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Method for preparing 5-hydroxymethylfurfural by catalyzing glucose with tin-modified molecular sieve catalyst

A technology of hydroxymethylfurfural and molecular sieves, which is applied in the direction of molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the chemical concept of green and sustainable development, poor selectivity of 5-hydroxymethylfurfural, Hazardous living environment and other problems, to achieve good industrial application prospects, good catalyst stability, high catalytic activity and selectivity effect

Active Publication Date: 2021-04-09
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, traditional solid acid catalysts only Acidic sites or weaker Lewis acidic sites are less selective for catalyzing more economical biomass-based glucose to 5-hydroxymethylfurfural
Using metals to modify solid acid catalysts such as molecular sieves can effectively adjust the acid properties of the catalysts. Among them, the chromium-modified solid catalysts show excellent catalytic performance in the conversion of glucose to 5-hydroxymethylfurfural, but the toxicity of metal chromium is relatively high. Large and easy to be lost during the reaction process, which is harmful to the living environment and does not conform to the chemical concept of green and sustainable development

Method used

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  • Method for preparing 5-hydroxymethylfurfural by catalyzing glucose with tin-modified molecular sieve catalyst
  • Method for preparing 5-hydroxymethylfurfural by catalyzing glucose with tin-modified molecular sieve catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Take 1.0g of glucose, 1.0g of SAPO-34 catalyst, 2mL of water and 18mL of tetrahydrofuran into the autoclave, then replace the air in the autoclave with nitrogen and maintain the nitrogen pressure at 3Mpa, set the stirring speed to 700rpm, at 170°C After reacting for 2 hours at a certain reaction temperature, the reactor was cooled to room temperature to obtain a reaction solution containing the target product 5-hydroxymethylfurfural. The reaction solution was filtered and separated to remove the catalyst, and the filtrate was tested and analyzed by high-performance liquid chromatography, and the calculated 5- The yield of hydroxymethylfurfural was only 20.1%.

Embodiment 2

[0022] Weigh 0.005g SnCl 4 ·5H 2 O was dissolved in an appropriate amount of deionized water, and after it was completely dissolved, weighed 1.0g SAPO-34 molecular sieve and quickly added it to the above solution, stirred and impregnated at room temperature for 4 hours, and then dried in an oven at 120°C overnight to obtain white solid particles ; Grind the solid powder to a powder state to obtain a metal tin-modified molecular sieve catalyst, in which SnCl 4 ·5H 2 The mass ratio of O to SAPO-34 was 0.005:1, so the catalyst was labeled as 0.5% Sn / SAPO-34.

[0023] Take 1.0g of glucose, 1.0g of 0.5% Sn / SAPO-34 catalyst, 2mL of water and 18mL of tetrahydrofuran into the autoclave, then replace the air in the autoclave with nitrogen and maintain the nitrogen pressure at 3Mpa, set the stirring speed at 700rpm , after reacting for 2 hours at a reaction temperature of 170°C, cool the reactor to room temperature to obtain a reaction solution containing the target product 5-hydroxy...

Embodiment 3

[0025] Weigh 0.01g SnCl 4 ·5H 2 Dissolve O in an appropriate amount of deionized water, weigh 1.0g SAPO-34 molecular sieve after it is completely dissolved, and quickly add it to the above solution, stir and impregnate at room temperature for 4 hours, and then place it in an oven at 120°C to dry overnight to obtain a white solid Particles; the solid powder is ground to a powder to obtain a metal tin-modified molecular sieve catalyst, and the SnCl in the catalyst 4 ·5H 2 The mass ratio of O to SAPO-34 is 0.01:1, so this catalyst is labeled as 1%Sn / SAPO-34.

[0026] Take 1.0g of glucose, 1.0g of 1% Sn / SAPO-34 catalyst, 2mL of water and 18mL of tetrahydrofuran into the autoclave, then replace the air in the autoclave with nitrogen and maintain the nitrogen pressure at 3Mpa, set the stirring speed at 700rpm , after reacting for 2 hours at a reaction temperature of 170°C, cool the reactor to room temperature to obtain a reaction solution containing the target product 5-hydroxyme...

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Abstract

The invention discloses a method for preparing 5-hydroxymethylfurfural by catalyzing glucose with a tin-modified molecular sieve catalyst. The method comprises the following steps: adding glucose, a tin-modified molecular sieve catalyst, water and tetrahydrofuran into a reaction container, keeping the pressure of nitrogen in the reaction container at 0.1-5MPa, keeping the reaction temperature at 140-180 DEG C, reacting for 10-180min, and cooling after the reaction is finished to obtain a reaction solution containing a target product 5-hydroxymethylfurfural. According to the method for preparing 5-hydroxymethylfurfural by catalyzing glucose with the tin-modified molecular sieve catalyst, one-step conversion from glucose to 5-hydroxymethylfurfural can be achieved, the reaction condition is mild, the stability of the catalyst is good, and therefore the method has good industrial application prospects.

Description

technical field [0001] The invention relates to the technical field of biomass catalysis, in particular to a method for preparing 5-hydroxymethylfurfural from glucose by catalyzing glucose with a tin-modified molecular sieve catalyst. Background technique [0002] With the decline of fossil resource reserves year by year, the production of bulk chemicals using fossil resources as raw materials is also facing great challenges. In order to achieve sustainable supply of energy and chemicals, it is necessary to find efficient and recyclable energy chemical production methods. Alternatives are imminent. Biomass resources widely exist on the earth's surface, are cheap, easy to obtain and renewable. Effective conversion and comprehensive utilization of biomass resources to produce petroleum-based chemicals is one of the important ways to alleviate the fossil energy crisis and achieve sustainable social development. [0003] Due to its special molecular structure, 5-hydroxymethylf...

Claims

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Application Information

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IPC IPC(8): C07D307/46B01J29/85
CPCC07D307/46B01J29/85B01J2229/186Y02P20/584
Inventor 马隆龙宋向波王晨光陈伦刚文承彦刘琪英
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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