An innovative approach for pseudoboehmite precipitation from seeded sodium aluminate solutions

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	An innovative approach for pseudoboehmite precipitation from seeded sodium aluminate solutions
	Cai, W. Q.; Li, H. Q.; Zhang, G. X.
	2010
会议名称	15th International Symposium on Intercalation Compounds
会议日期	MAY 11-15, 2009
会议地点	Tsinghua Univ, Beijing, PEOPLES R CHINA
关键词	Inorganic compounds Chemical synthesis X-ray diffraction Crystal structure BOEHMITE LIQUOR AREA
期号	4
其他题名	J. Phys. Chem. Solids
页码	515-518
中文摘要	Precipitation of boehmite from seeded sodium aluminate (SA) solutions for production of smelter grade alumina by calcination is in the early stage of development. However, the reported boehmites are usually well crystallized and actually most boehmites for activated aluminas are poorly crystallized and less ordered forms, which is also called pseudoboehmite. In the present study, an attempt has been made to find the appropriate precipitation conditions of pseudoboehmite from seeded SA solutions by inductively coupled plasma optical emission spectrometry (ICP-OES), X-ray diffraction (XRD), and transmission electron microscopy (TEM). It was found that pure pseudoboehmite showing minor morphology difference with the pseudoboehmite seed can be easily obtained under hydrothermal conditions at 373 K not less than 10 h or at 398 K not less than 3 h. The hydrothermal seed precipitation is a dynamic inhibited process that approximately consists of three stages, namely a fast precipitation stage, a slow precipitation stage and an analogously apparent equilibrium stage. However, the seeded precipitation under circulation reflux at approximate 0.1 MPa is not suitable for preparing pure pseudoboehmite because of by-products formation, such as gibbsite, nordstrandite, diaspore, etc. This work demonstrates that pseudoboehmite can be efficiently precipitated from seeded SA solutions under certain hydrothermal conditions. (C) 2009 Elsevier Ltd. All rights reserved.
收录类别	ISTP
会议网址	://WOS:000277055400026
会议录	Journal of Physics and Chemistry of Solids
语种	英语
内容类型	会议论文
源URL	[http://ir.ipe.ac.cn/handle/122111/11069]
专题	过程工程研究所_研究所（批量导入）
推荐引用方式 GB/T 7714	Cai, W. Q.,Li, H. Q.,Zhang, G. X.. An innovative approach for pseudoboehmite precipitation from seeded sodium aluminate solutions[C]. 见:15th International Symposium on Intercalation Compounds. Tsinghua Univ, Beijing, PEOPLES R CHINA. MAY 11-15, 2009.://WOS:000277055400026.