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Method for preparing furfural compounds from biomass

A technology of biomass and compounds, applied in the direction of organic chemistry, etc., can solve the problems of catalysts that cannot be recycled and reused, high requirements for reaction equipment, and high cost, and achieve the effects of low cost, low equipment corrosion, and improved service life

Active Publication Date: 2013-08-14
EAST CHINA UNIV OF SCI & TECH
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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 provide a simple and direct catalytic conversion of biomass and its derivatives into furfural and 5-hydroxymethylfurfural. Disadvantages such as high energy consumption, high requirements for reaction equipment, and catalysts that cannot be recycled and reused

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-8

[0017] Catalyst preparation by ion exchange method: Weigh a certain mass of molecular sieve or clay minerals and metal chlorides, nitrates, acetates or bromides, and then add them to a beaker containing 300mL of water, and carry out ion exchange at a specific temperature After a period of time, the catalyst in the beaker was taken out, filtered and washed, and dried overnight at a temperature of 100°C.

[0018] In eight reactors of the same type, 10 mL of an aqueous solution of methyl isobutyl ketone and saturated potassium chloride with a volume ratio of 7: 3 was added, then 0.5 g of glucose was added, and 0.1 g of the catalysts of Examples 1-8 were added respectively. , tighten the screws of the reactor, fill with nitrogen protective gas, place in eight different heating mantles respectively, raise the heating mantles to 160°C, keep the temperature constant, stir, and stop the reaction after 3 hours of reaction. The reaction system was cooled to room temperature, and the cat...

Embodiment 9-17

[0022] In nine reactors of the same type, add 10 mL of saturated aqueous solution of methyl isobutyl ketone and different inorganic salts with a volume ratio of 7:3, then add 0.5 g of glucose and 0.1 g of the catalyst of Example 5 respectively, and tighten the reaction The screw of the device was filled with nitrogen protective gas, and placed in nine different heating mantles respectively, and the heating mantles were respectively raised to 160 ° C, kept at constant temperature, stirred, and the reaction was stopped after 3 hours of reaction. The reaction system was cooled to room temperature, and the catalyst was separated by centrifugation. The reaction solution was detected by high performance liquid chromatography, and the results obtained from the reaction under different saturated inorganic salt solutions are shown in Table 2.

[0023] The yield of 5-hydroxymethylfurfural under different saturated inorganic salt solutions of table 2

[0024] Example serial num...

Embodiment 18-27

[0026]In ten reactors of the same model, add different organic solvents and saturated potassium chloride solution with a volume ratio of 7:3, then add 0.5g of glucose and 0.1g of the catalyst of Example 5 respectively, tighten the screws of the reactors, and be full of nitrogen Protective gas was placed in ten different heating mantles respectively, and the heating mantles were raised to 160° C., kept at constant temperature, stirred, and reacted for 3 hours to stop the reaction. The reaction system was cooled to room temperature, and the catalyst was separated by centrifugation. The reaction solution was detected by high-performance liquid chromatography, and the results obtained in different organic solvents are shown in Table 3.

[0027] The yield of 5-hydroxymethylfurfural under different organic solvents of table 3

[0028] Example serial number

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Abstract

The invention relates to a method for preparing furfural compounds from biomass. The method specifically comprises the preparation of a solid acid catalyst and a reaction process of the solid acid catalyst. The method disclosed by the invention can also be applied to biomass derivatives. The method comprises the steps of adding biomass or biomass derivatives and the solid acid catalyst to a reactor, filling with protective gas, and adopting an organic solvent / saturated inorganic salt aqueous-solution two-phase reaction system, thereby obtaining furfural and 5-hydroxymethylfurfural in a high yield manner under mild conditions. The method has the advantages that after the reaction is completed, the produced furfural and 5-hydroxymethylfurfural are efficiently extracted into an upper-layer organic phase, the solid acid catalyst and an unreacted substrate are retained in a bottom-layer water phase, the furfural, the 5-hydroxymethylfurfural or a mixture of the furfural and the 5-hydroxymethylfurfural can be obtained through simple separation, and fine chemicals and liquid fuels can be prepared in a manner that the furfural, the 5-hydroxymethylfurfural or the mixture of the furfural and the 5-hydroxymethylfurfural serves as a reaction intermediate; and the used catalyst is pollution-free and can be recovered and reused, so that the method has good industrial application prospects.

Description

technical field [0001] The invention belongs to the fields of catalytic chemistry, organic chemistry and industrial fine chemical synthesis, and particularly relates to a solid acid catalyst and a reaction process for preparing furfural compounds from biomass, and more specifically relates to a catalyst for preparing furfural from biomass Catalyst and reaction process with 5-hydroxymethylfurfural. Background technique [0002] Today, fossil fuels such as coal, oil and natural gas are still the most important fuel sources worldwide. But fossil fuels are one-time non-renewable energy, and it is predicted that fossil fuels will be exhausted in the next century. Because of a series of advantages such as sustainability, cleanliness, wide range of sources, and safety, the research on the production of energy and fine chemicals from biomass resources has become a hot issue in the field of energy research. In this series of studies, the sugar dehydration reaction is one of the imp...

Claims

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Application Information

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IPC IPC(8): C07D307/48C07D307/50C07D307/46
Inventor 王艳芹王健健卢冠忠刘晓晖郭耘郭杨龙王筠松王丽詹望成
Owner EAST CHINA UNIV OF SCI & TECH
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