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Preparation method of solid catalyst for catalyzing glucose dehydration

A solid catalyst, glucose technology, applied in physical/chemical process catalysts, chemical instruments and methods, organic chemistry, etc., to reduce production costs, reduce environmental pollution, and facilitate reuse.

Active Publication Date: 2019-05-17
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The above-mentioned patents are all heterogeneous catalysts, and both glucose and the catalyst are solid-liquid reactions, and there are still problems of mass transfer in solid-liquid reactions

Method used

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  • Preparation method of solid catalyst for catalyzing glucose dehydration
  • Preparation method of solid catalyst for catalyzing glucose dehydration
  • Preparation method of solid catalyst for catalyzing glucose dehydration

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] First, chitosan and SBA-15 were added to water at a ratio of 1:1, and the water was slowly evaporated while stirring at 80°C to obtain solid particles; Calcined (heating rate 5°C / min, heat preservation 1h), a black solid powder was obtained. The black solid powder was soaked in 5% HF solution to remove SBA-15, then filtered, washed with deionized water for several times until hydrofluoric acid was washed, and finally dried in an oven at 80°C for 10 hours to obtain a mesoporous carbon nitrogen material. Soak the prepared carbon-nitrogen material in 5mol / L hydrochloric acid for 24 hours, filter it, wash it with deionized water several times until the excess acid is washed away, and finally dry it in an oven at 90°C for 12 hours to obtain a solid that is used to catalyze the dehydration of glucose catalyst.

[0039] Catalytic performance analysis test:

[0040] Dissolve 0.1g of glucose in 4ml of water and 8ml of methyl isobutyl ketone, then add 0.2g of solid catalyst for...

Embodiment 2

[0047] First, chitosan and SBA-15 were added to water at a ratio of 1:3, and the water was slowly evaporated while stirring at 82°C to obtain solid particles; Calcination (heating rate 2°C / min, heat preservation 1h) to obtain a black solid powder. The black solid powder was soaked in 8% HF solution to remove SBA-15, then filtered, washed with deionized water for several times until hydrofluoric acid was washed, and finally dried in an oven at 86°C for 15 hours to obtain a mesoporous carbon nitrogen material. Soak the prepared carbon-nitrogen material in 5mol / L hydrochloric acid for 26 hours, filter it, wash it with deionized water several times until the excess acid is washed away, and finally dry it in an oven at 80°C for 10 hours to obtain a solid for catalyzing the dehydration of glucose catalyst.

[0048] Catalytic performance analysis test:

[0049] Dissolve 0.1g of glucose in 4ml of water and 8ml of methyl isobutyl ketone, then add 0.2g of solid catalyst for catalyzing...

Embodiment 3

[0052] First, chitosan and SBA-15 were added to water at a ratio of 1:2, and the water was slowly evaporated while stirring at 85°C to obtain solid particles; Calcination (heating rate 6°C / min, heat preservation 1h) to obtain a black solid powder. Soak the black solid powder in 6% HF solution to remove the SBA-15 template, then filter it, wash it with deionized water several times until it is washed with hydrofluoric acid, and finally dry it in an oven at 90°C for 18 hours to obtain a mesoporous carbon nitrogen material . Soak the prepared carbon-nitrogen material in 5mol / L hydrochloric acid for 24 hours, filter it, wash it with deionized water several times until the excess acid is washed away, and finally dry it in an oven at 100°C for 12 hours to obtain a solid for catalyzing the dehydration of glucose catalyst.

[0053] Catalytic performance analysis test:

[0054] Dissolve 0.1g of glucose in 4ml of water and 8ml of methyl isobutyl ketone, then add 0.2g of solid catalys...

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Abstract

The invention belongs to the technical field of catalyst preparation, and particularly relates to a preparation method of a solid catalyst for catalyzing glucose dehydration. The preparation method comprises the steps that chitosan and SBA-15 are added into water and uniformly mixed, and the water is evaporated under the conditions of heating and stirring to obtain dry solid particles; the solid particles are calcined to obtain black solid powder; the black solid powder is soaked in a hydrogen fluoride solution, and then a mesoporous carbon-nitrogen material is obtained after filtration and drying; and the prepared mesoporous carbon-nitrogen material is soaked in an acidic solution, filtered, washed and dried to obtain the solid catalyst for catalyzing glucose dehydration. The mesoporous carbon-nitrogen material has certain alkalinity, can chemically adsorb acid at a low temperature, and can release acid to catalyze the glucose dehydration to prepare 5-HMF at a high temperature; and when the reaction is finished, the carbon-nitrogen material can further recover the acid.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, and in particular relates to a preparation method of a solid catalyst for catalyzing glucose dehydration. Background technique [0002] Biomass is considered to be the most ideal substitute for fossil resources because of its wide distribution, abundant reserves, short renewable cycle, and cheap and easy access. 5-HMF is identified as one of the top ten most valuable chemicals and is used in the synthesis of various chemicals and biofuels. Glucose is the most abundant and cheapest monosaccharide because it can be easily obtained through hemicellulose and cellulose, so the dehydration of glucose to prepare 5-HMF has aroused widespread interest. [0003] The catalysts for preparing 5-HMF from glucose dehydration are mainly divided into two categories, one is homogeneous catalyst and the other is heterogeneous catalyst. Homogeneous catalysts such as hydrochloric acid, sulfuric acid, h...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J35/02C07D307/46
Inventor 崔洪友王勇张远夏恒付强孙秀玉解玉姣
Owner SHANDONG UNIV OF TECH
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