发明名称 |
Conversion of phosphoric acid waters |
摘要 |
Converting wet-process phosphoric acid operations, to minimize and nearly eliminate discharge of contaminants to the environment, by generation, use, and treatment of new and unique process waters. Fluorides and other contaminants soluble under acidic conditions are insolubilized, and substantially all phosphoric acid is recovered. Acid pond water from conventional wet-process phosphoric acid manufacturing is replaced by neutralized gypsum stack water having a pH closely matching that of the surroundings. Both air and ground water contamination are reduced to essentially negligible levels.
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申请公布号 |
US5366640(A) |
申请公布日期 |
1994.11.22 |
申请号 |
US19930120331 |
申请日期 |
1993.09.14 |
申请人 |
PALM, GORDON W.;PALM, LEGAL REPRESENTATIVE, BY MARCELLA W.;HARTIG, R. GEORGE |
发明人 |
PALM, GORDON W.;PALM, LEGAL REPRESENTATIVE, BY MARCELLA W.;HARTIG, R. GEORGE |
分类号 |
C02F1/66;(IPC1-7):C02F1/62 |
主分类号 |
C02F1/66 |
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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