A combined method of hydrogenation and catalytic cracking
A catalytic cracking and combined method technology, applied in hydrotreating process, hydrocarbon oil treatment products, treatment of hydrocarbon oil, etc., can solve the problem of reducing the processing capacity and economic benefit of catalytic cracking unit, unsatisfactory cracking effect, increasing the regenerator load, etc. problems, to achieve the effect of good product quality, low sulfur content and olefin content, and increase the saturation rate of aromatic hydrocarbons
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[0095] (1) Preparation of silica carrier:
[0096] After 3000 grams of Silica Gel 955 commercial silica gel (the product of Davison Chemical Company in the U.S., containing SiO 99.8% by weight) and 75 grams of scallop powder were mixed uniformly, then mixed with 84 milliliters of nitric acid (concentration 65-68%, analytically pure, Shantou Xilong Chemical Industry Co., Ltd. plant) and 4200 ml of water, and the mixture was kneaded evenly on a twin-screw extruder, and then extruded into a butterfly-shaped strip of ф1.3 mm. After the wet strip was dried at 120°C for 4 hours, it was roasted at 600°C for 3 hours. A silica carrier S is obtained. Adopt BETN 2 Adsorption method analysis, the specific surface area of the carrier is 180m 2 / g, the pore volume is 0.78mL / g.
[0097] (2) Preparation of aromatics deep hydrogenation saturation catalyst:
[0098]Take 200 grams of silicon oxide carrier S, impregnate with 200 milliliters of dilute ammonia solution (10% concentration) con...
Embodiment 1
[0102] use figure 1 In the process flow shown, catalytic cracking light cycle oil (LCO) passes through the first hydrogenation reactor, and successively contacts and reacts with hydrogenation protection agent A and aromatics deep hydrogenation saturation catalyst F (loading volume ratio is 4:5:40) , after the hydrogenation distillate oil of the first hydrogenation reactor is mixed with the wax oil raw material I, enter the second hydrogenation reactor and successively in the first hydrogenation reaction zone and hydrogenation protection agent B1, hydrogenation protection agent B2, hydrogenation Demetallization catalyst D (loading volume ratio: 10:10:80) contact reaction, contact reaction with hydrodesulfurization catalyst E in the second hydrogenation reaction zone, and contact reaction with hydrodesulfurization and denitrogenation catalyst H in the third hydrogenation reaction zone reaction. The liquid product enters the fractionation system for further separation to obtain ...
Embodiment 2
[0107] use figure 1 In the process flow shown, catalytic cracking heavy cycle oil (HCO) passes through the first hydrogenation reactor, and is sequentially mixed with hydrogenation protection agent A, hydrogenation protection agent B and aromatics deep hydrogenation saturation catalyst F (loading volume ratio is 2: 4:25) contact reaction, after the hydrogenated distillate oil in the first hydrogenation reactor is mixed with the wax oil raw material I, it enters the second hydrogenation reactor in turn in the first hydrogenation reaction zone and hydrogenation protection agent A, hydrogenation Protective agent B, hydrodemetallization catalyst C (filling volume ratio is 5:20:75) contact reaction, contact reaction with hydrodesulfurization catalyst E in the second hydrogenation reaction zone, and hydrogenation reaction in the third hydrogenation reaction zone H contact reaction of desulfurization and denitrogenation catalyst. The liquid product enters the fractionation system fo...
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