Method for manufacturing scorodite
US7935328B2 · kind B2 · utility
3Cited by
1References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 24, 2008 |
| Grant date | May 3, 2011 |
| Priority date | — |
| Expiry date | Jul 12, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention provides a method for manufacturing scorodite in which scorodite may be obtained at high production efficiency and a high As concentration ratio. The present invention provides a method for manufacturing crystalline scorodite from acidic aqueous solution containing pentavalent As and trivalent Fe, the method comprising a step for adding a basic sodium compound to the acidic aqueous solution such that the sodium concentration in the acidic aqueous solution becomes larger than 0 g/L and equal to or less than 4 g/L.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.