文献类型：期刊文献

英文题名：Coupled reaction and solvent extraction process to utilize distiller waste using N235-isoamylol system

作者：Dai, Chaoyan[1,2];Chen, Hang[1,3];Song, Xingfu[1,2];Yu, Jianguo[1,2]

机构：[1]East China Univ Sci & Technol, Engn Res Ctr Resource Proc Engn, Minist Educ, Shanghai, Peoples R China;[2]East China Univ Sci & Technol, Natl Engn Res Ctr Integrated Utilizat Salt Lake R, Shanghai, Peoples R China;[3]Shanghai Inst Pollut Control & Ecol Secur, Shanghai, Peoples R China

年份：2024

卷号：46

期号：1

起止页码：10185

外文期刊名：ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS

收录：;EI(收录号：20202708901615);WOS:【SCI-EXPANDED(收录号:WOS:000547688800001)】；

基金：The authors are grateful for the financial support from the National Key R&D Program of China [No. 2018YFB0605703] and Program of Shanghai Academic/Technology Research Leader [No. 18XD1424600].

语种：英文

外文关键词：Distiller waste; N235; reaction extraction; single-factor optimization; counter-current operation

摘要：Distiller waste produced from the Solvay Process, which mainly contains calcium chloride (CaCl2), is being discharged and has not yet been fully recycled. In this study, a coupled reaction and solvent extraction process was adopted to utilize distiller waste using the mixed organic solvent composed of N235 and isoamylol. High purity and good crystallinity calcite with an average of 40 similar to 50 mu m were prepared in this process. The effect of operation conditions was firstly studied and the conversion rate of CaCl(2)reached 83.40% in single-stage with the optimized conditions: reaction time of 3 h, N235/isoamylol volume ratio of 1, reaction temperature of 25 degrees C, N235/CaCl(2)molar ratio of 3, and the initial CaCl(2)concentration of 1 mol center dot L-1. The enthalpy change of the overall reaction was -89.93 kJ center dot mol(-1). Then, the phase equilibrium was measured and the theoretical extraction stage was predicted to be 3 with the target conversion rate of 90%. Three-stage counter-current extraction process showed that about 93.75% CaCl(2)was mineralized into CaCO(3)and the results had a good agreement with the McCabe-Thiele calculation. This indicated that multi-stage counter-current extraction can effectively improve the conversion rate of Ca(2+)and related result was of great significance in treating distiller waste industrially.