Gold/oxide catalyst and application in preparing DHA through catalytic oxidation of glycerol

A technology of oxides and catalysts, applied in gold/oxide catalysts and in the application field of catalytic oxidation of glycerol to prepare DHA, can solve the problems of no research on gold catalysts, achieve good industrial prospects, and the preparation method is simple and easy to operate, and the reaction conditions mild effect

Pending Publication Date: 2019-08-09
BEIFANG UNIV OF NATITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, gold catalysts prepared by phytoreduction have not bee

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0027] Example 1

[0028] The gold / oxide catalyst of this embodiment is prepared by the following method:

[0029] (1) Take 6 g of lilac leaf powder in 100 mL of water, stir at 30°C for 6 hours, then centrifuge and filter to obtain a water extract, which is freeze-dried to obtain a lilac leaf extract;

[0030] (2) Put 12.08g Cu(NO 3 ) 2 ·3H 2 O is dissolved in 200mL deionized water, and 1M Na is added dropwise at the same time 2 CO 3 Adjust pH=10, then put the mixed solution at room temperature and stir for 12h; the obtained mixed solution was filtered and washed to neutrality, and the filter cake was placed in a vacuum oven at 60℃ for 24h. 2 In the atmosphere, the temperature is increased to 350°C at a rate of 2°C / min and fired for 4 hours to obtain the CuO carrier;

[0031] (3) Take 0.99g of CuO carrier in 50mL of deionized water, then add 1.04mL of 48.56mM chloroauric acid solution, stir at 30℃ for 4h, continue to add 100mg of lilac leaf extract, stir for 4h; extract the resulting m...

Example Embodiment

[0035] Example 2

[0036] The gold / oxide catalyst of this embodiment is prepared by the following method:

[0037] (1) Take 6 g of lilac leaf powder in 100 mL of water, stir at 30°C for 6 hours, then centrifuge and filter to obtain a water extract, which is freeze-dried to obtain a lilac leaf extract;

[0038] (2) Put 12.08g Cu(NO 3 ) 2 ·3H 2 O is dissolved in 200mL deionized water, and 1M Na is added dropwise at the same time 2 CO 3 Adjust pH=10, then put the mixed solution at room temperature and stir for 12h; the obtained mixed solution was filtered and washed to neutrality, and the filter cake was placed in a vacuum oven at 60℃ for 24h. 2 In the atmosphere, the temperature is increased to 350°C at a rate of 2°C / min and fired for 4 hours to obtain the CuO carrier;

[0039] (3) Take 0.99g of CuO carrier in 50mL of deionized water, then add 1.04mL of 48.56mM chloroauric acid solution, stir at 30℃ for 4h, continue to add 200mg of lilac leaf extract, stir for 4h; extract the resulting m...

Example Embodiment

[0042] Example 3

[0043] The gold / oxide catalyst of this embodiment is prepared by the following method:

[0044] (1) Take 6g of green peach leaf powder in 100 mL of water, stir at 30°C for 6 hours, then centrifuge and filter to obtain a water extract, which is freeze-dried to obtain a green peach leaf extract;

[0045] (2) Put 12.08g Cu(NO 3 ) 2 ·3H 2 O is dissolved in 200mL deionized water, and 1M Na is added dropwise at the same time 2 CO 3 Adjust pH=10, then put the mixed solution at room temperature and stir for 12h; the obtained mixed solution was filtered and washed to neutrality, and the filter cake was placed in a vacuum oven at 60℃ for 24h. 2 In the atmosphere, the temperature is increased to 350°C at a rate of 2°C / min and fired for 4 hours to obtain the CuO carrier;

[0046] (3) Take 0.99g of CuO carrier in 50mL of deionized water, then add 1.04mL of 48.56mM chloroauric acid solution, stir for 4h at 30℃, continue to add 100mg of Peach leaf extract, stir for 4h; suction filt...

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PUM

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Abstract

The invention provides a gold/oxide catalyst and application in preparing DHA through catalytic oxidation of glycerol. The gold/oxide catalyst is prepared through a method including the steps that 1,plant leaves are aired and crushed, the powder is mixed with water and extracted, then centrifuging and filtering are carried out to obtain an aqueous extract, and freezing and drying are carried outto obtain a plant leaf extract; 2, an oxide carrier is selected; 3, the oxide carrier is mixed with water, then a gold precursor solution is added for stirring, and a mixed solution is obtained; the plant leaf extract is added into the mixed solution and stirred, the obtained material is subjected to suction filtration and washing and is dried in a vacuum drying oven, and then the material is roasted in an air atmosphere in a tubular furnace to obtain the gold/oxide catalyst. The invention also discloses the application of the gold/oxide catalyst in preparing the DHA through catalytic oxidation of the glycerol. The preparation method of the gold/oxide catalyst is simple and easy to operate, reaction raw materials are easy to obtain, reaction conditions are mild and environmentally friendly, and the prepared catalyst is good in catalytic activity and stable.

Description

technical field [0001] The invention relates to a gold / oxide catalyst and its application, in particular to a gold / oxide catalyst and its application in catalyzing the oxidation of glycerin to prepare DHA. Background technique [0002] Glycerol is a by-product in the production process of biodiesel, and with the development of biodiesel, the supply of by-product glycerol exceeds the demand. Therefore, using glycerol as a raw material to produce various high value-added chemicals has attracted widespread attention from academia and industry. Among the downstream products of glycerol, 1,3-dihydroxyacetone (DHA) is widely used in cosmetics, food, medicine and other industries due to its special structure, and the market demand is also increasing. Therefore, through selective oxidation The preparation of DHA from glycerol has important practical significance. [0003] At present, the catalysts used to catalyze the oxidation of glycerol are mainly supported catalysts, among whi...

Claims

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Application Information

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IPC IPC(8): B01J23/52B01J23/89C07C45/39C07C49/17
CPCB01J23/8926B01J23/52C07C45/39C07C49/17
Inventor 刘海王毅敏柯义虎袁振
Owner BEIFANG UNIV OF NATITIES
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