Method for preparing 5-hydroxymethylfurfural through fructose dehydration catalyzing

A technology of hydroxymethyl furfural and fructose, applied in the field of preparing 5-hydroxymethyl furfural, can solve problems such as unreported, and achieve the effects of low cost, high activity and selectivity, easy separation, recovery and reuse

Active Publication Date: 2017-04-26
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The boron-cerium composite solid oxide material involved in the present invention exhibits good catalytic activity in the reaction of catalyzing the dehydration of fructose to prepare 5-hydroxymethylfurfural, and no research on this aspect has been reported

Method used

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  • Method for preparing 5-hydroxymethylfurfural through fructose dehydration catalyzing

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Experimental program
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Effect test

Embodiment 1

[0025] Embodiment 1 Material A1 (B 2 o 3 -CeO 2 -1:4) preparation

[0026] Mix and dissolve 18.9g of cerium nitrate hexahydrate and 0.676g of boric acid in 50mL of ethanol, stir at room temperature until completely dissolved, remove the ethanol by rotary evaporation to obtain a viscous colloidal colorless substance, and use liquid nitrogen to freeze and quickly dry to obtain a white solid substance. Then the obtained solid substance was ground evenly and placed in a roasting tube, the air flow rate was set to 50mL / min, the heating rate was 5°C / min, the temperature was raised to 450°C and kept for 4h, and finally the yellow solid substance A1 (B 2 o 3 -CeO 2 -1:4).

Embodiment 2

[0027] Embodiment 2 Material A2 (B 2 o 3 -CeO 2 -1:4) preparation

[0028] The preparation method of material A2 is the same as that of material A1, except that the final calcination temperature of the material is different. Mix and dissolve 18.9g of cerium nitrate hexahydrate and 0.68g of boric acid in 50mL of ethanol, stir at room temperature until completely dissolved, remove the ethanol by rotary evaporation to obtain a viscous colloidal colorless substance, and use liquid nitrogen to freeze and quickly dry to obtain a white solid substance. Then the obtained solid substance was ground evenly and placed in a roasting tube, the air flow rate was set to 50mL / min, the heating rate was 5°C / min, the temperature was raised to 550°C and kept for 4h, and finally the yellow solid substance A2 (B 2 o 3 -CeO 2 -1:4).

Embodiment 3

[0029] Embodiment 3 Material A3 (B 2 o 3 -CeO 2 -1:4) preparation

[0030] The preparation method of material A3 is the same as that of materials A1 and A2, except that the final firing temperature of the materials is different. Mix and dissolve 18.9g of cerium nitrate hexahydrate and 0.68g of boric acid in 50mL of ethanol, stir at room temperature until completely dissolved, remove the ethanol by rotary evaporation to obtain a viscous colloidal colorless substance, and use liquid nitrogen to freeze and quickly dry to obtain a white solid substance. Then the obtained solid substance was ground evenly and placed in a roasting tube, the air flow rate was set to 50mL / min, the heating rate was 5°C / min, the temperature was raised to 600°C and kept for 4h, and the yellow solid substance A3(B 2 o 3 -CeO 2 -1:4).

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Abstract

The invention relates to a method for preparing 5-hydroxymethylfurfural through fructose dehydration catalyzing. The method specifically comprises the steps that fructose is adopted as a raw material, a polar solvent is adopted as a reaction medium, boron-cerium compound oxide is adopted as a catalyst, reacting is carried out under mild conditions, and a high-yield target product is obtained. According to the boron-cerium compound oxide, a boron-containing compound and a cerium-containing compound are mixed and dissolved in a certain solvent, after the solvent is removed through rotary evaporation, solids are obtained through fast freeze drying, and then high-temperature roasting is carried out in air to obtain a solid oxide material. The catalyst synthesis method is simple, boron-cerium compound solid oxide is used for catalyzing fructose dehydration, 5-hydroxymethylfurfural is prepared, high activity and selectivity are shown under the mild conditions, and good application prospects are achieved.

Description

technical field [0001] The invention belongs to the field of preparing 5-hydroxymethylfurfural, and in particular relates to a method for preparing 5-hydroxymethylfurfural by catalyzing fructose dehydration, wherein a catalyst system and a reaction medium are provided. Background technique [0002] Dehydration of sugars to prepare 5-hydroxymethylfurfural is an important process in biomass conversion and utilization. 5-Hydroxymethylfurfural (HMF) is one of the platform compounds for biomass refining and an important intermediate for the synthesis of various fine chemicals and furan-based polymers, which has attracted widespread attention at home and abroad. HMF can be produced by acid-catalyzed dehydration of carbohydrates such as fructose, glucose and cellulose. Fructose is easy to obtain HMF by dehydration, but in the process of preparing HMF from fructose, there are mainly two types of side reactions. One is that the generated HMF undergoes further hydration reaction to g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D307/46
CPCC07D307/46
Inventor 王峰刘慧芳徐杰王敏王业红张晓辰张志鑫张超锋张哲
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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