电子级IPA微量金属离子吸附分离及其模拟  

Adsorption Separation and Simulation of Trace Metal Ions in Electronic Grade Isopropanol

作　　者：张凯[1] 陈寿天宝 许振良[1,2] 程亮 陈亮[3] 秦磊 ZHANG Kai;CHENSHOU Tianbao;XU Zhenliang;CHENG Liang;CHEN Liang;QIN Lei(State Key Laboratory of Chemical Engineering,Membrane Science and Engineering R&D Center,East China University of Science and Technology,Shanghai 200237,China;Shanghai Innovation Institute of Electronic Chemicals,Shanghai 200237,China;Sinopec Shanghai Research Institute of Petrochemical Technology,Shanghai 201208,China)

机构地区：[1]华东理工大学化学工程联合国家重点实验室,膜科学与工程研发中心,上海200237 [2]上海电子化学品创新研究院,上海200237 [3]中石化(上海)石油化工研究院有限公司,上海201208

出　　处：《华东理工大学学报（自然科学版）》2024年第5期653-658,共6页Journal of East China University of Science and Technology

基　　金：中国石油化工股份有限公司课题(222254);国家重点研发计划(2021YFB3801103)。

摘　　要：研究了树脂对异丙醇(IPA)中微量Na^(+)和K^(+)的静态吸附和动态吸附过程,其等温吸附符合Langmuir吸附模型,动力学吸附符合拟一级动力学模型。利用Aspen Adsorption模拟了树脂对IPA中Na^(+)和K^(+)的动态吸附过程,模拟结果和实验测得的穿透曲线吻合良好。通过离子交换树脂去除IPA中的金属离子,最终金属离子质量浓度均低于5.00μg/L。这些结果为IPA中微量金属离子吸附装置的设计提供了依据。This paper studies the removal of trace metal ions in isopropanol.Sodium-type ion-exchange resin used in the industry is subjected sequentially to acid,alkali and then acid treatment for hydrogenation.Then,the isothermal and kinetic adsorption of Na^(+)and K^(+)by the resin in isopropanol was studied by static adsorption experiments.The isothermal adsorption obtained by origin fitting conforms to the langmuir isothermal adsorption model,and the kinetics adsorption conforms to the pseudo-first-order kinetic model.The maximum adsorption capacities of Na^(+)and K^(+)in isopropanol were calculated to be 4.28 mg/g and 3.36 mg/g,respectively.The breakthrough curves of Na^(+)and K^(+)were obtained by dynamic experiments.The adsorption process was simulated,and an adsorption physical model ignoring pressure drop and temperature change was established.The dynamic adsorption process of Na^(+)and K^(+)in isopropanol was simulated by Aspen Adsorption,and the simulation results were in good agreement with the experimental breakthrough curves.Using the ion-exchange resin,the content of metal ions in isopropanol was detetmined to be less than 5.00μg/L.These results provide a basis for the design of adsorption materials and devices for trace metal ions in isopropanol.In addition,a method of slowly digesting the resin with nitric acid and hydrogen peroxide in a heated environment was proposed.This method can detect the content of metal ions in the resin,and the error between the detection result and the actual value is within 10%.

关 键 词：吸附 Aspen Adsorption 电子级IPA 金属离子 树脂 

分 类 号：TQ425.9[化学工程]