Title:
【発明の名称】重金属の回収方法
Document Type and Number:
Japanese Patent JP2508162
Kind Code:
B2
Abstract:
PURPOSE:To efficiently recover heavy metal without influence of coexisting ion, by bringing a soln. contg. the heavy metal into contact with a chelating agent obtd. by decomposing the amidoxime group and/or the imidodioxime group as a functional group with aq. acid or alkali soln. CONSTITUTION:The chelating agent having the functional group(s) above- mentioned is treated by decomposing the group(s) at about 40-80 deg.C with the aq. soln. of mineral acid such as hydrochloric acid, or at about 70-110 deg.C with the aq. soln. of alkali such as NaOH. Then, the chelating agent obtd. by decomposing as above-mentioned is brought into contact usually at 10-100 deg.C with the soln. contg. heavy metal to recover the heavy metal by adsorbing on the chelating agent. According to the method above-mentioned, the coexisting ion hardly effects the recovering, and the concn. of heavy metal in adsorption equil. can be reduced in an aq. soln. having high concn. of salts.
Inventors:
MATSUDA KIMIAKI
OCHI KENJI
KOSAKA ICHIRO
OCHI KENJI
KOSAKA ICHIRO
Application Number:
JP30055987A
Publication Date:
June 19, 1996
Filing Date:
November 28, 1987
Export Citation:
Assignee:
SUMITOMO CHEMICAL CO
International Classes:
C01G49/00; B01J45/00; C01D17/00; C01F17/00; C01G1/00; C01G3/00; C01G17/00; C01G43/00; C01G45/00; C01G51/00; C01G53/00; C01G55/00; (IPC1-7): C01F17/00; B01J45/00
Domestic Patent References:
| JP5954626A | ||||
| JP5933417B2 | ||||
| JP5933416B2 | ||||
| JP5916812B2 |
Attorney, Agent or Firm:
Mitsuhiro Moroishi (1 person outside)