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

A technology for aromatic compounds and catalysts, which is applied in the preparation of organic compounds, the preparation of amino compounds, and metal/metal oxide/metal hydroxide catalysts, etc., to achieve mild conditions, reduce cost problems, and improve dispersibility.

Active Publication Date: 2019-06-14
XIAN CATALYST NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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.

Method used

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

Examples

Experimental program
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Embodiment 1

[0028] The catalyst to be prepared in this example is a rhodium / activated carbon catalyst for the hydrogenation of aromatic compounds. The catalyst is composed of activated carbon and metal components supported on the activated carbon. The particle size of the activated carbon is 200 meshes to 300 meshes. The activated carbon The specific surface area is 1200m 2 / g, the metal component is rhodium and an auxiliary agent, the average particle size of the rhodium is 20nm~50nm, and the auxiliary agent is any one or more of platinum, palladium, ruthenium, molybdenum, cobalt and nickel, The auxiliary agent specifically selected in this embodiment is cobalt, the mass percentage content of rhodium in the catalyst is 5%, and the mass percentage content of the auxiliary agent is 1%. The preparation method of rhodium / activated carbon catalyst for hydrogenation of aromatic compounds in the present embodiment comprises the following steps:

[0029] Step 1. Add 10 g of activated carbon to ...

Embodiment 2

[0034] This example is the same as Example 1, and the difference is only that: the auxiliary agent is at least two kinds of platinum, palladium, ruthenium, molybdenum, cobalt and nickel.

Embodiment 3

[0036] The catalyst to be prepared in this example is a rhodium / activated carbon catalyst for the hydrogenation of aromatic compounds. The catalyst is composed of activated carbon and metal components supported on the activated carbon. The particle size of the activated carbon is 200 meshes to 400 meshes. The activated carbon The specific surface area is 1500m 2 / g, the metal component is rhodium and an auxiliary agent, the average particle size of the rhodium is 20nm~50nm, and the auxiliary agent is any one or more of platinum, palladium, ruthenium, molybdenum, cobalt and nickel, The auxiliary agent specifically selected in this embodiment is ruthenium, the mass percentage of rhodium in the catalyst is 5%, and the mass percentage of the auxiliary agent is 0.5%. The preparation method of rhodium / activated carbon catalyst for hydrogenation of aromatic compounds in the present embodiment comprises the following steps:

[0037] Step 1. Add 10 g of activated carbon to the sodium ...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/46B01J23/89C07C51/36C07C209/72C07D211/40C07C61/09C07C61/08C07C211/36
CPCB01J23/464B01J23/8913B01J23/892C07C51/36C07C209/72C07D211/40C07C61/09C07C61/08C07C211/36
Inventor 李小虎邓明周张之翔曾永康张磊颜攀敦
Owner XIAN CATALYST NEW MATERIALS CO LTD
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