Title:
ブラスト粉からの白金回収方法
Document Type and Number:
Japanese Patent JP5676348
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method for recovering platinum as ammonium chloroplatinate from a blasting powder containing platinum, which improves a recovery rate as a whole by reducing the amount of platinum contained in a filtrate from which ammonium chloroplatinate has been precipitated and separated and eliminating the necessity of further recovering platinum from the filtrate with an ion-exchange resin or activated carbon.SOLUTION: The method for recovering platinum from the blasting powder containing platinum discharged by blasting of apparatus members includes: charging the blasting powder containing platinum into dilute sulphuric acid to dissolve metals other than platinum; filtering the same; dissolving the obtained filtration precipitate in aqua regia or an oxidizing hydrochloric acid solution; and adding ammonium chloride to the resulting solution to recover platinum as a precipitate of ammonium chloroplatinate.
Inventors:
竹田 賢二
松永 直也
大久保 将宗
松永 直也
大久保 将宗
Application Number:
JP2011085206A
Publication Date:
February 25, 2015
Filing Date:
April 07, 2011
Export Citation:
Assignee:
大口電子株式会社
International Classes:
C22B11/00; C22B3/04; C22B3/44; C22B7/00
Attorney, Agent or Firm:
Yamamoto Right clue
Tsujikawa 典範
Tsujikawa 典範