Novel attapulgite supported palladium hydrogenation catalyst and preparation method thereof

A hydrogenation catalyst and attapulgite technology are applied in the field of preparation of attapulgite-supported palladium catalysts, can solve problems such as no reports, and achieve the effects of high selectivity, low cost and small particle size

Inactive Publication Date: 2010-05-26
赵杰 +2
View PDF0 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the application of attapulgite clay in catalysis has received more and more attention in recent years, there has been no research on using it as

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

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0013] Example 1:

[0014] Weigh a certain mass of attapulgite clay into a beaker, add 4mol / L hydrochloric acid according to a liquid-solid ratio of 8:1, stir magnetically at room temperature for 12h, then centrifuge, wash with distilled water, dry at 105°C, and place it in a desiccator after grinding spare. Use a pipette to transfer 2.0 mL of 0.02 mol / L chloropalladium acid aqueous solution into a 150 mL three-necked flask, and then add 50 mL of deionized water, add 528 mg of acidified attapulgite clay under magnetic stirring, and ultrasonically disperse for 2.5 hours , Make the attapulgite evenly dispersed. Then 10 mL of potassium borohydride solution with a concentration of 0.008 mol / L was added dropwise under the action of magnetic stirring, and stirring was continued for 1.5 hours after the addition was completed, so that the chloropalladium acid solution was completely reduced to palladium nanoparticles. Finally, continue stirring in an oil bath at 80°C for 2 hours until ...

Example Embodiment

[0019] Example 2:

[0020] Weigh a certain quality of attapulgite clay into a beaker, add 2mol / L nitric acid at a liquid-solid ratio of 10:1, stir magnetically at room temperature for 10h, then centrifuge, wash with distilled water, dry at 105°C, and place it in a desiccator after grinding spare. Use a pipette to transfer 1.0 mL of 0.05 mol / L chloropalladium acid aqueous solution into a 150 mL three-necked flask, then add 60 mL of deionized water, add 438 mg of acidified attapulgite clay under magnetic stirring, and ultrasonically disperse for 2 hours. Disperse the attapulgite evenly. Then, 10 mL of potassium borohydride solution with a concentration of 0.01 mol / L is added dropwise under the action of magnetic stirring, and stirring is continued for 1.5 hours after the addition is completed, so that the chloropalladium acid solution is completely reduced to palladium nanoparticles. Finally, continue stirring in an oil bath at 80°C for 2 hours until no bubbles are generated. Th...

Example Embodiment

[0024] Example 3:

[0025] Weigh a certain mass of attapulgite clay into a beaker, add 4mol / L hydrochloric acid at a liquid-to-solid ratio of 10:1, stir magnetically at room temperature for 14h, then centrifuge, wash with distilled water, dry at 105°C, and place it in a desiccator after grinding spare. Use a pipette to transfer 1.0 mL of 0.1 mol / L potassium chloropalladate aqueous solution into a 150 mL three-necked flask, then add 80 mL of deionized water, add 344 mg of acidified attapulgite clay under magnetic stirring, and disperse ultrasonically for 2 hours , Make the attapulgite evenly dispersed. Then 10 mL of potassium borohydride solution with a concentration of 0.02 mol / L is added dropwise under the action of magnetic stirring, and stirring is continued for 1.5 hours after the addition is completed, so that the potassium chloropalladate in the solution is completely reduced to palladium nanoparticles. Finally, continue stirring in an oil bath at 80°C for 2 hours until n...

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

PropertyMeasurementUnit
The average particle sizeaaaaaaaaaa
The average particle sizeaaaaaaaaaa
The average particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention discloses a novel attapulgite supported palladium hydrogenation catalyst and a preparation method thereof. Acidized attapulgite clay is used as a carrier, potassium borohydride or hydrazine hydrate is used as a reducer, and a soluble palladium salt is reduced to palladium nano particles which are loaded on the acidized attapulgite clay. In the attapulgite loaded palladium hydrogenation catalyst prepared by the method of the invention, the palladium nano particles are fine and uniform and are highly dispersed on the surfaces of carbon nano tubes, and compared with the active carbon or graphite loaded palladium catalyst, the attapulgite loaded palladium hydrogenation catalyst has high activity and selectivity for hydrogenating cinnamyl aldehyde to prepare phenylpropyl aldehyde.

Description

technical field [0001] The present invention relates to a catalyst in the reaction of cinnamaldehyde hydrogenation to prepare phenylpropionaldehyde and a preparation method thereof, in particular to a preparation method of an attapulgite-loaded palladium catalyst used to catalyze the hydrogenation of cinnamaldehyde to prepare phenylpropionaldehyde. Background technique [0002] Cinnamaldehyde is an important α, β-unsaturated aldehyde, and its hydrogenation products cinnamyl alcohol and phenylpropionaldehyde are important intermediates in fine chemicals. Phenylpropionaldehyde is a food flavoring additive. It has recently been found that phenylpropionaldehyde is also an important intermediate for the preparation of anti-AIDS drugs. Therefore, research on the selective catalytic hydrogenation of the C=C bond of cinnamaldehyde has attracted much attention. Since cinnamaldehyde has C=C double bond and C=O double bond at the same time, and is conjugated with the aromatic ring, it ...

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): B01J23/44B01J32/00B01J21/16C07C47/228C07C45/62
Inventor 赵杰葛昌华李艳
Owner 赵杰
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products