文献类型：期刊文献

英文题名：Purification of phosphoric acid in a gravity wash column

作者：Chen, Aimei[1];Chen, Kui[1];Zhu, Jiawen[1];Wu, Bin[1];Ji, Lijun[1]

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

年份：2013

卷号：91

期号：5

起止页码：944

外文期刊名：CANADIAN JOURNAL OF CHEMICAL ENGINEERING

收录：;EI(收录号：20131516205036);WOS:【SCI-EXPANDED(收录号:WOS:000317302200016)】；

基金：The author gratefully acknowledges the financial support from The Eleventh Five-year National Science and Technology Supporting Major Project (2007BAE58B03) PRC and West Region Project of Shanghai Science and Technology (10195801600).

语种：英文

外文关键词：gravity wash column; mathematical model; phosphoric acid; suspension crystallisation

摘要：A gravity wash column is a common type of continuous solidliquid separator, which can be applied in the final step in the suspension crystallisation process of purifying phosphoric acid. In this work, a mathematical model based on material balance was presented for the purification process in a gravity wash column, and the experimental data of suspension crystallisation of phosphoric acid hemi-hydrate were correlated. The developed purification model can be used to calculate concentration profiles of impurities along the column axis and to predict the effect of operating conditions on the purity of the product stream of phosphoric acid. The model parameters were also estimated by fitting the model with experimental data. (c) 2012 Canadian Society for Chemical Engineering