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Method of preparing arylamine chloride by high selective catalytic hydrogenation of chlorine substituent aromatic nitro compound

A technology for aromatic nitro and chlorinated aromatic amines, which is applied in the application field of catalytic hydrogenation to achieve the effects of simple production process and improved product purity

Inactive Publication Date: 2007-02-28
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although relevant scientific researchers have conducted a lot of research on the inhibition of dechlorination during the hydrogenation of chlorinated aromatic nitro compounds, it is believed that an ideal solution has been found so far.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Put 6g of p-chloronitrobenzene, 20mL of solvent, and 0.5g of Ru / C catalyst in a 70mL tank-type high-pressure reactor, seal it and replace the air, then fill it with 0.5MPa hydrogen, put it in an oil bath and heat it up slowly , adjust the hydrogen valve to make the system pressure reach 1MPa, and after 30 minutes, the reaction is complete. After cooling, samples are taken for capillary gas chromatography analysis, and the conversion rate of p-chloro-nitrobenzene is 100%, and the selectivity of p-chloroaniline is 100%.

Embodiment 2

[0014] Put 6g m-chloronitrobenzene, 20mL solvent, 0.5g Ru / C catalyst in a 70mL kettle-type high-pressure reactor, seal it and replace the air, then fill it with 0.5MPa hydrogen, put it in an oil bath and heat it up slowly , adjust the hydrogen valve to make the system pressure reach 1.5MPa, and after 30 minutes, the reaction is complete. After cooling, samples are taken for capillary gas chromatography analysis, the conversion rate of m-chloronitrobenzene is 100%, and the selectivity of m-chloroaniline is 100%.

Embodiment 3

[0016] Put 6g o-chloronitrobenzene, 20mL solvent, 0.5g Ru / C catalyst in a 70mL kettle-type high-pressure reactor, seal it and replace the air, then fill it with 0.5MPa hydrogen, put it in an oil bath and heat it up slowly , adjust the hydrogen valve to make the system pressure reach 1.5MPa, and after 30 minutes, the reaction is complete. After cooling, samples were taken for capillary gas chromatography analysis, and the conversion rate of o-chloronitrobenzene was 100%, and the selectivity of o-chloroaniline was 100%.

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PUM

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Abstract

The invention discloses a load-typed nanometer ruthenium / carbon catalyst, which is characterized by the following: hydrogening chloride aromatic compound based on high selective catalyst under mild condition to prepare arylamine chloride without antichlorination reaction; improving receiving rate by over 99.9%.

Description

technical field [0001] The invention belongs to the application technical field of catalytic hydrogenation, and relates to a method for preparing chlorinated aromatic amines by highly selective catalytic hydrogenation of chlorinated aromatic nitro compounds, which can be prepared by selective hydrogenation of aromatic nitro compounds under mild conditions It is a high-purity chlorinated arylamine. Background technique [0002] Chlorinated aromatic amines are important organic intermediates, widely used in industries such as dyestuffs, pharmaceuticals, pesticides and rubber additives. For example, p-chloroaniline (p-CAN) is an intermediate of azo dyes and naphthol AS-LB, and is also an intermediate for the synthesis of drugs such as Liminine and phenacetin. It can also be used as a coloring agent for the production of color film agent; m-chloroaniline (m-CAN) can be used as the chromogen of ice dyes, and can be used to make chlorpromazine, promazine phosphate, chloroquine ph...

Claims

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Application Information

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IPC IPC(8): C07C211/52C07C209/36
Inventor 吕连海郭方杜文强王越
Owner DALIAN UNIV OF TECH
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