Multiple-stage precipitation process for heavy metals in aqueous solution
US5262063A · kind A · utility
18Cited by
11References
8Claims
0Family size
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Inventor
Key dates
| Filing date | May 14, 1992 |
| Grant date | Nov 16, 1993 |
| Priority date | — |
| Expiry date | May 14, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S210/911
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
In the process of removing heavy metals from aqueous solutions by precipitation of a salt thereof at increased pH, multiple stage precipitation by upward stepwise pH adjustment and solid separation at each stage is used to facilitate the manufacture of a product of high purity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.