Title:
COMPOSITIONS AND PROCESSES FOR REMOVING HEAVY METALS FROM PHOSPHORIC ACID SOLUTIONS
Document Type and Number:
WIPO Patent Application WO/2019/071108
Kind Code:
A3
Abstract:
Processes for removing/recovering heavy metal ions in solutions containing phosphoric acid by adding reagents having at least one organothiophosphorus compound and at least one surfactant to the solution during the wet-process phosphoric acid production process to form heavy metal complexes, and separating the heavy metal complexes from the solution are provided herein.
Inventors:
ZHANG LEI (US)
QIU XUEPING (US)
RAITANI RAJESH (US)
QIU XUEPING (US)
RAITANI RAJESH (US)
Application Number:
PCT/US2018/054578
Publication Date:
May 23, 2019
Filing Date:
October 05, 2018
Export Citation:
Assignee:
CYTEC IND INC (US)
International Classes:
C01B25/237
Domestic Patent References:
| WO1997001649A1 | 1997-01-16 | |||
| WO1991000244A1 | 1991-01-10 |
Foreign References:
| EP0482160A1 | 1992-04-29 | |||
| US20040179984A1 | 2004-09-16 | |||
| US4503016A | 1985-03-05 |
Other References:
See also references of EP 3691992A4
Attorney, Agent or Firm:
BELL, Charles, E. et al. (US)
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