Hydrocracking catalyst for diesel and jet fuel production and preparation method thereof
A technology for jet fuel and hydrocracking, which is applied in catalyst activation/preparation, physical/chemical process catalysts, molecular sieve catalysts, etc. It can solve the problems of low crystallization retention of small-grain Y-type molecular sieves, difficulty in realization, and high preparation costs. Achieve the effects of excellent product selectivity, improved acidity and acid distribution, and high activity
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preparation example Construction
[0028] Preparation of NaY molecular sieve directing agent: 6.00g sodium hydroxide (96wt% NaOH, technical grade), 1.24g sodium metaaluminate (41.0wt% Al) 2 O 3 , industrial grade), 18.75g distilled water, 15.00g silica sol (30wt% SiO 2 , industrial grade), mix evenly, ultrasonically shake for 1 h, and stir at 30 °C for 20 h to obtain a guiding agent, which is ready for use.
[0029] Preparation of modified Y-type molecular sieve (MNY-1): 1) 1.12g sodium hydroxide (96wt% NaOH, technical grade), 2.49g sodium metaaluminate (41.0wt% Al) 2 O 3 , industrial grade), 25.67g distilled water, 16.80g silica sol (30wt% SiO 2 , industrial grade) at 30 ° C and mix evenly, then slowly drop 1.84g of the directing agent into it, mix well, stir for 4h, and then add 0.74g of tetradecyldimethylbenzyl ammonium chloride (50wt% TDBAC, Industrial grade) was added dropwise and stirred for 1 hour to obtain a viscous aluminosilicate gel; the gel was put into the reaction kettle and crystallized at 80...
Embodiment 1
[0036] Weigh 2g MNY-1, 40g amorphous silica-alumina, 35g macroporous alumina, 23g small pore alumina, and 1g succulent powder additive in a kneader for dry mixing for 10min, and then add a certain amount of 3% nitric acid solution, Continue kneading for 30min; transfer the kneaded material to the extruder for extrusion molding; dry the extruded carrier for 20h, then calcinate at 500°C for 4h in an air atmosphere and cool to room temperature to obtain carrier a-1.
[0037] Weigh 20 g of carrier a-1 and immerse it in 40 mL of Ni-W immersion solution at room temperature for supersaturated immersion for 6 hours, filter and stand for 2 hours, then dry for 2 hours, and finally calcinate at 450 °C for 4 hours in an air atmosphere and then cool to room temperature to obtain a hydrogenation catalyst. A-1.
Embodiment 2
[0039] Weigh 5g MNY-1, 40g amorphous silica-alumina, 30g macroporous alumina, 25g small pore alumina, and 1g succulent powder in a kneader for dry mixing for 10min, then add a certain amount of 3% nitric acid solution, and continue to knead 30min; transfer the uniformly kneaded material to the extruder for extrusion molding; dry the extruded carrier for 20h, then calcinate at 500°C for 4h in an air atmosphere and cool to room temperature to obtain carrier a-2.
[0040] Weigh 20g of carrier a-2 and immerse it in 40mL Ni-W immersion solution at room temperature for supersaturated immersion for 6h, filter and stand for 2h, then dry for 2h, and finally calcinate at 450°C for 4h in an air atmosphere and then cool to room temperature to obtain a hydrogenation catalyst A-2.
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Abstract
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