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Production method of ethyl acetate

A production method and technology for ethyl acetate, applied in the field of preparation and separation of ethyl acetate, can solve the problems of low conversion rate of ethanol, complicated separation process, equipment corrosion, etc., improve the conversion rate, solve the problems of complex technological process and easy operation. Effect

Active Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional acetic acid esterification process has been phased out abroad, but most of the large-scale production processes in China are acetic acid esterification, that is, acetic acid and ethanol are dehydrated and esterified under the condition of sulfuric acid as a catalyst, but the conversion rate of ethanol in this method is low and separation The process is complicated and water separation is difficult; the use of sulfuric acid as a catalyst leads to the generation of waste acid, which not only seriously corrodes the equipment, but also pollutes the environment

Method used

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  • Production method of ethyl acetate
  • Production method of ethyl acetate
  • Production method of ethyl acetate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1~4

[0027] 98% chemically pure acetic acid and absolute ethanol are metered and mixed at a molar ratio of 1:1 through a plunger pump, and then injected into a fixed-bed pre-reactor equipped with a resin catalyst, and the pre-reacted mixture enters a catalytic distillation tower, unreacted ethanol fully reacts with supplemented acetic acid. Wherein, the molar ratio of supplemented acetic acid to unreacted ethanol is 1.5:1. The loading amount of the catalyst in the fixed bed prereactor is 40ml, and the loading amount of the catalyst in the catalytic distillation tower is 100ml.

[0028] The test results under different temperature and space velocity conditions are shown in Table 1.

[0029] Table 1 Reaction results under different temperature and space velocity conditions

[0030]

Embodiment 5~6

[0032] Acetic acid with a mass fraction of 90% and ethanol with a mass fraction of 90% are metered and mixed at a molar ratio of 1:1 through a plunger pump, and then injected into a fixed-bed pre-reactor equipped with a resin catalyst, and the pre-reacted mixture enters a catalytic distillation tower , the unreacted ethanol fully reacts with the supplemented acetic acid. Wherein, the molar ratio of supplemented acetic acid to unreacted ethanol is 2:1. The loading amount of the catalyst in the fixed bed prereactor is 40ml, and the loading amount of the catalyst in the catalytic distillation tower is 100ml.

[0033] The test results under different temperature and space velocity conditions are shown in Table 2.

[0034] Table 2 Reaction results under different temperature and space velocity conditions

[0035]

Embodiment 7~8

[0037] Acetic acid with a mass fraction of 85% and ethanol with a mass fraction of 85% are metered and mixed at a molar ratio of 1:1 through a plunger pump, and then injected into a fixed-bed pre-reactor equipped with a resin catalyst, and the pre-reacted mixture enters a catalytic distillation tower , the unreacted ethanol fully reacts with the supplemented acetic acid. Wherein, the molar ratio of supplemented acetic acid to unreacted ethanol is 2:1. The loading amount of the catalyst in the fixed bed prereactor is 40ml, and the loading amount of the catalyst in the catalytic distillation tower is 100ml.

[0038] The test results under different temperature and space velocity conditions are shown in Table 3.

[0039] Table 3 Reaction results under different temperature and space velocity conditions

[0040]

[0041] It can be seen that the ethanol in Example 1, Example 3, Example 5 and Example 7 has been completely converted, and the product purity of ethyl acetate reach...

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Abstract

The invention discloses a production method of ethyl acetate, belongs to the field of organic chemical industry, and particularly relates to a process for preparing and separating ethyl acetate in the existence of a catalyst. The production method is characterized by adopting the production process as follows: firstly, mixing raw materials, namely acetic acid and ethanol, according to a certain ratio by using a static mixer (5), allowing the mixture to enter from the upper part of a fixed-bed reactor (3), reacting in the fixed-bed reactor (3), enabling a reaction product to flow out from the lower part of the fixed-bed reactor (3) and then enter from the upper part of a reaction section of a catalytic distillation tower (4), reacting in the catalytic distillation tower (4), reflowing a part of a tower-top product, enabling the rest part of the tower-top product to flow out as a product, and enabling the unreacted acetic acid returns from the catalytic distillation tower (4) as well as the supplemented acetic acid to enter the catalytic distillation tower (4) from the upper part of the reaction section. According to the production method provided by the invention, process conditions are mild, the operation is easy, and the conversion rate is improved to a certain extent while the material consumption and the energy consumption are effectively reduced and the treating capability of a device is improved.

Description

technical field [0001] A production method of ethyl acetate belongs to the field of organic chemical industry, and specifically relates to a process for preparing and separating ethyl acetate in the presence of a catalyst. Background technique [0002] The main uses of ethyl acetate are: as an industrial solvent, used in coatings, adhesives, ethyl cellulose, artificial leather, linoleum colorants, artificial fibers and other products; as a binder, used in the production of printing ink and artificial pearls ;As an extractant, it is used in the production of medicines, organic acids and other products; as a raw material for spices, it is used as the main raw material for fruit flavors such as pineapples, bananas, strawberries, whiskey, cream, etc. It is a large amount of synthetic flavors in food flavors one. Ethyl acetate can also be used as a cleaning agent in the textile industry and an extraction agent for natural flavors, and is an important raw material for the pharmac...

Claims

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Application Information

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IPC IPC(8): C07C67/08C07C69/14
CPCC07C67/08C07C69/14Y02P20/10
Inventor 侯磊孙强朱相春李刚刘淑芝何宗华
Owner CHINA PETROLEUM & CHEM CORP
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