Abstract:

To efficiently separate 3-buten-1-ol from dehydration products of 1,4-butanediol, a batch distillation process was designed in this work. The dehydration products in the batch distillation process were cut into three parts: light components, intermediate components and heavy components according to the composition and properties of the dehydration products. The batch distillation model was established based on the Aspen batch distillation module and the operating parameters were optimized by the uniform experimental design method. The comparison between the experimental and simulation results showed that the Aspen batch distillation module could simulate the batch distillation process of 1,4-butanediol dehydration products. The operating parameters including reflux ratio of light components and intermediate components, column kettle temperature, end condition of light component receiver and intermediate component receiver after optimization were 14.91, 17.00, 180℃, 73.81℃ and 117.69℃, respectively. Using the optimized operating parameters, the batch rectification process yielded 3-buten-1-ol with a purity of 95.1% and a single pass yield of 73.2%, which was 1.9% and 11.3% higher than before optimization. The research results provide a theoretical basis and data support for the industrial implementation of 1,4-dutanediol dehydration to 3-buten-1-ol.

Key words: separation, batchwise, distillation, simulation, optimization

摘要：

为高效分离提纯1,4-丁二醇脱水产物中的3-丁烯-1-醇，本文设计了一种间歇精馏工艺。针对体系组成和性质将其切割为轻组分、中间组分和重组分三部分，并基于Aspen Batch Distillation模块，对间歇精馏过程进行建模，通过均匀设计的思路对操作参数进行了优化。实验与模拟结果比较表明，Aspen Batch Distillation模块可以较好地模拟1,4-丁二醇脱水产物的间歇精馏过程。通过均匀设计对操作参数进行优化，所得的轻组分回流比、中间组分回流比、塔釜温度、轻组分接收器结束条件和中间组分接收器结束条件分别为14.91、17.00、180℃、73.81℃、117.69℃。采用优化后的操作参数，间歇精馏过程可以得到纯度为95.1%、单程收率为73.2%的3-丁烯-1-醇，比优化之前分别提高了1.9%和11.3%。研究结果为1,4-丁二醇脱水制备3-丁烯-1-醇的工业化实施提供了支撑。

关键词: 分离, 间歇, 蒸馏, 模拟, 优化