Title:
金粉の製造方法
Document Type and Number:
Japanese Patent JP7006332
Kind Code:
B2
Abstract:
To provide a manufacturing method of gold dust capable of suppressing contamination of impurities caused by local rise of pH at a reduction time of gold without using urea, and obtaining a high rate of reduction of gold.SOLUTION: In a method for manufacturing gold dust by performing a reduction treatment by adding water and, preferably, a reductant comprising oxalic acid, into an organic solvent such as dibutyl-carbitol containing tetrachloroaurate ion obtained by performing an extraction treatment to leachate obtained by leaching copper electrolytic slime by gaseous chlorine, adjustment is carried out so that a value determined by dividing a volume of water by a volume of the organic solvent becomes 0.5 or more.SELECTED DRAWING: Figure 1
Inventors:
Takayuki Nakai
Hidemasa Nagai
Satoshi Matsubara
Hidemasa Nagai
Satoshi Matsubara
Application Number:
JP2018018304A
Publication Date:
January 24, 2022
Filing Date:
February 05, 2018
Export Citation:
Assignee:
Sumitomo Metal Mining Co., Ltd.
International Classes:
B22F9/24; C22B3/10; C22B3/26; C22B7/00; C22B11/00
Domestic Patent References:
| JP2015105413A |
Attorney, Agent or Firm:
Norihisa Tsujikawa