Title:
ロジウム精製廃液からのロジウム回収方法
Document Type and Number:
Japanese Patent JP5772628
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method for recovering rhodium by which the rhodium can be effectively and selectively recovered as a crystal using wet treatment from a nitrous acid neutralization filtrate and loss of the rhodium due to repetition to a refining process can be suppressed.SOLUTION: A method for recovering rhodium from rhodium refining waste liquid is a method for recovering the rhodium from a nitrite neutralization filtrate in a waste liquid generated in a refining process of the rhodium, the rhodium is separated and recovered as crystal of hexanitrorhodium (III) acid ammonium by adding ammonium chloride in a ratio of 20-30 g/l to the nitrite neutralization filtrate. In this case, the crystal of the hexanitrorhodium (III) acid sodium naturally deposited in the nitrite neutralization filtrate before adding the ammonium chloride, is separated and recovered as it is, together with the crystal of the hexanitrorhodium (III) acid ammonium.
Inventors:
Hidemasa Nagai
Hideaki Sato
Yoshiaki Manabe
Yasushi Isshiki
Hideaki Sato
Yoshiaki Manabe
Yasushi Isshiki
Application Number:
JP2012014971A
Publication Date:
September 02, 2015
Filing Date:
January 27, 2012
Export Citation:
Assignee:
Sumitomo Metal Mining Co., Ltd.
International Classes:
C22B11/00; C02F1/62; C22B3/44
Domestic Patent References:
| JP51149820A | ||||
| JP2011093748A | ||||
| JP2005256164A |
Attorney, Agent or Firm:
Masao Yamamoto
Noriyuki Tsujikawa
Noriyuki Tsujikawa