Process for the separation of heavy metal compounds from phospho

Details Process for the separation of heavy metal compounds from phospho Process for the separation of heavy metal compounds from phospho

1983-04-01

1984-10-30

Heller, Gregory A.

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

423 92, 423 99, 423100, 423321S, C01B 2516

Patent

active

044799241

ABSTRACT:
A process for the separation of heavy metal components, especially of compounds of cadmium, mercury and lead, from crude phosphoric acid obtained according to the Odda process, which comprises adjusting this crude phosphoric acid with ammonia to a pH of from 0.5 to 1.5, contacting it subsequently with a diorganyl-dithiophosphorus compound and an adsorbent, and then separating the acid from the absorbent containing the heavy metal impurities.

REFERENCES:
patent: 2044940 (1936-06-01), Haag et al.
patent: 4208389 (1980-06-01), Hiraga
patent: 4226791 (1980-10-01), Reinhardt et al.
patent: 4369169 (1983-01-01), Nineuil

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