Amorphous alloy catalyst for hydrogenating dinitrotoluene and application of amorphous alloy catalyst
A technology of dinitrotoluene and amorphous alloys, which is applied in the field of preparation of supported Ni-B amorphous alloy hydrogenation catalysts, can solve problems affecting catalyst hydrogenation performance, achieve low price, strong interaction, The effect of good hydrogenation performance
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[0034] Example 1
[0035] (1) The concentration of 20ml is 0.6mol / L Ni(CH 3 COO) 2 ·4H 2 The aqueous solution of O was added dropwise to 40 ml of ethanol solution with a concentration of 1.5 mol / L tetraethyl orthosilicate, and 1 ml of acetic acid was added at the same time. The mixed solution was placed in a water bath at 60° C. and slowly stirred until it gelled.
[0036] (2) Dry the gel in an oven at 110℃ for 11h, then grind the gel to below 200 mesh, and then calcinate in a muffle furnace at 500℃ for 5h to obtain NiO / SiO 2 Forebody.
[0037] (3) Put 1mol / L KBH in an ice water bath 4 Solution, pass the 2.0mol / L NaOH solution to KBH 4 Adjust the pH of the solution to 7, press KBH 4 / Ni=4 (molar ratio), added dropwise to the calcined NiO / SiO at a rate of 3ml / min 2 After the dripping is completed, continue to stir until no bubbles are generated. First wash with distilled water to neutrality, and then wash with ethanol 5 times. The obtained composition is Ni-13.7wt%, B-15.5wt%, SiO 2 -7...
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[0040] Example 2
[0041] (1) Change 15ml concentration to 1mol / L NiCl 2 The aqueous solution was added dropwise to 80ml of ethanol solution with a concentration of 1.3mol / L tetraethyl orthosilicate, and 2ml of acetic acid was added at the same time. The mixed solution was placed in a 60°C water bath and slowly stirred until it gelled.
[0042] (2) Dry the gel in an oven at 110°C for 9 hours, then grind the gel to below 200 mesh, and then calcinate in a muffle furnace at 550°C for 6 hours to obtain NiO / SiO 2 Forebody.
[0043] (3) Put 1.2mol / L KBH in an ice water bath 4 Solution, pass the 2.0mol / L NaOH solution to KBH 4 Adjust the pH of the solution to 7, press KBH 4 / Ni=4 (molar ratio), added dropwise to the calcined NiO / SiO at a rate of 4ml / min 2 After the dripping is completed, continue to stir until no bubbles are generated. First wash with distilled water to neutrality, and then wash with ethanol for 3 times. The composition obtained is Ni-10.2wt%, B-11.5wt%, SiO 2 -78.3wt% of th...
Example Embodiment
[0045] Example 3
[0046] (1) Set the concentration of 10ml to 0.7mol / L Ni(NO 3 ) 2 The aqueous solution was added dropwise to 70ml of ethanol solution with a concentration of 1.3mol / L tetraethyl orthosilicate, and 3ml of acetic acid was added at the same time. The mixed solution was placed in a 60°C water bath and slowly stirred until it gelled.
[0047] (2) Dry the gel in an oven at 110°C for 15h, then grind the gel to below 200 mesh, then calcinate in a muffle furnace at 450°C for 7h to obtain NiO / SiO 2 Forebody.
[0048] (3) Put 1.2mol / L KBH in an ice water bath 4 Solution, pass the 2.0mol / L NaOH solution to KBH 4 Adjust the pH of the solution to 7, press KBH 4 / Ni=3 (molar ratio), added dropwise to the calcined NiO / SiO at a rate of 4ml / min 2 After the dripping is completed, continue to stir until no bubbles are generated. First wash with distilled water to neutrality, then wash with ethanol 4 times and then 3 times with ethanol. The obtained composition is Ni-5.2wt%, B-5.7wt %, ...
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