A hydrocarbon oil desulfurization catalyst and its preparation method and method for hydrocarbon oil desulfurization
A desulfurization catalyst and hydrocarbon oil technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve problems such as poor wear resistance, unstable structure, and low desulfurization activity, and achieve the goal of using Long life, good wear resistance, and low catalyst loss
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[0031] The present invention also provides the preparation method of the hydrocarbon oil desulfurization catalyst of the present invention, the method comprising: (1) silicon nitride, alumina binder, at least one metal oxide selected from IIB, VB and VIB group elements , water and acid liquid are mixed, and the carrier slurry obtained by mixing is shaped, first dried, and first roasted to obtain a carrier; (2) introducing the precursor of a metal accelerator into the carrier, and then performing second drying and second calcination to obtain a catalyst precursor; (3) reducing the catalyst precursor in a hydrogen atmosphere to obtain a hydrocarbon oil desulfurization catalyst.
[0032] The mixing process described in step (1) of the preparation method of the hydrocarbon oil desulfurization catalyst provided by the present invention may not specifically limit the timing of adding silicon nitride, and a specific embodiment is: the mixing process described in step (1) The method i...
Embodiment 1
[0060] This example is used to illustrate the method for preparing a hydrocarbon oil desulfurization catalyst of the present invention.
[0061] (1) Prepare the carrier. 4.43kg of zinc oxide powder (Headhorse company, purity 99.7% by weight) was mixed with 6.57kg of deionized water, and stirred for 30 minutes to obtain a zinc oxide slurry;
[0062] Get pseudo-boehmite 1.81kg (catalyst Nanjing branch, containing 1.36kg on a dry basis) and 2.40kg of silicon nitride (purity > 99.0% by weight, α phase, Qinhuangdao Yinuo High-tech Material Development Co., Ltd.) stirring and mixing, and then Add 4.6kg of deionized water and mix evenly to form a slurry, then add 360ml of 30% by weight hydrochloric acid (chemically pure, produced by Beijing Chemical Factory) to make the slurry pH = 2.1, stir and acidify for 1 hour, then heat up to 80°C for aging for 2 hours, then add oxidation The zinc slurry is mixed and stirred for 1 hour to obtain a carrier slurry;
[0063] The carrier slurry wa...
Embodiment 2
[0068] This example is used to illustrate the method for preparing a hydrocarbon oil desulfurization catalyst of the present invention.
[0069] Stir and mix 1.56kg of pseudoboehmite (catalyst Nanjing branch, containing 1.17kg on a dry basis) and 1.80kg of silicon nitride, then add 8.2kg of deionized water and mix evenly to form a slurry, then add 260ml of 30% by weight hydrochloric acid to make the pH of the slurry = 1.9, stir and acidify for 1 hour, then raise the temperature to 80° C. and age for 2 hours. After the temperature dropped, 5.52 kg of zinc oxide powder was added and stirred for 1 h to obtain a carrier slurry.
[0070] Referring to the method of Example 1, the carrier slurry was spray-dried and shaped, and the active component nickel was introduced, and the hydrocarbon oil desulfurization catalyst A2 was obtained after reduction.
[0071] The chemical composition of A2 is: the content of zinc oxide is 55.2% by weight, the content of silicon nitride is 18.0% by w...
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