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A kind of supported noble metal catalyst and preparation method thereof for preparing phenylacetaldehyde from benzofuran

The technology of a supported catalyst and benzofuran is applied in the field of supported precious metal catalysts and their preparation, which can solve the problems of high requirements on the load intensity of equipment and materials, large energy consumption and the like, and achieves low cost, simple process flow, activity and selectivity. high effect

Active Publication Date: 2022-03-01
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These two electrolytic methods for preparing phenylacetaldehyde have good selectivity, relatively high yield, easy separation of products, and mild reaction conditions, but this synthesis method consumes a lot of energy and requires high load strength for equipment materials

Method used

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  • A kind of supported noble metal catalyst and preparation method thereof for preparing phenylacetaldehyde from benzofuran
  • A kind of supported noble metal catalyst and preparation method thereof for preparing phenylacetaldehyde from benzofuran

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Take 2g high specific surface area granular γ-Al 2 o 3 (particle size 20 ~ 40 mesh), placed in a beaker, the solution mass fraction is 40% Mg (NO 3 ) 2 ·6H 2 O solution impregnated the carrier with equal volume for 12 hours, dried in an oven at 110°C for 12 hours, and finally calcined in a muffle furnace at a heating rate of 5°C / min from room temperature to 600°C for 5 hours, and set aside.

[0025] Take 2g of the prepared composite carrier, place it in a beaker, impregnate it with equal volume according to the load of metal platinum (platinum source is chloroplatinic acid) at 0.5%, let it stand for 12h, put it in an oven at 110°C for 12h, and then place it in Calcined in a muffle furnace, the heating rate was 5°C / min from room temperature to 600°C, and calcined for 2h to obtain the catalyst.

[0026] Take 0.2g catalyst and put it into the constant temperature zone of the fixed bed, feed the catalyst with hydrogen, raise the temperature to 300°C at a temperature of ...

Embodiment 2

[0028] Replace gamma-Al in embodiment 1 with activated carbon 2 o 3 , other steps are with embodiment 1.

Embodiment 3

[0030] with TiO 2 Instead of γ-Al in Example 1 2 o 3 , other steps are with embodiment 1.

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Abstract

The invention belongs to the technical field of catalysts. Specifically relates to a supported noble metal catalyst for preparing phenylacetaldehyde from benzofuran and a preparation method thereof. The catalyst is composed of a carrier and an active metal, and is prepared by an equal-volume impregnation method, and the prepared catalyst has high selectivity and yield to phenylacetaldehyde. The present invention mainly relates to the catalytic reaction performance of benzofuran to benzofuran obtained by catalysts with different contents of active components on carriers with fixed shapes. Long service life, high yield of phenylacetaldehyde, and good industrial application prospects.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a supported noble metal catalyst for preparing phenylacetaldehyde from benzofuran and a preparation method thereof. Background technique [0002] Benzofuran can be isolated from coal tar. Mix heavy benzene and light oil fractions, and distill and cut 160-215 fractions, which contain about 4% benzofuran. [0003] Phenylacetaldehyde is an oily colorless liquid with strong hosta aroma, and is a widely used intermediate in organic synthesis. In terms of spices, acetal spices can be prepared, which is an important spice blending agent; in terms of environment, Schiff base can be prepared to purify waste water; in terms of pesticides, it is an efficient pest inhibitor; phenylacetaldehyde is also used in food additives, cosmetics and soaps, etc. aspect. At present, the common industrial production method of phenylacetaldehyde is to prepare phenylacetaldehyde by oxidatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/58B01J23/648B01J23/63B01J29/44C07C45/00C07C47/228
CPCB01J23/58B01J23/6484B01J23/63B01J29/44C07C45/00C07C47/228
Inventor 鲁墨弘张朋李明时张伟
Owner CHANGZHOU UNIV