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

Alpha,beta-unsaturated aldehyde selective hydro-conversion catalyst as well as preparation method and application thereof

A technology for aldehyde selectivity and hydrogenation conversion, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc. Solve problems such as leaching and catalyst deactivation, and achieve the effects of adjustable pore size, easy synthesis, improved reaction selectivity, and high specific surface area

Active Publication Date: 2021-03-23
SOUTHEAST UNIV
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Purpose of the invention: To solve the problems of conventional supported selective catalytic hydrogenation catalysts such as competitive adsorption of reaction substrates, poor selectivity to target products, easy leaching of active components under working conditions and deactivation of the catalyst, the present invention provides an α,β- A catalyst for the selective hydrogenation conversion of unsaturated aldehydes, and a preparation method of the catalyst is provided; in addition, the invention also provides an application of the catalyst for the selective catalytic hydrogenation of α, β-unsaturated aldehydes to prepare unsaturated alcohols

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
  • Alpha,beta-unsaturated aldehyde selective hydro-conversion catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A preparation method of α, β-unsaturated aldehyde selective hydrogenation conversion catalyst, comprising the following steps:

[0030] (1) Take 0.08g CuO and disperse it in 100mL of absolute ethanol, slowly add 1.50g of polyvinylpyrrolidone;

[0031] (2) After the above-mentioned mixture was stirred at room temperature for 12 hours and mixed evenly, it was added to a mixed solution containing 50mL of deionized water, 50mL of absolute ethanol, and 4mL of ammonia water (28wt%), and 1.5g of cetyl tris Methyl ammonium bromide and 3.0g tetraethyl orthosilicate, stirred at room temperature for 12h, mixed evenly, transferred to a hydrothermal reaction kettle, reacted at 120°C for 15h, cooled naturally, centrifuged and washed the reaction liquid, Dry at 80°C for 15 hours to obtain CuO@SiO 2 ;

[0032] (3) CuO@SiO obtained in step (2) 2 Disperse in 30mL aqueous solution containing 0.20g cerium nitrate hexahydrate, stir at room temperature for 15h, dry at 80°C for 15h, and ro...

Embodiment 2

[0036] A preparation method of α, β-unsaturated aldehyde selective hydrogenation conversion catalyst, comprising the following steps:

[0037] (1) Take 0.06g PtO 2 Disperse in 90mL of absolute ethanol, slowly add 1.30g of polyvinylpyrrolidone;

[0038] (2) After the above-mentioned mixed material was stirred at room temperature for 10 h and mixed evenly, it was added to a mixed solution containing 45 mL of deionized water, 45 mL of absolute ethanol, and 3.7 mL of ammonia water (28 wt%), and 1.2 g of hexadecyl was added during the stirring process. Trimethylammonium bromide and 2.8g tetraethyl orthosilicate, stirred at room temperature for 10h, mixed evenly, transferred to a hydrothermal reaction kettle, reacted at 180°C for 10h, cooled naturally, centrifuged and washed the reaction solution , dried at 120°C for 10 h to obtain PtO 2 @SiO 2 ;

[0039] (3) the PtO obtained in step (2) 2 @SiO 2 Disperse in 20mL aqueous solution containing 0.30g indium nitrate, stir at room t...

Embodiment 3

[0043] A preparation method of α, β-unsaturated aldehyde selective hydrogenation conversion catalyst, comprising the following steps:

[0044] (1) Take 0.15g NiO and disperse it in 110mL absolute ethanol, slowly add 1.70g polyvinylpyrrolidone;

[0045] (2) After the above mixed material was stirred at room temperature for 15 hours and mixed evenly, it was added to a mixed solution containing 55mL of deionized water, 55mL of absolute ethanol, and 4.2mL of ammonia water (28wt%), and 1.8g of hexadecyl was added during the stirring process. Trimethylammonium bromide and 3.2g ethyl orthosilicate, stirred at room temperature for 15h, mixed evenly, transferred to a hydrothermal reaction kettle, reacted at 140°C for 14h, cooled naturally, centrifuged and washed the reaction solution , dried at 90°C for 14h to obtain NiO@SiO 2 ;

[0046] (3) NiO@SiO obtained in step (2) 2 Disperse in 55mL aqueous solution containing 0.35g ammonium metavanadate, stir at room temperature for 8h, dry a...

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 alpha,beta-unsaturated aldehyde selective hydro-conversion catalyst as well as a preparation method and application thereof. The catalyst takes metal M as a core and poroussilicon dioxide as a shell to form an M-coated SiO2 core-shell structure, then other metal oxides M'O are loaded on the surface of a SiO2 shell layer, and the M'Ox / M-coated SiO2 catalyst is prepared through reduction. The M'Ox / M-coated SiO2 catalyst has two active surfaces with different catalytic properties, i.e., in-core M and out-core M'Ox; and as SiO2 has a porous structure, H2 is greatly different from alpha,beta-unsaturated aldehydes in kinetic diameter and is influenced by mass transfer resistance, H2 molecules enter the surface of M in the core to be subjected to activated dissociationto form H, and H overflows to the surface to react with the alpha,beta-unsaturated aldehydes adsorbed and activated by M'Ox. The catalyst provided by the invention can reduce competitive adsorption of a reaction substrate, improve selectivity, reduce intranuclear M sintering and improve catalyst stability. The alpha,beta-unsaturated aldehyde selective hydro-conversion catalyst is used for preparing unsaturated alcohol through catalytic hydrogenation of alpha,beta-unsaturated aldehyde, and the catalytic conversion rate of the alpha,beta-unsaturated aldehyde and the selectivity of the unsaturated alcohol are effectively improved.

Description

technical field [0001] The invention belongs to the technology of industrial catalysts, in particular to an α, β-unsaturated aldehyde selective hydrogenation conversion catalyst and its preparation method and application. Background technique [0002] α,β-Unsaturated aldehydes can be selectively hydrogenated to unsaturated alcohols, saturated aldehydes and saturated alcohols. Among them, unsaturated alcohol is an important raw material in the production process of pesticides, spices, medicines, resins and other fine chemical products. However, due to the higher bond energy of the C=O bond than the C=C bond, the selective hydrogenation of α,β-unsaturated aldehydes is thermodynamically and kinetically favored for C=C bond hydrogenation rather than C=O bond hydrogenation. Therefore, enhancing the hydrogenation selectivity of C=O bonds to unsaturated alcohols has always been a great challenge in fundamental research and industrial applications. [0003] Noble metals Pt, Pd, R...

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): B01J23/83B01J23/62B01J23/847B01J23/44C07D307/44C07D307/42C07C29/141C07C33/32C07C33/02
CPCB01J23/83B01J23/62B01J23/8472B01J23/44C07D307/44C07D307/42C07C29/141B01J35/397C07C33/32C07C33/02
Inventor 吴东方张金鑫
Owner SOUTHEAST UNIV
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