Bifunctional catalyst for catalyzing fructose to directly prepare 2,5-dimethylfuran in one step

Abstract

The invention discloses a bifunctional catalyst for catalyzing fructose to directly prepare 2,5-dimethylfuran. The bifunctional catalyst is carbon-based solid acid wrapped non-noble metal core-shell type catalyst, wherein carbon-based solid acid is carbon-based p-toluenesulfonic acid, carbon-based heteropoly acid, carbon-based niobic acid or carbon-based sulfonic acid, and non-noble metal is at least one of Cu, Co, Ni, Mn, Mo, Fe and Zn. The preparation method firstly adopts a Pechini sol-gel method to prepare a carbon-coated non-noble metal core precursor; the precursor is pyrolyzed at 400-800 Celsius system in an inert atmosphere to obtain a carbon-coated non-noble metal core, then impregnated with solid acid, and dried to obtain the carbon-based solid acid wrapped non-noble metal core-shell catalyst. The catalyst disclosed by the invention has low cost, the preparation method is simple , and one-step high yield preparation of 2,5-dimethylfuran can be realized through catalyzing fluctose without purification of an intermediate 5-hydroxymethyl furfural; the highest yield of 2,5-dimethylfuran is 71.1%; the operation is simple and safe, and the prospect of industrial application isgood.

Description

technical field [0001] The invention belongs to the technical field of clean and green catalytic synthesis of high value-added chemicals using biomass resources, and specifically relates to a bifunctional catalyst for directly preparing 2,5-dimethylfuran from fructose and its catalytic synthesis of 2,5-di Methylfuran method. Background technique [0002] With the increasing scarcity of petrochemical resources and a series of environmental problems brought about by the use process, people are forced to seek to replace petrochemical resources with renewable resources as raw materials to produce liquid fuels and basic chemicals. Biomass is a renewable resource with a wide range of sources. Using it as a raw material to prepare liquid fuels and basic chemicals meets the requirements of sustainable development. It can not only free humans from dependence on petrochemical resources, but also achieve CO 2 A virtuous circle can reduce environmental problems such as the greenhouse e...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of many reaction steps, complicated operation, high energy consumption and high catalyst cost in the prior art for preparing 2,5-dimethylfuran, and provide a simple, low-cost, high-efficiency catalytic one-step fructose 2 , Bifunctional catalyst for 5-dimethylfuran

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