Coupling production process for preparing methyl acetate and butyl acetate

A technology of methyl acetate and butyl acetate, which is applied in the field of coupled production process for the preparation of methyl acetate and butyl acetate, which can solve the problems of azeotropic carry-over, high energy consumption and high material consumption, and achieve reduced heating and improved production efficiency , the effect of reducing energy consumption

Active Publication Date: 2012-10-03
JINJIANG TAIXING CHEM IND CO LTD
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] (1) Since the water generated in the methyl acetate esterification reaction cannot be taken away azeotropically with methyl acetate, there will be a large amount of water remaining in the system, and a large amount of methyl ester must be replenished through the top reflux to carry water, and energy consumption high material consumption
[0017] (2) In the esterification reaction of butyl acetate, since the butyl acetate produced cannot be taken away azeotropically with water, a large amount of butyl acetate will remain in the system, and a large amount of water must be replenished through the top reflux to carry out the esterification. High consumption and material consumption

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Coupling production process for preparing methyl acetate and butyl acetate
  • Coupling production process for preparing methyl acetate and butyl acetate
  • Coupling production process for preparing methyl acetate and butyl acetate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] like figure 1 As shown, the raw material methanol and acetic acid enter the methyl acetate reboiler 1 at a molar ratio of 1:1.6, and the feed rate is 1800L / h. After mixing and preheating, they enter the methyl acetate esterification reactor 2 for esterification reaction. The product enters the methyl acetate esterification tower 3 in the form of an azeotrope, and then enters the methyl acetate overhead condenser 4 and the methyl acetate phase separator 5 for processing and then enters the rectifying tower. Methyl acetate is esterified at 95°C in the bottom of the tower, 68°C in the tower, and 56.3°C at the top of the tower, and the acid in the still is controlled at 65%~66%. Simultaneously extract a part of the still liquid and enter the flash tower 6 for processing, the flow of extracting the still liquid is 645L / h, and the low boiler methyl acetate and water are steamed from the top of the flash tower, which is connected to the plug behind the methyl acetate reboiler ...

Embodiment 2

[0033] like figure 1As shown, the raw material methanol and acetic acid enter the methyl acetate reboiler 1 with a molar ratio of 1:1.7, and the feed rate is 2000L / h. After mixing and preheating, they enter the methyl acetate esterification reactor 2, and then further heat up the reaction. The reaction product enters the methyl acetate esterification tower 3 in the form of an azeotrope, and then enters the methyl acetate overhead condenser 4 and the methyl acetate phase separator 5 for processing and then enters the rectifying tower. Methyl acetate is esterified at 98°C in the bottom of the tower, 70°C in the tower, and 56.5°C at the top of the tower, and the acid in the still is controlled at 70%~71%. Simultaneously extract a part of the still liquid and enter the flash tower 6 for processing. The flow of the extracted still liquid is 750L / h. The temperature of the tube and the bottom of the tower is controlled at 106°C~108°C, and the temperature at the top of the tower is 7...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a coupling production process for preparing methyl acetate and butyl acetate, which comprises a methyl acetate reaction section, a flash zone and a butyl acetate esterification reaction distillation working section, wherein in the methyl acetate reaction section, acetic acid and methanol are introduced into a methyl esterification kettle for an esterification reaction, and after the reaction, a part of esterification kettle liquid is extracted to enter the flash zone for separation; distilled materials from the top of a flash tower are methyl acetate and a small amount of water, and are introduced into an inserting tube at the back of a methyl reboiler, and an extracted material at the bottom of the flash tower is a mixed material of acetic acid containing or non-containing a small amount of methyl acetate; and the mixed material and the raw material butanol are heated and introduced into a butyl acetate esterification kettle for a butyl acetate esterification reaction. Thereby the coupling production of methyl acetate and butyl acetate is realized, the methyl esterification reaction is enhanced, and the energy consumption of products is reduced.

Description

technical field [0001] The present invention relates to the coupled production process of methyl acetate and butyl acetate in the field of chemical industry, specifically, its technical process comprises methyl acetate esterification reaction rectification section, flash section and butyl acetate esterification reaction rectification section. In the present invention, the acetic acid rich in water after reactive distillation in the methyl acetate esterification kettle is used for the reactive distillation of butyl acetate, so as to realize the coupled production of methyl acetate and butyl acetate, and achieve the purpose of strengthening the esterification reaction of methyl acetate, The purpose of reducing product energy consumption. Background technique [0002] Methyl acetate is a class of excellent solvents, miscible with alcohols, ethers, hydrocarbons, etc. It is an excellent solvent for cellulose esters, urea resins, etc. It is used as a quick-drying solvent for nitr...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C07C69/14C07C67/08
Inventor 赵楚榜朱宏文叶四华汪尚飞张浩宁
Owner JINJIANG TAIXING CHEM IND CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap