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Solid acid catalyst containing catalytic active group and adsorption group and preparation and application of solid acid catalyst

A technology of solid acid catalyst and catalytic activity, applied in the direction of physical/chemical process catalysts, applications, chemical instruments and methods, etc., can solve the problems of low site accessibility, achieve short preparation time, low production cost, and easy recycling Effect

Active Publication Date: 2013-05-08
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The primary purpose of the present invention is to overcome the problem of low accessibility of catalytic active groups to catalytic reaction sites in the process of catalyzing cellulose hydrolysis with traditional solid acid catalysts, and to provide a solid acid catalyst containing catalytic active groups and adsorption groups The preparation method, this preparation method uses sucralose as raw material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Take a certain amount of sucralose and put it into a tubular atmosphere furnace, pre-flow nitrogen to exhaust the air in the furnace, protect it for 10 minutes, and then raise the temperature to 400°C for 15 hours to obtain a dark brown solid. Take 5g of dark brown solid and 50mL of concentrated sulfuric acid (96wt%) and keep the temperature at 150°C for 1 hour. After the reaction is complete, add 1000mL of distilled water at room temperature after cooling to room temperature, and then separate the solid by suction filtration under reduced pressure, and then use distilled water (>80 °C) until the washing solution is neutral, and finally vacuum-dried at 80 °C for 24 hours to obtain a solid acid catalyst containing catalytically active groups and adsorption groups.

[0033] (2) Take 100 mg of cellobiose, add 100 mg of the solid acid catalyst obtained in step (1) and 4 mL of deionized water into a 20 mL vial, seal it with the cap of the vial, and place it in an oil bath...

Embodiment 2

[0035] (1) Take a certain amount of sucralose and put it into a tubular atmosphere furnace, pre-flow nitrogen to exhaust the air in the furnace, protect it for 10 minutes, and then raise the temperature to 500°C for 0.5 hours to obtain a dark brown solid. Take 5g of dark brown solid and 25mL of concentrated sulfuric acid (98wt%) and keep the temperature at 120°C for 15 hours. After the reaction is completed, add 1000mL of distilled water at room temperature after cooling to room temperature, and filter under reduced pressure to separate the solid, then use distilled water (>80 °C) until the washing solution is neutral, and finally vacuum-dried at 80 °C for 48 hours to obtain a solid acid catalyst containing catalytically active groups and adsorption groups.

[0036] (2) Take 100mg of cellobiose, add 100mg of the solid acid catalyst obtained in step (1) and 4mL of deionized water into a 20mL vial, seal it with the cap of the vial, put it in an oil bath at 90°C with a stirring ra...

Embodiment 3

[0038] (1) Take a certain amount of sucralose and put it into a tubular atmosphere furnace, pre-flow nitrogen to exhaust the air in the furnace, protect it for 10 minutes, and then raise the temperature to 300°C for 20 hours to obtain a dark brown solid. Take 5g of dark brown solid and 100mL of concentrated sulfuric acid (96wt%) and keep the temperature at 150°C for 15 hours. After the reaction is completed, add 1000mL of distilled water at room temperature after cooling to room temperature, and then filter the solid under reduced pressure, then use distilled water (>80 °C) until the washing solution is neutral, and finally vacuum-dried at 80 °C for 24 hours to obtain a solid acid catalyst containing catalytically active groups and adsorption groups.

[0039] (2) Take 50 mg of microcrystalline cellulose pretreated by ionic liquid, add 100 mg of solid acid catalyst obtained in step (1) and 4 mL of deionized water into a 20 mL vial, seal with the vial cap, and stir in an oil bath...

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Abstract

The invention discloses a solid acid catalyst containing a catalytic active group and an adsorption group and preparation and application of the solid acid catalyst, which belong to the field of hydrolyzing cellulose to prepare a high-value-added platform chemical compound. The preparation method comprises the following steps of: under the protection of nitrogen, incompletely carbonizing sucralose for 0.5-20 hours at 300-500 DEG.C, adding concentrated sulphuric acid to the sucralose, performing sulfonation reaction on the sucralose for 1-20 hours at 100-200 DEG.C, adding a reaction mixture in water to separate a solid, washing the solid to be neutral by water, and drying the solid to obtain the solid acid catalyst containing the catalytic active group and the adsorption group. The solid acid catalyst is used for hydrolyzing cellose and / or cellulose, is environment-friendly, is high in activity, high in selectivity, easy to recycle and non-corrosive to devices, can be used for efficiently catalyzing crystal fibers, regenerated fibers pre-treated through ionic liquid and ball-milled cellulose, and is suitable for large-scale production. The preparation method is simple in process and low in energy consumption and needs short preparation time.

Description

technical field [0001] The invention belongs to the field of producing high value-added compounds by hydrolysis of cellulose, and relates to a solid acid catalyst containing catalytically active groups and adsorption groups and its preparation and application. Background technique [0002] Biofuels are the planet's only sustainable source of organic carbon and are considered an ideal feedstock to replace petroleum in the manufacture of fuels, chemicals and carbon-based materials. However, rising food prices in 2007 and 2008 due to the use of biofuels such as starch, sugar and vegetable oils led to a conflict between food and fuel. So people turned to the development and utilization of lignocellulose, a cheaper and more abundant inedible biofuel, to avoid threatening food security. [0003] Cellulose is the main component of lignocellulose, a macromolecular polysaccharide composed of glucose units, insoluble in water and general organic solvents. The traditional cellulose h...

Claims

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Application Information

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IPC IPC(8): B01J27/02B01J20/20B01J20/30C13K1/02
Inventor 娄文勇宗敏华胡双岚
Owner SOUTH CHINA UNIV OF TECH
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