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

Preparation and application of multi-phase catalyst for use in synthesis of vanillin

A heterogeneous catalyst and catalyst technology, applied in the preparation of organic compounds, carbon-based compounds, physical/chemical process catalysts, etc., can solve the problems of no industrial application value, difficult post-processing, low catalytic effect, etc., to achieve strong industrial The effect of application value, easy separation and purification, and low price

Inactive Publication Date: 2012-07-04
EAST CHINA UNIV OF SCI & TECH
View PDF3 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These catalysts not only have low catalytic effect, but also have difficulty in post-processing, are difficult to recycle and cause serious pollution, and have no industrial application value.

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 and application of multi-phase catalyst for use in synthesis of vanillin
  • Preparation and application of multi-phase catalyst for use in synthesis of vanillin
  • Preparation and application of multi-phase catalyst for use in synthesis of vanillin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Weigh 1.46gCo(NO 3 ) 2 ·6H 2 O, 1.21gFe(NO 3 ) 3 9H 2 O was prepared into a mixed solution with a certain concentration, and 0.5mol / L NaOH solution was slowly added dropwise to the mixed solution, titrated to pH=9 under vigorous stirring, aged at 60°C for 4 hours, filtered and washed to neutralize the precipitate. Dry at 120°C, bake in a muffle furnace at 400°C for 5 hours, cool and grind to obtain #1 catalyst, and use the implementation plan for evaluation.

Embodiment 2

[0020] Weigh 1.46gCo(NO 3 ) 2 ·6H 2 O, 1.21gFe(NO 3 ) 3 9H 2 O, 0.121gCu(NO 3 ) 2 ·3H 2 O is prepared into a mixed solution with a certain concentration, and 0.25mol / L Na 2 CO 3 The solution was slowly added dropwise to the mixture, titrated to pH=10 under vigorous stirring, aged at 60°C for 4 hours, filtered and washed to neutralize the precipitate. Dry at 120°C, bake in a muffle furnace at 400°C for 5 hours, cool and grind to obtain #2 catalyst, and use the implementation scheme for evaluation.

Embodiment 3

[0022] Weigh 0.876gCo(NO 3 ) 2 ·6H 2 O, 1.21gFe(NO 3 ) 3 9H 2 O, 0.215gZr(NO 3 ) 4 ·5H 2 O was prepared into a mixed solution with a certain concentration, and 0.5 mol / L NaOH solution was slowly added dropwise to the mixed solution, titrated to pH=9 under vigorous stirring, aged at 60°C for 5 hours, filtered and washed to neutralize the precipitate. Drying at 120°C, roasting in a muffle furnace at 400°C for 6 hours, cooling and grinding to obtain catalyst #3, which was evaluated using the implementation plan.

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 preparation and an application of a (a)Co(b)Fe(x)M(y)O type multi-phase catalyst for catalyzing oxosynthesis of vanillin (3-methoxy-4-hydroxy benzaldehyde). The (a)Co(b)Fe(x)M(y)O type multi-phase catalyst is prepared by taking cobalt and iron as active ingredients, adding one or more of elements including copper, manganese, zirconium, cerium, niobium, nickel, bismuth, lanthanum and the like for serving as cocatalyst(s), taking an alkaline solution as a precipitant and adopting a coprecipitation method. The vanillin is prepared by the following steps of: dissolving 3-methoxy-4-hydroxy salicylic alcohol into a methanol solution of an alkali metal hydroxide; adding a catalyst; putting a reaction liquid into a high-pressure kettle; charging oxygen or air in a heating state; efficiently finishing an oxidation reaction; separating simply; and neutralizing. The transformation ratio of the 3-methoxy-4-hydroxy salicylic alcohol is over 94 percent, the selectivity of the vanillin is up to 93 percent, and the yield of the vanillin is up to 88 percent. The catalyst is easy to prepare, has low cost, is easy to separate after reacting, and can be used circularly after being simply treated; an high selectivity of the vanillin is kept while high transformation ratio of the 3-methoxy-4-hydroxy salicylic alcohol is ensured. The preparation has the advantages of high product yield, high purity, capability of directly recovering an alcohol solvent, small environmental pollution, low production cost and the like, and has a good application prospect in industrial synthesis of vanillin.

Description

technical field [0001] The invention relates to the preparation and application of a heterogeneous catalyst for the catalytic oxidation of 3-methoxy-4-hydroxybenzyl alcohol to synthesize vanillin. technical background [0002] The scientific name of vanillin is 3-methoxy-4-hydroxybenzaldehyde, which has the unique sweet aroma of vanilla. It is one of the most widely used spices at present. Because of its elegant and refreshing aroma, it is widely used in fixatives, flavor enhancers, coordinating agents and cosmetics, soaps, blended spices, cigarettes, pastries, candies and baked goods It can also be used as a plant growth promoter, fungicide, lubricating oil defoamer, etc. At present, vanillin is mainly obtained by chemical synthesis in industry, and its main synthesis methods include glyoxylic acid method, guaiacol method, lignin method, safrole method, eugenol method, p-hydroxybenzaldehyde method, 4-methyl Guaiacol method, p-cresol method, direct oxidation method of vani...

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): B01J23/75B01J23/889B01J23/843B01J23/83B01J23/847B01J23/755C07C47/58C07C45/38
CPCY02P20/584
Inventor 王筠松叶小玲卢冠忠郭杨龙郭耘王丽詹望成王艳芹刘晓晖
Owner EAST CHINA UNIV OF SCI & 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