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A reactive distillation device and method for producing high-purity n-butyl acrylate

A technology of n-butyl acrylate and reactive distillation, which is applied in the preparation of carboxylic acid esters, chemical instruments and methods, and the preparation of organic compounds, etc., to achieve the effects of short process flow, high economic benefits, and low production costs

Active Publication Date: 2019-07-16
CHINA CONSTR IND & ENERGY ENG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the reactive distillation process carried out in a reactive distillation column is not suitable for the production of n-butyl acrylate from acrylic acid and n-butanol

Method used

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  • A reactive distillation device and method for producing high-purity n-butyl acrylate
  • A reactive distillation device and method for producing high-purity n-butyl acrylate
  • A reactive distillation device and method for producing high-purity n-butyl acrylate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1: a kind of reactive distillation device that produces high-purity n-butyl acrylate, comprises reactive distillation column 1, condenser 2, phase separator 3 and reboiler 4, also includes two volumes 10m 3The tubular side reactors are numbered as the first side reactor 5 and the second side reactor 6 from bottom to top; the reactive distillation column is divided into reactive distillation column rectification zones from top to bottom 7. The reactive distillation zone 8 of the reactive distillation tower and the stripping zone 9 of the reactive distillation tower, the reactive distillation zone 8 of the reactive distillation tower is fed through the liquid phase returned to the reactive distillation tower from the first side reactor Feed pipeline 10 and the liquid phase discharge pipeline 11 that is extracted from the reactive distillation column to the first side reactor are connected with the first side reactor 5, and are returned to the reactive distillati...

Embodiment 2

[0038] Embodiment 2: the apparatus structure in the present embodiment is the same as that in the embodiment 1, and its difference is that the reactive distillation tower and 3 volumes in the present embodiment are 10m 3 The tubular side reactors of the reactive distillation tower are connected to each other, the number of trays in the reactive distillation tower is 25, the number of trays in the rectification zone of the reactive distillation tower is 6, and the number of trays in the reactive distillation zone of the reactive distillation tower is 9 pieces. The number of trays in the stripping area of ​​the reactive distillation tower is 10, and the material extracted from the 12th tray of the reactive distillation tower enters the first side reactor, and the material from the outlet of the first side reactor enters the 15th tray Tray (the number of trays is counted from top to bottom); the material from the 9th reactive distillation tray enters the second side reactor, and t...

Embodiment 3

[0040] Embodiment 3: the apparatus structure in the present embodiment is the same as that in the embodiment 1, and its difference is that the reactive distillation column and 3 volumes in the present embodiment are 10m 3 The tubular side reactors of the reactive distillation tower are connected to each other, the number of trays in the reactive distillation column is 22, the number of trays in the rectification zone of the reactive distillation column is 5, and the number of trays in the reactive distillation zone of the reactive distillation column is 7. The number of trays in the stripping zone of the reactive distillation tower is 10, and the material extracted from the 10th tray of the reactive distillation tower enters the first side reactor, and the material from the outlet of the first side reactor enters the 12th tray Tray (the number of trays is counted from top to bottom); the material from the 8th reactive distillation tray enters the second side reactor, and the se...

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PUM

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Abstract

The invention discloses a reaction distillation device for producing high-purity n-butyl acrylate.The reaction distillation device comprises a reaction distillation column, a condenser, a phase splitter and a reboiler and further comprises a plurality of side reactors.The reaction distillation region of the reaction distillation column is coupled to the multiple side reactors through material feeding and discharging pipelines of the reaction distillation column.The n-butyl acrylate prepared by adopting the device has the advantages that the technological process is short and easy to control, the acrylic acid conversion rate and the n-butyl acrylate selectivity are high, the production cost is low, and economic benefits are high.Materials can be continuously extracted from a reaction distillation column reactor by adopting the device, the operation pressure of the reaction distillation column is controlled to be 0.005-0.1 MPa, the esterification reaction temperature is 85-98 DEG C, the reaction pressure is 0.1-1.0 MPa, the mass fraction of n-butyl acrylate in the finally-obtained product can reach 99.5% or above, the n-butyl acrylate selectivity can reach 99.7% or above, and the mass fraction of acrylic acid and the mass fraction of a polymer thereof are lower than 0.1%.

Description

technical field [0001] The invention belongs to the field of organic chemical raw material production, in particular to a reactive distillation device and method for producing high-purity n-butyl acrylate. Background technique [0002] N-butyl acrylate is an important organic chemical raw material, used in the manufacture of synthetic resins, synthetic fibers, synthetic rubber, plastics, coatings, adhesives, emulsifiers, organic synthesis intermediates, etc. At present, as the demand for n-butyl acrylate increases year by year, its production process also needs to be improved urgently. [0003] One of the main technological processes for the production of n-butyl acrylate is the esterification process using acrylic acid and n-butanol. Both acrylic acid and n-butyl acrylate contain unsaturated double bonds, which are easy to self-polymerize, and the polymerization reaction intensifies rapidly as the temperature rises. Therefore, the main factors affecting the yield of n-buty...

Claims

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Application Information

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IPC IPC(8): C07C67/08C07C67/54C07C69/54
CPCC07C67/08C07C67/54C07C69/54Y02P20/10
Inventor 孙玉玉黄益平徐义明
Owner CHINA CONSTR IND & ENERGY ENG GRP CO LTD