Heavy metal cation recovering agent including a silicate or aluminosilicate type compound and a carbonate type compound
US5858242A · kind A · utility
2Cited by
9References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 20, 1997 |
| Grant date | Jan 12, 1999 |
| Priority date | — |
| Expiry date | May 20, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S502/516
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
An agent for recovering heavy metal cations from an aqueous effluent, including a silicate or aluminosilicate type compound, e.g. an alkali metal silicate or aluminosilicate, and a carbonate type compound, e.g. an alkali metal carbonate, and preferably a carrier such as a lay. The agent may also form a cation stabilizer. Said agent is useful for removing or stabilizing heavy metal cations in the water used for cleaning flue gases from waste incineration, particularly household refuse and industrial waste incineration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.