Refinement method and device for synthesizing ethyl acetate through esterification

A technology of ethyl acetate ester and purification method, which is applied in the separation/purification of carboxylate, organic chemistry and other directions, can solve the problems of large steam consumption, complicated operation, long process flow, etc., and achieves high safety factor and high operating performance. The effect of reducing consumption and simple process

Active Publication Date: 2016-03-30
JIANGSU NINE HEAVEN HIGH TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the current common processes generally have problems such as large steam consumption, long process flow, large amount of material and liquid circulation, and complicated operation.

Method used

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  • Refinement method and device for synthesizing ethyl acetate through esterification
  • Refinement method and device for synthesizing ethyl acetate through esterification
  • Refinement method and device for synthesizing ethyl acetate through esterification

Examples

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Effect test

Embodiment 1

[0041] The refining method of ethyl acetate esterification synthesis, the device used is as figure 1As shown, the operation process comprises the following steps: acetic acid, ethanol and concentrated sulfuric acid continuously enter the esterification kettle 1 to react, and the top of the esterification kettle 1 is also provided with an esterification tower 2, and the top of the esterification tower 2 obtains ethyl acetate, water, Crude esters composed of ethanol; after being condensed by the top condenser 3, all of them are extracted and sent to the evaporator 4, and the flow rate of the evaporators is respectively controlled to 1500kg / h. The crude esters are heated to 110°C and enter the 12 modules made of molecular sieve membrane, silica membrane and PVA membrane (the area of ​​each membrane module is 20m 2 ) pervaporation membrane separator 5 formed in series for dehydration and separation. The pressure on the feed liquid side is 0.2MPa (gauge pressure), and the pressure...

Embodiment 2

[0047] The refining method of ethyl acetate esterification synthesis, the device used is as figure 1 As shown, the operation process comprises the following steps: acetic acid, ethanol and concentrated sulfuric acid continuously enter the esterification kettle 1 to react, and the top of the esterification kettle 1 is also provided with an esterification tower 2, and the top of the esterification tower 2 obtains ethyl acetate, water, Crude esters composed of ethanol; after being condensed by the top condenser 3, all of them are extracted and sent to the evaporator 4, and the flow rate of the evaporator is controlled at 2500kg / h. molecular sieve membrane module (the area of ​​each membrane module is 20m 2 ) pervaporation membrane separator 5 formed in series for dehydration and separation. The pressure on the feed liquid side is 0.2MPa (gauge pressure), and the pressure on the permeate side is controlled at 1500Pa. The water and a small amount of ethyl acetate in the solution ...

Embodiment 3

[0053] The refining method of ethyl acetate esterification synthesis, the device used is as figure 1 As shown, the operation process comprises the following steps: acetic acid, ethanol and concentrated sulfuric acid continuously enter the esterification kettle 1 to react, and the top of the esterification kettle 1 is also provided with an esterification tower 2, and the top of the esterification tower 2 obtains ethyl acetate, water, Crude esters composed of ethanol; after being condensed by the top condenser 3, all of them are taken out and sent to the evaporator 4, and the flow rate of the evaporators is respectively controlled to 3000kg / h. The crude esters are heated to 110°C and enter the Several molecular sieve membrane modules (the area of ​​each membrane module is 20m 2 ) pervaporation membrane separator 5 formed in series for dehydration and separation. The pressure on the feed liquid side is 0.2MPa (gauge pressure), and the pressure on the permeate side is controlled ...

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Abstract

The invention relates to a refinement method and device for synthesizing ethyl acetate through esterification. The refinement method comprises the following steps: step 1, acetic acid reacts with ethyl alcohol in an esterification reactor, reaction steam enters an esterification tower to be separated, and tower top steam is fed into a pervaporation separator for separation, so as to obtain dehydrated raw ester and penetrating fluid; step 2, part of dehydrated raw ester flows back to the top of the esterification tower, and the other part of dehydrated raw ester is fed into a dealcoholization tower for separation and dealcoholization, so as to obtain ethyl acetate crude products at the tower bottom; step 3, the ethyl acetate crude products are fed into a refining tower again for separation to remove heavy components, so that ethyl acetate finished products can be obtained at the tower top. During the recovery process, the recovery rate is high, the technological process is simple, the safety coefficient is high, the energy utilization ratio is high, the circulating volume of material liquid is small, the operating energy consumption is low, and the addition of ternary components is avoided.

Description

technical field [0001] The invention relates to a refining method and device for ethyl acetate esterification synthesis, in particular to a method for synthesizing ethyl acetate by pervaporation refining acetic acid and ethanol esterification, which belongs to the application field of pervaporation membranes. Background technique [0002] Ethyl acetate is an important organic chemical raw material, which can be used to manufacture acetamide, acetoacetate, methyl heptenone, etc. It is widely used in food flavors and other industries. It is one of the synthetic flavors used in a large amount in food flavors. It is widely used in the deployment of banana, pear, peach, pineapple, grape and other flavor food flavors. It can also be used as an extractant and dehydrating agent. It can also be used in Food packaging color printing, etc. Tannin extract series products are used in desulfurization leather, cigarette materials, oil field drilling, metal flotation, descaling, etc. As...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C67/48C07C69/14
CPCC07C67/48C07C69/14
Inventor 郭海超杨龙余从立纪祖焕
Owner JIANGSU NINE HEAVEN HIGH TECH
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