Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A refining method and device for esterification synthesis of ethyl acetate

A technology of ethyl acetate ester and refining method, which is applied in the field of pervaporation refining acetic acid and ethanol esterification method to synthesize ethyl acetate, which can solve the problems of large steam consumption, complicated operation, long process flow, etc., and achieve high safety factor , reduced operating energy consumption, simple process

Active Publication Date: 2017-08-25
JIANGSU NINE HEAVEN HIGH TECH
View PDF1 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

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
  • A refining method and device for esterification synthesis of ethyl acetate
  • A refining method and device for esterification synthesis of ethyl acetate
  • A refining method and device for esterification synthesis of ethyl acetate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] 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 ester composed of ethanol; after being condensed by the tower top condenser 3, all of it is extracted and sent to the evaporator 4, and the flow rate of the evaporator is controlled to 1500 kg / h respectively, and the crude ester is heated to 110°C and enters the evaporator in the form of steam. It consists of 12 modules made of molecular sieve membrane, silica membrane and PVA membrane (the area of ​​each membrane module is 20 m 2) pervaporation membrane separator 5 formed in series for dehydration and separation. The pressure on the feed li...

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 2500 kg / h. The crude esters are heated to 110°C and enter the 12 molecular sieve membrane modules (the area of ​​each membrane module is 20 m 2 ) pervaporation membrane separator 5 formed in series for dehydration and separation. The pressure on the feed liquid side is 0.2 MPa (gauge pressure), and the pressure on the permeate side is controlled at 1500 Pa. The...

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 ester composed of ethanol; after being condensed by the top condenser 3, all of it is extracted and sent to the evaporator 4, and the flow rate of the evaporator is respectively controlled to 3000 kg / h, and the crude ester is heated to 110°C and enters the evaporator in the form of steam. It consists of several molecular sieve membrane modules (the area of ​​each membrane module is 20 m 2 ) pervaporation membrane separator 5 formed in series for dehydration and separation. The feed liquid side pressure is 0.2 MPa (gauge pressure), and the pe...

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 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 a...

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 Patents(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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com