Perchlorate removal from concentrated salt solutions using amphoteric ion-exchange resins
US8882985B2 · kind B2 · utility
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25Claims
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Key dates
| Filing date | Dec 17, 2008 |
| Grant date | Nov 11, 2014 |
| Priority date | — |
| Expiry date | Aug 12, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2101/12
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A process for reducing the concentration of perchlorate in an aqueous concentrated multi-component salt solution comprising treating the salt solution with an amphoteric ion-exchange resin to provide an adsorbed perchlorate and multi anion-containing resin and a perchlorate depleted solution; and removing the perchlorate depleted solution. The multi-anion are selected from chloride, chlorate, perchlorate, sulphate, and dichromate, present in electrolytic processes for the production of sodium chlorate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.