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

Abstract

The invention provides a preparation method of a rhodium / activated carbon catalyst for the hydrogenation of aromatic compounds, comprising the following steps: one, pretreating the activated carbon; two, dissolving a soluble rhodium compound and a soluble salt of an auxiliary agent in a solvent to obtain Precursor solution; 3. Atomize and disperse the precursor solution and add it to activated carbon, stir evenly to obtain a slurry, then adjust the pH value, filter and wash; 4. Perform reduction treatment after beating with pure water, and then filter and wash in sequence And dry treatment, obtain the rhodium / activated carbon catalyst for the hydrogenation of aromatic compounds. The invention also provides an application method of the catalyst. The catalyst of the present invention is composed of activated carbon and metal components loaded on the activated carbon, the metal components are rhodium and auxiliary agents, the catalyst is suitable for catalytic hydrogenation of aromatic compounds, the product yield exceeds 95%, and the catalyst performance Stable and very repeatable.

Description

technical field [0001] The invention belongs to the technical field of precious metal catalysts, and in particular relates 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 of aromatic compounds is much more difficult. Common catalysts currently used, such as Raney nickel, need to react at high temperature and high pressure, and the activity and selectivity of the reaction are poor, and there are many by-products. The supported rhodium catalyst has good activity for aromatic compounds and can be reacted under lower pressure and temperature conditions, especially for the catalytic hydrogenation of various aromatic compounds co...

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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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