Energy-saving and yield-improving production method of ethyl acetate

A production method, the technology of ethyl acetate, which is applied in the field of energy-saving and production-increasing ethyl acetate, can solve the problems that cannot be improved, and the product energy consumption cannot be further effectively reduced, so as to reduce the operating load, reduce the return flow, and reduce equipment corrosion Effect

Active Publication Date: 2012-09-19
JINJIANG TAIXING CHEM IND CO LTD
View PDF2 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in this traditional ethyl acetate production method, the energy consumption of the product cannot be further effectively reduced, and the production capacity of the monoesterification tower is also limited by the operating load of the esterification tower, which cannot be increased.

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
  • Energy-saving and yield-improving production method of ethyl acetate
  • Energy-saving and yield-improving production method of ethyl acetate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] like figure 1 As shown, the modified device in this workshop adopts continuous feeding, and the raw materials acetic acid and alcohol are added at a molar ratio of 1:1, and the catalyst concentrated sulfuric acid is directly added to the reaction kettle 1 in a certain amount. The esterification reaction is carried out inside, and the product after the reaction undergoes azeotropic distillation, and the azeotrope enters the esterification tower 2 in binary and ternary forms for separation, and the overhead distillate is condensed by the esterification condenser 3, and the ester-water phase device 4 After phase separation, the crude product can be obtained, a part of which is returned to the esterification tower 2 for reflux, and the other part is subjected to subsequent enrichment and rectification to obtain the finished product ethyl acetate.

[0017] The bottom material in the reaction kettle 2 is extracted according to twice the total amount of the feed, and is transp...

Embodiment 2

[0021] The process of each section of the esterification reaction is the same as implementation 1, such as figure 1 As shown, the bottom material in the reactor 2 is withdrawn according to twice the feed amount, and is transported to the flash tank 5 by a pump for a flash evaporation. The flash temperature is controlled at 110-130°C, and the flash pressure is controlled at 0.15-0.25Mpa. After flashing, most of the esters and alcohols in the bottom material return to the bottom of the esterification tower 2, and the remaining bottom material ester phase is a large amount of acid and part of water, which is discharged from the bottom of the flash tank through a pump. In the treated bottom material, the component water is about 6.5%, and the component acetic acid is about 92.2%.

[0022] The treated bottom material is pumped to the heat exchanger for heating, and then directly enters the dehydration tower 6 for dehydration treatment. The dehydrating agent is isobutyl acetate, w...

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 an energy-saving and yield-improving production method of ethyl acetate. The production method comprises the following steps of: heating and gasifying raw material acetic acid and ethanol and then feeding into a reaction kettle to react; recovering a bottom material in the reaction kettle according to a certain proportion with the total amount of fed materials to an evaporator to perform flash evaporation, wherein most of ester and alcohol in the bottom material which is subjected to flash evaporation are returned to the bottom of an esterification tower, and the ester phase of the rest bottom material is a large amount of acid and a part of water and is discharged through a pump from the bottom of the evaporator; conveying the treated bottom material to a heat exchanger through the pump for heating and then directly feeding into a dehydration tower to perform dehydration treatment; performing azeotropic distillation and recovering azeotrope formed by water and a dehydrant from the top of the esterification tower; condensing to split phase; discharging the water phase to a recovery tower for treatment; reflowing the oil phase to a dehydration tower; and newly returning acid which is discharged from the bottom of the dehydration tower to the reaction kettle to participate in esterification reaction. After the process is implemented, the water in the kettle is effectively reduced to further reduce the corrosion condition of the equipment, the energy of an esterification section is saved by 5-10 percent, the capacity can be increased by 10-20 percent, and the economic benefit is obvious.

Description

technical field [0001] The invention provides a production method for energy-saving and production-increasing ethyl acetate. Specifically, by transforming the traditional esterification process, an evaporator and a dehydration tower are added, and the reaction kettle liquid is extracted and circulated to effectively remove the moisture in the reaction kettle. , while reducing the reflux and evaporation of the esterification tower to achieve the purpose of energy saving and production increase. Background technique [0002] Ethyl acetate is also called ethyl acetate. Pure ethyl acetate is a colorless, transparent liquid with a pungent odor. It is a fine chemical product with a wide range of uses. It has excellent solubility, quick drying, and a wide range of uses. It is a very important organic chemical raw material and extremely Good industrial solvent. [0003] The traditional ethyl acetate production process is the esterification method: acetic acid and alcohol are used ...

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
CPCY02P20/10
Inventor 赵楚榜于冬娥朱宏文叶四华李艺强
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