A kind of method for preparing 2,5-furandicarboxaldehyde by dehydrogenation of 5-hydroxymethyl furfural

A technology of hydroxymethylfurfural and furandicarbaldehyde, applied in the field of 5-hydroxymethylfurfural dehydrogenation to prepare 2,5-furandicarbaldehyde, which can solve the problem of flammability and explosion of molecular oxygen, low atom utilization rate and low catalytic efficiency and other problems, to achieve the effect of high atom utilization, good application prospects, and good catalytic performance

Active Publication Date: 2022-08-05
HEBEI UNIV OF TECH
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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for the preparation of 2,5-furandicarbaldehyde by the catalytic oxidation of 5-hydroxymethylfurfural in the current method, such as molecular oxygen is flammable and explosive, the utilization rate of atoms is low, there are many by-products, and the catalytic efficiency is low. A method for preparing 2,5-furandicarbaldehyde by dehydrogenation of 5-hydroxymethylfurfural

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  • A kind of method for preparing 2,5-furandicarboxaldehyde by dehydrogenation of 5-hydroxymethyl furfural

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preparation example Construction

[0028] The preparation method of the catalyst is also the knowledge technology. The following is a specific example (but not limited to this):

[0029] In the first step, the saturated water absorption of the carrier is accurately called each carrier 1.0g on the surface dish, adding the pure water to the carrier to the wet and slightly flowing, the volume of the pure water used in the record is Essence

[0030] In the second step, the immersion legal preparation load metal catalyst: accurately referred to as the carrier 2.0G carrier in the 坩埚. Accurately weigh 0.4g Cu (NO 3 Cure 2 · 3H 2 O in the cup, add the saturated water absorption of the carrier measured in the first step, which is completely dissolved. Add the copper solution to the carrier until the carrier is completely soaked and slightly flowing. After standing for 12h, use the Maval furnace to bake the catalyst and bake it for 4h at 400 ° C. After being baked, immerse the additive NI in the same way.

[0031] The third ...

Embodiment 1

[0033] 5-hydroxymamoltalcal (5mmol), average trilum (15ml), and the reduced 6.6WT % CU / γ-Al restored 2 O 3 Catalyst (1.0g) adds a high -pressure reactor to pass N 2 The air in the reaction kettle is empty and the reaction is stopped after the mechanical stirring reaction is 12h at 150 ° C. The reaction was cooled to room temperature, the upper liquid was separated from the upper layer, the catalyst sank at the bottom, and the upper layer of clear liquid was analyzed directly on the gas chromatography. The income of formaldehyde was 36.6 %.

[0034] Among them, the product detection method: After the reaction is over, the reaction solution is separated by centrifugal solution. After the upper liquid is separated and filtered, the gas chromatography is performed.

Embodiment 2

[0036] Other steps are the same as Example 1, the difference is that the catalyst that is added is 6.6WT % CU / γ-AL. 2 O 3 The reaction result was that the conversion rate of 5-hydroxydamyle was 44.9 %, and the yield of 2,5-fuu two formaldehyde was 35.2 %.

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Abstract

The present invention is a method for preparing 2,5-furandicarbaldehyde by dehydrogenation of 5-hydroxymethylfurfural. The method includes the following steps: adding 5-hydroxymethylfurfural, styrene, a catalyst and an organic solvent into a reactor, and reacting at 100° C. to 150° C. for 5 to 24 hours under nitrogen atmosphere and mechanical stirring to obtain the product 2,5 furandicarbaldehyde; the catalyst is a supported metal catalyst, and the catalyst is composed of an active metal, a carrier and an auxiliary, and the active metal is Cu; the auxiliary is Ni; the catalyst carrier is γ ‑Al 2 O 3 , TiO 2 , CeO 2 , MgO, SiO 2 , ZrO 2 or activated carbon. The invention adopts the method of catalytic dehydrogenation, the metal catalyst has good catalytic performance, the conversion rate of 5-hydroxymethyl furfural can reach up to 58.0%, and the yield of 2,5-furandialdehyde can reach up to 40.4%.

Description

Technical field [0001] The present invention is the field of biomass transformation and preparation of chemicals. Specifically, it is a method of 5-hydroxytalumin dehydrogenation. Background technique [0002] The transformation and synthesis of the biomass-based platform molecular 5-hydroxydamyle (HMF) has become a hot spot for the research and utilization of biomass base molecules in recent years. It has received widespread attention and can be used to synthesize a variety of fine chemicals and amulet polymers. Among them, the 2,5-Fu Fu two formaldehyde (DFF) is an important product obtained from 5-hydroxydamonal bran. Because the 2,5-甲 因 因 contains aldehydes and amunes, a variety of chemical reactions can occur, such as polymerization, hydrolyzed oxidation, etc., which is an important organic compound intermediate. It is widely used in biomedicine, dyes and other fields. [0003] At present, the production method of 2,5-bearing dihydrumin is mainly catalytic oxidation method f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D307/46
CPCC07D307/46
Inventor 王延吉高璇李志会张东升杨秋生赵新强
Owner HEBEI UNIV OF TECH
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