文献类型：期刊文献

英文题名：Progressive freezing and suspension crystallization methods for tetrahydrofuran recovery from Grignard reagent wastewater

作者：Yin, Yao[1];Yang, Yuhang[1];Mendoza, Maria de Lourdes[2];Zhai, Shengyong[3];Feng, WanLi[1];Wang, Yiqiao[1];Gu, Meng[1];Cai, Lankun[1];Zhang, Lehua[1]

机构：[1]East China Univ Sci & Technol, State Environm Protect Key Lab Environm Risk Asse, Sch Resources & Environm Engn, Shanghai 200237, Peoples R China;[2]Coastal Polytech Sch, ESPOL, Environm & Chem Sci Dept DCQA, FCNM, Campus Gustavo Galindo, Guayaquil, Ecuador;[3]Changchun Univ Chinese Med, Chinese Med & Biol Engn Res & Dev Ctr, Changchun 130117, Peoples R China

年份：2017

卷号：144

起止页码：180

外文期刊名：JOURNAL OF CLEANER PRODUCTION

收录：;EI(收录号：20170503309272);WOS:【SCI-EXPANDED(收录号:WOS:000393249300018)】；

基金：This work was supported by the National Natural Science Foundation of China (NSFC) (20906026, 51273196) and Shanghai Pujiang Program (09PJ1402900).

语种：英文

外文关键词：Progressive freezing treatment; Suspension crystallization method; Tetrahydrofuran (THF) wastewater; THF recovery

摘要：Freezing methods, progressive freezing and suspension crystallization, were examined for treating Grignard reagent wastewater containing tetrahydrofuran (THF) used as a solvent. The effect of freezing temperature, addition of seed ice crystals, and stirring speed on performance were investigated. The addition of seed ice with appropriate temperature contributed to enhance the purity. The optimal operating conditions of freezing temperature and stirring speed were -6 degrees C and 300 rpm respectively while the removal efficiency of COD was above 90%. The suspension crystallization is superior to progressive freezing in terms of performance and energy consumption, with an estimation of about 38.26 kW h per ton of wastewater treated. Based on these results, a freezing/concentration concept for THF recovery from Grignard reagent wastewater is proposed. (C) 2017 Elsevier Ltd. All rights reserved.