Process for removing heavy metal ions from wet- processed...

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

C - Chemistry, Metallurgy

01

B

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C01B 25/238 (2006.01) C01B 25/237 (2006.01)

Patent

CA 1195824

PROCESS FOR REMOVING HEAVY METAL IONS FROM WET-PROCESSED PHOSPHORIC ACID ABSTRACT OF THE DISCLOSURE 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.

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