发明名称 |
Process for producing phosphoric acid |
摘要 |
Phosphoric acid and gypsum are produced from phosphate rock by digesting same with sulfuric acid to produce a high concentration of phosphoric acid and calcium sulfate hemihydrate. The solubilized uranium in the rock is rendered recoverable by reducing same from the +6 valence state to the +4 valence state during the digestion step followed by oxidizing back to the +6 valence state in a subsequent step.
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申请公布号 |
US4311677(A) |
申请公布日期 |
1982.01.19 |
申请号 |
US19790099917 |
申请日期 |
1979.12.03 |
申请人 |
SWISS ALUMINIUM LTD. |
发明人 |
GERUNDA, ARTHUR B.;GOERS, WALTER E. |
分类号 |
C01B25/229;C22B60/02;(IPC1-7):C01B25/23;C01B25/22;C01G43/00 |
主分类号 |
C01B25/229 |
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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