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Abstract <p>Separation of crude methylal by extractive distillation with dimethylformamide in schemes of different structures was considered. Based on two schemes consisting of two-outlet columns, four schemes including columns with a side section and five schemes including columns with a side draw were synthesized using the graph method. The optimal parameters of all schemes were determined using the criterion of minimum total energy consumption in the column reboilers. The scheme consisting of an extractive distillation column with a side liquid draw below the extractive section, a methanol recovery column, and a separating agent regeneration column exhibited the minimum energy consumption of 311.5 kW.</p>

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Energy-Saving Schemes for Extractive Distillation of Crude Methylal

  • 期刊论文

  • 发表日期：

    2025年10月1日

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  • D. A. Ramotchnikov,
  • E. A. Anokhina,
  • M. A. Pukhaev,
  • A. V. Timoshenko

摘要

Abstract

Separation of crude methylal by extractive distillation with dimethylformamide in schemes of different structures was considered. Based on two schemes consisting of two-outlet columns, four schemes including columns with a side section and five schemes including columns with a side draw were synthesized using the graph method. The optimal parameters of all schemes were determined using the criterion of minimum total energy consumption in the column reboilers. The scheme consisting of an extractive distillation column with a side liquid draw below the extractive section, a methanol recovery column, and a separating agent regeneration column exhibited the minimum energy consumption of 311.5 kW.