Title:
【発明の名称】キレート化剤に吸着した重金属の溶離方法
Document Type and Number:
Japanese Patent JPH0777617
Kind Code:
B2
Abstract:
PURPOSE:To facilitate elution of heavy metal by eluting heavy metal adsorbed on a chelating agent having easily decomposed functional group and/or the functional group difficultly eluting heavy metal in the molecule, with polyaminopolycarboxylic acid, etc. CONSTITUTION:The heavy metal adsorbed on the chelating agent having easily decomposed functional group and/or the functional group difficultly eluting heavy metal in the molecule, is eluted with an eluent consisting of polyaminopolycarboxylic acid or its salt. As easily decomposed functional group, oxime residue, phosphonic acid ester residue, phosphinic acid ester residue, etc., are exemplified and as the functional group difficultly eluting heavy metal, aminophosphoric acid residue, etc., are exemplified. As polyaminopolycarboxylic acid, ethylenediaminetetraacetic acid, diethylenetriaminepentaacetic acid, etc., are exemplified and as its salt, alkali metal salt, alkali earth metal salt, ammonium salt, amine salt, etc., are exemplified.
Inventors:
Kimiaki Matsuda
Kenji Ochi
Masahiro Aoi
Kenji Ochi
Masahiro Aoi
Application Number:
JP24827887A
Publication Date:
August 23, 1995
Filing Date:
September 30, 1987
Export Citation:
Assignee:
Sumitomo Chemical Co., Ltd.
International Classes:
C01F7/00; B01J20/34; B01J45/00; B01J49/00; C01G1/00; C01G15/00; C01G33/00; C01G35/00; C01G43/00; C01G49/00; (IPC1-7): B01J49/00; B01J45/00; C01F7/00; C01G15/00; C01G33/00; C01G35/00; C01G43/00; C01G49/00
Domestic Patent References:
| JP48103476A | ||||
| JP61293555A | ||||
| JP6142335A | ||||
| JP61293556A |
Attorney, Agent or Firm:
Mitsuhiro Moroishi (1 person outside)
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