Removal of heavy metal ions from aqueous solutions with insoluble cross-linked-starch-xanthates
US3979286A · kind A · utility
8Cited by
2References
4Claims
0Family size
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Key dates
| Filing date | Oct 16, 1974 |
| Grant date | Sep 7, 1976 |
| Priority date | — |
| Expiry date | Oct 16, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F1/286
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
An insoluble-starch-xanthate composition is prepared which is capable of removing most heavy metal ions from aqueous solutions. Concentrations of heavy metal ions contained in several industrial effluents were reduced to below the most stringent aqueous discharge limits.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.