Mixtures of organic phosphonates and anionic polymers to improve acid extraction of uranium
US4431611A · kind A · utility
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2Claims
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Key dates
| Filing date | Dec 23, 1981 |
| Grant date | Feb 14, 1984 |
| Priority date | — |
| Expiry date | Dec 23, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22B60/0226
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method of improving the acid leaching of uranium ores which comprises adding to such ores while they are being leached between 0.01-2 lb. per ton of a composition comprising: PA0 a. aminotris methylene phosphonic acid, and PA0 b. a water-soluble copolymer of vinyl sulphonic acid and acrylic acid combined in a weight ratio of from 2:1 to 1:2 and having a molecular weight within the range of from 500 to 100,000, with the weight ratio of a:b being within the range of 1:2 to 2:1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.