文献类型：期刊文献

英文题名：Cooling crystallization of aluminum sulfate in pure water modulated by sodium dodecylbenzenesulfonate

作者：Sun, Xiaoxue[1];Sun, Yuzhu[1];Yu, Jianguo[1]

机构：[1]E China Univ Sci & Technol, Shanghai 200237, Peoples R China

年份：2015

卷号：50

期号：8

起止页码：682

外文期刊名：CRYSTAL RESEARCH AND TECHNOLOGY

收录：;EI(收录号：20153201112009);WOS:【SCI-EXPANDED(收录号:WOS:000359083600013)】；

基金：This work was financially supported by the National High Technology Research and Development Program of China (863 Program, No. 2011AA06A102),National Natural Science Foundation of China (No. 21306053), Key Project of Scientific Research Innovation of Shanghai Municipal Education Commission (No. 14ZZ063).Fundamental Research Funds for the Central Universities (WB1213008).

语种：英文

外文关键词：Industrial crystallization; aluminum sulfate; sodium dodecylbenzenesulfonate; computer simulation

摘要：This study investigated the cooling crystallization of aluminum sulfate to explore the basic data for the recovery of aluminum resources from coal spoil. Cooling crystallization process of aluminum sulfate with sodium dodecylbenzenesulfonate (SDBS) was investigated experimentally. The effects of operating conditions, namely rotate speed and cooling rate on the crystal size (Median diameter, D-0.5) were studied. Based on single factor experimental results, the response surface method (RSM) with a Box-Behnken design (BBD) was used to determine the key operating conditions, from which a predictive equation was established to quantitatively describe the relationships of D-0.5 and there relative parameters. The optimum operating conditions for cooling crystallization of aluminum sulfate were as follows: rotate speed of 200-300 rpm, cooling rate of 4-5 degrees C /min and n (SDBS)/n (Al-2(SO4)(3)) of around 5E-4. Molecular dynamics (MD) results reveal that SDBS decreases the diffusion coefficient (D) of Al3+ molecules, which inhibits nucleation and promotes crystal growth.