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Catalyst for preparing n-(1,4-dimethylpentyl)-p-phenylenediamine, its preparation method and n-(1,4-dimethylpentyl)-p-phenylenediamine preparation method

A technology of dimethylpentyl and p-phenylenediamine, which is applied in the field of preparation of N--p-phenylenediamine, can solve the problems such as complex synthetic methods of p-phenylenediamine, and achieve easy operation, high purity and conversion rate, React Simple Effects

Active Publication Date: 2019-07-05
JIANGSU SINORGCHEM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to provide a catalyst for preparing N-(1,4-dimethylpentyl)-p-phenylenediamine, its preparation method and N-(1,4-dimethylpentyl)-p-phenylenediamine The preparation method of phenylenediamine, to solve the complex problem of N-(1,4-dimethylpentyl)-p-phenylenediamine synthesis method in the prior art

Method used

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  • Catalyst for preparing n-(1,4-dimethylpentyl)-p-phenylenediamine, its preparation method and n-(1,4-dimethylpentyl)-p-phenylenediamine preparation method

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preparation example Construction

[0030] In addition, the present invention also provides a method for preparing a catalyst for preparing N-(1,4-dimethylpentyl)-p-phenylenediamine, which includes: impregnating the active component with a soluble salt solution, roasting supported on the catalyst carrier to form a catalyst. The catalyst prepared by the method has high dispersibility of the active component in the catalyst carrier, which is beneficial to improving the conversion rate of p-phenylenediamine.

[0031] In a preferred embodiment, the above preparation method includes the following steps: S1, impregnating the catalyst carrier in a mixed solution containing soluble salts of copper, nickel, chromium, palladium and zinc, and then filtering to obtain the first filtrate ; S2, roasting the first filtrate to obtain a catalyst.

[0032] The catalyst carrier is placed in a mixed solution formed by soluble salts of copper, nickel, chromium, palladium and zinc, and these soluble salts can be adsorbed on the cata...

Embodiment 1

[0048] Preparation of catalyst:

[0049] After the alumina and activated carbon were washed with methanol three times, they were dried in a vacuum of 0.05 MPa and 80°C for 5 hours, and were ground into particles with a particle size of 600 mesh. Cu(NO 3 ) 2 , Zn(NO 3 ) 2 , Cr(NO 3 ) 3 、NiNO 3 and PdCl 2 Dissolve in water to obtain a mixed solution; then place the above-mentioned mixture of alumina and activated carbon as a catalyst carrier in the mixed solution, mix and stir for 1 hour, and then let stand for 8 hours. After the impregnation, filter, wash the first filtrate with water for 3 times, and dry at 0.05 MPa and 80° C. for 10 h to constant weight. Continue to raise the temperature to 800° C., and after calcining for 4 hours under nitrogen atmosphere, the catalyst is obtained. The composition of this catalyst is as follows (by weight percentage, unit is %):

[0050] CuO Ni 2 o 3

ZnO Cr 2 o 3

PdCl 2

al 2 o 3

activated ...

Embodiment 2

[0056] Preparation of catalyst:

[0057] After the alumina and activated carbon were washed with methanol three times, they were dried in a vacuum of 0.05 MPa and 80°C for 5 hours, and were ground into particles with a particle size of 600 mesh. Cu(NO 3 ) 2 , Zn(NO 3 ) 2 , Cr(NO 3 ) 3 、NiNO 3 and PdCl 2 Dissolve in water to obtain a mixed solution; then place the above-mentioned mixture of alumina and activated carbon as a catalyst carrier in the mixed solution, mix and stir for 1 hour, and then let stand for 8 hours. After the impregnation, filter, wash the first filtrate with water for 3 times, and dry at 0.05 MPa and 80° C. for 10 h to constant weight. Continue to raise the temperature to 800° C., and after calcining for 4 hours under nitrogen atmosphere, the catalyst is obtained. The composition of this catalyst is as follows (by weight percentage, unit is %):

[0058] CuO Ni 2 o 3

ZnO Cr 2 o 3

PdCl 2

Al 2 o 3

activated ...

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Abstract

The invention discloses a catalyst used for preparing N-(1,4-dimethylpentyl)-p-phenylenediamine, a preparation method thereof, and a preparation method of N-(1,4-dimethylpentyl)-p-phenylenediamine. The catalyst comprises a catalyst carrier and active components comprising copper-nickel-chromium-palladium-zinc. In the above catalyst, copper-nickel-chromium-palladium-zinc are adopted as active components. During a process for preparing N-(1,4-dimethylpentyl)-p-phenylenediamine through a condensation reduction reaction and with p-phenylenediamine or p-nitroaniline and 5-methyl-2-hexanone as raw materials, the provided catalyst is used for catalyzing the condensation reduction reaction. With the catalyst, the obtained N-(1,4-dimethylpentyl)-p-phenylenediamine has relatively high purity and conversion rate. Also, the reaction is simple and is easy to operate.

Description

technical field [0001] The present invention relates to the field of chemical synthesis, in particular to a catalyst for preparing N-(1,4-dimethylpentyl)-p-phenylenediamine, its preparation method and N-(1,4-di The preparation method of methylpentyl)-p-phenylenediamine. Background technique [0002] P-phenylenediamine antiaging agent is a kind of rubber antiaging agent with excellent performance, which is widely used in tires, tapes and other industrial rubber products. In recent years, people are constantly researching and developing new rubber anti-aging agents, among which 2,4,6-tri-(N-1,4-dimethylpentyl-p-phenylenediamine)-1,3,5-triazine ( TMPPD, also known as anti-aging agent TAPDT) is one of these new rubber anti-aging agents with excellent performance. At the same time, TMPPD is also a high-quality non-polluting static and dynamic antiozonant, which can be mixed with existing rubber antioxidants 6PPD, IPPD, etc., so as to improve the flex cracking resistance of natu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/89C07C209/26C07C209/36C07C211/50
Inventor 陈新民李春生
Owner JIANGSU SINORGCHEM TECH CO LTD
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