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Method for preparing 1,3,5-trioxane

一种三氧杂环己烷、装备有的技术，应用在分离方法、化学仪器和方法、医药配方等方向，能够解决工艺复杂、消耗过多能量等问题

Active Publication Date: 2013-09-25
KOLON PLASTICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this attempt is also problematic because a large amount of energy must be used to move the water out of the distillation system, thus complicating the process and consuming too much energy

Method used

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  • Method for preparing 1,3,5-trioxane
  • Method for preparing 1,3,5-trioxane

Examples

Experimental program
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Embodiment 1

[0043] use figure 1 The reactive distillation column shown produces 1,3,5-trioxane. The reactive distillation tower includes a distillation tower 20, a reactor 10 (5 L in volume, equipped with a heating unit) and a decanter (1.5 L in volume), and the distillation tower 20 is equipped with a distillation unit 21 (30 mm in diameter, 15 stages, bubble-cap tray ), extraction unit 22 (diameter 50mm, 20 stages, bubble cap tray) and side draw unit 23 (1 stage, chimney tray) arranged between distillation unit 21 and extraction unit 22.

[0044] An aqueous formaldehyde solution having a concentration of 65.0 wt% was supplied to the reactor 10 at a flow rate of 400 g / hr, and the concentration of sulfuric acid in the reaction solution was set at 2.0 wt%. The 1,3,5-trioxane-containing vapor generated by steam heating at 1400 g / hr was supplied to the distillation unit 21 of the distillation column 20 .

[0045] The 1,3,5-trioxane-containing vapor is fed to the extraction unit 22, while b...

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Abstract

The present invention relates to a method for preparing 1,3,5-trioxane using a distillation tower including a reactor, a distillation section, and an extraction section. Particularly, the present invention relates to a method for preparing 1,3,5-trioxane, which involves utilizing the water phase separated from the stream discharged through the extraction section of the distillation tower in the process for extracting 1,3,5-trioxane.

Description

technical field [0001] The present invention relates to a process for preparing 1,3,5-trioxane using a reactive distillation column comprising a reactor and a distillation column equipped with a distillation unit and an extraction unit. Background technique [0002] Typically, 1,3,5-trioxane is prepared by cyclization of formaldehyde in the presence of an acid catalyst or a solid acid catalyst. The 1,3,5-trioxane-containing vapor obtained by the cyclization reaction is supplied from the reactor to the distillation column. The 1,3,5-trioxane-containing vapor boiling in the distillation column is concentrated and discharged, and then the concentrated 1,3,5-trioxane-containing vapor is extracted with a water-insoluble organic solvent Vapors of cyclohexane. Alternatively, the 1,3,5-trioxane-containing vapor boiling in the distillation column can also be directly extracted with a water-insoluble organic solvent. In both cases, the 1,3,5-trioxane is extracted through a distilla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D323/06B01D3/40
CPCB01D3/009C07D323/06Y02P20/10A61K9/0014
Inventor 赵仁基崔镇尚姜炅旻
Owner KOLON PLASTICS INC
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