Hydrofining catalyst and preparation method thereof
A technology for hydrorefining and catalyst, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of poor dispersion of active components and catalytic denitrification activity not good and other problems, to achieve the effect of improving dispersion, improving stability, and improving desulfurization
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[0017] A first aspect of the present invention provides a method for preparing a hydrorefining catalyst, the method comprising the following steps:
[0018] (1) Mix the alumina carrier, the compound containing the co-active component and water evenly, adjust the pH value of the obtained slurry to 5-10, stir at room temperature -90°C for 0.5-24 hours, filter and dry, and dry at 550 Calcined at -800°C for 2-5 hours to obtain a composite alumina carrier;
[0019] (2) impregnating the composite alumina carrier with an active metal in an organic solvent, and drying;
[0020] (3) Calcining the product obtained in step (2) under an inert atmosphere at a temperature of 300-700° C. for a time of 0.5-5 hours to obtain a hydrorefining catalyst.
[0021] In some embodiments provided by the present invention, the step (1) is used to prepare a composite alumina support, which can be modified to improve the final performance of the prepared hydrogenation catalyst. Preferably, the specific ...
Embodiment 1
[0042] With 650g alumina (solid content 86wt%, Al 2 o 3 559g), 240mL rare earth chloride solution (rare earth oxide content 250g / L, converted to 60g rare earth oxide), 3200g deionized water, adjust the pH value of the mixture to 5.5 with dilute ammonia water, stir and age at room temperature for 2 hours, filter Afterwards, it was dried at 120° C. for 12 hours, and calcined at 750° C. for 2 hours to obtain a composite alumina carrier. The weight ratio of alumina:rare earth oxide is 1:0.11.
[0043] 339g ferric chloride, 272g ammonium molybdate are dissolved in 800g ethanol (purity 99.9%) and make dipping liquid, gained dipping liquid and above-mentioned composite alumina carrier (with respect to composite alumina carrier, the consumption of iron oxide is 10wt%, The amount of molybdenum oxide is 20wt%) and mixed evenly (the solid-to-liquid weight ratio of composite alumina carrier: organic solvent is 1:2), kept at room temperature for 12h, and then the obtained product was dri...
Embodiment 2
[0045] With 547g alumina (solid content 86wt%, Al 2 o 3 470.4g), 203g magnesium chloride (converted to magnesia 85.5g), and 2000g deionized water are mixed, the pH value of the mixture is adjusted to 7.5 with dilute ammonia water, stirred and aged at 40°C for 1 hour, filtered and dried at 120°C 12 hours, then calcined at 650° C. for 3 hours to obtain a composite alumina carrier. The weight ratio of alumina:magnesia is 1:0.18.
[0046] 280g cobalt nitrate Co(NO 3 ) 2 ·6H 2 0.160g ammonium metatungstate is dissolved in 900g ethanol (purity 99.9%) and makes impregnating liquid, gained impregnating liquid and above-mentioned composite alumina carrier (with respect to composite alumina carrier, the consumption of cobalt oxide is 8wt%, the amount of tungsten oxide The dosage is 15wt%) and mixed evenly (the solid-to-liquid weight ratio of composite alumina carrier: organic solvent is 1:2), kept at room temperature for 8h, then dried the product at 120°C for 6 hours, and baked it...
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