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

Method for catalyzing methyl acetate transesterification with polyacid ionic liquid

A methyl acetate, ionic liquid technology, applied in chemical instruments and methods, physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, etc., can solve the problems of mass transfer, side reactions, equipment corrosion and other problems, to achieve the effect of broad industrial application prospect, simple synthesis method and mild reaction conditions

Inactive Publication Date: 2018-01-19
HENAN UNIVERSITY
View PDF2 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The transesterification reaction is usually carried out in the presence of an acid catalyst. The commonly used acid catalysts mainly include sulfuric acid, phosphoric acid, p-toluenesulfonic acid, solid acid, strongly acidic cation exchange resin, etc. However, there are many shortcomings in this method.
For example, the use of inorganic liquid acid catalysts such as sulfuric acid is prone to side reactions, severe equipment corrosion, and a large amount of waste acid water is produced, causing environmental pollution
The cation exchange resin catalyst shows good catalytic activity and is a commercial solid acid catalyst with excellent performance, but it also has some defects, such as poor thermal stability, easy poisoning and deactivation, and mass transfer problems

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
  • Method for catalyzing methyl acetate transesterification with polyacid ionic liquid
  • Method for catalyzing methyl acetate transesterification with polyacid ionic liquid
  • Method for catalyzing methyl acetate transesterification with polyacid ionic liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] In the reactor, add 7.4g (0.1mol) of methyl acetate, 6.9g (0.15mol) of ethanol and 0.286g of bisimidazole butyl sultone phosphomolybdate ionic liquid (accounting for 2wt% of the total mass of raw materials) in sequence , Heating with stirring to a reaction temperature of 60°C, constant temperature reaction for 4h, the conversion rate of methyl acetate is 55%.

Embodiment 2

[0028] In the reactor, add 7.4g (0.1mol) of methyl acetate, 9.015g (0.15mol) of n-propanol and 0.524g of bisimidazole butyl sultone tungstate ionic liquid (accounting for 3wt of the total mass of raw materials) in the reactor. %), heating with stirring to a reaction temperature of 50°C, constant temperature reaction for 7 hours, the conversion rate of methyl acetate is 37%.

Embodiment 3

[0030] In the reactor, add 7.4g (0.1mol) of methyl acetate, 22.24g (0.3mol) of n-butanol and 2.07g of bisimidazole butyl sultone phosphomolybdate ionic liquid (accounting for 7wt of the total mass of the raw materials). %), heating with stirring to a reaction temperature of 70°C, constant temperature reaction for 8 hours, the conversion rate of methyl acetate is 48%.

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 method for catalyzing methyl acetate transesterification with a polyacid ionic liquid. In the method, high-value-added acetate compounds are prepared through transesterification by taking methyl acetate and alcohol as raw materials, and a di-sulfonyl functionalized polyacid ionic liquid as a catalyst. The method disclosed by the invention has the advantages of high catalyst activity, mild reaction conditions, automatic precipitation and separation of the catalyst after reaction, and the like.

Description

Technical field [0001] The invention relates to a method for catalyzing the transesterification of methyl acetate by a polyacid ionic liquid. The method is characterized in that a double sulfonic acid functionalized polyacid ionic liquid is used as a catalyst, and methyl acetate and alcohol are used as raw materials to undergo transesterification. Generates acetate compounds. Background technique [0002] As a chemical raw material, methyl acetate can be used as a quick-drying solvent for nitrocellulose and cellulose acetate. It is also used in the manufacture of artificial leather and spices and as an extractant for oils and fats, but it is comparable to other esters in the same family. Compared with, its demand is not very large. In industrial production, it often appears in large quantities as a by-product, such as 1.5 to 1.7 tons of methyl acetate per ton of polyvinyl alcohol (PVA) produced. The industrial application value of methyl acetate is not high. Most PVA manufactur...

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): C07C69/14C07C67/03B01J31/02
CPCY02P20/584
Inventor 刘勇翟翠萍王建红刘威华李西营
Owner HENAN UNIVERSITY
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