Device for preparing isopropyl acetate in heat pump dividing-wall reactive distillation column

A technology of isopropyl acetate and reactive distillation column, which is applied in the field of rectification, can solve the problems of high energy consumption, and achieve the effect of reducing energy consumption and saving equipment investment

Inactive Publication Date: 2017-05-31
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the reactive distillation process of synthesizing isopropyl acetate by transesterification can obtain esters with higher application value, its high energy consumption has become one of the problems that this method should face widely in industry.

Method used

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  • Device for preparing isopropyl acetate in heat pump dividing-wall reactive distillation column

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Experimental program
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Embodiment 1

[0025] Attached figure 1In the process flow shown, the heat pump dividing wall reactive distillation column 1 used is a packed tower with a diameter of 800mm and 45 meters. The top separation area 2 is equipped with 5 meters of structured packing, and the number of theoretical plates is 10; the reaction separation area 3 is equipped with The structured packing is 35 meters, and the number of theoretical plates is 74, including 9 plates in the rectification section and 43 plates in the reaction section. The reaction section is filled with solid catalyst, the catalyst used is Amberlyst-15 strong acid cation exchange resin, and 12 plates in the stripping section plate. Methanol recovery area 4 is equipped with 5 meters of built-in structured packing, the operating pressure of heat pump partition wall reactive distillation column 1 is 1 atm, the top temperature of tower top separation area 2 is 54°C, the bottom temperature of reaction separation area 3 is 91°C, methanol recovery a...

Embodiment 2

[0028] Attached figure 1 In the process flow shown, the heat pump dividing wall reactive distillation column 1 used is a packed tower with a diameter of 800 mm and a height of 50 meters. There are 10 trays in the top separation area 2; the number of trays in the reaction separation area 3 is 76 Blocks, including 10 plates in the rectification section, 44 plates in the reaction section, filled with a solid catalyst in the reaction section, the catalyst used is Amberlyst-15 strongly acidic cation exchange resin, and 12 plates in the stripping section. There are 6 trays in the methanol recovery area 4, the operating pressure of the heat pump dividing wall reaction distillation column 1 is 2 atm, the top temperature of the tower top separation area 2 is 73 °C, the bottom temperature of the reaction separation area 3 is 113 °C, and the bottom of the methanol recovery area 4 The temperature is 83°C.

[0029] The raw material isopropyl alcohol is fed from the upper part of the react...

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Abstract

The invention discloses a device for preparing isopropyl acetate in a heat pump dividing-wall reactive distillation column, and belongs to the technical field of distillation. The device is the heat pump dividing-wall reactive distillation column for synthesizing isopropyl acetate by taking methyl acetate and isopropanol as raw materials through a transesterification method. According to the process, production of the high-density isopropyl acetate is achieved in the heat pump dividing-wall reactive distillation column, by means of energy coupling of gas-liquid streams in the tower, latent heat of gas on the tower top is fully utilized to supply heat to two bottom reboilers of the dividing-wall reactive distillation tower simultaneously after being subjected to pressurization and temperature rising of a compressor, an external heat source is not needed to supply heat energy, and therefore energy consumption is greatly reduced. Meanwhile, multiple traditional columns for reactive distillation and subsequent separation and purification processes are integrated into one dividing-wall reactive distillation column, and therefore equipment investment is reduced.

Description

technical field [0001] The invention belongs to the technical field of rectification, and relates to a production method of isopropyl ethyl ester, in particular to a device for preparing isopropyl acetate in a heat pump partition wall reactive distillation tower. Background technique [0002] Isopropyl acetate is an important carboxylic acid ester product, which is widely used. It is a raw material for synthetic resins and coatings, and can also be used as a component of certain perfumes, dehydrating agents, solvents for coatings, solvents for printing inks, and can be used as an extractant in some pharmaceutical synthesis processes. Isopropyl acetate is known as a "universal solvent" and can be miscible with organic solvents such as alcohols, ketones, and ethers. [0003] There are mainly three kinds of production techniques for synthesizing isopropyl acetate at present, and a kind of method is exactly that acetic acid and isopropanol are raw materials, under the effect of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C67/03C07C67/48C07C67/54C07C69/14B01D3/14B01D3/00B01D3/42B01D3/32
CPCB01D3/007B01D3/009B01D3/141B01D3/322B01D3/4216C07C67/03C07C67/48C07C67/54C07C69/14Y02P20/10
Inventor 叶青冯申尧夏慧吴卫忠
Owner CHANGZHOU UNIV
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