Title:
セリウム回収方法
Document Type and Number:
Japanese Patent JP4231677
Kind Code:
B2
Abstract:
To provide a method for recovering cerium ions as cerium oxide in good yields from a waste etchant containing chromium ions and cerium ions.
The method comprises a step 1 of adjusting the pH of a waste solution (W) containing cerium ions and chromium ions to 1 to 3, a step 2 of adding a chromium ion adsorptive chelate resin to the waste solution (W) to adsorb chromium ions thereon and filtering off the chelate resin to form a waste solution (X), a step 3 of regenerating the chelating resin, a step 4 of adding oxalic acid to the waste solution (X) to form cerium oxalate, filtering off the product, and washing the filtered product with ion-exchanged water, and a step 5 of firing the cerium oxalate.
COPYRIGHT: (C)2004,JPO
Inventors:
Shoichi Hoshino
Toshio Komatsu
High-end
Maeda Noritaka
Toshio Komatsu
High-end
Maeda Noritaka
Application Number:
JP2002310894A
Publication Date:
March 04, 2009
Filing Date:
October 25, 2002
Export Citation:
Assignee:
The Ink Tech Co., Ltd.
Chikamochi Pure Chemical Co., Ltd.
Chikamochi Pure Chemical Co., Ltd.
International Classes:
C01F17/00; C02F1/58; B01J45/00; C01G37/00; C02F1/62; C02F1/70; C22B3/42; C22B7/00; C22B34/32; C22B59/00; C23F1/46
Domestic Patent References:
| JP2000160136A | ||||
| JP2004107769A | ||||
| JP2004052006A | ||||
| JP2002121628A | ||||
| JP2000087154A | ||||
| JP2000007331A | ||||
| JP11236633A | ||||
| JP11236632A | ||||
| JP11236217A | ||||
| JP4164810A | ||||
| JP2002097458A | ||||
| JP2001358104A |
Attorney, Agent or Firm:
Katsuhiro Yoshida
Toshieko Kondo
Toshieko Kondo