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Circular reaction water phase organic acid esterifying device and organic acid esterifying method thereof

A cyclic reaction and organic acid ester technology, which is applied in the chemical industry, can solve the problems of low efficiency of organic acid esters and reduce the yield of organic acid esters, and achieve the effects of increased yield, controllable conditions, and high yield

Active Publication Date: 2016-08-24
SOUTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The presence of water will prevent organic acids and alcohols from moving towards organic acid esters, further reducing the yield of organic acid esters.
[0003] Therefore, it is urgent to improve the low efficiency of converting organic acids and alcohols into organic esters, especially the yield of organic esters for direct esterification of organic acid fermentation broth.

Method used

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  • Circular reaction water phase organic acid esterifying device and organic acid esterifying method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] A water-phase organic esterification device for cyclic reactions, its structure is as follows figure 1 shown. like figure 1 As shown, the water-phase organic esterification device of the circulation reaction comprises an esterification reactor 1, an alcohol vapor dehydrator 2 and a rectification tower 3, wherein the top of the esterification reactor 1 is provided with a condensing device 13 and feeds alcohol vapor The pipeline at the bottom of the dehydrator 2 is connected to the alcohol vapor dehydrator 2; the top of the alcohol vapor dehydrator 2 is connected to the esterification reactor 1 by setting a return pipe leading into the bottom of the esterification reactor 1; the bottom of the alcohol vapor dehydrator 2 is connected to the The rectification column 3 is connected. When using this device to esterify organic acids, add a dehydrating agent in the alcohol steam dehydrator, and the dehydrating agent can be 3A molecular sieve, silica gel or a mixture thereof; ...

Embodiment 2

[0032] A method for esterifying organic acids in a water-phase organic esterification device for circulating reactions. The specific steps are as follows: carry out esterification reaction with organic acid solution, alcohol and acid in an esterification reactor to obtain steam containing organic acid ester, water and alcohol. mixture, and then the resulting steam mixture is condensed and passed into an alcohol steam dehydrator adding a dehydrating agent for dehydration, and at the same time, the alcohol in the alcohol steam dehydrator is returned to the esterification reactor, and the reaction is circulated until the chemical reaction reaches equilibrium, and finally Pass the reaction liquid in the alcohol steam dehydrator or / and the esterification reactor into the rectification tower to remove the alcohol to obtain the organic acid ester.

[0033] The esterification of malic acid aqueous solution into malate in the above-mentioned device is an example below:

[0034] Method ...

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Abstract

The invention discloses a circular reaction water phase organic acid esterifying device and an organic acid esterifying method thereof. The device comprises an esterifying reactor, an alcohol steam dewaterer and a rectifying tower. The top of the esterifying reactor is connected into the bottom of the alcohol steam dewater through a pipeline which is provided with a condensing unit. The alcohol steam dewaterer is connected into the bottom of the esterifying reactor through a return pipeline. The bottom of the alcohol stream dewaterer is connected with the rectifying tower through a pipeline. A device containing a dewatering agent is arranged on the bottom of the alcohol steam dewaterer. The circular reaction water phase organic acid esterifying device has the advantages of being simple in structure, high in efficiency, low in energy consumption and the like and can achieve direct water phase esterifying of organic acid. The invention further discloses the organic acid esterifying method of the device. The method is simple, the organic acid esterifying yield is high, and the method is suitable for industrial mass production.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to a water-phase organic esterification device for cyclic reaction, and also relates to a method for esterifying organic acids into organic acid esters by using the device. Background technique [0002] Organic acid esters are compounds formed by organic acids and alcohols under the action of catalysts, and are important products or intermediates in the chemical industry and pharmaceuticals. However, due to the weak acidity of organic acids and low carbonyl activity, the reaction between organic acids and alcohols is usually very slow, and the esterification reaction is a reversible process. When organic carboxylic acids and alcohols react to form esters and water, the esters and water can also react. Alcohols and organic acids are obtained, resulting in a low yield of organic acid esters. For example: when organic acids and alcohols of the same amount participate in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C67/08C07C69/675C07C67/48
CPCY02P20/582C07C67/08C07C67/48C07C69/675
Inventor 邹祥李小东
Owner SOUTHWEST UNIV