Method and apparatus for continuously preparing ethyl acetate by single tower

A technology of ethyl acetate and strong acid, which is applied in the field of preparation of ethyl acetate, can solve problems such as dilute acid treatment of tower still liquid, and achieve the effects of improving single-pass conversion rate, improving utilization rate, and reducing energy consumption

Inactive Publication Date: 2005-05-18
GUANGXI UNIV FOR NATITIES
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  • Method and apparatus for continuously preparing ethyl acetate by single tower
  • Method and apparatus for continuously preparing ethyl acetate by single tower

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Experimental program
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Effect test

Embodiment 1

[0041] (1). First add the acid-alcohol mixture with an acid-alcohol ratio of 5:1 (mol ratio) in the tower kettle, add 5% concentrated sulfuric acid by acetic acid quality and 10-50ml butanol water-carrying agent.

[0042] (2). Heat the solution in the tower kettle until it boils. When the steam reaches the top of the tower, turn off the condensed water and keep the total reflux operation. After the temperature at the top of the tower is stable, adjust the reflux ratio, and at the same time feed the mixed material with an acid-alcohol ratio of 1:1 (mol ratio) and concentrated sulfuric acid from the upper part of the tower, and adjust a certain reflux ratio with a reflux ratio device to make the reaction The crude ester product produced is taken out from the top of the tower, and the temperature at the top of the tower is kept constant. At the same time, the gas phase is discharged from the lower part of the tower, and enters the phase separator to separate water through condens...

Embodiment 2

[0051] ((1). Adding the acid-alcohol mixture that the acid-alcohol ratio is 10:1 (mol ratio) in the tower kettle earlier, adding quality is acetic acid 10% vitriol oil and 15-45ml butyl acetate water-carrying agent.

[0052] (2). Heat the solution in the tower kettle until it boils. When the steam reaches the top of the tower, turn off the condensed water and keep the total reflux operation. After the temperature at the top of the tower is stabilized, the acid-alcohol ratio is 1:1 (mol ratio) and the mixed material containing concentrated sulfuric acid is fed from the upper part of the tower, and a certain reflux ratio is adjusted with a reflux ratio device to make the crude ester product produced by the reaction Take it out from the top of the tower, and keep the temperature at the top of the tower constant. At the same time, the gas phase is discharged from the lower part of the tower, and enters the phase separator to separate water through condensation, and the organic pha...

Embodiment 3

[0063] (1). Earlier in the present embodiment, take about 80% acid aqueous solution as raw material, and the following acid-alcohol proportioning ratio is the value converted into pure acetic acid.

[0064] (2). Adding the acid-alcohol mixture that the acid-alcohol ratio is 2: 1 (mol ratio) in the tower kettle, adding the powdery strong acid ion exchange resin catalyst and 10-40ml butyl acetate belt that the quality is acetic acid 12% Aqua.

[0065] (3). Heat the solution in the tower kettle until it boils. When the steam reaches the top of the tower, turn off the condensed water and keep the total reflux operation. After the temperature at the top of the tower is stabilized, the acid-alcohol ratio is 1:1 (mol ratio) and the mixed material containing concentrated sulfuric acid is fed from the upper part of the tower, and a certain reflux ratio is adjusted with a reflux ratio device to make the crude ester product produced by the reaction Take it out from the top of the tower,...

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Abstract

The single tower ethyl acetate preparing process includes boiling the mixed liquid in certain acid/alcohol ratio and with strong acid catalyst and water carrying agent inside tower; opening condensating water for full reflux operation and stable top temperature after the vapor reaches to tower top; regulating acid/alcohol ratio to 1 and feeding strong acid catalyst from the top; regulating certain reflux ratio with the reflux ratio regulator, taking coarse ester product from the top and maintaining the top temperature unchanged; discharging gas material from the bottom, condensating in condensator, separating water in phase separator and refluxing organic phase with rich water carrying agent to the tower. The present invention has ester content in coarse ester product over 94 %, high conversion rate, low power consumption and low production cost.

Description

technical field [0001] The invention relates to the production process of organic chemical basic raw materials, especially the preparation method and equipment of ethyl acetate. Background technique [0002] Ethyl acetate is an important basic raw material in organic chemical industry and has a wide range of uses in industry. From an international point of view, the International Clean Air Regulation stipulates that after 2003, the use of high-level air-polluting solvents in most coatings should be stopped. As an alternative solvent, ethyl acetate has an increasing demand. From a domestic point of view, the rapid development of my country's coatings, medicine, automobiles, electronics and other industries has accelerated the consumption of ethyl acetate. , 9(3): 37-40 believed that ethyl acetate is a product worthy of development in the chemical industry. From the point of view of the production process, at present, the production of ethyl acetate in my country mainly adopt...

Claims

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Application Information

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IPC IPC(8): C07C67/08C07C69/14
Inventor 廖安平谢涛蓝平吴如春李媚蓝丽红邓光辉
Owner GUANGXI UNIV FOR NATITIES
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