Catalyst used for preparing N-(1,4-dimethylpentyl)-p-phenylenediamine, preparation method thereof, and preparation method of N-(1,4-dimethylpentyl)-p-phenylenediamine
A technology of dimethylpentyl and p-phenylenediamine, which is applied in the field of preparation of N--p-phenylenediamine, can solve problems such as the complex synthesis method of p-phenylenediamine, and achieves easy operation, simple reaction, high purity and high purity. The effect of conversion rate
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[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
activa...
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
activa...
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