Abstract: Hydroxyethyl acrylate (HEA) is a widely used chemical raw material. With the development of science and technology, the purity requirements of electronic chemicals in the field of integrated circuit semiconductors have reached the electronic level. Therefore, the separation purification process is crucial. However, there is not much research reports about the separation purification of electronic grade HEA. In this work, the ion exchange resin adsorption method is used to remove Na+ and K+ while avoiding the problem of polymerization and reducing the purity of the product in the high-temperature environment of HEA. Na+ and K+ dynamic adsorption model and its characteristics were obtained through the static adsorption experiments of ion exchange resin. The fitting degrees of Langmuir isothermal adsorption model and Freundlich adsorption model were compared. The isothermal adsorption curves and maximum adsorption capacities for Na+ and K+ on the ion exchange resin were obtained. The penetration curves for Na+ and K+ on the ion exchange resin were acquired by the dynamic adsorption experiments. And the dynamic adsorption process was simulated using Aspen Adsorption. The relationship between the working state of resin bed and adsorption time was obtained. The experimental values were good agreements with model values. At the same time, the Langmuir model was better than the Freundlich model. The experimental results showed that the pseudo-first-order kinetic model could be better in line with the actual situation, and the adsorption rate of Na+ was slightly faster than that of K+. The penetration curve was also consistent with characteristics of Na+ that it had faster adsorption speed and penetration speed. The simulation results of Aspen Adsorption showed that the experimental values were consistent with the model values. The adsorption experimental results for industrial grade HEA showed that the removal rates of K+ and Na+ on the ion exchange resin were more than 99%. Therefore, the simulation and experimental results provided relative parameters data supports for the practical application of electronic grade HEA.

Key words: Electronic Grade HEA, Ion exchange resin, Adsorption, Metal Ion, Aspen Adsorption Simulation

摘要： 丙烯酸羟乙酯(HEA)是一种应用广泛的化工原料，目前电子级HEA分离纯化的研究文献报道较少。本工作采用离子交换树脂吸附方式，在去除Na+和K+的同时避免了HEA自身高温环境下发生聚合降低产品纯度的问题。通过树脂静态吸附实验，拟合得到HEA中Na+和K+的动力学模型及特性；通过比较Langmuir等温吸附模型与Freundlich吸附模型的拟合度，选择拟合度更好的Langmuir模型，并由此得到的Langmuir等温吸附线获得Na+与K+树脂最大吸附量。通过动态吸附实验获得Na+及K+在该树脂上的穿透曲线，并通过Aspen Adsorption模拟动态吸附过程，得到床层工作状态与吸附时间的关系，实验值与模型值符合良好。因此，模拟结果为电子级HEA的应用提供了相关参数及数据支持。

关键词: 电子级HEA, 离子交换树脂, 吸附, 金属离子, Aspen Adsorption模拟