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Composite powdered catalyst adn its preparing method

A composite powder and catalyst technology, which is applied in the field of composite powder catalyst and its preparation, can solve the problems that are difficult to apply to industrial scale production, high price, and high sensitivity to catalyst poisoning, and achieve recyclable activity, simple preparation, and low price. cheap effect

Inactive Publication Date: 2004-01-28
侯金祥
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of noble metal catalyst is not only expensive, the source is scarce, but also highly sensitive to catalyst poisoning, which requires high purity of raw materials. However, some raw materials in industrial production must be recycled, and certain impurities will inevitably be brought in, which is easy to cause the catalyst to fail. Poisoning and inactivation, thereby increasing the production cost of 4-aminodiphenylamine, it is difficult to apply to industrial scale production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Take 46 grams of nickel powder, 51 grams of aluminum powder, and 3 grams of copper powder, melt them in an induction furnace, discharge, cool, and roll into powder, sieve, keep the mesh number at 100-200 mesh, and have a capacity of 500 ml In a three-necked flask equipped with a thermometer and a stirrer, put 375 grams of 20% sodium hydroxide aqueous solution into it, slowly add the mixed powder, keep the reaction temperature at 60°C, and the reaction time is 4 hours, then wash the catalyst with water to medium properties, that is, the composite powder catalyst is prepared.

Embodiment 2

[0015] Take 50 grams of nickel powder, 47 grams of aluminum powder, and 3 grams of iron powder, melt them in an induction furnace, discharge, cool, and roll into powder, sieve, keep the mesh number at 100-200 mesh, and have a capacity of 500 ml In a three-necked flask equipped with a thermometer and a stirrer, put 375 grams of 20% sodium hydroxide aqueous solution into it, slowly add the mixed powder, keep the reaction temperature at 50°C, and the reaction time is 4 hours, then wash the catalyst with water to medium properties, that is, the composite powder catalyst is prepared.

Embodiment 3

[0017] Take 46 grams of nickel powder, 51 grams of aluminum powder, and 3 grams of phosphorus powder, melt in an induction furnace, discharge, cool, and roll into powder, sieve, keep the mesh number at 100-200 mesh, and have a capacity of 500 ml In a three-necked flask equipped with a thermometer and a stirrer, put 375 grams of 20% sodium hydroxide aqueous solution into it, slowly add the mixed powder, keep the reaction temperature at 60°C, and the reaction time is 4 hours, then wash the catalyst with water to medium properties, that is, the composite powder catalyst is prepared.

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PUM

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Abstract

The invention refers to a kind of compound powder catalyst and the manufacturing method. The catalyst is made up of nickel, aluminium and other metal or nonmetal such as iron, copper, manganese, cobalt, chrome, molybdenum, boron, phosphor. The manufacturing method is: blends the nickel, aluminium and other metal or nonmetal powder and melts them, crushes into powder after cooled, then uses alkalito process them. The product has a low price, the process is simple.

Description

technical field [0001] The invention relates to a composite powder catalyst and a preparation method thereof, in particular to a composite powder catalyst for continuous hydrogenation of 4-nitrosodiphenylamine or / and 4-nitrodiphenylamine or / and their salts and its preparation method. Background technique [0002] 4-Nitrosodiphenylamine and 4-nitrodiphenylamine are intermediates for the preparation of 4-aminodiphenylamine. At present, sodium sulfide is used to reduce 4-nitrosodiphenylamine or / and 4-nitrosodiphenylamine or / and their salts to prepare (see "Technical Handbook of Fine Organic Chemicals" edited by Zhang Sigui), and this reduction method is accompanied by a large amount of The waste liquid produced is difficult to handle and brings a lot of pollution to the environment. [0003] In the method (referring to CN1307556A) of hydrogenation reduction 4-nitrosodiphenylamine or / and 4-nitrosodiphenylamine or / and their salts with hydrogen, adopt platinum (Pt), rhodium (Rh)...

Claims

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Application Information

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IPC IPC(8): B01J23/835B01J35/02C07C209/02C07C209/36C07C209/38
Inventor 茅晓晖
Owner 侯金祥
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