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Potentially More Ecofriendly Chemical Pathway for Production of High-Purity TiO2 from Titanium Slag
Zhu, Xiaofang1,2; Zheng, Shili1; Zhang, Ying1; Fang, Zhigang Zak3; Zhang, Min4; Sun, Pei3; Li, Qing1; Zhang, Yang1; Li, Ping1; Jin, Wei1
2019-03-04
Source PublicationACS SUSTAINABLE CHEMISTRY & ENGINEERING
ISSN2168-0485
Volume7Issue:5Pages:4821-4830
AbstractTiO2 is an important inorganic material which is commercially produced by either the chloride or the sulfate process. In general, the latter has lower cost and a lower entry barrier than the former. However, the environmental impact associated with the sulfate process is more visible than the chloride process because the sulfuric acid with a low concentration (similar to 20 wt %) cannot be cost-effectively recycled; therefore, it has to be neutralized, generating a large amount of wet and useless red gypsum (RG). In this research, a potentially more ecofriendly chemical pathway for TiO2 production from concentrated titanium ore, aka titania slag, is presented. The new method consists of three critical steps including transformation of the titania slag to a lower-valence titanium suboxide by aluminothermic reduction, digestion by using mild acid, and controlled hydrolysis accompanied by acid recycling. As a result of the phase transformation, the digestion of titanium from the titanium feedstock becomes easier such that it is feasible to use relatively mild acid to replace concentrated acid, reducing the environmental impact from the red gypsum because the need for neutralizing the waste acid can be eliminated. High-purity hydrous TiO2 can be prepared after hydrolysis, and the spent liquor can be effectively recycled back to the digestion unit.
KeywordTitanium dioxide Titania slag Aluminothermic reduction Mild acid digestion Controlled hydrolysis
DOI10.1021/acssuschemeng.8b05102
Language英语
WOS KeywordSURFACE-TENSION ; DIOXIDE ; MG ; REDUCTION ; BROOKITE ; ALUMINUM ; KINETICS ; REMOVAL ; ENERGY ; SYSTEM
Funding ProjectNatural Science Foundation of China[51771179] ; Beijing Municipal Natural Science Foundation[2192056] ; CAS Interdisciplinary Innovation Team ; State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization ; ARPA-E of the US DOE[DE-AR0000420]
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Engineering
WOS SubjectChemistry, Multidisciplinary ; Green & Sustainable Science & Technology ; Engineering, Chemical
Funding OrganizationNatural Science Foundation of China ; Beijing Municipal Natural Science Foundation ; CAS Interdisciplinary Innovation Team ; State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization ; ARPA-E of the US DOE
WOS IDWOS:000460600500028
PublisherAMER CHEMICAL SOC
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/28302
Collection中国科学院过程工程研究所
Corresponding AuthorZhang, Ying
Affiliation1.Chinese Acad Sci, Key Lab Green Proc & Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Inst Proc Engn, 1,Bei Er Jie, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, 19,Yuquan Rd, Beijing 100049, Peoples R China
3.Univ Utah, Dept Met Engn, Room 412,135 S 1460 E, Salt Lake City, UT 84112 USA
4.Foshan Univ, Coll Mat Sci & Energy Engn, 18,Jiangwan 1 Rd, Foshan 528000, Guangdong, Peoples R China
Recommended Citation
GB/T 7714
Zhu, Xiaofang,Zheng, Shili,Zhang, Ying,et al. Potentially More Ecofriendly Chemical Pathway for Production of High-Purity TiO2 from Titanium Slag[J]. ACS SUSTAINABLE CHEMISTRY & ENGINEERING,2019,7(5):4821-4830.
APA Zhu, Xiaofang.,Zheng, Shili.,Zhang, Ying.,Fang, Zhigang Zak.,Zhang, Min.,...&Jin, Wei.(2019).Potentially More Ecofriendly Chemical Pathway for Production of High-Purity TiO2 from Titanium Slag.ACS SUSTAINABLE CHEMISTRY & ENGINEERING,7(5),4821-4830.
MLA Zhu, Xiaofang,et al."Potentially More Ecofriendly Chemical Pathway for Production of High-Purity TiO2 from Titanium Slag".ACS SUSTAINABLE CHEMISTRY & ENGINEERING 7.5(2019):4821-4830.
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