Abstract:

Ethyl levulinate is a potential biomass-based platform compound, which has a wide application in chemical industry. The traditional methods for manufacturing ethyl levulinate are mainly in a batch reactor, which had a low efficiency, difficult in product separation and a long technological process. Therefore, a reactive distillation process in producing ethyl levulinate was proposed. Based on the results of pilot-scale experiments, the reactive distillation technological process was established using Aspen Plus simulation software, the key parameters, such as reflux ratio, feeding position, feed mole ratio and theoretical stage numbers were investigated, and the optimal configuration for the synthesis of ethyl levulinate using conventional reactive distillation technology was obtained. In order to obtain ethyl levulinate with a purity higher than 99.9%, the double column reactive distillation purification process and the reactive dividing-wall distillation process were further proposed, and through the comparison of product purity and energy consumption of these two processes, the effectiveness of reactive dividing-wall distillation process in producing ethyl levulinate was verified and its energy saving effect was demonstrated.

Key words: reactive distillation dividing wall column, reactive distillation, optimization, simulation

摘要：

乙酰丙酸乙酯是一种潜在的生物质基平台化合物，在工业上具有很高的应用价值。乙酰丙酸乙酯传统的生产方法主要为间歇反应法，效率较低，产物分离困难且工艺流程较长。因此，本文提出了反应精馏工艺生产乙酰丙酸乙酯，在以中试实验结果为依据的基础上，使用Aspen Plus模拟软件建立了工艺流程，并考察了回流比、进料位置、进料摩尔比以及理论塔板数等关键参数，得到了常规单塔反应精馏工艺生产乙酰丙酸乙酯的最优配置。而后，为了得到纯度大于99.9%的乙酰丙酸乙酯，本文进一步提出了反应精馏双塔精制流程以及反应精馏隔壁塔流程，并通过对两种流程所得到的产品纯度以及能耗的对比，验证了反应精馏隔壁塔工艺生产乙酰丙酸乙酯的有效性以及在节能方面较大的优势。

关键词: 反应精馏隔壁塔, 反应精馏, 优化, 模拟