The formation mechanism of Al-13 and its purification with an   ethanol-acetone fractional precipitation method

doi:10.1016/j.seppur.2011.08.025

CORC > 北京大学 > 环境科学与工程学院

	The formation mechanism of Al-13 and its purification with an ethanol-acetone fractional precipitation method
	Zhao, Hua-Zhang ; Wang, Hong-Yu ; Dockko, Seok ; Zhang, Yan
刊名	separation and purification technology
	2011
关键词	Polyaluminum chloride Al species Fractional precipitation Purification Separation AL13 TRIDECAMERIC POLYCATION ALUMINUM HYBRID COAGULANTS NUCLEAR-MAGNETIC-RESONANCE POLYALUMINUM CHLORIDE AQUEOUS-SOLUTIONS AL-27 HYDROLYSIS SEPARATION SPECIATION REMOVAL
DOI	10.1016/j.seppur.2011.08.025
英文摘要	The formation mechanism of Al-13 is discussed via the investigation of the distribution and transformation of Al-13 in the precipitate and in the solution during the preparation of polyaluminum chloride (PACl). After the NaOH is injected into the AlCl3 solution, the monomeric Al-a species reacts with OH- immediately to form the high-molecular-weight Al-c species, which may exist either in the solution or in the precipitate, depending on the system temperature and the rate of base injection. Subsequently, the Al-c species reacts with Ala to generate the medium-molecular-weight Al-b species, i.e., Al-13. The Al-13 species can be separated and purified from PACl solutions with an ethanol-acetone fractional precipitation method. The results from ferron assay and liquid- and solid-state Al-27 NMR show that the purity and the extraction yield of the extracted Al-13 depend on the initial Al-13 concentration. A higher Al-13 content in the initial PACl solution leads to higher Al-13 purity and to a higher extraction yield. A maximum purity of 99.5% for Al-13 can be achieved by the described ethanol-acetone precipitation method. (C) 2011 Elsevier B.V. All rights reserved.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000296003200025&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Engineering, Chemical; SCI(E); EI; 5; ARTICLE; 3; 466-471; 81
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/158405]
专题	环境科学与工程学院
推荐引用方式 GB/T 7714	Zhao, Hua-Zhang,Wang, Hong-Yu,Dockko, Seok,et al. The formation mechanism of Al-13 and its purification with an ethanol-acetone fractional precipitation method[J]. separation and purification technology,2011.
APA	Zhao, Hua-Zhang,Wang, Hong-Yu,Dockko, Seok,&Zhang, Yan.(2011).The formation mechanism of Al-13 and its purification with an ethanol-acetone fractional precipitation method.separation and purification technology.
MLA	Zhao, Hua-Zhang,et al."The formation mechanism of Al-13 and its purification with an ethanol-acetone fractional precipitation method".separation and purification technology (2011).