Hydrogen peroxide hydrogenation catalyst and preparation method and application thereof

Abstract

The invention provides a hydrogen peroxide hydrogenation catalyst precursor, a hydrogen peroxide hydrogenation catalyst, and preparation methods and applications of the hydrogen peroxide hydrogenationcatalyst precursor and the hydrogen peroxide hydrogenation catalyst. The hydrogen peroxide hydrogenation catalyst precursor comprises a coating layer, the coating layer is coated on the outer surfaceof a carrier; wherein the coating layer is at least formed by a metal organic ligand compound, the metal organic ligand compound comprises the following raw materials: an active metal salt, an auxiliary agent metal salt and an organic ligand, and the organic ligand is selected from at least one of 4, 4'-diamino-2, 2'-dipyridyl and 5, 5'-diamino-2, 2'-dipyridyl. The hydrogen peroxide hydrogenationcatalyst prepared from the hydrogen peroxide hydrogenation catalyst precursor is uniform in active metal distribution and high in dispersity, has the characteristics of high hydrogenation efficiency,high selectivity and the like in the process of preparing hydrogen peroxide, and is suitable for wide application.

Description

technical field [0001] The invention relates to the field of chemical industry. Specifically, the present invention relates to a hydrogen peroxide hydrogenation catalyst precursor, a hydrogen peroxide hydrogenation catalyst and a preparation method and application thereof. Background technique [0002] Hydrogen peroxide is an important green and environmentally friendly chemical product, because its decomposition products are water and oxygen during use, and will not produce secondary pollutants, and the oxidation process using it as an oxidant has the advantages of mild reaction conditions and high selectivity. Therefore, it is widely used in chemical industry, metallurgy, papermaking, electronics, food, environmental protection and other fields. In recent years, with some new applications of hydrogen peroxide and from the perspective of environmental protection, the demand for hydrogen peroxide will increase day by day, which will promote the continuous growth of hydrogen...

AI Technical Summary

Problems solved by technology

However, the impregnation method has the following disadvantages: first, the active metal load is not uniform, the dispersion is low, and agglomeration is easy to occur in the reaction stage, resulting in reduced catalyst activity, conversion rate (hydrogenation efficiency), and reduced life; Too strong acidity is not conducive to the activation of palladium on anthraquinone molecules, and is not conducive to the generation of hydroanthraquinone, resulting in low hydrogenation efficiency; third, the depth of active metal loading is uncontrollable, because the loading is impregnated by the capillary itself. Deep impregnation, that is, the loading depth is uncontrollable, which is not conducive to the desorption of hydrogen and leads to deep hydrogenation, resulting in the increase of invalid anthraquinone degradation products and the decrease of effective anthraquinone, resulting in a decrease in selectivity

[0004]Therefore, hydrogen peroxide hydrogenation catalysts and their preparation methods are still to be studied

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