Conceptual Design of a Novel Process for the Production of Poly(oxymethylene) Dimethyl Ethers from Formaldehyde and Methanol,Industrial & Engineering Chemistry Research

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Conceptual Design of a Novel Process for the Production of Poly(oxymethylene) Dimethyl Ethers from Formaldehyde and Methanol
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2017-09-26 00:00:00 , DOI: 10.1021/acs.iecr.7b02314
Niklas Schmitz ₁ , Eckhard Ströfer ₁ , Jakob Burger ₁ , Hans Hasse ₁

Affiliation

Poly(oxymethylene) dimethyl ethers (OME) are environmentally benign alternative fuels. This work presents the conceptual design of a novel OME process which employs aqueous solutions of formaldehyde and methanol as feedstock. In this process, OME of the desired chain lengths n = 3–5 and water are separated from the reactive mixture (formaldehyde + water + methanol + methylal + OME). Thermodynamic limits are identified by studying distillation boundaries and chemical equilibria. By that it is shown that OME of chain lengths n = 3–5 can be separated from the reactor outlet by distillation. The separation of water is carried out using either an adsorption or a membrane process. Adsorption isotherms of water on Zeolite 3A are determined experimentally. The OME process is simulated and optimized using a reduced process model accounting for the mass balances and the thermodynamic limits. Favorable operating points of the process are identified using multi-objective optimization.

中文翻译：

从甲醛和甲醇生产聚甲醛二甲基醚的新工艺的概念设计

聚（甲醛）二甲基醚（OME）是对环境有益的替代燃料。这项工作提出了一种新的OME工艺的概念设计，该工艺采用甲醛和甲醇的水溶液作为原料。在此过程中，所需链长为n = 3–5的OME和水从反应混合物中分离（甲醛+水+甲醇+甲基醇+ OME）。通过研究蒸馏边界和化学平衡来确定热力学极限。由此表明，链长的OME为n= 3–5可通过蒸馏从反应器出口分离。水的分离使用吸附法或膜法进行。通过实验确定水在沸石3A上的吸附等温线。考虑到质量平衡和热力学极限，使用简化的过程模型对OME过程进行了模拟和优化。使用多目标优化来确定过程的有利操作点。

更新日期：2017-09-26

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