Catalyst with hydrogenation catalytic action, preparation method and application thereof and method of removing asphaltene by heavy oil hydrogenation

Abstract

The invention relates to the technical field of hydrocarbon oil hydrogenation, in particular to a catalyst with hydrogenation catalytic action, a preparation method and application thereof and a method of removing asphaltene by heavy oil hydrogenation. The catalyst comprises a supporter and a hydrogenation active ingredient supported thereon; the hydrogenation active ingredient includes at least one VB family metal; the supporter is a composition of a compound with hydrated alumina and at least two proton acceptor sites and a phosphorus-bearing compound. The hydrated alumina wet gel is used asa start material to prepare the supporter with high strength for the catalyst; the step of drying the hydrated alumina wet gel is omitted, the total process flow is simplified, total operation energyconsumption is lowered, dust pollution due to the preparation of the supporter from pseudo-boehmite dry gel powder is avoided, and the operation environment is greatly improved.

Description

Technical field [0001] The invention relates to the technical field of hydrocarbon oil hydrogenation. Specifically, the invention relates to a catalyst with hydrogenation catalysis and a preparation method and application thereof. The invention also relates to a heavy oil hydrogenation deasphalting method using the catalyst. . Background technique [0002] In traditional catalyst preparation methods, alumina shaped bodies, especially γ-alumina shaped bodies, are often used as support for supported catalysts because of their better pore structure, suitable specific surface area and higher heat resistance stability. use. This kind of alumina is usually obtained from dried hydrated alumina, such as pseudo-boehmite, which is shaped, dried, and calcined at high temperature. [0003] Based on the above understanding, such as figure 1 As shown, the prepared hydrated alumina wet gel needs to be dried to obtain pseudo-boehmite dry rubber powder, and then using the pseudo-boehmite dry rubb...

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Problems solved by technology

[0014] (1) Pseudo-boehmite that has not been completely dried has strong viscosity, is difficult to transfer, and easily causes secondary dust pollution;

[0015] (2) Drying starts from the surface. The drying of the wet solid product separated from the mixture obtained from the gelling reaction is incomplete drying, so there is a sandwich biscuit phenomenon, that is, the surface of part of the pseudo-boehmite is dried (that is, the dried surface is substantially free of free water), while the interior is still wet (that is, for the non-dried interior, the content of free water is basically maintained at the level before drying), since the surface is dried, Therefore, hard particles are formed. When peptizing agent and / or binder are added to this incompletely dried pseudo-boehmite and kneaded, the hard particles formed during the drying process are in the process of extrusion. It is easy to cause blockage and affect production efficiency;

[0016] (3) It is difficult to stably control the dry base of pseudo-boehmite. The instability of the dry base will cause great interference to the molding process, making the molding process very unstable, resulting in an increase in the amount of unqualified products and low production efficiency;

[0017] (4) CN103769118A adopts a conventional molding process when molding, yet because the dry basis (35%-50%) of the pseudo-boehmite it adopts is far lower than the conventional dry basis content (about 70%), that is The water content is high, and there is basically no extrusion pressure during the extrusion molding process. Therefore, the carrier obtained after the extrudate is dried and roasted has basically no mechanical strength. As long as a little external force is applied, it will be pulverized and has no possibility of industrial application. sex, which is the biggest problem facing the technology

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