基于多不饱和脂肪酸酯体系热敏感和组成复杂的特点，提出了隔板塔提纯精制的工艺流程。该工艺不仅可以减少物料的加热次数，降低产品分解率，而且减少设备数量，降低设备投资。通过对小试实验数据和模拟计算数据进行比较，总体误差在4%以内，验证了热力学模型的可靠性。通过将COSMO-SAC模型和Aspen Plus程序结合镶嵌，建立了完善的计算程序，大大提高了工作效率。将隔板塔工艺和常规工艺进行了比较，隔板塔工艺可以节能26%。

Based on the thermal sensitivity and complex composition characteristics of polyunsaturated fatty acid ester system, a purifying-refining process using dividing-wall column is presented.This process can not only reduce the heating times of materials and the decomposition rate of products, but also reduce the number of equipment and the investment in equipment.By comparing experimental data with simulation data, overall error is less than 4%, which verifies the reliability of thermodynamic model.By combining COSMO-SAC model with Aspen Plus program, a perfect calculation program is established, which improves greatly the working efficiency.Compared with conventional distillation process, this dividing-wall process can save energy by 26%.