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One-pot n-hexyl acrylate synthetic process

A technology for the synthesis of n-hexyl acrylate, which is applied in the preparation of carboxylic acid esters, chemical instruments and methods, and the preparation of organic compounds. It can solve the problems of high production costs, low product purity, and many by-products, and reduce the number of reaction steps. , high product purity, and the effect of reducing industrial production costs

Inactive Publication Date: 2014-12-24
杨巧梅 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] N-hexyl acrylate is a new type of organic conductive material, and it is also an important raw material for chemical production. The existing n-hexyl acrylate is usually synthesized by transesterification or direct esterification, but its existing synthesis process generally has many steps. , low yield, many by-products, low product purity, high production cost, etc.

Method used

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  • One-pot n-hexyl acrylate synthetic process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] First, add 72g of acrylic acid, 250g of toluene, and 0.03g of hydroquinone into the reaction flask, stir and heat to 80°C, start to add 105g of n-hexanol and 0.1g of concentrated sulfuric acid dropwise, and keep warm and reflux to separate water after the dropwise addition. GC traced the acrylic acid to be less than 0.1% as the end point, added sodium acetate, and collected the fraction with a boiling point of 77-80°C / 14mmHg by vacuum distillation to obtain 135g of n-hexyl acrylate, GC: 99.4%, yield 86.5%.

Embodiment 2

[0028] The consumption of dehydrating agent toluene is increased by 1 times, and other conditions are reacted under the identical situation with embodiment 1, investigate reaction result, the results are shown in Table 1.

Embodiment 3

[0030] The consumption of dehydrating agent toluene increases 3 times, under the completely identical situation of other conditions and embodiment 1, react, examine reaction result, the results are shown in Table 1.

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Abstract

The invention provides a one-pot n-hexyl acrylate synthetic process. According to the process, acrylic acid and n-hexyl alcohol are directly esterified under the effect of a catalyst and a polymerization inhibitor to prepare n-hexyl acrylate, wherein during esterification, water generated by esterification is separated by adopting an azeotropic dehydrating method, so that the reaction is proceeded toward positive reaction. The molar ratio of acrylic acid to n-hexyl alcohol is (0.5-3) to 1. As the process can be proceeded in one pot, the reaction steps are greatly reduced, the post-treatment steps are canceled, and meanwhile, the problems that long straight chain alcohol is hard to esterify, many byproducts are generated, the yield is low, the product purity is low and the like are solved. High-purity products are obtained at one time and the industrial production cost is lowered.

Description

technical field [0001] The invention relates to the field of chemical synthesis, in particular to a synthesis process of n-hexyl acrylate. Background technique [0002] N-hexyl acrylate is a new type of organic conductive material, and it is also an important raw material for chemical production. The existing n-hexyl acrylate is usually synthesized by transesterification or direct esterification, but its existing synthesis process generally has many steps. , low yield, many by-products, low product purity, and high production costs. Contents of the invention [0003] The purpose of the present invention is to provide a kind of step few, high yield, the high n-hexyl acrylate synthesis technique of product purity. [0004] In order to achieve the above object, the technical scheme provided by the present invention is a one-pot process n-hexyl acrylate synthesis process, the process is to obtain n-hexyl acrylate by direct esterification of acrylic acid and n-hexanol under th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C69/54C07C67/08
CPCC07C67/08C07C67/54
Inventor 杨巧梅张雯君
Owner 杨巧梅