Recovery of noble metals from aqueous process streams
US7687663B2 · kind B2 · utility
15Cited by
126References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 14, 2005 |
| Grant date | Mar 30, 2010 |
| Priority date | — |
| Expiry date | Nov 4, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
This invention generally relates to processes for recovering solubilized noble metals from aqueous process streams, in particular, aqueous process streams generated in the preparation of an N-(phosphonomethyl)glycine product, for example, by noble metal-catalyzed oxidation of an N-(phosphonomethyl)iminodiacetic acid substrate. The process includes contacting the aqueous process stream with a noble metal adsorption media such as an ion exchange resin to remove solubilized noble metal from the process stream.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.