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A method for preparing 2,5-dimethylfuran by catalytic hydrogenation of 5-hydroxymethylfurfural

A technology of hydroxymethylfurfural and dimethylfuran, applied in the field of catalytic hydrogenation of 5-hydroxymethylfurfural to prepare 2,5-dimethylfuran, which can solve the problems of poor stability, low selectivity, and low activity , to achieve high selectivity and simple preparation method

Active Publication Date: 2020-10-09
DALIAN UNIV
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Problems solved by technology

It can be seen from the above research that the developed transition metal catalysts have problems such as low selectivity, low activity (large dosage), poor stability, etc. , tetrahydrofuran, and high temperature pre-reduction is required before the reaction, which consumes energy and complicates the operation process, and the reduced catalyst is easily oxidized and deactivated

Method used

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  • A method for preparing 2,5-dimethylfuran by catalytic hydrogenation of 5-hydroxymethylfurfural
  • A method for preparing 2,5-dimethylfuran by catalytic hydrogenation of 5-hydroxymethylfurfural
  • A method for preparing 2,5-dimethylfuran by catalytic hydrogenation of 5-hydroxymethylfurfural

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Experimental program
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Embodiment 1-9

[0021] Co / rGO catalyzes the batch reaction of HMF to prepare DMF under different reaction conditions in Example 1-9

[0022] 1. Catalyst preparation: Co / rGO catalyst was prepared by co-precipitation method, the specific steps are:

[0023] (1) Preparation of salt solution: take Co(NO 3 ) 2 ·6H 2 O 0.3mmol was dissolved in deionized water to make 2.1mL salt solution;

[0024] (2) Preparation of carrier and test of water absorption: Graphene oxide (GO) was obtained according to Hummers method (Hummers WS, Offeman R E.Preparation of Graphitic Oxide.J Am Chem Soc 80:1339[J].Journalofthe American Chemical Society ,1958,80(6).) Prepared from graphite powder. Reduced graphene oxide (rGO) is produced by the reduction of GO. Disperse 1 g of GO in 1000 mL of deionized water, sonicate for 30 min, then transfer to a round-bottomed flask, add 25 mL of 30% ammonia water and 6 mL of 80% hydrazine hydrate, reflux at 95 °C for 3 h under magnetic stirring at 2000 rpm, then add 4 mL of 80% ...

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Abstract

The invention relates to a method for preparing DMF (2,5-dimethylfuran) from HMF (5-hydroxymethylfurfural) by catalytic hydrogenation. According to the method, a Co / rGO (cobalt and reduced graphene oxide) composite is used as a catalyst, the Co / rGO catalyst does not need reduction pretreatment, the conversion rate of HMF can reach 100% at 140-200 DEG C and under 1-2 MPa hydrogen pressure, and theyield of DMF exceeds 90%. The Co / rGO catalyst is cheaper than noble metal catalysts such as Pt and Pd, only C=O / C-O bond is dissociated, and the furan ring and C-C bond are not damaged, so that the catalyst has high selectivity to DMF, does not need pre-reduction treatment and has industrial application value.

Description

technical field [0001] The invention relates to a method for preparing 2,5-dimethylfuran (DMF) by catalytically hydrogenating 5-hydroxymethylfurfural (HMF), and specifically relates to the catalyst used in the reaction, temperature, pressure, solvent and other reaction conditions. Background technique [0002] Non-renewable fossil resources represented by coal, oil and natural gas constitute the cornerstone of fuel, chemical and material industries in the world today, and have made great contributions to the development and prosperity of human society. However, in recent years, with the continuous reduction of fossil resource reserves and the gradual increase in the price of fossil resources, as well as the increasing environmental pollution and global warming caused by the extensive use of fossil resources, it is necessary to seek a long-term dependence and gradual replacement. Renewable resources of fossil resources have become particularly important. At present, biomass,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D307/36B01J23/75
CPCB01J23/75C07D307/36
Inventor 周锦霞杨帆毛璟博尹静梅
Owner DALIAN UNIV
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