Method for producing 1,3-dihydroxyacetone through catalytic oxidation with supported gold catalyst

A dihydroxyacetone, gold catalyst technology, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the selectivity drop of 1,3-dihydroxyacetone large, low glycerol conversion rate, etc., to achieve the effects of good industrial prospects, simple preparation process, and easy availability of reaction raw materials

Inactive Publication Date: 2016-03-30
SHAANXI NORMAL UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Recently, Shu-Sen Liu et al. found that using Au / CuO as a catalyst, under neutral conditions, when the molar ratio of glycerol to gold was 1000, a higher selectivity of 1,3-dihydroxyacetone (82.3%) was obtained, but the conversion rate of glycerol was lower (20%), when increasing the ratio of glycerol to gold (100), glycerol is fully converted, but the selectivity of 1,3-dihydroxyacetone drops significantly (54.6%) (ACSCatal.,2014,4:2226-2230 .)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] According to the molar ratio of glycerol to gold of 100:1, 24mL of 0.1mol / L aqueous glycerin solution and 0.1576g of 3% Au / spinel (the molar ratio of copper and aluminum in the spinel is 5:1) were added to a 50mL autoclave, After sealing completely, evacuate with high-purity oxygen at room temperature for three times, then fill with 1.0MPa high-purity oxygen, stir and heat to 80°C, and react at constant temperature for 2 hours. After the reaction, cool to room temperature with ice bath, centrifuge and filter. The reaction solution was detected by high performance liquid chromatography, and the conversion rate of glycerin and the yield of 1,3-dihydroxyacetone were determined. The analysis shows that the conversion rate of glycerin is 76.7%, and the selectivity of 1,3-dihydroxyacetone is 97.3%.

Embodiment 2

[0015] According to the molar ratio of glycerol to gold of 100:1, 24mL of 0.1mol / L aqueous glycerin solution and 0.1576g of 3% Au / ZnO were added to a 50mL autoclave. Fill with 1.0MPa high-purity oxygen, stir and heat to 80°C, and react at constant temperature for 2 hours. After the reaction, cool to room temperature with an ice bath, centrifuge and filter, and perform high-performance liquid chromatography detection on the reaction solution to measure the conversion rate of glycerol and 1 , The yield of 3-dihydroxyacetone. The analysis shows that the conversion rate of glycerin is 87.1%, and the selectivity of 1,3-dihydroxyacetone is 74.8%.

Embodiment 3

[0017] According to the molar ratio of glycerol to gold of 100:1, add 24mL of 0.1mol / L glycerin aqueous solution and 0.1576g of 3% Au / copper aluminum hydrotalcite into a 50mL autoclave. After sealing completely, evacuate with high-purity oxygen at room temperature Three times, then filled with 1.0MPa high-purity oxygen, stirred and heated to 80°C, and reacted at constant temperature for 2 hours. After the reaction, cooled to room temperature with an ice bath, centrifuged and filtered, and the reaction liquid was detected by high performance liquid chromatography to determine the conversion of glycerol rate and the yield of 1,3-dihydroxyacetone. According to the analysis, the conversion rate of glycerin is 61.5%, and the selectivity of 1,3-dihydroxyacetone is 98.0%.

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Abstract

The invention discloses a method for producing 1,3-dihydroxyacetone through catalytic oxidation with a supported gold catalyst. According to the method, a glycerin aqueous solution and oxygen are used as raw materials, ZnO, Cu-Al hydrotalcite or spinel supported gold is used as the catalyst, and high selectivity conversion from glycerin to the 1,3-dihydroxyacetone in an oxidation manner is realized in the absence of alkali. The method is performed in the absence of alkali, has low requirement for reaction equipment and is low in investment; the catalyst preparation technology is simple, reaction raw materials are easy to obtain, the reaction process is mild, the method is environment-friendly and free of pollution, the catalyst has advantages of convenience in recovery, long service life and the like, and the industrial prospect is bright.

Description

technical field [0001] The invention belongs to the technical field of preparation of 1,3-dihydroxyacetone, and in particular relates to a method for producing 1,3-dihydroxyacetone by catalytically oxidizing glycerin with a supported gold catalyst. Background technique [0002] Today, as the reserves of fossil non-renewable resources are decreasing, prices are rising, and the ecological environment is becoming more and more serious due to the greenhouse effect, research on the synthesis of fuels and chemicals from renewable resources such as biomass has attracted more and more attention. As an important platform compound, glycerol mainly comes from the by-products produced in the production process of biodiesel. Due to the continuous expansion of biodiesel production capacity, the supply of glycerol exceeds the demand. How to convert it into high value-added downstream chemicals Products (such as glyceric acid, glyceraldehyde, dihydroxyacetone, lactic acid, etc.) have become...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C45/39C07C49/17B01J23/89B01J23/66
CPCB01J23/005B01J23/007B01J23/66B01J23/8926C07C45/39C07C49/17
Inventor 董文生柯义虎刘春玲杨高源李朵
Owner SHAANXI NORMAL UNIV
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