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首页> 外文期刊>Separation and Purification Technology >Reversible reaction-assisted intensification process for separating ethanediol and 1, 2-butanediol: Competitive kinetics study and conceptual design
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Reversible reaction-assisted intensification process for separating ethanediol and 1, 2-butanediol: Competitive kinetics study and conceptual design

机译：用于分离乙二醇和1,2-丁二醇的可逆反应辅助强化方法：竞争动力学研究和概念设计

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摘要

Reversible reaction-assisted technology for ethanediol (EG) and 1, 2-butanediol(1,2-BDO) azotropic mixture separation was proved effective. However, the missing acetalization kinetic parameters hinder the process design and industrialization. This paper addresses the competitive kinetics of EG and 1,2-BDO mixture towards propyl aldehyde. The reaction mechanism was illustrated, and the impacts of feed composition, temperature and solution inhomogeneity were explored. The pseudo-homogeneous model was derived for the system, and the kinetic parameters were obtained. Results demonstrated that the aldehyde and 2-ethyl-1,3-dioxione (2ED) inputs were crucial manipulation variables for reversible reaction-assisted separating (RRAS) process design. The RRAS process was proposed, based on the competitive kinetics, to evaluate the techno-economic performance of RRAS. Two promising processes, which differed in the conversion of EG, were proposed to implement the separation. The economic evaluation revealed that the flowsheet with EG and 1,2-BDO both being converted to acetals and EG then being recovered through 2ED hydrolyzation, has more potential for industrial application.
机译：证明有效的乙二醇（例如）和1,2-丁二醇（1,2-BDO）偶氮二醇分离的可逆反应辅助技术。然而，缺失的缩醛化动力学参数阻碍了工艺设计和工业化。本文将EG和1,2-BDO混合物朝向丙基醛的竞争性动力学解决。探索了反应机理，探讨了饲料组合物，温度和溶液不均匀性的影响。衍生伪均相模型，用于该系统，获得动力学参数。结果证明醛和2-乙基-1,3-二恶英（2ED）输入是可逆反应辅助分离（RRA）工艺设计的关键操纵变量。 RRAS过程基于竞争性动力学提出，以评估RRA的技术经济表现。提出了两个有前途的过程，其转换在例如例如，转换为实施分离。经济评价显示，具有例如1,2-BDO的流量曲线均被转化为缩醛，例如通过2ED水解回收，具有更多的工业应用潜力。

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