高校化学工程学报2023，Vol.37Issue(6)：917-924,8.DOI:10.3969/j.issn.1003-9015.2023.06.006
配位体交换树脂分离乙醇酸中无机盐的性能及过程模拟
Performance and process simulation of ligand exchange resins for inorganic salt separation from glycolic acid solutions
摘要
Abstract
Effects of central metal ions on the performance of a ligand exchange resin in removing NaCl from a glycolic acid solution were studied.Parameter estimation methods and fitting of the simulation model were evaluated to explore resin performance,mass transfer characteristics and model applicability.The results show that the strong acidic cation-exchange resin loaded with Ca2+or Cu2+ can effectively separate glycolic acid(GA)and NaCl.The resolution of the Ca-type resin is 1.28,while the column efficiency is 94.7.The M-Langmuir model can simulate the dynamic adsorption isotherms of GA and NaCl.When the column bed temperature rose from 35℃to 65℃,KH,GA and KH,NaCl decreased from 0.916 to 0.775 and 0.314 to 0.288,respectively.Dax and kL can be determined by combining the empirical and the inverse methods,which is better used to simulate the breakthrough and elution curves of GA and NaCl with Transport Dispersive model.Variation of feed concentration has limited effects on Dax,and Dax,GA and Dax,NaCl are around 0.343 cm2·min-1 and 1.048 cm2·min-1,respectively.With the increase of feed concentration,kL,GA and kL,NaCl decrease from 0.012 5 cm·min-1 to 0.011 7 cm·min-1 and from 0.050 9 cm·min-1 to 0.036 1 cm·min-1,respectively,and the mass transfer coefficient decreases.关键词
配位体交换树脂/乙醇酸/NaCl/分离效能/过程模拟Key words
ligand exchange resin/glycolic acid/NaCl/separation performance/process simulation分类
化学化工引用本文复制引用
张军伟,刘月朗,孙震,陈建军..配位体交换树脂分离乙醇酸中无机盐的性能及过程模拟[J].高校化学工程学报,2023,37(6):917-924,8.基金项目
国家自然科学基金(21307042) （21307042）
江苏省博士后基金(1601073B). （1601073B）
