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Reactive distillation method and reactive distillation device for producing butanol by hydrogenating butyraldehyde

A technology for the production of butanol and a reactive distillation column, which is applied in chemical instruments and methods, preparation of organic compounds, sustainable manufacturing/processing, etc., can solve problems such as uneconomical, serious equipment corrosion, long process flow, etc., and achieve reduction Operation cost and effect of saving equipment investment

Inactive Publication Date: 2015-04-29
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the long process of the fermentation method and the acetaldehyde method, the equipment is severely corroded and extremely uneconomical, and the existing devices have been basically eliminated.
At present, there are no relevant patents and reports on the application of reactive distillation technology in the process of hydrogenation of butyraldehyde to butanol

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] In this example, the pressure of the evaporator is 0.01MPa; the reactive distillation column uses a copper-based catalyst, the temperature of the reaction section is 250°C, the pressure is 0.01MPa, the reflux ratio is 100, and the molar ratio of hydrogen to aldehyde is 30:1; butanol rectification The tower pressure is 0.5MPa, the reflux ratio is 100; The mass purity of finally obtained isobutanol is 99.9%, and the mass purity of n-butanol is 99.9%.

Embodiment 2

[0019] In this example, the pressure of the evaporator is 3MPa; the reactive distillation column uses a nickel-based catalyst, the temperature of the reaction section is 100°C, the pressure is 2MPa, the reflux ratio is 10, and the molar ratio of hydrogen to aldehyde is 10:1; the butanol distillation column The pressure is 0.7MPa(a), and the reflux ratio is 1; the pressure of the isobutanol separation tower is 1MPa, and the reflux ratio is 20. The mass purity of finally obtained isobutanol is 99%, and the mass purity of n-butanol is 99.5%.

Embodiment 3

[0021] In this example, the pressure of the evaporator is 1MPa(a); the reactive distillation column adopts a copper-based catalyst, the temperature of the reaction section is 120°C, the pressure is 0.6MPa, the reflux ratio is 30, and the molar ratio of hydrogen to aldehyde is 20:1; butanol The pressure of the rectification tower is 1 MPa, and the reflux ratio is 30; the pressure of the isobutanol separation tower is 0.5 MPa, and the reflux ratio is 50. The mass purity of finally obtained isobutanol is 99.8%, and the mass purity of n-butanol is 99.9%.

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Abstract

The invention relates to a reactive distillation method and a reactive distillation device for producing butanol by hydrogenating butyraldehyde. The device comprises an evaporator, a reactive distillation tower, a butanol distillation tower, an n-butanol and iso-butanol separation tower, a condenser, a reboiler, a compressor, a pump, relevant feeding pipelines and pipelines used for connecting the devices. The method and the device have the characteristics that the reactive distillation technology and devices are adopted, light components are separated at a tower top during a process of carrying out hydrogenation reaction of butyraldehyde in the reactive distillation tower; n-butanol and iso-butanol can be prepared by subsequent separation; a unit for producing butanol by using butyraldehyde and a unit for purifying, distilling and separating are operated and coupled in one device for simultaneously operating; reaction products are purified after the reaction is completed; the device investment is saved; the subsequent operation fee is also reduced; the quality purity of n-butanol prepared by separating through the subsequent butanol distillation tower and the n-butanol and iso-butanol separation tower can reach 99.5%; the quality purity of iso-butanol can reach 99%.

Description

technical field [0001] The invention relates to the technical field of butanol production, in particular to a reactive distillation method and device for producing butanol by hydrogenating butyraldehyde. Background technique [0002] Butanol is an important basic organic chemical raw material. It is mainly used as a raw material for resins, paints, adhesives and plasticizers. It can also be used as an extractant for oils, spices and medicines and an additive for alkyd resin coatings. It can be used as a raw material for defoaming agent, detergent, dehydrating agent and synthetic perfume for mineral processing. [0003] The production methods of butanol can be divided into fermentation method, acetaldehyde method and oxo synthesis method. Due to the long process of the fermentation method and the acetaldehyde method, the equipment is severely corroded and extremely uneconomical, and the existing devices have been basically eliminated. The main method of butanol production t...

Claims

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Application Information

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IPC IPC(8): C07C31/12C07C29/141C07C29/80
CPCC07C29/141C07C29/80C07C31/12Y02P20/10
Inventor 李洪高鑫丛山贾雪婷李鑫钢徐明仲武金峰
Owner TIANJIN UNIV
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