Catalyst for preparing dihydroxyacetone through oxidation of glycerol and preparation method and application of catalyst

A dihydroxyacetone and catalyst technology, which is applied in the field of catalysts and preparations for the preparation of dihydroxyacetone by oxidation of glycerin, can solve the problems of complex preparation process, many by-products, low catalytic activity, etc., achieve broad application prospects, small equipment corrosion, The effect of mild conditions

Active Publication Date: 2019-05-28
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In 2007, Claus etc. successfully synthesized DHA on the Au-based catalyst for the first time, and the selectivity of DHA was 26%. (1-4),637-643), but still far below the catalytic activity of Bi-Pt / C catalyst
In addition, many metal-organic complex catalysts and heteropolyacid catalysts have also been applied to the reaction of glycerol oxidation to prepare dihydroxyacetone, but the preparation process of metal-organic complex catalysts is relatively complicated, and recycling is difficult, and the introduction of organic solvents is also difficult. The post-treatment process of the product is increased; the stability of the heteropolyacid catalyst is poor, the active component is easy to lose, and there are many by-products of the reaction, which increases the difficulty of post-treatment of the product

Method used

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  • Catalyst for preparing dihydroxyacetone through oxidation of glycerol and preparation method and application of catalyst
  • Catalyst for preparing dihydroxyacetone through oxidation of glycerol and preparation method and application of catalyst
  • Catalyst for preparing dihydroxyacetone through oxidation of glycerol and preparation method and application of catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 28.69g of copper nitrate and 2.46g of zirconium nitrate were dissolved in 100g of deionized water and stirred for 0.5h to form A solution. Dissolve 13.25g of sodium carbonate in 100g of deionized water and stir for 0.5h to form solution B. Quickly add solution B to solution A, stir evenly, put it in a water bath at 70°C for aging for 1 hour, filter, wash with deionized water until the filtrate is neutral, and obtain a blue-green block sample, dry it in an oven at 110°C for 12 hours, and grind it into The powder was placed in a muffle furnace and calcined at 600°C for 4 hours to obtain the finished carrier. Take 1g of the above carrier product, disperse it into 50g of water, add 2ml of NaAuCl 4 (10mg / mL) precursor aqueous solution, then added 2.44g urea, stirred at room temperature for 30min, stirred at 80°C for 6h, then aged at room temperature for 12h, and then washed with deionized water until there was no residual Cl in the filtrate — ions, dried at 110°C for 4h, a...

Embodiment 2

[0028] 27.18g of copper nitrate and 4.92g of zirconium nitrate were dissolved in 100g of deionized water, and stirred for 0.5h to form A solution. Dissolve 13.25g of sodium carbonate in 100g of deionized water and stir for 0.5h to form solution B. Quickly add solution B to solution A, stir evenly, put it in a water bath at 70°C for aging for 1 hour, filter, wash with deionized water until the filtrate is neutral, and obtain a blue-green block sample, dry it in an oven at 110°C for 12 hours, and grind it into The powder was placed in a muffle furnace and calcined at 600°C for 4 hours to obtain the finished carrier. Take 1g of the above carrier product, disperse it into 50g of water, add 2ml of NaAuCl 4 (10mg / mL) precursor aqueous solution, then added 2.44g urea, stirred at room temperature for 30min, stirred at 80°C for 6h, then aged at room temperature for 12h, and then washed with deionized water until there was no residual Cl in the filtrate — ions, dried at 110°C for 4h, ...

Embodiment 3

[0031]24.16g of copper nitrate and 9.83g of zirconium nitrate were dissolved in 100g of deionized water, and stirred for 0.5h to form A solution. Dissolve 13.25g of sodium carbonate in 100g of deionized water and stir for 0.5h to form solution B. Quickly add solution B to solution A, stir evenly, put it in a water bath at 70°C for aging for 1 hour, filter, wash with deionized water until the filtrate is neutral, and obtain a blue-green block sample, dry it in an oven at 110°C for 12 hours, and grind it into The powder was placed in a muffle furnace and calcined at 600°C for 4 hours to obtain the finished carrier. Take 1g of the above carrier product, disperse it into 50g of water, add 2ml of NaAuCl 4 (10mg / mL) precursor aqueous solution, then added 2.44g urea, stirred at room temperature for 30min, stirred at 80°C for 6h, then aged at room temperature for 12h, and then washed with deionized water until there was no residual Cl in the filtrate — ions, dried at 110°C for 4h, a...

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Abstract

The invention relates to a catalyst for preparing dihydroxyacetone through oxidation of glycerol and a preparation method and application of the catalyst, and belongs to the technical field of chemical catalysis. The catalyst is a catalyst for preparing the dihydroxyacetone through oxidation of the glycerol, wherein the catalyst is an Au-based catalyst, a carrier of the catalyst is a copper zirconium composite oxide, and the molar ratio of cuprum to zirconium in the carrier of the catalyst is (1:100) to (100:1). The invention further accordingly provides the preparation method of the catalyst,and application of the catalyst in preparation of dihydroxyacetone through oxidation of the glycerol. According to the prepared supported Au catalyst, the dihydroxyacetone (DHA) can be prepared through high-efficiency catalytic oxidation of the glycerol in a heterogeneous alkali medium, the conversion rate of the glycerol can reach 80%, and the selectivity of the DHA can reach 95% or above. The reaction process conditions are mild, equipment corrosion is small, environmental protection is achieved, the present industrialization amplification requirements are achieved, and the catalyst has broad application prospects.

Description

technical field [0001] The invention belongs to the technical field of chemical catalysis, and specifically relates to a catalyst for preparing dihydroxyacetone by oxidation of glycerin, a preparation method and application thereof. Background technique [0002] Dihydroxyacetone (DHA) is an important chemical raw material, pharmaceutical intermediate and functional additive, widely used in cosmetics. Especially as a sunscreen, it has a special effect, which can prevent the excessive evaporation of skin moisture, and play the role of moisturizing, sun protection and anti-ultraviolet radiation; it can also be used as a covering agent for the skin of patients with vitiligo, so that the skin of patients can be in normal color; as an important DHA has been successfully used in the treatment of diabetes. Its effect is similar to that of glucose, which can greatly enhance respiratory rate and oxygen consumption, and effectively inhibit the generation of excess acetoacetic acid; in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B01J37/10C07C45/39C07C49/17
Inventor 赵宁肖福魁王烟霞蒲彦锋李枫李磊王峰
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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