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Method for producing isopropyl acetate through heat pump partition-wall reactive distillation tower

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

Inactive Publication Date: 2017-05-24
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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  • Method for producing isopropyl acetate through heat pump partition-wall reactive distillation tower
  • Method for producing isopropyl acetate through heat pump partition-wall reactive distillation tower

Examples

Experimental program
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Effect test

Embodiment 1

[0024] 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 2300 mm 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 zone III is filled with 5 meters of structured packing, the operating pressure of the heat pump dividing wall reactive distillation column RDWC is 1 atm, the top temperature of the top separation zone 2 is 54°C, the bottom temperature of the reaction separation zone 3 is 91°C, and the methanol r...

Embodiment 2

[0027] with attached figure 1 In the process flow shown, the heat pump dividing wall reactive distillation column 1 used is a tray column with a diameter of 2100 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.

[0028] The raw material isopropanol is fed from the upper part of the reacti...

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Abstract

The invention discloses a method for producing isopropyl acetate through a heat pump partition-wall reactive distillation tower and belongs to the technical field of rectification. Isopropanol and methyl acetate are respectively fed into a reaction and separation zone of the heat pump partition-wall reactive distillation tower to be in contact with a catalyst for reaction and separation zone, a vapor-phase mixture of methyl alcohol and methyl acetate flows out of a tower top separation zone and is divided into two ways, one way of mixture is compressed by a compressor and then provides reboiling heat for an isopropyl acetate reboiler at the bottom of the reaction and separation zone, then the way of mixture passes through a throttling valve and then is mixed with the other way of mixture, one part flows back to the tower after condensation, the other part is mixed with the raw material methyl acetate, and the mixture returns to the reaction and separation zone again. The target product high-purity isopropyl acetate is extracted from the lower portion of the reaction and separation zone, and the methyl alcohol is extracted from the lower portion of a methyl alcohol recovery zone. Multiple towers for traditional reaction, rectification and follow-up separation and purification processes are integrated to one partition-wall reactive distillation tower, and device investment is saved.

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 heat pump dividing wall reactive distillation tower for preparing isopropyl acetate and a production method thereof. Background technique [0002] Isopropyl acetate is an important carboxylate product. It is a raw material for synthetic resins and coatings. It can also be used as a component of certain perfumes, dehydrating agents, solvents for coatings, and solvents for printing inks. It can also 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 strong...

Claims

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Application Information

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IPC IPC(8): C07C67/03C07C67/54C07C69/14B01D3/14B01D3/00B01J8/02B01J19/32
CPCB01D3/007B01D3/009B01D3/141B01J8/02B01J19/32C07C67/03C07C67/54C07C69/14Y02P20/10
Inventor 叶青冯申尧夏慧吴卫忠
Owner CHANGZHOU UNIV
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