Process for removing heavy metal ions and arsenic from...

Details Process for removing heavy metal ions and arsenic from... Process for removing heavy metal ions and arsenic from...

C - Chemistry, Metallurgy

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C01B 25/238 (2006.01) C01G 3/00 (2006.01) C01G 11/00 (2006.01) C01G 13/00 (2006.01) C01G 21/00 (2006.01) C01G 28/00 (2006.01) C22B 3/38 (2006.01)

Patent

CA 1190720

PROCESS FOR REMOVING HEAVY METAL IONS AND ARSENIC FROM WET-PROCESSED PHOSPHORIC ACID ABSTRACT OF THE DISCLOSURE 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 and 100°C initially with a di- organyldithiophosphoric acid ester and then with an adsor- bent, and the phosphoric 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°C and with the ad- sorbent at temperatures lower than 50°C.

431584

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