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Vertical sieve plate and its application method in the separation system of ethyl acetate esterification

A technology of ethyl acetate and vertical sieve plates, applied in chemical instruments and methods, preparation of carboxylic acid esters, preparation of organic compounds, etc., can solve the problems of easy fouling and blockage of sieve holes, high mass transfer efficiency and mass transfer space Problems such as low utilization rate and narrow operating flexibility can achieve the effect of increasing the crude ester content at the top of the tower, reducing energy consumption and stabilizing operation

Active Publication Date: 2005-12-14
SHANGHAI HUAYI ENERGY CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the defects of low mass transfer efficiency and mass transfer space utilization rate of traditional ordinary sieve plate, easy fouling of sieve holes, high resistance to blockage, and narrow operating flexibility.

Method used

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  • Vertical sieve plate and its application method in the separation system of ethyl acetate esterification
  • Vertical sieve plate and its application method in the separation system of ethyl acetate esterification
  • Vertical sieve plate and its application method in the separation system of ethyl acetate esterification

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Experimental program
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Embodiment

[0016] The raw material feed components and proportioning ratio (weight) are: acidity (calculated by acetic acid) 55.0%, alcohol (calculated by ethanol) 40%, moisture 5%. According to the above requirements, select 316L stainless steel with a suitable thickness and a vertical sieve plate with a long hood. In the embodiment, 316L common sieve plate and 304 and 316L metal structured packing are used.

[0017] In the embodiment of the present invention, a stainless steel sheet is used to make the vertical sieve plate, which is not a limitation of the present invention, and the protection of the present invention shall be subject to the claims.

[0018]

Column type

Original random ceramic packing

tower

Original improved structured pottery

Porcelain packed tower

Examples described are equipped with vertical

sieve plate mixed structure tower

Tower top temperature (°C)

72.0±1.0

71.6±1.0

70.6±0.5

Tow...

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Abstract

The present invention is one kind of vertical sieve plate and its application in the separation system of ethyl acetate esterification, and aims at solving the problems of common sieve plate, which has low mass transfer efficiency, low mass transfer space utilization, easy jamming of meshes, exceed resistance, hard control in acidity of top ethyl acetate product and less operation elasticity. The vertical sieve plate is used in the separation system of ethyl acetate esterification, and the separation system includes esterifying tower, top condensator, ester-water separator and reactor. The vertical sieve plate features the calotte in special shape, the airlift hole of venturi form in the column plate, several rows of small holes on the side wall of calotte, and the optimal designed of the column plate and calotte structure based on the push force mathematic mold. The metal column plate is vertical sieve plate or the combination of common sieve plate and vertical sieve plate.

Description

1. Technical field: [0001] The present invention relates to ethyl acetate production technology, in particular discloses a vertical sieve plate and its application method in ethyl acetate esterification reaction separation system, through the application of vertical sieve plate in the esterification rectification tower, the rectification of products can be improved The effect is to reduce the plate resistance and increase the operating flexibility. 2. Background technology: [0002] A relatively mature and widely used production method of ethyl acetate is the direct esterification reaction of acetic acid and ethanol under the action of a sulfuric acid catalyst, and the reaction product is separated through a series of distillation towers to obtain a qualified ethyl acetate product. Due to the existence of strong acid catalyst and acetic acid, the esterification tower in the traditional esterification reaction separation system is almost always in the form of acid-resistant c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C67/00
Inventor 曾义红齐峻沈树荣唐素丽
Owner SHANGHAI HUAYI ENERGY CHEM
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