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Solid catalyst for synthesizing dihydroxyacetone by glycerol oxidation

A technology for synthesizing dihydroxyacetone and solid catalysts, which is applied in the direction of physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, and preparation of organic compounds, which can solve the problems of active metal loss, catalyst deactivation, Stability needs to be improved to achieve high selectivity, high catalytic activity and selectivity, and easy operation

Active Publication Date: 2020-10-16
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the by-products, such as glyceric acid, will be adsorbed on the additive metals Bi, Ag, etc., which will inhibit the catalyt

Method used

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  • Solid catalyst for synthesizing dihydroxyacetone by glycerol oxidation
  • Solid catalyst for synthesizing dihydroxyacetone by glycerol oxidation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Mix 0.2g of bismuth nitrate, 2g of chitosan and 5g of melamine through mechanical ball milling, the rotating speed of the mechanical ball milling is 30HZ, and the ball milling time is 10min; Calcined at high temperature in the atmosphere for 2 hours; after the calcination, take 1 g of the calcined product and disperse it in 50 mL of deionized water, add 3.98 mL of chloroplatinic acid solution (4.89 mg / mL), stir at room temperature for about 2 hours, then add 0.0228 g of sodium borohydride solution (0.3mol / L), and then stirred for 5h, centrifuged, washed with deionized water, and vacuum-dried to obtain a solid catalyst Pt / BiNC.

[0035] The photo of the solid catalyst Pt / BiNC prepared in this embodiment is as follows figure 1 As shown, it is a black solid powder. The solid catalyst Pt / BiNC prepared in this example was characterized by TEM, figure 2 Transmission electron microscope (TEM) image of the catalyst Pt / BiNC prepared for this example. Depend on figure 2 It ...

Embodiment 2

[0037] Mix 0.2g of bismuth nitrate, 2g of chitosan and 5g of melamine through mechanical ball milling, the rotating speed of the mechanical ball milling is 30HZ, and the ball milling time is 10min; Calcined at high temperature in the atmosphere for 2 hours; after the calcination, disperse 1 g of the calcined product in 50 mL of deionized water, add 3.98 mL of palladium chloride solution (4.89 mg / mL), stir at room temperature for about 2 hours, and then add 0.0228 g of sodium borohydride solution (0.3mol / L), and then stirred for 5h, centrifuged, washed with deionized water, and vacuum-dried to obtain a solid catalyst Pd / BiNC.

Embodiment 3

[0039] Mix 0.2g of bismuth nitrate, 2g of chitosan and 5g of melamine through mechanical ball milling, the rotating speed of the mechanical ball milling is 30HZ, and the ball milling time is 10min; Calcined at high temperature in the atmosphere for 2 hours; after the calcination, disperse 1 g of the calcined product in 50 mL of deionized water, add 2 mL of palladium chloride solution (4.89 mg / mL), stir at room temperature for about 2 hours, and then add 0.0114 g of sodium borohydride solution (0.3mol / L), then stirred for 5h, centrifuged, washed with deionized water, and vacuum-dried to obtain the solid catalyst Pt with low Pt loading. L / BiNC.

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Abstract

The invention discloses a solid catalyst for synthesizing dihydroxyacetone through glycerol oxidation, and belongs to the technical field of catalysis and fine organic chemical engineering. The bismuth-modified porous carbon carrier is prepared from bismuth salt, an organic precursor and a nitrogen source through a mechanical mixing-roasting method; precious metals are loaded to obtain solid catalysts. The solid catalyst has the advantages that the preparation method of the catalyst is simple, convenient and easy to operate, the production cost is low, the glycerol conversion rate (more than 90%) and the glycerol selectivity (more than 90%) are high, the reaction conditions of a reaction system are mild, and the catalyst can be recycled and reused, so that the method is expected to becomean extremely competitive industrial production route for synthesizing dihydroxyacetone by glycerol conversion.

Description

technical field [0001] The invention relates to a solid catalyst for glycerol oxidation to synthesize dihydroxyacetone, which belongs to the technical field of catalysis and fine organic chemical industry. Background technique [0002] Selective oxidation of glycerol can produce a variety of high value-added chemicals, among which 1,3-dihydroxyacetone (DHA) is an important chemical, due to its many functional groups and very active chemical properties, it can synthesize a variety of organic compounds, It is a very valuable chemical intermediate. Dihydroxyacetone can be used as a food additive, antistaling agent, antiviral reagent and cosmetic formulation raw material, etc. It is widely used in food, pharmaceutical, cosmetics and other industries, and has a large market demand. At present, most of the dihydroxyacetone in the domestic market depends on imports. , the market capacity and profit margins are huge. Therefore, the selective catalytic oxidation of glycerol to dihy...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J23/42B01J23/44B01J37/08B01J37/16C07C45/39C07C49/17
CPCB01J27/24B01J23/42B01J23/44B01J35/0013B01J37/0036B01J37/08B01J37/16C07C45/39C07C49/17Y02P20/584
Inventor 冷炎黄宁张萍波董玉明蒋平平
Owner JIANGNAN UNIV
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