Hydrogenation catalyst, preparation method thereof, and method used for preparing of o-diamino methyl cyclohexane
A hydrogenation catalyst and catalyst technology, which is applied in the preparation of amino compounds, chemical instruments and methods, and the preparation of organic compounds. problems, to achieve the effects of inhibiting the formation of deamination products and secondary amine products, facilitating large-scale preparation, and avoiding irreversible inactivation
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Embodiment 1
[0052] (1) 1%NiO-0.1%CuS / 80%Al 2 o 3 -20% Mg 2 Preparation of Si catalyst
[0053] to 80gγ-Al 2 o 3 and 20g Mg 2 Add 0.1g of CuS, 1g of citric acid, 2g of methylcellulose and 1g of turnip powder to Si, mix well, add 5.0g of deionized water and knead into a plastic block, and use an extruder to extrude the block into a clover shape , then dried at 100°C for 5h, and calcined at 260°C for 5h to obtain a semi-finished catalyst for use.
[0054] According to the content and composition of the catalyst, the semi-finished catalyst was impregnated with 3.89g Ni(NO 3 ) 3 ·6H 2 O in 100ml aqueous solution, after adsorption equilibrium, then dry at 100°C for 10h, and roast at 500°C for 6h to obtain catalyst precursor 1%NiO-0.1%CuS / 80%Al 2 o 3 -20% Mg 2 Si.
[0055] (2) Evaluation of catalyst
[0056] Catalyst evaluation was carried out by a continuous fixed-bed process. Before using the catalyst, it was reduced for 6 h at 300° C. in a hydrogen stream (at normal pressure). ...
Embodiment 2
[0085] (1) 5%NiO-5%CuS / 82%Al 2 o 3 -18% Mg 2 Preparation of Si catalyst
[0086] to 82gγ-Al 2 o 3 and 18g Mg 2 Add 5g CuS, 2g citric acid, 1.5g methylcellulose and 1.5g safflower powder to Si, mix evenly, add 6g deionized water and knead it into a plastic block, and use an extruder to extrude the block into a clover shape , then dried at 80°C for 6h, and calcined at 300°C for 4h to obtain a semi-finished catalyst for use.
[0087] According to the content and composition of the catalyst, the semi-finished catalyst was impregnated with 19.47g Ni(NO 3 ) 3 ·6H 2 O in 100ml aqueous solution, after adsorption equilibrium, then dry at 115°C for 9h, and roast at 450°C for 7h to obtain the catalyst precursor 5%NiO-5%CuS / 82%Al 2 o 3 -18% Mg 2 Si.
[0088] (2) Evaluation of catalyst
[0089] Catalyst evaluation was carried out by a continuous fixed-bed process. Before using the catalyst, it was reduced for 12 hours at 200° C. in a hydrogen stream (at normal pressure). The...
Embodiment 3
[0091] (1) 8%NiO-0.5%CuS / 84%Al 2 o 3 -16%Mg 2 Preparation of Si catalyst
[0092] to 84gγ-Al 2 o 3 and 16g Mg 2 Add 0.5g of CuS, 3g of citric acid, 1g of methylcellulose and 2g of turnip powder to Si, mix evenly, add 7g of deionized water and knead into a plastic block, and extrude the block into a clover shape with an extruder. Then it was dried at 90°C for 4 hours and calcined at 240°C for 6 hours to obtain a semi-finished catalyst for use.
[0093] According to the content and composition of the catalyst, the semi-finished catalyst was impregnated with 31.15g Ni(NO 3 ) 3 ·6H 2 O in 100ml aqueous solution, after adsorption equilibrium, then dry at 120°C for 8h, and roast at 400°C for 8h to obtain catalyst precursor 8%NiO-0.5%CuS / 84%Al 2 o 3 -16%Mg 2 Si.
[0094] (2) Evaluation of catalyst
[0095] Catalyst evaluation was carried out by a continuous fixed-bed process. Before using the catalyst, it was reduced for 10 h at 350° C. in a hydrogen stream (at normal p...
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