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

Preparation method of guaiacol

A technology of guaiacol and catechol, applied in ether preparation, chemical instruments and methods, dehydration of hydroxyl-containing compounds to prepare ether, etc., can solve the problems of reducing the service life of the catalyst, deactivating the catalyst, etc. effect of carbon, selectivity improvement, and service life improvement

Active Publication Date: 2021-06-11
WANHUA CHEM GRP
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And catechol is easy to coke and generate carbon on the acidic site of the catalyst, which deactivates the catalyst and reduces the service life of the catalyst

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
  • Preparation method of guaiacol
  • Preparation method of guaiacol
  • Preparation method of guaiacol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] 72g of aluminum phosphate molecular sieve and 18g of cerium phosphate are mixed, extruded by a tablet machine and crushed to obtain solid particles of 20 mesh to 40 mesh. After mixing 8g of dimethyl dithiophosphate and 2g of cinchonidine, dissolve it in 90g of ethanol, and prepare an ethanol solution with an ethanol content of 90wt%, and add the prepared solid particles of 20 mesh to 40 mesh into the dissolved In the ethanol solution of dimethyl phosphorodithioate and cinchonidine, stir at 20°C for 12h, dry at 50°C for 8h, and bake at 200°C for 4h after the ethanol is completely evaporated to obtain the loaded stabilizer and modification Agent Catalyst-1.

Embodiment 2

[0060] 20g of alumina, 60g of silicoaluminophosphate molecular sieve and 5g of lanthanum phosphate are mixed, extruded with a tablet machine and crushed to obtain solid particles of 20-40 mesh. After mixing 5g of diethyl methyl phosphorothioate, 5g of diphenyl dithiophosphoric acid and 5g of cinchonine, they were dissolved in 135g of ethanol to prepare an ethanol solution with an ethanol content of 90wt%. The prepared 20 mesh to 40 Add the target solid particles to the ethanol solution dissolved in diethyl methyl phosphorothioate, diphenyl dithiophosphoric acid and cinchonine, stir at 60°C for 2 hours, dry at 80°C for 4 hours, and evaporate the ethanol completely Calcined at 180°C for 6 hours to obtain Catalyst-2 loaded with stabilizers and modifiers.

Embodiment 3

[0062] 70g of zirconium dioxide and 20g of neodymium phosphate are mixed, extruded by an extruder and crushed to obtain solid particles of 20 mesh to 40 mesh. After mixing 5g diethyl phosphorodithioate and 5g cinchonine, dissolve it in 115g ethanol, and prepare an ethanol solution with an ethanol content of 92wt%, and add the prepared solid particles of 20 mesh to 40 mesh In the ethanol solution of diethyl ester and cinchonine, stir at 35°C for 6 hours, dry at 60°C for 6 hours, and bake at 150°C for 8 hours after ethanol is completely evaporated to obtain Catalyst-3 loaded with stabilizers and modifiers.

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 provides a preparation method of guaiacol. According to the method, catechol and methanol are subjected to an etherification reaction under the action of a catalyst to generate guaiacol, and the catalyst contains an alkaloid modifier and a thiophosphate stabilizer. According to the method, the yield of the guaiacol is increased while the service life of the catalyst is prolonged, the regeneration frequency of the catalyst is reduced, the purification difficulty of the product is reduced, and the economical efficiency of guaiacol prepared through a catechol methylation method is further improved; herein, the conversion rate of catechol is larger than 80%, the selectivity of guaiacol is larger than 95%, and carbon deposition rate of the catalyst is less than 5% after working for 3000 hours.

Description

technical field [0001] The invention belongs to the field of catalytic synthesis, and in particular relates to a preparation method of guaiacol. Background technique [0002] Guaiacol is white or yellowish crystal or colorless to pale yellow transparent oily liquid with aromatic smell and is widely used in industry to produce various fragrances such as eugenol, vanillin and artificial musk. Guaiacol is also widely used in medicine. It can be used to synthesize guaiacol benzenesulfonate, used as a local anesthetic or antiseptic, and can also eliminate phlegm and treat indigestion. Due to its reductive properties, guaiacol is often added in a small amount as an antioxidant in cosmetics. Because guaiacol reacts with oxygen to produce dark colors, it is also used as a dye. In addition, guaiacol can also be used as a raw material for organic synthesis and as a standard substance for analysis and determination. [0003] The preparation methods of guaiacol include the following ...

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
IPC IPC(8): C07C41/09C07C43/23B01J29/85B01J29/83B01J27/18B01J31/02
CPCC07C41/09B01J29/83B01J29/85B01J27/1806B01J31/0269B01J2231/4288C07C43/23Y02P20/584
Inventor 吕艳红马岩龙李盼牟通李俊平
Owner WANHUA CHEM GRP
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