Synthesis of Uniformly Spherical Bayerite from a Sodium Aluminate Solution Reacted with Sodium Bicarbonate

被引：14
|
作者：
You, Shaowei [1 ,2 ]
Li, Yan [1 ]
Zhang, Yifei [1 ]
Yang, Chao [1 ]
Zhang, Yi [1 ]
机构：
[1] Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
来源：
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2013年 / 52卷 / 36期
基金：
国家高技术研究发展计划(863计划); 中国国家自然科学基金;
关键词：
CONTINUOUS PRECIPITATION; THERMAL-DECOMPOSITION; CRYSTALLIZATION; AGGLOMERATION; HYDROXIDES; MORPHOLOGY; BOEHMITE; GIBBSITE; TRANSFORMATION; STABILITY;
D O I：
10.1021/ie401353t
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
Bayerite was synthesized successfully by the precipitation reaction of a sodium aluminate solution with sodium bicarbonate in a mixed suspension mixed product removal (MSMPR) crystallizer. The particle size distribution of the prepared bayerite was significantly influenced by the temperature, the stirring speed, and the molar ratio (MR) of Na2Oc/Na2Ok as well as the addition rate of aqueous NaHCO3 solution in the system. The uniformly spherical bayerite with narrow "missing-fines-type" particle size distribution was obtained at 50 degrees C, with the MR of 0.66, at the agitation speed of 300 rpm in the MSMPR crystallizer. The synthesis of bayerite from the reactive NaAl(OH)(4)-NaHCO3 system was without an aging process. The thermal decomposition of the prepared bayerite was analyzed by TGA/DSC and XRD.
引用
收藏
页码：12710 / 12716
页数：7
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