Method for preparing methoxyethyl acrylate

A technology of methoxyethyl acrylate and acrylic acid, applied in the field of organic compound preparation, can solve the problems of increasing product production time, not meeting national standards, unfavorable economic benefits, etc., and achieves improved market competitiveness, easy procurement, and simple washing steps Effect

Inactive Publication Date: 2009-12-23
TIANJIN CHEM REAGENT RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The third step requires a high degree of vacuum. Ordinary vacuum pumps cannot meet the requirements. High vacuum pumps must be used to meet the requirements. However, this will inevitably increase equipment investment, increase product production time, reduce production efficiency, and

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0026] Example 1:

[0027] (1). Esterification reaction:

[0028] Into a 500-liter reactor equipped with a heating device, an electric stirring device, a thermometer, a water circulation condenser and an oil-water separator, 100 kg of acrylic acid, 100 kg of ethylene glycol monomethyl ether, 160 kg of benzene, 10 One kilogram of p-toluenesulfonic acid as a catalyst and 1 kilogram of activated carbon as a decolorizing agent are heated to boiling while stirring, keep boiling and reflux for 8 hours, continuously separate water from the oil-water separator, and stop heating when no more water is produced. , The esterification reaction is terminated.

[0029] (2). Washing

[0030] ①. Add 100 kilograms of 8% sodium chloride solution to the mixture obtained after the reaction in step (1), stir evenly, then stand still for layering, and finally discard the water layer;

[0031] ②. Add 100 kilograms of 0.8% sodium carbonate solution to the mixture after washing with sodium chloride solutio...

Example Embodiment

[0035] Example 2

[0036] (1). Esterification reaction:

[0037] Into a 500-liter reactor equipped with a heating device, an electric stirring device, a thermometer, a water circulation condenser and an oil-water separator, 100 kg of acrylic acid, 100 kg of ethylene glycol monomethyl ether, 160 kg of benzene, 10 Kg of p-toluenesulfonic acid and 1.5 kg of decolorizing agent activated carbon, heated to boiling while stirring, kept boiling and refluxed for 9 hours, continuously separated water from the oil-water separator, and stopped heating until no more water was generated, and esterified The reaction is terminated.

[0038] (2). Washing

[0039] ①. Add 100 kilograms of 10% sodium chloride solution to the mixture obtained after the reaction in step (1), stir evenly, then stand still for layering, and finally discard the water layer;

[0040] ②. Add 100 kg of sodium carbonate solution with a concentration of 1% to the mixture after washing with sodium chloride solution, stir evenly...

Example Embodiment

[0044] Example 3

[0045] (1). Esterification reaction:

[0046] Into a 500-liter reactor equipped with a heating device, an electric stirring device, a thermometer, a water circulation condenser and an oil-water separator, 100 kg of acrylic acid, 100 kg of ethylene glycol monomethyl ether, 160 kg of benzene, 10 Kilogram of p-toluenesulfonic acid and 2 kg of decolorizing agent activated carbon are heated to boiling while stirring, keep boiling and reflux for 10 hours, continuously separate the water from the oil-water separator, and stop heating when no more water is formed. The chemical reaction is terminated.

[0047] (2). Washing

[0048] ①. Add 100 kilograms of a 12% sodium chloride solution to the mixture obtained after the reaction in step (1), stir evenly, then stand still for layering, and finally discard the water layer;

[0049] ②. Add 100 kilograms of 1.2% sodium carbonate solution to the mixture after washing with sodium chloride solution, stir it evenly, then stand st...

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PUM

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Abstract

The invention relates to a method for preparing methoxyethyl acrylate, which comprises the preparation steps of: (1) esterification reaction; (2) washing; and (3) decompression desolventizing, wherein the washing comprises the steps of: 1) adding saline water into a mixture obtained after the esterification reaction, stirring the obtained solution evenly, then keeping stand for layering, and discarding an aqueous layer; 2) adding alkaline water into the mixture washed by the saline water, stirring the obtained solution evenly, then keeping stand for layering, and discarding an aqueous layer; and 3) adding water into the mixture washed by the alkaline water, stirring the obtained solution evenly, then keeping stand for layering, and discarding an aqueous layer. The method greatly reduces production cost and improves the market competitiveness of enterprises by adopting a washing step to substitute the prior decompression refining step and adding a decolorizing agent, namely activated carbon during the esterification reaction; and in addition, the washing step has simple operation, is easy to realize, and can effectively shorten labor hour and improve production efficiency.

Description

technical field [0001] The invention belongs to the field of organic compound preparation, especially the preparation method of methoxyethyl acrylate. Background technique [0002] As an important organic intermediate, methoxyethyl acrylate has been widely used. At present, the production steps of methoxyethyl acrylate are usually: 1. The product is obtained by esterification; 2. The solvent is removed under reduced pressure; 3. The product is refined under reduced pressure. The third step requires a high degree of vacuum. Ordinary vacuum pumps cannot meet the requirements. High vacuum pumps must be used to meet the requirements. However, this will inevitably increase equipment investment, increase product production time, reduce production efficiency, and increase production costs. , is not conducive to the improvement of the economic efficiency of enterprises. In addition, the product produced without the vacuum refining step has a dark color and does not meet the nation...

Claims

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Application Information

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IPC IPC(8): C07C69/54C07C67/08
Inventor 徐博刚
Owner TIANJIN CHEM REAGENT RES INST
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