Process for producing scorodite and recycling the post-scorodite-synthesis solution
US8277633B2 · kind B2 · utility
4Cited by
4References
2Claims
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Key dates
| Filing date | Jun 4, 2008 |
| Grant date | Oct 2, 2012 |
| Priority date | — |
| Expiry date | Aug 3, 2031 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01G49/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention is to provide a process for producing a scorodite that can shorten the time required for synthesizing the scorodite, and further can improve the yield of arsenic and iron into the scorodite. Accordingly, a process for producing a crystalline scorodite from an acidic aqueous solution containing pentavalent As and trivalent Fe, wherein the synthesis of the crystalline scorodite is performed after the molar ratio of trivalent Fe to pentavalent As contained in the acidic aqueous solution is adjusted to be equal to or more than 0.9 and equal to or less than 1.1 is provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.