Title:
RECOVERY OF ZINC
Document Type and Number:
Japanese Patent JP2001064736
Kind Code:
A
Abstract:
To efficiently recover Zn from mine water contg. Zn of low concn. and making it into a product.
This is a method for recovering zinc sulfate from mine water in which alkali is added to a soln. contg. Zn, Fe and Mn, Fe is precipitated, thereafter, Zn is extracted with a solvent from the supernatant, next, Zn is back extracted from the separatively recovered solvent, and the obtd. noble soln. is subjected to treatment of deoxidation neutralization, soln. cleaning, heating concentration and crystallization to obtain Zn, and as to the soln. cleaning treatment, potassium permanganate is added to the back extracting soln., and the oxidation-reduction potential is held to 720 to 980 mV (vsAg-AgCl electrode).
Inventors:
IMAI TETSUO
TSUTSUMI YUKITO
TSUTSUMI YUKITO
Application Number:
JP23835299A
Publication Date:
March 13, 2001
Filing Date:
August 25, 1999
Export Citation:
Assignee:
NIPPON MINING CO
International Classes:
C22B19/20; C22B3/20; C22B19/00; C25C1/16; (IPC1-7): C22B19/20; C25C1/16
Attorney, Agent or Firm:
Mikio Suenari