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Preparation method of silicon dioxide and graphene oxide reinforced copper alginate aerosol catalyst

A copper alginate, silica technology, applied in chemical instruments and methods, preparation of organic compounds, organic compounds/hydrides/coordination complex catalysts, etc., can solve the problems of low mechanical properties and achieve good mechanical properties , the effect of high conversion rate and high reactivity

Inactive Publication Date: 2019-03-08
CHANGCHUN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Overcoming the disadvantages of low mechanical properties of copper alginate aerosol catalyst

Method used

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  • Preparation method of silicon dioxide and graphene oxide reinforced copper alginate aerosol catalyst
  • Preparation method of silicon dioxide and graphene oxide reinforced copper alginate aerosol catalyst
  • Preparation method of silicon dioxide and graphene oxide reinforced copper alginate aerosol catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Take thirteen groups of catalysts for multiple tests, weigh 1.0 g (10 mmol) of phenol and 50 mg of catalyst according to the mass ratio of phenol and catalyst of 20:1, and weigh the ratio of phenol mass g to reaction medium volume mL as 1 :30 , weigh 30 mL of water; put the weighed phenol, catalyst and water into a three-necked flask, place the three-necked flask in a constant temperature water bath, and stir under magnetic force, when the temperature reaches 70 °C, the phenol and hydrogen peroxide 2 mL (20 mmol) of hydrogen peroxide weighed at a molar ratio of 1:2 was added dropwise to the three-neck flask at a rate of 0.1 mL / min, and the reaction time was started after the addition was completed. The reaction time was 1 h, and the target product. The reaction solution after the reaction in the examples was suction filtered to separate the catalyst and the reaction solution.

[0037] The activity data of the catalyst for phenol hydroxylation are shown in Table 1.

[...

Embodiment 2

[0041] Take the thirteenth group of catalysts in the orthogonal test, weigh 1.0 g (10 mmol) of phenol and 20 mg of catalyst according to the mass ratio of phenol and catalyst of 50:1, and weigh the ratio of 1:30 according to the mass of phenol and the volume of the reaction medium g / mL, weigh 30 mL of water; put the weighed phenol, catalyst and water into a three-necked flask, place the three-necked flask in a constant temperature water bath, and stir under magnetic force. When the temperature reaches 70 °C, the phenol and Hydrogen peroxide 3 mL (30 mmol) weighed with a hydrogen peroxide molar ratio of 1:3 was added drop by drop into the three-necked flask at a rate of 0.1 mL / min. target product. The reaction solution after the reaction in the examples was suction filtered to separate the catalyst and the reaction solution.

Embodiment 3

[0043] Take the thirteenth group of catalysts in the orthogonal test, weigh 1.0 g (10 mmol) of phenol and 10 mg of the catalyst according to the mass ratio of phenol and catalyst of 100:1, and weigh the ratio of the mass of phenol to the volume of the reaction medium as 1:30 g / mL, weigh 30 mL of water; put the weighed phenol, catalyst, and water into a three-necked flask, place the three-necked flask in a constant temperature water bath, and under magnetic stirring, when the temperature reaches 30 °C, the phenol and Hydrogen peroxide 1 mL (20 mmol) weighed with a hydrogen peroxide molar ratio of 1:1 was added drop by drop into a three-necked flask at a rate of 0.1 mL / min, and the reaction time was started after the addition was completed. The reaction time was 2 h, and target product. The reaction solution after the reaction in the examples was suction filtered to separate the catalyst and the reaction solution.

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Abstract

The invention discloses a preparation method of a silicon dioxide and graphene oxide reinforced copper alginate aerosol catalyst. By introducing inorganic reinforcement silicon dioxide and graphene oxide, the mechanical performance of metal copper alginate aerosol is improved. The preparation method of the silicon dioxide and graphene oxide reinforced copper alginate aerosol catalyst comprises thesteps of adding the graphene oxide to distilled water; performing ultrasonic treatment on an obtained mixture till the mixture is uniformly dispersed; adding sodium alginate to the dispersed mixtureand introducing silicon dioxide into the mixture; adding water to the mixture to mechanically stir the mixture to a uniform viscous stage; dripping the obtained viscous liquid into a mold; immerging the mold into a metal copper solution to perform constant temperature reaction; freezing and drying a reaction product to obtain a finished product. The preparation method of the silicon dioxide and graphene oxide reinforced copper alginate aerosol catalyst, disclosed by the invention, has the advantage that the mechanical performance of the copper alginate aerosol catalyst is greatly improved.

Description

technical field [0001] The invention relates to a preparation method of silicon dioxide and graphene oxide enhanced copper alginate aerosol catalyst. Background technique [0002] Alginate is widely used in food, medicine, textile, printing and dyeing, papermaking, daily chemical and other products, as thickener, emulsifier, stabilizer, adhesive, sizing agent, etc. [0003] Alginate is a polymer compound extracted from brown algae, which is connected by β-D-mannuronic acid (M unit) and α-L-guluronic acid (G unit) by 1,4-glycosidic bonds. And it is a linear polysaccharide composed of different GGG and MMM fragments. It is the only polysaccharide that can dissolve in water at room temperature to form a hydrosol, and its linear long molecular chain is similar to that of pure polyuronic acid. [0004] The good adsorption performance of natural polysaccharide alginate for metals provides conditions for it to be used as a metal catalyst support. At the same time, metal alginate...

Claims

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Application Information

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IPC IPC(8): B01J31/06C07C37/58C07C39/08
CPCC07C37/58B01J31/06B01J2231/4288B01J35/23C07C39/08
Inventor 史丰炜单聪侯亚恒钟鑫
Owner CHANGCHUN UNIV OF TECH
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