化工进展 ›› 2024, Vol. 43 ›› Issue (12): 6634-6644.DOI: 10.16085/j.issn.1000-6613.2023-2127

• 化工过程与装备 • 上一篇    

T型微反应器中合成脂肪酸甲酯磺酸盐动力学及工艺优化

胡恒(), 徐娜(), 李梓良, 于嘉朋, 李旭, 张玮()   

  1. 太原理工大学化学工程与技术学院,化学产品工程山西省重点实验室,山西 太原 030024
  • 收稿日期:2023-12-01 修回日期:2024-01-15 出版日期:2024-12-15 发布日期:2025-01-11
  • 通讯作者: 张玮
  • 作者简介:胡恒(1999—),男,硕士研究生,研究方向为化工过程建模与优化。E-mail:2338677295@qq.com
    徐娜(1983—),女,副教授,硕士生导师,研究方向为多相流传热传质及其强化。E-mail: naxu_xjtu@163.com
  • 基金资助:
    国家自然科学基金(22178241);化学工程联合国家重点实验室开放课题(SKL-ChE-21A01)

Kinetics and process optimization of synthesis of methyl ester sulfonate in T-type microreactor

HU Heng(), XU Na(), LI Ziliang, YU Jiapeng, LI Xu, ZHANG Wei()   

  1. Shanxi Key Laboratory of Chemical Product Engineering, College of Chemical Engineering and Technology, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China
  • Received:2023-12-01 Revised:2024-01-15 Online:2024-12-15 Published:2025-01-11
  • Contact: ZHANG Wei

摘要:

降膜反应器合成脂肪酸甲酯磺酸盐存在内部温度分布不均、产率下降的问题。基于微反应器高效反应特性,本文尝试在T型微反应器中合成脂肪酸甲酯磺酸盐。考察了磺化反应过程中温度、摩尔比、老化时间、老化温度等因素对产物中活性物含量(产物中活性物的质量分数)的影响,采用响应面法探究各因素对活性物含量影响强弱顺序及交互作用,并在此基础上进行工艺条件优化。分析得出,各因素对活性物含量影响由强到弱的顺序为:三氧化硫与硬脂酸甲酯摩尔比>老化温度>磺化温度>老化时间。优化结果显示,当磺化温度为86.4℃、SO3与硬脂酸甲酯摩尔比为1.4、老化时间为47min、老化温度为90℃时,产品活性物含量达88.1%,相比工业合成提高了5%左右。建立了微反应器体系下脂肪酸甲酯SO3磺化反应的动力学方程式,拟合出动力学相关参数,为实现工艺过程可控、产物预测及反应器结构优化提供依据。采用NSGA2算法对工艺进行双目标优化,结合TOPSIS方法从Pareto解集中选出最佳工艺方案。

关键词: 微反应器, 气液磺化反应, 响应面法, 反应动力学, 优化设计

Abstract:

The internal temperature distributes unevenly for the synthesis of methyl ester sulfonate in falling film reactor, leading to the decrease in productivity. Considering the efficient reaction characteristics of microreactor, the present paper attempted to synthesize methyl ester sulfonate in a T-type microreactor. The effects of temperature, molar ratio, aging time, aging temperature and other factors on the content of active substances of the product (the mass fraction of the active content of the product ) in the sulfonation reaction process were investigated. The response surface method was used to explore the influence degree and interaction of the above influencing factors on the content of active substances, and the process conditions were optimized on this basis. According to the analysis, the influence order of above factors on the content of active substances was: molar ratio of sulfur trioxide to methyl stearate>aging temperature>sulfonation temperature>aging time. The optimization results showed that when the sulfonation temperature was 86.4℃, the molar ratio of SO3 to methyl stearate was 1.4, the aging time was 47min and the aging temperature was 90℃, the active content of the product was 88.1%, which was about 5% higher than that of industrial synthesis. The kinetic equation of SO3 sulfonation reaction of methyl ester in microreactor system was established and the kinetic parameters were fitted, which provided the basis for the process control, product prediction and reactor structure optimization. The NSGA2 algorithm was used to proceed double-target optimization for the reaction process, and combing the TOPSIS method, the best process conditions were selected from the Pareto solution set.

Key words: microreactor, gas-liquid sulfonation reaction, response surface method, reaction kinetics, optimal design

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