Desulfurization catalyst, preparation method thereof and hydrocarbon desulfurization method
A technology for desulfurization catalysts and hydrocarbons, which is applied in the field of preparation of desulfurization catalysts and hydrocarbon desulfurization. It can solve problems such as catalyst wear, reduce device operation cycle, and catalyst consumption, and achieve excellent wear resistance.
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specific Embodiment approach
[0036] According to a preferred embodiment, the carrier is obtained by a method comprising the following steps:
[0037] A silicon source, alumina, and zinc oxide are mixed to obtain a carrier mixture, and the carrier mixture is sequentially subjected to molding, drying (hereinafter referred to as second drying), and firing (hereinafter referred to as second baking).
[0038] Preferably, the silicon source is at least one selected from clay, diatomaceous earth, expanded perlite, chert, hydrolyzed silica and silica gel.
[0039] According to a preferred embodiment, the method of the present invention further includes: after the step (2), reducing the obtained catalyst precursor in the presence of a reducing atmosphere.
[0040] In the catalyst preparation method provided by the present invention, the described washing, drying, roasting, and reduction processes are well known to those skilled in the art, and the present invention will not be repeated here one by one. limit.
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Embodiment 1
[0067] Dissolve 2.9 kg of hydrated nickel nitrate in 12.5 kg of water, add 3.0 kg of polyvinylpyrrolidone, and stir for 60 minutes to form a nickel nitrate solution. Another 1.6kg of sodium borohydride was dissolved in 10kg of water to form a reducing agent solution. Mix the nickel nitrate solution and the reducing agent solution at 25° C. and 800 rpm, and continue to stir for 12 hours to form a metal particle slurry (the measured average particle diameter of the metal particles is 83 nm).
[0068] Take 2.3 kg of alumina and 2.0 kg of clay and mix them under stirring, then add 5.5 kg of deionized water and mix evenly, add 200 ml of 30% by weight hydrochloric acid, stir and acidify for 1 hour, then heat up to 80°C and age for 2 hours to obtain a binder slurry . 2.5 kg of zinc oxide powder and 2.5 kg of deionized water were mixed and stirred for 120 minutes to obtain a zinc oxide slurry. The zinc oxide slurry and the binder slurry were mixed and then stirred for 2 hours to obt...
Embodiment 2
[0072] Dissolve 3.2 kg of hydrated nickel nitrate and 0.2 kg of hydrated copper nitrate in 12.5 kg of water, add 1.0 kg of glycerol, and stir for 60 minutes to form a metal salt solution. Under a hydrogen atmosphere of 3.0 MPa, the reduced metal salt solution was stirred at 180° C. and 800 rpm, and reacted for 12 hours to form a metal particle slurry (the average particle diameter of the metal particles was measured to be 80 nm).
[0073] Take 3.0 kg of alumina and 15.0 kg of deionized water, mix and stir, add 280 ml of concentrated nitric acid, stir and acidify for 1 hour, then raise the temperature to 80°C for 2 hours of aging. When the temperature dropped below 40° C., 1.0 kg of expanded perlite and 6.3 kg of zinc oxide powder were added and stirred for 120 minutes to obtain a zinc oxide slurry. The zinc oxide slurry and the binder slurry were mixed and then stirred for 2 hours to obtain a carrier slurry. Refer to the spray drying method of Example 1 and spray dry to obtai...
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Abstract
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