Composite nanometer structure copper catalyst for preparing furfuralcohol through furfural hydrogenation and preparation method thereof

Abstract

The invention provides a composite nanometer structure copper catalyst for preparing furfuralcohol through furfural hydrogenation. The catalyst is Cu/@-CeO2/SBA-15, Cu/@-La2O3/SBA-15 or Cu/@-Pr6O11/SBA-15. A preparation method of the catalyst comprises the following steps of firstly preparing a lanthanide metal oxide film layer by a precipitation method; coating the lanthanide metal oxide film layer onto an SBA-15 molecular sieve; performing washing filtering, drying and sintering to form composite carriers; then, preparing active ingredients elemental copper loaded onto the composite carriersby a soaking-reducing method; obtaining the composite nanometer structure copper catalyst. The weight of the lanthanide metal oxide accounts for 10 to 30 weight percent of composite carriers; the weight of the elemental copper is 8 to 12 weight percent of the total weight of the catalyst. The catalyst has the advantages that the furfural conversion rate is high; the furfuralcohol selectivity is high; the price is low; the environment is protected; the catalysis conditions are mild.

Description

technical field [0001] The invention relates to a novel composite nano-catalyst and a preparation method thereof, in particular to a composite nano-structured copper catalyst for furfural hydrogenation to prepare furfuryl alcohol and a preparation method thereof. Background technique [0002] As an important organic chemical raw material, furfuryl alcohol is widely used in the preparation of synthetic fibers and synthetic rubber, and is also an important raw material in the preparation of fuels, paints and pesticides. Today, furfuryl alcohol mainly comes from the deep processing of furfural, which is obtained through further selective hydrogenation of furfural, which is very in line with the social concept of sustainable development. Therefore, the development of an efficient, cheap and environmentally friendly catalyst has important economic value and practical significance. [0003] At present, furfural hydrogenation catalysts mostly use a single oxide carrier or a porous...

AI Technical Summary

Problems solved by technology

Because these methods are complicated to operate and the operating conditions are harsh, they are not easy to be industrialized.

Patent CN1398670A and patent CN1562477A respectively disclose a Cu-Cr catalyst containing precious metals Pt and Pd. Although these series of catalysts have good catalytic activity, they are expensive and pollute the environment.

The patent CN106732706A also discloses a furfural hydrogenation catalyst containing rare earth elements. Although this series of catalysts has high catalytic activity, the catalytic conditions are relatively harsh, that is, the temperature is 220°C and the pressure is 7Mpa, thereby improving the operating conditions and equipment. The cost, and the proportion of active copper oxide in the catalyst is as high as 70wt%, reflecting the low utilization rate of copper oxide in catalysis

[0004] Considering that in the existing furfural hydrogenation process to prepare furfuryl alcohol, the catalyst occupies a considerable cost

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