Insolubilization of contaminating metallic impurities from liqui

Details Insolubilization of contaminating metallic impurities from liqui Insolubilization of contaminating metallic impurities from liqui

1995-08-30

1997-06-24

Nessler, Cynthia L.

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210724, 210726, C02F 152

Patent

active

056414080

ABSTRACT:
Impure liquid media containing contaminating amounts of metallic impurities, e.g., alkaline earth metals, heavy metals and/or radioactive elements, for example industrial effluents from the nitric acidulation of rare earth concentrates, are purified by separately introducing a source of phosphorus and a source of barium into the impure medium, whereby precipitating a solid residue which comprises a barium phosphate having such contaminating metallic impurities distributed therein, and thence separating the solid residue from the liquid medium thus purified.

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Derwent Publications Ltd., London, GB; AN 87-082442 & JP-A-62 032 399 (MITSUBISHI HEAVY INDUSTRIES K.K.) 12 Feb. 1987.

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