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Method for preparing aromatic amine, alcohol and alkane by heterogeneous catalytic hydrogen transfer

An aromatic amine, catalytic hydrogen technology, applied in the chemical industry, can solve the problems of poor selectivity, limited selectivity improvement, narrow application range, etc., and achieve the effects of environmental friendliness, good selectivity and good selectivity

Inactive Publication Date: 2008-05-21
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the application range of this method is relatively narrow. Early studies have shown that platinum, palladium, and nickel catalyzed hydrogen transfer reactions can obtain good conversion rates, but the selectivity is often not very good.
In order to improve the selectivity, mercury and lead can be added to partially poison the catalyst, but the addition of mercury and lead is too small, and the selectivity improvement is very limited; the addition of mercury and lead is large, and the selectivity is improved, but the reaction rate is low
The amount of poisoning agent is difficult to control

Method used

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  • Method for preparing aromatic amine, alcohol and alkane by heterogeneous catalytic hydrogen transfer
  • Method for preparing aromatic amine, alcohol and alkane by heterogeneous catalytic hydrogen transfer
  • Method for preparing aromatic amine, alcohol and alkane by heterogeneous catalytic hydrogen transfer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 54.8mg of nitrotoluene, 4mg of potassium carbonate, 0.05g of 1.5%wtAu / ZrO were charged into a stainless steel autoclave with a capacity of 100ml 2 Catalyst, 20ml of isopropanol, and after purging the autoclave with nitrogen, the internal temperature of the autoclave was raised to 90°C, 0.5MPa inert gas was introduced, stirred for 3h, and the temperature in the autoclave was cooled to room temperature. Then centrifuge, analyze the result with gas chromatography, the conversion rate that p-bromonitrobenzene is converted into p-bromoaniline is 99.8%, and the selectivity is 97.7%.

Embodiment 2~4

[0034] Each embodiment repeats the process of Example 1 by the contents of each component specified in Table 1. Among them, 20ml of isopropanol is used as the hydrogen donor, and 0.05g of 1.5%wt Au / ZrO is used as the catalyst 2 Reminder, pressure 0.5Mpa, not given in the table below.

[0035] The results are listed in Table 1 below.

[0036] Table 1

[0037] Example

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PUM

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Abstract

The invention belongs to the chemical industry technical field and concretely provides a method of preparing for aromatic amine, alcohol or alkane by multi-phase catalytic hydrogenation transfer. The invention considers aromatic nitryl compound, aldehyde ketone and alkene compound as a substrate, hydrogenous polyatomic molecule as a hydrogen donor and loading type nano-gold as catalyst for reflux and stirring for the multi-phase catalytic hydrogenation transfer reaction under 80 DEG C to 200 DEG C and 0.4 to 0.6MPa to prepare for the aromatic amine, alcohol or alkane. The reaction condition of the method of the invention is gentle; the environment is friendly; the applied catalyst has high reaction activity and good selectivity.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a method for preparing aromatic amines, alcohols and alkanes through nano-gold catalyzed hydrogen transfer reaction. Background technique [0002] No matter from the perspective of industrial application or laboratory research, the reduction of aromatic nitro compounds, aldehydes, ketones, and alkene compounds to corresponding amines, alcohols, and alkanes is a very important reaction. This reaction has a very broad application in fuel, pesticide, rubber and other fields. [0003] So far, hydrogenation reduction mainly uses H 2 as a reducing agent. Compared with this traditional method, hydrogen transfer hydrogenation has actual and potential advantages. It uses hydrogen-containing polyatomic molecules as hydrogen sources (called hydrogen donors, such as formic acid and its salts, hydrazine, hydrocarbons, alcohols, etc.), and hydrogen is transferred from ...

Claims

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Application Information

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IPC IPC(8): C07B35/02B01J23/52B01J23/58C07C209/36C07C29/136C07C5/03
Inventor 曹勇苏方正何林刘永梅范康年
Owner FUDAN UNIV
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