal of metal catalysts from pharmaceuticals
US11077421B2 · kind B2 · utility
1Cited by
4References
3Claims
0Family size
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Key dates
| Filing date | Mar 24, 2017 |
| Grant date | Aug 3, 2021 |
| Priority date | — |
| Expiry date | May 9, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/80
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention relates to a carbon sorbent the can selectively remove platinum-group metals and other heavy metals such as tin without co-removing organic synthesis products including pharmaceutical intermediates and finished Active Pharmaceutical Ingredients (APIs). The carbon sorbents of the present invention are made from low-cost, high purity starting materials and the resulting carbon sorbents are also very pure. The carbon sorbents possess a combination of certain nitrogen and phosphorous groups combined with mesoporosity (2 to 50 nm diameter pores) that proves the high metal adsorption.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.