发明名称 |
Process for global recovery of uranium, rare earth metals, thorium and yttrium from an acid solution. |
摘要 |
1. A continuous process for the total recovery of uranium IV and/or VI, thorium, yttrium and rare earths contained in an acid aqueous starting phase which is a crude wet-process phosphoric acid or else which was produced either from a residual phosphogypsum containing said metal species in an insoluble state by treatment by means of a strong inorganic acid in aqueous solution, or as an aqueous raffinate from extraction with water-insoluble or weakly water-soluble solvents of a crude wet-process phosphoric acid, characterised in that said acid aqueous solution is brought into contact with a homogenous organic phase comprising a di-(alkylphenyl) phosphoric acid which is free from mono-(alkylphenyl) phosphoric derivative and an inert organic solvent selected from aliphatic or aromatic hydrocarbons used alone or in the form of a mixture, whereby, as the result, after separation of the phases, there are collected a substantially exhausted aqueous phase and an organic phase charged with uranium, thorium, yttrium and rare earths. |
申请公布号 |
EP0026132(A1) |
申请公布日期 |
1981.04.01 |
申请号 |
EP19800401307 |
申请日期 |
1980.09.12 |
申请人 |
RHONE-POULENC CHIMIE DE BASE |
发明人 |
LEVEQUE, ALAIN;FORAISON, DOMINIQUE;SABOT, JEAN-LOUIS |
分类号 |
C22B3/38;C22B59/00;C22B60/02 |
主分类号 |
C22B3/38 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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