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Method for preparing benzaldehyde catalyst through catalytic oxidation of benzyl alcohol

A catalytic oxidation and catalyst technology, which is applied in catalyst activation/preparation, organic compound preparation, physical/chemical process catalysts, etc., can solve the problems of complex process and corrosive damage of reaction equipment, and achieves low cost of raw materials and a wide range of applications. Wide and controllable shell thickness

Inactive Publication Date: 2018-05-04
XUZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The technological process of this method is complicated, and besides benzaldehyde, the obtained product also contains corrosive by-products such as hydrogen chloride and hypobenyl trichloride, which easily cause corrosive damage to the reaction equipment.

Method used

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  • Method for preparing benzaldehyde catalyst through catalytic oxidation of benzyl alcohol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A kind of preparation method of benzaldehyde catalyst by catalytic oxidation of benzyl alcohol, the method comprises the following steps:

[0015] Step 1, 2molLa 2 o 3 @COF, 20mol propylene oxide, 1mol hydrochloric acid, 100mol deionized water, 20mol anhydrous

[0016] Ethanol was mixed evenly and stirred at 45°C for 60 minutes to obtain a clear transparent solution;

[0017] Step 2, add ammonia water to the above transparent solution to adjust the pH value of the mixed solution to 8.5, and continue to stir evenly at 50°C to obtain a colorless transparent solution; the obtained La 2 o 3 The @COF sol solution was poured into the mold and placed in a 50°C oven for 3 hours to obtain milky white La 2 o 3 @COF wet gel;

[0018] Step 3, add ethanol aging solution to the sample in the mold for aging treatment, replace the solvent 3 times, each time for 24 hours, and finally obtain milky white La 2 o 3 @COF alcohol gel;

[0019] Step 4, and then La 2 o 3 @COF alcohol...

Embodiment 2

[0024] Step 1, 1molLa 2 o 3 @COF, 2mol propylene oxide, 1mol hydrochloric acid, 100mol deionized water, 20mol anhydrous

[0025] Ethanol was mixed evenly at 45°C and stirred for 60 minutes to obtain a clear transparent solution; the rest of the steps were the same as in Example 1.

Embodiment 3

[0027] Step 1, the 4molLa 2 o 3 @COF, 1mol propylene oxide, 1mol hydrochloric acid, 100mol deionized water, 20mol anhydrous

[0028] Ethanol was mixed evenly at 45°C and stirred for 60 minutes to obtain a clear transparent solution; the rest of the steps were the same as in Example 1.

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Abstract

The invention discloses a method for preparing a benzaldehyde catalyst through catalytic oxidation of benzyl alcohol. The method comprises the following steps: taking La2O3@COF, epoxypropane, hydrochloric acid, deionized water, absolute ethyl alcohol, La2O3, benzidine and anhydrous THFA as main raw materials, preparing La2O3@COF aerogel particles by adopting a supercritical CO2 drying technology,preparing wet gel by adopting a simple sol-gel method, and preparing the aerogel particles with uniform pores and high specific surface area by adopting the supercritical drying technology. Accordingto the method disclosed by the invention, the preparation process is novel, raw material cost is low, application range is wide, a normal pressure drying method can be used, a supercritical drying process can also be used, and the obtained catalyst has excellent catalytic performance on the oxidation reaction of benzyl alcohol.

Description

technical field [0001] The invention relates to a catalyst for producing benzaldehyde by catalytic oxidation of benzyl alcohol and a preparation method thereof, belonging to the technical field of catalysts. Background technique [0002] At present, toluene photochlorination hydrolysis is usually used in industry to produce benzaldehyde. The process is to firstly chlorinate toluene to obtain a mixture containing benzyl chloride, benzylidene dichloride and benzyl trichloride, and then convert benzyl chloride from After the mixture is separated, a hydrolysis catalyst is added to the remaining mixture, the temperature is gradually raised, and water is added to carry out hydrolysis. After the hydrolysis is completed, the product is obtained after neutralization, alkali washing and distillation. The process of this method is complicated, and the obtained product contains not only benzaldehyde, but also corrosive by-products such as hydrogen chloride and hypobenzyl trichloride, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/26C07C45/38C07C47/54
CPCC07C45/38B01J31/063B01J31/26B01J37/0236B01J37/036B01J2231/70B01J35/23C07C47/54
Inventor 蔡廷栋韩林峻孟建
Owner XUZHOU NORMAL UNIVERSITY
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