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A kind of catalyst for the oxidation synthesis of benzaldehyde of benzyl alcohol and its preparation method and application

A technology for oxidative synthesis and benzyl alcohol, which is applied in catalyst activation/preparation, organic compound preparation, carbon-based compound preparation, etc. It can solve the problems of high cost and difficulty in large-scale use, and achieves reduced preparation costs and mild and simple preparation conditions , the effect of mild reaction conditions

Active Publication Date: 2022-05-17
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cost of graphene oxide as a catalyst raw material is relatively high, and it is not easy to use it on a large scale.

Method used

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  • A kind of catalyst for the oxidation synthesis of benzaldehyde of benzyl alcohol and its preparation method and application
  • A kind of catalyst for the oxidation synthesis of benzaldehyde of benzyl alcohol and its preparation method and application
  • A kind of catalyst for the oxidation synthesis of benzaldehyde of benzyl alcohol and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Preparation of manganese dioxide / hydrothermal carbon composite microspheres

[0033]With 5.4g glucose (0.03mol), the manganese nitrate (0.06mol) of 1.0737g, the acrylic acid (0.003mol) of 0.216g, fully dissolve in 60ml deionized water, the above-mentioned mixed solution is placed in the hydrothermal reaction kettle, at 200 ℃ reaction 10h. After cooling, the mixture was washed with deionized water and absolute ethanol until the filtrate was neutral. Grind into powder after drying, take 1g of powder, put it in a beaker containing 100ml of deionized water, add 2g of potassium permanganate, put it on a magnetic stirrer and stir at a speed of 300rpm for 6h, and wash the mixture with deionized water until Neutral, manganese dioxide / hydrothermal carbon composite microspheres are obtained after drying.

[0034] (2) Evaluation of catalytic activity

[0035] Get 0.108g benzyl alcohol (0.001mol), 9.2g toluene (0.1mol), the hydrogen peroxide solution (0.002mol) of 0.227g (30...

Embodiment 2

[0040] (1) Preparation of manganese dioxide / hydrothermal carbon composite microspheres

[0041] 10.3g sucrose (0.03mol), 0.242805g manganese chloride (0.0015mol), 0.108g acrylic acid (0.0015mol), fully dissolved in 30ml deionized water, the above-mentioned mixed solution is placed in a hydrothermal reaction kettle, at 150 ℃ reaction 3h. After cooling, the mixture was washed with deionized water and absolute ethanol until the filtrate was neutral. Grind into powder after drying, take 1g of powder, put it in a beaker containing 100ml of deionized water, add 0.5g of potassium permanganate, stir it on a magnetic stirrer at a speed of 200rpm for 0.5h, and pass the mixture through deionized water After washing to neutrality and drying, manganese dioxide / hydrothermal carbon composite microspheres are obtained.

[0042] (2) Evaluation of catalytic activity

[0043] Get 0.108g benzyl alcohol (0.001mol), 4.6g toluene (0.05mol), the hydrogen peroxide solution (0.0005mol) of 0.057g (30...

Embodiment 3

[0045] (1) Preparation of manganese dioxide / hydrothermal carbon composite microspheres

[0046] Fully dissolve 15g of starch (0.03mol), 4.53g of manganese sulfate (0.03mol), and 1.08g of acrylic acid (0.015mol) in 150ml of deionized water, place the above mixed solution in a hydrothermal reaction kettle, and react at 250°C 24h. After cooling, the mixture was washed with deionized water and absolute ethanol until the filtrate was neutral. Grind into powder after drying, take 1g of powder, put it in a beaker containing 100ml of deionized water, add 10g of potassium permanganate, place it on a magnetic stirrer and stir at a speed of 400rpm for 12h, and wash the mixture with deionized water until Neutral, manganese dioxide / hydrothermal carbon composite microspheres are obtained after drying.

[0047] (2) Evaluation of catalytic activity

[0048] Get 0.108g benzyl alcohol (0.001mol), 13.8g toluene (0.15mol), the hydrogen peroxide solution (0.005mol) of 0.57g (30wt%) mixes with 0...

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Abstract

The invention relates to a catalyst for benzyl alcohol oxidation to synthesize benzaldehyde and its preparation method and application. Firstly, carbon source, manganese salt and acrylic acid are dissolved in deionized water, and hydrothermal reaction is carried out, and the solids generated after the reaction are passed through successively. Filtration, washing and drying to obtain the precursor of the manganese-carbon composite; adding the precursor of the manganese-carbon composite to potassium permanganate in a mass ratio of 1: (0.5-10) into deionized water, stirring and oxidizing at room temperature , and then filtered, washed and dried to obtain a catalyst for the oxidation of benzyl alcohol to benzaldehyde. In the present invention, a manganese-carbon composite precursor is synthesized in one step using manganese salt and carbon source as raw materials through a hydrothermal method with mild conditions, and then utilizes the strong oxidizing property of potassium permanganate to react at room temperature to obtain manganese dioxide / hydrothermal The carbon composite microsphere forms a catalyst for the oxidation of benzyl alcohol to synthesize benzaldehyde, and has simple operation, mild reaction conditions and low raw material cost.

Description

technical field [0001] The invention relates to the technical field of benzaldehyde preparation, in particular to a catalyst for oxidizing benzyl alcohol to synthesize benzaldehyde, a preparation method and application thereof. Background technique [0002] Selective oxidation of alcohols to the corresponding carbonyl compounds plays a crucial role in organic synthesis, as the corresponding aldehydes, ketones, or carboxyl derivatives are important and versatile intermediates for the synthesis of various chemicals, vitamins, drugs, and fragrances. body. As an important fine chemical intermediate, benzaldehyde (commonly known as bitter almond oil) is widely used in the manufacturing industries of medicine, spices, pesticides, dyes and plastics. With the development of the economy, the demand for benzaldehyde in my country is increasing, and the requirements for its quality are also getting higher and higher. At the same time, with the continuous improvement of environmental p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/34B01J37/10B01J37/08C07C45/29C07C47/54
CPCB01J23/34B01J37/10B01J37/082C07C45/294C07C47/54
Inventor 杨金帆敖志锋张宏宇张素风呼旭旭
Owner SHAANXI UNIV OF SCI & TECH
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