Hydrofinishing catalyst and preparation method thereof
A technology for hydrorefining and catalyst, applied in chemical instruments and methods, physical/chemical process catalyst, chemical/physical process, etc., can solve the problems of short service life of catalyst and low activity of hydrorefining catalyst, and achieve efficient dispersion, The effect of catalyst hydrotreating performance improvement and long service life
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[0024] The present invention provides a new hydrorefining catalyst and its preparation method. The catalyst comprises a gamma-alumina carrier and an active metal component supported on the gamma-alumina carrier. The active metal component includes nickel and at least A metal element selected from group VIB, the surface of the catalyst has a network structure, the grid density of the network structure is 0.5-50 / square micron, and the grid density is obtained by scanning at least 20 It is determined by the method of calculating the average value of the number of grids distributed in each square micron area in the electron micrograph.
[0025] According to the present invention, preferably, the grid density of the network structure is 5-20 grids / square micron.
[0026] The present invention has no special limitation on the number of photographs taken by the scanning electron microscope, preferably the grid density is determined by calculating the average value of the number of gr...
Embodiment 1
[0068] (1) 75.0g of γ-Al 2 o 3 Carrier (infrared hydroxyl spectrum see figure 2 Middle curve 1) immersed in a solution of 250.0g deionized water, 9.0g urea, 12.0g ammonium nitrate and 14.6g nickel nitrate hexahydrate, heat treated at 85°C for 18 hours, filtered, washed and then dried at 120°C for 3 hours to obtain Ni-modified alumina support, the SEM image of the Ni-modified alumina support is as follows figure 1 As shown, the grid density is listed in Table 1, and the infrared hydroxyl spectrum is shown in figure 2 Middle curve 2. From figure 1 It can be seen that the surface of the Ni-modified alumina support has a large number of network structures. From figure 2 It can be seen that the hydroxyl sites (acidic, basic and neutral) on the surface of the Ni-modified alumina support are much higher than that of γ-Al 2 o 3 Carriers are drastically reduced.
[0069] (2) preparation contains the solution of 39.0g deionized water, 23.4g molybdenum trioxide, 8.4g basic ni...
Embodiment 2
[0083] (1) 75.0g of γ-Al 2 o 3 The carrier was immersed in a solution of 250.0g deionized water, 15.0g urea, 6.7g ammonium nitrate and 36.0g nickel nitrate hexahydrate, heat treated at 90°C for 12 hours, filtered, washed and then dried at 150°C for 2 hours to obtain Ni modified The alumina support, grid density is listed in Table 1.
[0084] (2) preparation contains the solution of 70.0g deionized water, 39.0g molybdenum trioxide, 27.0g basic nickel carbonate and 13.5g phosphoric acid, the alumina carrier of step (1) gained Ni modification is immersed in wherein 1 hour, in Dry at 120°C for 3 hours, and calcinate at 480°C for 2 hours in an air flow of 100 mL / min to obtain catalyst S-2.
[0085] Catalyst S-2 grid density and composition are listed in Table 1.
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