A hydrogenation protecting agent and preparation method thereof
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Embodiment 1
[0050] The preparation of embodiment 1 catalyst carrier
[0051] (1) Preparation of carrier A-1
[0052] Alumina-silica honeycomb ceramics are taken, with a porosity of 5% and an average pore diameter of 2.5 μm. Immerse in boric acid solution, dry at 120°C for 4 hours, and bake at 600°C for 3 hours to obtain carrier A-1, which contains 2wt% boron oxide and 15wt% silicon oxide.
[0053] (2) Preparation of carrier A-2
[0054] Alumina-silica honeycomb ceramics are used, with a porosity of 30% and an average pore diameter of 1.5 μm. Immerse in boric acid solution, dry at 120°C for 4 hours, and bake at 600°C for 3 hours to obtain carrier A-2, which contains 3wt% boron oxide and 12wt% silicon oxide.
Embodiment 2
[0055] Example 2 Preparation of hydrogenation protecting agent B
[0056] Weigh 6.0 g of ammonium molybdate, 4.6 g of nickel nitrate, and 15 mL of ammonia water, and mix them with deionized water to 100 mL to obtain impregnating solution I. Measure the impregnation solution I according to the water absorption rate of 100mL / 100g and spray the impregnation carrier A-1. After spraying, the sample was put into a blast drying oven for the first low-temperature heat treatment. The conditions for the first low-temperature heat treatment were: the temperature was raised to 80°C at a rate of 3°C / min, and the temperature was kept constant for 3 hours. Dissolve 6.0 g of 2,4,6-trimercapto-s-triazine triammonium salt in 50 mL of water to obtain impregnating solution II, spray the first low-temperature heat-treated sample with impregnating solution II, and then perform the second heat treatment. Low-temperature heat treatment conditions are: at 80°C, water vapor is 50% of the total volume,...
Embodiment 3
[0057] Example 3 Preparation of hydrogenation protecting agent C
[0058] Take 4.9g of molybdenum oxide, 2g of basic nickel carbonate, 0.5mL of phosphoric acid, and 50mL of deionized water and boil for 1 hour to obtain impregnation solution I. Measure the impregnation solution I according to the water absorption rate of 100mL / 100g and spray the carrier A-2. After the spraying is completed, put the sample into the blast drying oven for the first low-temperature heat treatment. The conditions for the first low-temperature heat treatment are: raise the temperature to 80°C at a rate of 3°C / min, and hold the temperature for 3 hours to obtain the first low-temperature heat treatment. For the sample, weigh 8.3g of 2,4-dimercapto-s-triazine diammonium salt and dissolve it in 50mL of water to obtain impregnation solution II. Spray and impregnate the first low-temperature heat treatment sample with impregnation solution II, and then perform the second low-temperature heat treatment , th...
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Abstract
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