Separation of V (V) and Mo (VI) in roasting-water leaching solution of spent hydrodesulfurization catalyst by co-extraction using P507-N235 extractant

doi:10.1016/j.seppur.2020.117135

	Separation of V (V) and Mo (VI) in roasting-water leaching solution of spent hydrodesulfurization catalyst by co-extraction using P507-N235 extractant
	Li, Hailong 1,2; Feng, Yali 2; Wang, Hongjun 1,2; Li, Haoran 1; Wu, Hao 2
刊名	SEPARATION AND PURIFICATION TECHNOLOGY
	2020-10-01
卷号	248 页码:8
关键词	Spent hydrodesulfurization catalyst Vanadium (V) Molybdenum (VI) Co-extraction Thermodynamics
ISSN号	1383-5866
DOI	10.1016/j.seppur.2020.117135
英文摘要	P507 (2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester) - N235 (trioctyl tertiary amine), diluted with kerosene, was used for separation of vanadium (V) and molybdenum (VI) from roasting-water leaching solution generated by spent hydrodesulfurization catalyst. Due to the leach solutions contain impurities like aluminum (Al) and magnesium (Mg), the effects of various conditions on the separation of V (V), Mo (VI), Al and Mg were investigated. Upon using 20% P507 - N235 (P507: N235 = 2:1) (v/v) as the extractant, kerosene as the diluent and 5% tributyl phosphate (v/v) as the phase modifier, 94.81% V (V) and 95.78% Mo (VI) were obtained in a phase ratio (O/A) of 2 (7 min at 298.15 K in a single-stage contract) and aqueous pH of 1.8. After a two-stage of countercurrent extraction, over 99% V (V) and Mo (VI) were extracted while less than 1% Al and Mg were co-extracted. Upon a three-stage countercurrent stripping with 2.5 mol/L sulfuric acid at a phase ratio (O/A) of 2, the complete removal of vanadium (V) from the loaded organic phase could be achieved. In the selective stripping of molybdenum (VI), almost all of the molybdenum (VI) was stripped after two-stage countercurrent stripping using 2.5 mol/L ammonia. Both oxide components of vanadium and molybdenum can be achieved by further processing of stripped solutions, respectively. In addition, thermodynamic calculations showed that vanadium (V) extraction from the roasting-water leaching solution using P507 - N235 is an irreversible, exothermic reaction at 298.15 - 338.15 K.
资助项目	China Ocean Mineral Resource RD Association[DY135-B2-15] ; Major science and technology program for water pollution control and treatment[2015ZX07205-003] ; National Natural Science Foundation of China[21176242] ; National Natural Science Foundation of China[21176026]
WOS关键词	SULFURIC-ACID-SOLUTION ; SOLVENT-EXTRACTION ; MOLYBDENUM VI ; STONE COAL ; SULFATE-SOLUTIONS ; LIX 63 ; VANADIUM ; RECOVERY ; IRON ; MANGANESE
WOS研究方向	Engineering
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000538827600096
资助机构	China Ocean Mineral Resource RD Association ; Major science and technology program for water pollution control and treatment ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/41106]
专题	中国科学院过程工程研究所
通讯作者	Feng, Yali; Wang, Hongjun
作者单位	1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Biochem Engn, Beijing 100190, Peoples R China 2.Univ Sci & Technol Beijing, Civil & Resource Engn Sch, Beijing 100083, Peoples R China
推荐引用方式 GB/T 7714	Li, Hailong,Feng, Yali,Wang, Hongjun,et al. Separation of V (V) and Mo (VI) in roasting-water leaching solution of spent hydrodesulfurization catalyst by co-extraction using P507-N235 extractant[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2020,248:8.
APA	Li, Hailong,Feng, Yali,Wang, Hongjun,Li, Haoran,&Wu, Hao.(2020).Separation of V (V) and Mo (VI) in roasting-water leaching solution of spent hydrodesulfurization catalyst by co-extraction using P507-N235 extractant.SEPARATION AND PURIFICATION TECHNOLOGY,248,8.
MLA	Li, Hailong,et al."Separation of V (V) and Mo (VI) in roasting-water leaching solution of spent hydrodesulfurization catalyst by co-extraction using P507-N235 extractant".SEPARATION AND PURIFICATION TECHNOLOGY 248(2020):8.