Catalyst for FCC gasoline sweetening and preparation method thereof

Abstract

The present invention relates to a catalyst for sweetening FCC gasoline. The catalyst comprises an alumina carrier having a macroporous structure and the metal active components nickel and molybdenum supported on the carrier, the alumina carrier having the macroporous structure is 66-91 wt% by weight percentage, the carrier contains auxiliary components phosphorus and magnesium, the pore size distribution is 60-180nm, the pore ratio is 2-75%, the pore volume 0.8-2.0 ml / g, and specific surface area is 250-300 m<2> / g. The content of nickel oxide is 5-19 wt%, and the molybdenum oxide content is 2-15wt%. The catalyst has the advantages of high sweetening activity, high hydrogenation selectivity of diolefin, and less loss of octane value.

Description

Technical field [0001] The invention relates to a catalyst used for FCC gasoline sweetening and a preparation method. Background technique [0002] With the increasingly stringent environmental regulations, countries around the world have put forward more and more stringent requirements on the quality of petroleum processed products, especially the restrictions on the sulfur content of petroleum processed products. The sulfides contained in light petroleum products are mainly mercaptans (RSH), sulfides (RSR), etc. Among them, mercaptans have the greatest impact on product quality. They not only have a foul odor, but are also highly corrosive, but also affect The stability of the product. [0003] CN1229838A discloses a method for converting hydrocarbon oil. The method is to desulfurize raw oil and a hydrorefining catalyst under the process conditions of hydrodesulfurization. The hydrorefining catalyst contains Tungsten oxide (molybdenum), nickel oxide and cobalt oxide, wherein th...

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Problems solved by technology

The disadvantage is that the size of the macropore (300nm or 400nm) is completely determined by the size of the polystyrene droplet introduced twice, that is, the size of the macropore depends on the size of the polystyrene droplet

The pore size cannot be adjusted by partially changing the components of the solution itself and the interaction of organic molecules in the system

Huining Li et al. (Inorganic Chemistry, 2009, 48:4421) also used the sol-gel method to introduce polymethyl methacrylate (PMMA) droplets with a single dispersed phase into the mixed solution using F127 as a template to achieve large Pore-the formation of macropores in mesoporous alumina, the disadvantage is that the size of the macropores is completely determined by the size of the secondary introduction of polymethyl methacrylate droplets, which cannot be achieved by partially changing the components of the solution system itself The adjustment of the pore size is used to realize the formation of the macropore-mesopore composite pore structure, so it is impossible to realize the controllable adjustment of the macropore-mesopore diameter. In the process of use, especially for the macromolecular catalytic process of complex components limitations

Because mercaptan has the greatest impact on the quality of petroleum products, it not only has a foul smell, is highly corrosive, but also affects the stability of the product

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