Preparation method and application of aromatic compound hydrogenation rhodium/activated carbon catalyst

Abstract

The invention provides a preparation method of an aromatic compound hydrogenation rhodium / activated carbon catalyst. The preparation method comprises the following steps: I, pretreating activated carbon; II, dissolving soluble salts of a soluble rhodium compound and an additive into a solvent so as to obtain a precursor solution; III, atomizing and dispersing the precursor solution, adding into the activated carbon, uniformly stirring so as to obtain slurry, adjusting the pH value of the slurry, filtering, and washing; IV, pulping with pure water, performing reduction treatment, and performing treatment of filtration, washing and drying in sequence, thereby obtaining the aromatic compound hydrogenation rhodium / activated carbon catalyst. The invention further provides an application method of the catalyst. The catalyst prepared by using the method consists of activated carbon and metal components loaded on the activated carbon, the metal components are rhodium and an additive, the catalyst is applicable to catalytic hydrogenation of aromatic compounds, the product yield is higher than 95%, and the catalyst is stable in property and very high in repeatability.

Description

technical field [0001] The invention belongs to the technical field of noble metal catalysts, in particular to a preparation method and application of a rhodium / activated carbon catalyst for hydrogenation of aromatic compounds. Background technique [0002] The catalytic hydrogenation of aromatic compounds is involved in the synthesis of many fine chemicals and their intermediates. Compared with compounds containing carbon-carbon double bonds, nitro groups, carbonyl groups, etc., the catalytic hydrogenation reaction of aromatic compounds is much more difficult. Common catalysts currently used, such as Raney nickel, need to be reacted under high temperature and high pressure, and the reaction activity and selectivity are poor, and there are many by-products. The supported rhodium catalyst has good activity on aromatic compounds, and can react under lower pressure and temperature conditions, especially for the catalytic hydrogenation of various aromatic compounds containing b...

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Problems solved by technology

[0003] At present, the supported rhodium catalysts for the hydrogenation of aromatic compounds are mainly nano-rhodium metal catalysts supported by activated carbon. The common problem of this type of catalyst is how to further improve the activity and selectivity of the catalyst based on the current level.

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