Process for removing heavy metal ions and arsenic from wet-proce

Details Process for removing heavy metal ions and arsenic from wet-proce Process for removing heavy metal ions and arsenic from wet-proce

1983-06-24

1984-08-21

Heller, Gregory A.

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

423 24, 423 87, 423 89, 423100, 423321S, C01B 2516, B01D 1100, C01G 1700, B03C 100

Patent

active

044669488

ABSTRACT:
The disclosure relates to a process for removing heavy metal ions and arsenic from wet-processed phosphoric acid, wherein the crude wet-processed phosphoric acid is treated at temperatures between 10.degree. and 100.degree. C. initially with a diorganyldithiosphosphoric acid ester and then with an adsorbent, and the phoshoric acid so purified is separated from the ester and adsorbent. More particularly, the wet-processed phosphoric acid is treated with the diorganyldithiophosphoric acid ester at temperatures higher than 50.degree. C. and with the adsorbent at temperatures lower than 50.degree. C.

REFERENCES:
patent: 4226791 (1980-10-01), Reinhardt et al.

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