Method of hydrogenation demetalization for hydrocarbon oil
A technology of hydrodemetallization and hydrogenation metal, which is applied in refining to remove heteroatoms, etc., can solve the problems of insufficient demetallization rate and short operation period, and achieve the effect of high demetallization rate and high activity
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preparation example Construction
[0017] The preparation method of the catalyst used in the method provided by the invention comprises impregnating an alumina support with a solution containing a VIB group and a VIII group metal compound, drying and calcining, wherein the alumina support is a gamma-alumina, which The pore distribution is such that the pore volume of pores with a pore diameter of 10-20 nanometers accounts for more than 70% to 98% of the total pore volume. The preparation method of the alumina support includes extruding a mixture of pseudo-boehmite, acid, water and extrusion aids, drying and calcining the obtained molding, wherein the drying method of the molding is at 90- At a temperature of 300°C, within 35 minutes, the molded article is completely dried, and the method of roasting the molded article is to bake at a temperature of 600-800°C for at least 0.5 hour in an atmosphere containing water vapor. In the atmosphere, the content of water vapor is not less than 10% by volume.
[0018] Wher...
example 1
[0029] This example illustrates the nature of the alumina support for the catalyst used in the process provided by the invention and its preparation.
[0030] Take by weighing the pseudo-boehmite prepared by 300 gram CN1247772A example 1, mix uniformly with 9.3 gram concentration of 65 weight percent nitric acid, 9 gram asparagus powder and 330 gram deionized water, and extrude into a circumcircle diameter of 1.8mm trefoil strip. Blast drying at 110°C, and the moldings are completely dried after 25 minutes. The dried molded product is fed with 100% water vapor at a temperature of 650°C, the flow rate is 1.5 grams of water vapor per gram of catalyst per hour, and calcined for 5 hours to obtain alumina carrier Z 1 . Z 1 properties are listed in Table 1. Wherein, the phase of alumina is determined by X-ray diffraction method. Specific surface, pore volume, calculable pore size and pore distribution were all measured by low temperature nitrogen adsorption BET method.
example 2
[0032] This example illustrates the nature of the alumina support for the catalyst used in the process provided by the invention and its preparation.
[0033] Prepare the alumina support by the method of Example 1, the difference is that the temperature of calcination is 750 ℃, the calcination time is 2 hours, the atmosphere of calcination is the mixed gas of water vapor and air containing 10% by volume of water vapor, and the flow rate is per gram of catalyst per 0.5 g of water vapor per hour to obtain the alumina carrier Z 2 . Z 2 properties are listed in Table 2.
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