A kind of nickel-based glucose hydrogenation catalyst and preparation method thereof

Abstract

The invention relates to a nickel-based glucose hydrogenation catalyst and a preparation method thereof. The catalyst is composed of main active components nickel and nickel oxide, additives, silicon oxide and zirconium oxide; the content of the main active component nickel is 3-40wt%, and the content of nickel oxide is 35-72%; the content of the auxiliary agent is 0.1-10wt% %; the silicon oxide content is 10-39wt%, and the rest is zirconia; wherein the auxiliary agent is one or both of cobalt and iron. The invention adopts a microwave-assisted co-precipitation method to synthesize the catalyst precursor slurry, and further crystallizes the slurry, then performs drying, roasting and reduction passivation to obtain a glucose hydrogenation catalyst. The particle size distribution of the catalyst prepared by the invention is uniform, and the average particle size is 7-15 μm. The catalyst is used for the hydrogenation reaction of glucose, has high activity, and is safe to use; the preparation method is simple in operation, good in batch preparation repeatability, and low in cost.

Description

technical field [0001] The invention belongs to the field of catalysts, and in particular relates to a novel nickel-based catalyst for hydrogenation of glucose to sorbitol and a preparation method thereof. Background technique [0002] Sorbitol, also known as sorbitol, is an important raw material for medicine, chemical industry, light industry, and food industry, and is widely used in many fields. At present, the production processes of sorbitol in the world mainly include catalytic hydrogenation, electrolytic oxidation, and fermentation. The main processes of catalytic hydrogenation include kettle-type batch hydrogenation, external circulation batch-type hydrogenation and tubular continuous hydrogenation. The kettle-type intermittent hydrogenation production process is a traditional process for producing sorbitol in my country, and it is also a production process that is currently used more. This process generally uses glucose as a raw material, and sorbitol is prepared b...

AI Technical Summary

Problems solved by technology

Using ruthenium as a catalyst is the mainstream of sorbitol hydrogenation catalysts in the world today. It is a relatively efficient catalyst, but its price is relatively expensive, which limits its use.

However, the Raney Ni catalyst has problems such as poor stability, flammability during storage, transportation and use, and large environmental pollution during the preparation process.

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