Method for separating iron from nickel and/or cadmium from a waste containing the same
US5728854A · kind A · utility
4Cited by
4References
20Claims
0Family size
Assignee
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Key dates
| Filing date | Aug 6, 1996 |
| Grant date | Mar 17, 1998 |
| Priority date | — |
| Expiry date | Aug 6, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/84
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A method for separating iron for nickel and/or cadmium contained in a battery waste is composed of a first step in which the spent batteries are crushed and calcined. The calcined pieces are mixed with an acetic acid aqueous solution before acetic acid and water are removed by evaporation or distillation so as to produce a residue containing metallic acetates. Water, the residue and an oxidant are mixed such that Fe.sup.+ and Fe.sup.++ acetates are converted into a basic ferric acetate, Fe(CH.sub.3 COO).sub.2 OH, which is insoluble in water and is recovered by filtration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.