Title:
METHOD FOR PREPARING LOW-IMPURITY ELECTROLYTIC MANGANESE DIOXIDE
Document Type and Number:
WIPO Patent Application WO/2022/205533
Kind Code:
A1
Abstract:
Disclosed in the present invention is a method for preparing low-impurity electrolytic manganese dioxide, comprising: reacting manganese oxide ore powder, pyrite powder, industrial sulfuric acid, and a waste electrolyte; then adding calcium carbonate or extremely fine manganese oxide ore powder to remove iron, and then performing pressure filtration; adding manganese sulfide to the filtrate to remove impurities, and then performing pressure filtration; next, adding manganese fluoride to remove impurities, and performing filtering to obtain an electrolyte; then electrolyzing the obtained semi-finished electrolytic manganese dioxide product, and then performing procedures such as crushing, rinsing, pressure filtration, and drying to obtain a product. According to the method, a semi-finished electrolytic manganese dioxide product is refined, to effectively remove impurities in the product, and thus, low-impurity electrolytic manganese dioxide is obtained.
Inventors:
WU YUANHUA (CN)
HUANG JINGMING (CN)
QIN SHENGXIAN (CN)
XU XIONGXIN (CN)
LUO YONGCHENG (CN)
HUANG JINGMING (CN)
QIN SHENGXIAN (CN)
XU XIONGXIN (CN)
LUO YONGCHENG (CN)
Application Number:
PCT/CN2021/088582
Publication Date:
October 06, 2022
Filing Date:
April 21, 2021
Export Citation:
Assignee:
GUANGXI GUILIU CHEMICAL CO LTD (CN)
International Classes:
C25B1/21; C22B3/08
Domestic Patent References:
| WO2011085438A1 | 2011-07-21 |
Foreign References:
| CN103572316A | 2014-02-12 | |||
| CN111235390A | 2020-06-05 | |||
| CN103572055A | 2014-02-12 | |||
| CN103579608A | 2014-02-12 | |||
| CN103556172A | 2014-02-05 |
Attorney, Agent or Firm:
NANNING SHENZHIYI PATENT AGENCY (SPECIAL GENERAL PARTNERSHIP) (CN)
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