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Rare earth-copper catalyst for preparing o-aminoethylbenzene by hydrogenating o-nitroethylbenzene

A technology of o-nitroethylbenzene and copper catalysts, which can be used in the preparation of amino compounds, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., and can solve the problems of non-continuous production and low production efficiency

Active Publication Date: 2015-07-15
山东鲁晶化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The prior art adopts Raney Nickel (Raney Nickel) as the reactor reaction technique of catalyst, and production efficiency is low, can not produce continuously

Method used

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  • Rare earth-copper catalyst for preparing o-aminoethylbenzene by hydrogenating o-nitroethylbenzene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Mix 51.4g of copper nitrate and 21.5g of cerium nitrate, add 200ml of pure water to dissolve into a clear liquid, neutralize with 10% NaOH to pH 8-9, age at 70°C for more than 2 hours, filter, wash the filter cake with clean water to precipitate 5 The second time, the filter cake was dried at 120° C., transferred to a muffle furnace at 550° C. and baked in air for 4 hours to obtain catalyst 1.

Embodiment 2

[0012] Mix 32g of copper nitrate and 10.9g of cerium nitrate, add 350ml of pure water to dissolve into a solution, and use 10% Na 2 CO 3 Neutralize to pH8, age at about 80°C for 2 hours, filter off the clear liquid, wash the filter cake 5 times, put the coprecipitated filter cake in an oven and dry at 120°C for 4 hours, transfer to a muffle furnace for roasting at 600°C After 4 hours, Catalyst 2 was obtained.

Embodiment 3

[0014] Dissolve 64g of copper acetate in 250ml of pure water, add 15g of lanthanum chloride, stir to dissolve, neutralize with 10% NaOH to pH 8~9, age at 70°C for 2 hours, filter, wash with pure water 4 times, and bake at 120°C The filter cake was dried for 4 hours, and then calcined at 630° C. for 3 hours in an air atmosphere to obtain catalyst 3.

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Abstract

The invention relates to a rare earth-copper catalyst for preparing o-aminoethylbenzene by hydrogenating o-nitroethylbenzene. The rare earth-copper catalyst is prepared in the following steps of: carrying out coprecipitation, roasting and solid-phase reaction on rare earth element cerium-source or lanthanum-source compounds and soluble copper-source compounds to generate cerium or lanthanum, introducing the cerium or the lanthanum into CuO-structured rare earth copper composite oxides, and carrying out a hydrogen reduction to form the rare earth-copper catalyst. The rare earth-copper catalyst can be used for preparing the o-aminoethylbenzene by hydrogenating the o-nitroethylbenzene in a continuous flow static bed reaction system, the conversion percent of the o-nitroethylbenzene is equivalent to that of a kettle reaction of a raney nickel catalyst, the yield of the o-nitroethylbenzene is higher than 80%, and the selectivity of the o-nitroethylbenzene is higher than 99.9%.

Description

technical field [0001] The invention relates to a catalyst for hydrogenating o-nitroethylbenzene to prepare o-aminoethylbenzene, in particular to a rare earth-copper catalyst for hydrogenating o-nitroethylbenzene to prepare o-aminoethylbenzene. Background technique [0002] O-aminoethylbenzene (OAEB) is an important pesticide and pharmaceutical intermediate, and it is a reasonable choice to prepare it by hydrogenation of relatively cheap o-nitroethylbenzene (ONEB). The prior art adopts Raney Nickel (Raney Nickel) as the tank reaction process of catalyst, and the production efficiency is low and cannot be continuously produced. The key to the development of continuous catalytic hydrogenation green environmental protection technology lies in the catalyst, which requires high catalyst activity, good selectivity for o-aminoethylbenzene, long operating life, and low requirements for reaction temperature and pressure conditions. The present invention is exactly for this purpose. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/83C07C211/45C07C209/36
Inventor 刘希尧马殿伟刘竟宇
Owner 山东鲁晶化工科技有限公司