Nitrogen-carbon doped cobalt-based bimetallic catalyst, preparation method thereof and preparation method of 2, 5-dimethyl furandicarboxylate

Abstract

The invention provides a nitrogen-carbon doped cobalt-based bimetallic catalyst and a preparation method thereof. The preparation method comprises the following steps of mixing: mixing a nitrogen source compound, cobalt nitrate, a second metal element nitrate and a carbon source compound, stirring at 90-120 DEG C for more than 8 hours, filtering and drying to obtain a solid compound containing Co, a second metal element, N and C elements, and calcining: calcining the solid compound under a nitrogen condition to obtain the composite catalyst containing Co, a second metal element, N and C elements. The invention also provides a preparation method of 2, 5-dimethyl furandicarboxylate, which comprises the following steps: mixing 5-hydroxymethylfurfural, methanol and the nitrogen-carbon doped cobalt-based bimetallic catalyst, and reacting for 3-5 hours in an oxygen environment under the conditions of pressure of 0.1-0.5 MPa, temperature of 70-90 DEG C and stirring to obtain 2, 5-dimethyl furandicarboxylate. The catalyst is simple in preparation method and suitable for industrial production, and the yield of 2, 5-dimethyl furandicarboxylate can reach 96%. Under the condition that the concentration of HMF is 10 wt%, the yield of 2, 5-dimethyl furandicarboxylate is 92%.

Description

technical field [0001] The present invention relates to the synthesis field of 2,5-dimethyl furandicarboxylate, in particular to a nitrogen-carbon doped cobalt-based bimetallic catalyst, its preparation method and the production of 2,5-dimethyl furandicarboxylate using the catalyst Preparation. Background technique [0002] Converting renewable biomass resources into high value-added carbon-based chemicals is an important approach for the sustainable development of the chemical industry in the future. In recent years, 2,5-furandicarboxylic acid (FDCA) synthesized from cellulose by selective oxidation of biomass-based platform molecule 5-hydroxymethylfurfural (HMF) has received extensive attention. Bio-based FDCA has the molecular structure and chemical properties of petroleum-based terephthalic acid (PTA), and FDCA-based polyester shows significantly better gas barrier properties and mechanical properties than traditional PET, so FDCA is considered to be the most ideal prod...

AI Technical Summary

Problems solved by technology

[0008] Therefore, it is necessary to provide a simple and easy-to-scale preparation method of nitrogen-carbon-doped cobalt-based bimetallic catalysts. It only needs to select appropriate nitrogen sources, carbon sources and active metal salts to prepare high-activity catalysts by mixing, drying and calcination. The catalyst overcomes the shortcomings of the existing HMF oxidative esterification catalyst preparation method which is complicated and difficult to scale up

The Co-based bimetallic catalyst designed and synthesized in the present invention can overcome the difficulty in the scale-up preparation of the existing HMF oxidative esterification catalyst and the difficulty of requiring a large amount of alkali additives

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