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Method for synthesizing tartronic acid by using basic nitrogen-doped mesoporous carbon-material-supported Pt catalyst

A nitrogen-doped mesoporous carbon and tartronic acid technology is applied in chemical instruments and methods, preparation of organic compounds, catalysts for physical/chemical processes, etc. Simple and diverse, good stability and wide range of raw material sources

Inactive Publication Date: 2019-12-17
GUANGDONG UNIV OF PETROCHEMICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Villa et al. found that the enhancement of the basicity of the carrier improves the activity of the supported Au-Pt alloy catalyst, but also promotes the breakage of the C-C bond, resulting in a decrease in the selectivity of C3 oxidation products, while the Au-Pt alloy catalyst supported by the acidic carrier is Shows higher selectivity to C3 oxidation products (Catal.Sci.Technol.2015,5,1126-1132)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A kind of method utilizing basic nitrogen-doped mesoporous carbon material load Pt catalyst to synthesize tartronic acid, the steps are as follows:

[0049] 1. Catalyst synthesis

[0050] (1) Take 4.88g of phenol and add it to the flask, and melt it completely in a water bath at 41°C, then add 1.04g of 20wt% NaOH solution, stir for 10 minutes, then add 8.4g of 37wt% formaldehyde solution, raise the temperature to 70°C for 1 hour, after the reaction Cool the temperature to room temperature, adjust the pH=7 with 0.6mol / L HCl solution, then evaporate the moisture in a vacuum at 48°C, dissolve the viscous phenolic resin obtained in absolute ethanol, and prepare 20wt% phenolic resin ethanol solution.

[0051] (2) Dissolve 1.0g of F127 and 2.0g of dicyandiamide (DCDA) in a mixed solvent of ethanol (20.0g) and water (10.0g), then add 0.1-0.6g of Mg (NO 3 ) 2 ·6H 2 O and 5.0g phenolic resin ethanol solution (20wt%), stirred, and added dropwise 0.5mol / L HNO 3 The pH of the ...

Embodiment 2

[0058] A kind of method utilizing basic nitrogen-doped mesoporous carbon material load Pt catalyst to synthesize tartronic acid, the steps are as follows:

[0059] 1. Catalyst synthesis

[0060] (1) Dissolve 1.0g of F127 in a mixed solvent of ethanol (15.0g) and water (15.0g), then add 2.0g of dicyandiamide (DCDA), stir at 50°C until completely dissolved, add 1.65g of m-benzene Diphenol and 0.1-0.9gMg(NO 3 ) 2 ·6H 2 0, and dropwise added 0.17mL concentrated HCl, continued to stir for 0.5 hours and then slowly added dropwise 2.27mL formaldehyde solution (37wt%), continued to stir for 1 hour after the dropwise addition, poured the solution into a petri dish, and volatilized 6- 8 hours, and then the remaining viscous mass was further heat cured in an oven at 85°C for 48 hours. Subsequently, the formed composite was scraped off, carbonized in a tube furnace under a nitrogen atmosphere, raised to 350°C at a heating rate of 1°C / min, kept for 3 hours, and then raised to 1000°C at...

Embodiment 3

[0064] A kind of method utilizing basic nitrogen-doped mesoporous carbon material load Pt catalyst to synthesize tartronic acid, the steps are as follows:

[0065] 1. Catalyst synthesis

[0066] (1) Dissolve 1.0g of F127 in a mixed solvent of ethanol (15.0g) and water (15.0g), then add 2.0g of dicyandiamide (DCDA), stir at 50°C until completely dissolved, add 2.50g Phloroglucinol and 0.1-0.9g Mg(NO 3 ) 2 ·6H 2 O, and dropwise add 0.17mL concentrated HCl, continue to stir for 0.5 hours and slowly add 2.36mL formaldehyde solution (37wt%) dropwise, after the dropwise addition, continue to stir for 0.5 hours and then stratification occurs, take the lower layer of liquid and continue to stir for 12 hours to form elastic But not viscous, pour it into a Petri dish, volatilize at room temperature for 6-8 hours, and then further heat-cure the remaining viscous substance in an oven at 85°C for 48 hours. Subsequently, the formed composite was scraped off, carbonized in a tube furnace...

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Abstract

The invention discloses a method for synthesizing tartronic acid by using a basic nitrogen-doped mesoporous carbon-material-supported Pt catalyst. The method comprises the following steps: s1, preparing a nitrogen-doped mesoporous carbon material with a -Ph-O-Mg or -Ph-O-Ca structure; s2, preparing the basic nitrogen-doped mesoporous carbon-material-supported Pt catalyst by utilizing the nitrogen-doped mesoporous carbon material; and s3, catalyzing oxidation of glycerol by using the basic nitrogen-doped mesoporous carbon-material-supported Pt catalyst so as to prepare tartronic acid. The catalyst provided by the invention is adopted to catalyze the oxidation of glycerol to prepare tartronic acid, and has the advantages of simple and diverse synthesis methods, wide raw material sources, lowcost, strong alkalinity, mild reaction conditions, high stability and easiness in recycling.

Description

technical field [0001] The invention relates to the field of tartronic acid preparation, in particular to a method for synthesizing tartronic acid by using a basic nitrogen-doped mesoporous carbon material to support a Pt catalyst. Background technique [0002] Tartronic acid can inhibit the conversion of carbohydrates into fat in the human body, prevent the accumulation of body fat, and can be used for weight loss and prevention of coronary heart disease. Industrially, tartronic acid is mainly prepared from maleic acid by oxidation of potassium permanganate, which has high production cost and serious pollution. However, the catalytic oxidation of glycerol in the liquid phase to prepare tartronic acid has mild reaction conditions, simple by-product components, short production cycle, and little environmental pollution. At present, there are not many reports on the catalytic oxidation of glycerol to produce tartronic acid. Kimura et al. synthesized palladium (Ce-Bi-Pd / C) and...

Claims

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Application Information

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IPC IPC(8): C07C51/235C07C59/245B01J27/24B01J35/10
CPCC07C51/235B01J27/24B01J35/60C07C59/245
Inventor 谭华姚超健詹彤刘卫兵王刚朱佳平
Owner GUANGDONG UNIV OF PETROCHEMICAL TECH
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