Process for removing heavy metal ions from wet-processed phospho

Details Process for removing heavy metal ions from wet-processed phospho Process for removing heavy metal ions from wet-processed phospho

1983-01-03

1984-06-05

Heller, Gregory A.

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

423 24, 423 89, 423100, 423321S, C01B 2516, B01D 1100, C01G 1700, B03C 100

Patent

active

044527683

ABSTRACT:
The disclosure relates to process for removing heavy metal ions, especially cadmium, copper, lead and mercury ions from wet-processed phosphoric acid. To this end, the crude acid is contacted with a mixture consisting of an adsorbent and a diorganyldithiophosphoric acid ester or, after treatment with the ester, the acid is contacted with the adsorbent alone, and the purified phosphoric acid is ultimately separated from the ester and adsorbent.

REFERENCES:
patent: 4226791 (1980-10-01), Reinhard et al.
patent: 4256570 (1981-03-01), Allen et al.

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