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Preparation of glycosyl microsphere catalyst and process for hydrolyzing cellulose

A technology of sugar-based carbon microspheres and catalytic hydrolysis, which is applied in the production, application, and sugar production of sugar, and can solve the problems of liquid mineral acid environmental pollution, equipment corrosion yield, and high cost of enzyme preparations. Short, energy-saving, easy-to-handle effects

Inactive Publication Date: 2012-06-13
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of high cost and long reaction time of enzyme preparation used in the existing cellulose hydrolysis process, and the problems of environmental pollution, serious equipment corrosion and low yield when using liquid mineral acid

Method used

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  • Preparation of glycosyl microsphere catalyst and process for hydrolyzing cellulose
  • Preparation of glycosyl microsphere catalyst and process for hydrolyzing cellulose

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1, preparation and characterization of the invented catalyst:

[0026] The preparation process of the carbon microsphere solid acid catalyst is summarized as follows: 20 g of glucose, 20 g of salicylic acid sulfonate solution (20%) and 50 ml of distilled water were successively added under magnetic stirring, and the stirring was continued for 30 min. Then the mixed solution was transferred into a 100ml stainless steel autoclave lined with polytetrafluoroethylene, sealed and heated to a constant temperature of 180°C for 4 hours, and stirred at a speed of 1000 rpm. After the reaction, the reactor was cooled to room temperature. The resulting black powder was alternately washed several times with distilled water and ethanol (ten times in total, 6 times with water and 4 times with alcohol), and dried at a constant temperature of 80°C for 12 hours to remove all moisture. Afterwards, the dried black powder was ground, soaked in concentrated sulfuric acid for 12 ho...

Embodiment 2

[0027] Embodiment 2, preparation and characterization of the invented catalyst:

[0028] The preparation process of the carbon microsphere solid acid catalyst is summarized as follows: 20 g of sucrose, 20 g of salicylic acid sulfonate solution (20%) and 50 ml of distilled water were successively added under magnetic stirring, and the stirring was continued for 30 min. Then the mixed solution was transferred into a 100ml stainless steel autoclave lined with polytetrafluoroethylene, sealed and heated to 200°C at a constant temperature for 2h, and stirred at a speed of 1000 rpm. After the reaction, the reactor was cooled to room temperature. The resulting black powder was alternately washed several times with distilled water and ethanol (ten times in total, 6 times with water and 4 times with alcohol), and dried at a constant temperature of 80°C for 12 hours to remove all moisture. Afterwards, the black powder after drying was ground, added concentrated sulfuric acid to soak for...

Embodiment 3

[0029] Embodiment 3, the new catalytic process of cellulose hydrolysis:

[0030]Add 0.05g of cellulose and 1g of 1-butyl 3-methylimidazolium chloride salt ionic liquid into the 10ml reactor, dissolve the cellulose at 80°C, then add 0.01g of water and 0.05g of the catalyst synthesized in the present invention, Heat to 150 DEG C in a sealed state, react for 10 minutes, and then rapidly cool in an ice-water bath; take out the reaction solution and dilute it, and measure the yield of reducing sugar by 3,5-dinitrosalicylic acid method (DNS) to be 70%.

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Abstract

The invention provides a preparation of a glycosyl microsphere catalyst and a process for hydrolyzing cellulose, belonging to the field of conversion and utilization of a biomass resource and energy resources. The glycosyl microsphere catalyst provided by the invention has a molecular formula of CH0.61O0.57S0.05. The preparation conditions of the catalyst is relatively moderate and the catalyst has a very high catalytic activity; the yield of reducing sugar obtained by hydrolyzing the cellulose in a novel green solvent ion solution is high, and the temperature for the reaction is low and the reaction time is short. Compared with a liquid acid, the reaction process has no pollution and no corrosion, and the catalyst can be circularly utilized for a plurality of times. The process for hydrolyzing the cellulose is a green and effective process. Saccharides for preparing the catalyst are obtained from the natural world and have the advantages of reproducibility, no damages to human health and environment, cheap price and easiness in obtaining. The hydrolysate reducing sugar can be further converted into important platform compounds such as ethanol, 5-hydroxymethylfurfural and the like, and compounds such as bio-fuel and the like, which are capable of replacing traditional petrochemical resources.

Description

【Technical field】: [0001] The invention belongs to the field of transformation and utilization of biomass resources and energy, and in particular relates to the preparation of carbon microsphere solid acid catalysts by using biomass-based sugars as raw materials by a mild hydrothermal method and its application field. 【Background technique】: [0002] With the continuous development of the global economy, human consumption of energy continues to grow rapidly. Traditional fossil fuels such as coal, oil and natural gas are the main sources of energy and chemical raw materials at this stage, and their resource reserves are decreasing, which greatly affects and Threats to human survival and development. Therefore, the development of clean and renewable energy has become an urgent need to realize the sustainable development of human beings. Biomass is currently the only renewable energy that can fix carbon on the earth. The effective conversion process of biomass can provide both...

Claims

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Application Information

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IPC IPC(8): B01J27/02C13K1/02
Inventor 漆新华郭海心
Owner NANKAI UNIV
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