Title:
METHOD FOR PREPARING HIGH-PURITY TIO2 BY SELECTIVELY LEACHING FROM TITANIUM CONCENTRATE WITH RICH OXYGEN
Document Type and Number:
WIPO Patent Application WO/2019/137543
Kind Code:
A1
Abstract:
A method for preparing high-purity TiO2 by selectively leaching from titanium concentrate with rich oxygen, comprising the following steps: (1) crushing and activating titanium concentrate, placing the raw materials in an autoclave for alkali leaching using a sodium hydroxide solution; introducing oxygen into the autoclave before the alkali leaching, and then heating and stirring; (2) performing filtration and separation, and washing the alkali decomposition product with water to prepare an alkali decomposition residue; (3) performing acid leaching on the alkali decomposition residue and hydrolyzing same, adding seed crystal, and then the heating and stirring; (4) performing filtration and separation, washing the acid leaching residue with water, drying said residue and calcining same at 800-900°C so as to prepare rutile-type high-purity TiO2. According to the method, high-performance materials can be prepared easily; resource recycling can be achieved; the energy can be saved; and the emission can be reduced.
Inventors:
DOU ZHIHE (CN)
ZHANG TINGAN (CN)
LIU YAN (CN)
ZHANG ZIMU (CN)
WANG YANXIU (CN)
ZHANG TINGAN (CN)
LIU YAN (CN)
ZHANG ZIMU (CN)
WANG YANXIU (CN)
Application Number:
PCT/CN2019/071693
Publication Date:
July 18, 2019
Filing Date:
January 15, 2019
Export Citation:
Assignee:
UNIV NORTHEASTERN (CN)
International Classes:
C22B34/12; C22B3/04; C22B3/10; C22B3/12; C22B34/00
Foreign References:
| CN108300875A | 2018-07-20 | |||
| CN102786082A | 2012-11-21 | |||
| CN103834812A | 2014-06-04 | |||
| CN103723765A | 2014-04-16 | |||
| US3647414A | 1972-03-07 |
Attorney, Agent or Firm:
SHENYANG DONGDA INTELLECTUAL PROPERTY AGENCY CO., LTD (CN)
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