Compositions containing thiolates for removal of heavy metal ions from dilute aqueous solutions
US4508838A · kind A · utility
16Cited by
4References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 19, 1983 |
| Grant date | Apr 2, 1985 |
| Priority date | — |
| Expiry date | Aug 19, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A composition containing thiolate for the removal of heavy metal ions from dilute aqueous solutions, characterized in that the composition is a sorption complex of a thiolate with two or more -SMe- groups (wherein Me represents alkali or ammonium) with a swellable silicate, whose ion exchange capacity is 5-350 milliequivalents/100 g. The composition is suspended in the aqueous medium to be purified and separated off after the absorption of the heavy metal ions from the aqueous solution. The heavy metals can be recovered in known ways.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.