Composite catalytic material, preparation method and application thereof in controllable preparation of dihydroxy/dimethylfuran compound

Abstract

The invention belongs to the field of biomass energy and chemical industry, and relates to a composite catalytic material, a preparation method and application thereof in the controllable preparationof dihydroxy / dimethylfuran compounds. The catalytic material comprises a carrier and an active metal supported on the carrier. The active metal is one of Cu, Ni, Co, Zn, Fe, Al or Sn; and the carrierof the catalyst is an organic phosphonic acid coordination compound of Zr or Hf. The catalyst consists of cheap and easily available non-noble metal and amorphous mesoporous metal phosphonic acid polymer carrier. Meanwhile, the catalyst also has strong carbonyl reduction ability and hydroxyl hydrogenolysis ability. By using renewable organic dihydric alcohol as a high efficiency in situ hydrogen donor and a reaction medium, the use of an external hydrogen donor and other reaction solvents is avoided. By a segmental temperature control method, carbonyl reduction ability and hydroxyl hydrogenolysis ability of the catalyst can be selectively controlled. The controllable preparation of 2,5-dihydroxy methylfuran and 2,5-dimethylfuran is realized according to actual needs.

Description

technical field [0001] The invention belongs to the field of biomass energy chemical industry, and in particular relates to a composite catalytic material, a preparation method and its application in the controllable preparation of dihydroxy / dimethylfuran compounds. Background technique [0002] With the increasingly prominent contradiction between the supply and demand of global fossil resources and the increasing environmental pollution, the use of cheap and renewable biomass resources to prepare high-value-added chemicals and high-quality liquid fuels has attracted widespread attention from many researchers at home and abroad. . 2,5-Dihydroxymethylfuran and 2,5-Dimethylfuran prepared from biomass-based 5-hydroxymethylfurfural through selective hydrogenation are a new class of symmetrical furan compounds with a wide range of uses. Among them, 2,5 dimethylol furan can be used as a monomer to synthesize polyester, polyether and crown ether materials, etc., and can also be...

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Problems solved by technology

[0003] CN105712854A discloses a method for selectively preparing 2,5-dimethylolfuran. The method uses a semi-sandwich type Ir complex as a catalyst, formic acid, formate, and hydrogen as a hydrogen source, although it can accumulate at a high yield 2,5-Dihydroxymethylfuran, but it requires a noble metal catalyst and the catalyst preparation process is relatively complicated, and formic acid is highly corrosive, and hydrogen has a great potential safety hazard

[0004] Chinese patent CN106946820A discloses a method for preparing 2,5-dimethylfuran and its etherification products from 5-hydroxymethylfurfural, and the catalyst used in the method is ZrO 2 / Beta1401, ZrO 2 / MCM-41, ZrO 2 / USY and ZnO-ZrO 2 / SBA-15 and other supported catalysts, the preparation process is more cumbersome and the preparation time is longer

[0005] Chinese patent CN108084119A discloses a method for preparing 2,5-dimethylolfuran in a low phase transfer temperature blending system. The method uses a deep eutectic solvent and sodium borohydride as a catalytic reaction system, and its composition is very complicated. Many steps

[0006] Chinese patent CN104557802A discloses a method for preparing 2,5-dimethylfuran by selective hydrodeoxygenation of 5-hydroxymethylfurfural. This method uses a supported noble metal as a catalyst, and the cost of the catalyst is high. Hydrogen is used as the hydrogen source. Poor Utilization and Security

[0007] Chinese patent CN108586392A discloses a method for preparing 2,5-dimethylfuran by in-situ hydrogenation of 5-hydroxymethylfurfural. Although the method uses cheap non-precious metal catalysts and ethanol hydrogen donors, the catalyst preparation process and catalytic The temperature of the reaction process is extremely high and the energy consumption is high

[0008] In addition, the selective synthesis process of 2,5-dimethylolfuran and 2,5-dimethylfuran generally requires different catalytic reaction systems, which are not necessarily suitable for the synthesis of 2,5-dimethylolfuran. Suitable for the synthesis of 2,5-dimethylfuran and vice versa

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