[0052] Alumina preparation example
[0053] Weigh 2000 grams of aluminum hydroxide powder (dry rubber powder produced by the Catalyst Plant of Changling Branch, 72% by weight on a dry basis), and extrude it into a butterfly strip with a circumscribed circle diameter of 1.3 mm with an extruder. The wet strip is kept at 120°C Drying for 4 hours, and calcining at 600°C for 3 hours to prepare carrier Z1. The radial crushing strength of the Z1 carrier is 29.5N/mm, the water absorption is 0.85ml/g, the pore volume is 0.67ml/g, and the specific surface area is 275m. 2 /g.
[0054] The hydrorefining catalyst S1 used in the examples was prepared by the following method:
[0055] Weigh 40 grams of molybdenum trioxide, 19 grams of basic cobalt carbonate, 15 grams of phosphoric acid, and 20 grams of citric acid into 140 grams of deionized water. Heat and stir to dissolve to obtain a clear impregnating solution. The measured pH is 3.5. Using the saturated impregnation method to impregnate 200 grams of alumina carrier Z1 with the above solution, the impregnation time is 2 hours, then it is dried at 120°C for 2 hours, and then it is calcined in the state of air flow, and the calcining temperature is 400°C. The time is 2 hours, relative to each gram of carrier, the air inflow rate is 2 liters/hour, and the semi-finished catalyst Z1-S1 is obtained. The carbon content of Z1-S1 is shown in Table 1. Add 5 grams of EDTA to 150 grams of deionized water and add Adjust the pH of the solution to 10.5 with proper amount of ammonia, stir to obtain a clear solution, use the saturated dipping method to impregnate Z1-S1 with the above solution for 2 hours, and then dry at 110°C for 3 hours to obtain the hydrofining catalyst S1. Based on the total amount of S1 and based on oxides, the content of hydrogenated metal active components is shown in Table 1.
[0056] The hydrorefining catalyst S2 used in the examples was prepared by the following method:
[0057] Weigh 40 grams of molybdenum trioxide, 21 grams of basic nickel carbonate, 13 grams of phosphoric acid, and 30 grams of citric acid into 140 grams of deionized water. Heat and stir to dissolve to obtain a clear impregnating solution. The measured pH is about 4.0. 200 g of carrier Z1 was impregnated with the above solution by the saturated impregnation method, the impregnation time was 2 hours, and then dried at 150°C for 2 hours, and then it was calcined in the state of air flow, the calcining temperature was 360°C, and the time was For 3 hours, relative to each gram of carrier, the air inflow rate is 10 liters/hour, and the semi-finished catalyst Z1-S2 is obtained. The carbon content of Z1-S2 is shown in Table 1. Add 30 grams of citric acid to 150 grams of deionized water and stir to obtain To clarify the solution, add appropriate amount of ammonia to adjust the pH to 10.5. Z1-S2 was impregnated with the above solution by the saturated impregnation method, and the impregnation time was 2 hours, and then dried at 150°C for 3 hours to obtain the hydrorefining catalyst S2. Based on the total amount of S2 and based on oxides, the content of hydrogenated metal active components is shown in Table 1.
[0058] The hydrorefining catalyst S3 used in the examples was prepared by the following method:
[0059] Weigh 30g of nickel nitrate, 55g of ammonium metatungstate, 10g of magnesium nitrate, 15g of phosphoric acid and 10g of diethylene glycol into 140g of deionized water, stir and dissolve to obtain a clear solution. The measured pH of the solution is 3.0. Using the saturated impregnation method to impregnate 200 grams of alumina carrier Z1 with the above solution, the impregnation time is 2 hours, and then it is dried at 120°C for 2 hours, and then it is roasted in the state of air flow, and the roasting temperature is 450°C. The time is 4 hours, relative to each gram of carrier, the air flow rate is 0.3 liters/hour, and the semi-finished catalyst Z1-S3 is obtained. The carbon content of Z1-S3 is shown in Table 1; 10 grams of ethylenediamine is put into 150 grams of deionized Stir in water to obtain a clear solution, add appropriate amount of ammonia solution to adjust the pH to 9.5. Z1-S3 was impregnated with the above solution by the saturated impregnation method for 2 hours, and then dried at 120°C for 6 hours to obtain the hydrogenation catalyst S3. Based on the total amount of S3 and based on oxides, the content of hydrogenated metal active components is shown in Table 1.
[0060] The hydrorefining catalyst in the comparative example adopts the hydrorefining catalysts D1 and D2, which are prepared by the following methods:
[0061] The hydrorefining catalyst D1 used in the comparative example was prepared by the following method:
[0062] Using the same preparation method as the hydrogenation catalyst S1, the difference is that the prepared hydrogenation catalyst S1 is calcined at 400°C for 3 hours to obtain the hydrogenation catalyst D1. The hydrogenation catalyst D1 is based on the total amount of D1. In terms of oxides, the content of hydrogenated metal active components is shown in Table 1.
[0063] The hydrorefining catalyst D2 used in the comparative example was prepared by the following method:
[0064] Weigh 30 grams of nickel nitrate, 55 grams of ammonium metatungstate, 15 grams of phosphoric acid and 10 grams of diethylene glycol into 140 grams of deionized water, stir to dissolve to obtain a clear solution, and use the saturated impregnation method to impregnate 200 grams of alumina with the above solution The carrier Z1 was immersed for 2 hours, and then dried at 120°C for 2 hours to obtain a hydrogenation catalyst D2. Based on the total amount of D2 and based on oxides, the content of hydrogenated metal active components is shown in Table 1.
[0065] Table 1 Catalyst properties
[0066]
[0067] The properties of the raw oil used in the Examples and Comparative Examples are shown in Table 2.
[0068] Table 2 Feedstock oil properties
[0069] Raw oil A Raw oil B Raw oil C Density (20℃)/g.cm -3
