Potentially More Ecofriendly Chemical Pathway for Production of High-Purity TiO2 from Titanium Slag

doi:10.1021/acssuschemeng.8b05102

	Potentially More Ecofriendly Chemical Pathway for Production of High-Purity TiO2 from Titanium Slag
	Zhu, Xiaofang 1,2; Zheng, Shili 1; Zhang, Ying 1; Fang, Zhigang Zak 3; Zhang, Min 4; Sun, Pei 3; Li, Qing 1; Zhang, Yang 1; Li, Ping 1; Jin, Wei 1
刊名	ACS SUSTAINABLE CHEMISTRY & ENGINEERING
	2019-03-04
卷号	7 期号:5 页码:4821-4830
关键词	Titanium dioxide Titania slag Aluminothermic reduction Mild acid digestion Controlled hydrolysis
ISSN号	2168-0485
DOI	10.1021/acssuschemeng.8b05102
英文摘要	TiO2 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.
资助项目	Natural 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关键词	SURFACE-TENSION ; DIOXIDE ; MG ; REDUCTION ; BROOKITE ; ALUMINUM ; KINETICS ; REMOVAL ; ENERGY ; SYSTEM
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Engineering
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000460600500028
资助机构	Natural 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
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/28302]
专题	中国科学院过程工程研究所
通讯作者	Zhang, Ying
作者单位	1.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
推荐引用方式 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.