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Title:
METHOD FOR PRODUCING ZINC OXIDE BY MEANS OF DOUBLE LEACHING
Document Type and Number:
WIPO Patent Application WO/2020/019854
Kind Code:
A1
Abstract:
A method for producing zinc oxide by means of double leaching, comprising a primary leaching step, an optional purification step, a first precipitation step, a second precipitation step, a primary calcination step, a secondary leaching step, a crystallization step under increased pressure, a decomposition step under reduced pressure, an optional rinsing step, and a secondary calcination step.

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Inventors:
YUE HUIWEI (CN)
LI SHICHUAN (CN)
LONG ZHONGXIANG (CN)
JIANG TAO (CN)
LIU QUANFENG (CN)
Application Number:
PCT/CN2019/088490
Publication Date:
January 30, 2020
Filing Date:
May 27, 2019
Export Citation:
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Assignee:
CHONGQING DONGQUN TECH CO LTD (CN)
International Classes:
C01G9/02; C22B3/14; C22B3/44; C22B19/20; C22B19/34
Foreign References:
CN108866331A2018-11-23
CN108862370A2018-11-23
CN108622927A2018-10-09
CN108913887A2018-11-30
CN88102610A1988-12-28
CN1055766A1991-10-30
JPS4738754B11972-09-30
CN107099672A2017-08-29
CN103145176A2013-06-12
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