Title:
REMOVAL OF HEAVY METAL IONS AND ARSENIC FROM WET PROCESS PHOSPHORIC ACID
Document Type and Number:
Japanese Patent JPS5921508
Kind Code:
A
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 DEG and 100 DEG 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 DEG C. and with the adsorbent at temperatures lower than 50 DEG C.
Inventors:
GIYUNTAA SHINMERU
RAINHARUTO GURAATORU
GERO HAIMAA
RAINHARUTO GURAATORU
GERO HAIMAA
Application Number:
JP12115983A
Publication Date:
February 03, 1984
Filing Date:
July 05, 1983
Export Citation:
Assignee:
HOECHST AG
International Classes:
C01B25/237; C01B25/238; C01G1/00; C01G3/00; C01G11/00; C01G13/00; C01G21/00; C01G28/00; C22B3/00; C22B3/38; (IPC1-7): C01B25/238
Attorney, Agent or Firm:
Toshio Yano