Title:
使用済鉛蓄電池用正極活物質の再利用処理方法
Document Type and Number:
Japanese Patent JP3987597
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To efficiently remove impure antimony from active material paste, obviate refining of a positive electrode active material, and reuse it with less energy consumption by inputting/agitating positive electrode active material paste for a used lead-acid battery to/in an exudate such as a sulfuric acid, a nitric acid and a tartaric acid, and leaching out an insoluble solid substance. SOLUTION: Positive electrode active material paste for a used lead-acid battery is inputted to and agitated in an exudate composed of a sulfuric acid, a nitric acid, a tartaric acid or a mixed acid of these. Therefore, antimony in the active material paste is exuded by destroying a PbO2 crystal to surround this, and about 95% or more of it can be removed, and an insoluble solid substance composed of a residual lead compound is leached out, and is reused as a positive electrode active material. An oxidizing agent such as persulfuric acid ammonium, a reducing agent such as a hydrogen peroxide, a surfactant such as an alkyl benzene sulfonic acid and a complexing agent particularly to a sulfuric acid, are added to the exudate according to its necessity, and exudation of antimony and recovery of a lead dioxide can be promoted.
Inventors:
Hidefumi Kusaka
Liu Bong
Kimura Isamu
Hiro Se Kyouji
Liu Bong
Kimura Isamu
Hiro Se Kyouji
Application Number:
JP31910196A
Publication Date:
October 10, 2007
Filing Date:
November 29, 1996
Export Citation:
Assignee:
GS Yuasa Corporation
Osaka Lead Tin Smelter Co., Ltd.
Osaka Lead Tin Smelter Co., Ltd.
International Classes:
H01M10/54; C22B7/00; C22B13/00
Domestic Patent References:
| JP62216179A | ||||
| JP62120436A | ||||
| JP56146837A | ||||
| JP5343107A |
Attorney, Agent or Firm:
Aoyama Aoi
Tadataka Omori
Tadataka Omori