Title:
白金族元素を含有する臭素酸水溶液の処理方法
Document Type and Number:
Japanese Patent JP5835579
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a treating method capable of reducing and decomposing a bromate ion without depositing a platinum group element in a solution and recovering the platinum group element by solvent extraction and ion exchange from the solution obtained after the treatment.SOLUTION: The treating method for a bromic acid aqueous solution suppresses precipitation of the platinum group element and generation of bromine gas, and decomposes the bromate ion by adding the bromic acid aqueous solution containing the platinum group element into a reducing aqueous acid solution. For example, the treating method for the bromic acid aqueous solution uses an aqueous acid solution of hydroxylamine salt, hydrazine, or reduction copper as the reducing aqueous acid solution in such a manner that the bromic acid aqueous solution is added until the pH becomes 4 or less.
More Like This:
Inventors:
Shintaro Nakaya
Satoru Okada
Satoru Okada
Application Number:
JP2012037909A
Publication Date:
December 24, 2015
Filing Date:
February 23, 2012
Export Citation:
Assignee:
Mitsubishi Materials Corporation
International Classes:
C22B11/00; C02F1/70; C22B7/00
Domestic Patent References:
| JP2000317470A | ||||
| JP2012167367A |
Attorney, Agent or Firm:
Hiroshi Chiba