Catalyst for hydrotreating of boron-containing residual oil and preparation method thereof

Abstract

The invention discloses a catalyst for hydrotreating of boron-containing residual oil and a preparation method thereof. The catalyst has mesopores which are intensively distributed and are uniform insize; the pore diameters of the mesopores range from 10 to 30 nm; in-situ modification of a boron-containing compound is carried out in the forming process of pore channels; the surfaces of the pore channels have relatively strong acidity which is uniformly distributed; the mesoporous channels are beneficial for diffusion of macromolecules such as residual oil; the increase of mesoporous acidity of the catalyst is beneficial for improving the adsorption and reaction performance of metallic nickel compounds and sulfur compounds in the residual oil; due to the existence of boron, the interactionbetween the active metal of the catalyst and the carrier of the catalyst is weakened, the formation of a metal hydrogenation active phase is facilitated, the hydrogenation performance of the active metal of the catalyst is improved, hydrogenation removal of a metal nickel compound is better facilitated, and thus, the nickel removal and desulfurization performance of the catalyst are improved; andthe catalyst can be used as a transition agent of a demetalization catalyst and a desulfurization catalyst to improve the overall efficacy of a graded catalyst for fixed-bed residual oil hydrotreatment.

Description

technical field [0001] The invention relates to a catalyst and a preparation method thereof, more specifically, to a boron-containing residual oil hydrotreating catalyst and a preparation method thereof, belonging to the field of petrochemical industry. Background technique [0002] Vacuum residue oil has the characteristics of high content of metal compounds, sulfides and nitrides, complex macromolecular structures such as colloids and asphaltenes, and is difficult to process, which has become the focus and difficulty of refinery processing. Fixed bed residue hydrotreating technology is an effective means to realize the clean utilization of vacuum residue. However, due to the presence of heteroatoms in the residual oil, the hydrotreating catalyst is easily deactivated by the deposition of metals and carbon deposits. The service life of the residual oil hydrotreating catalyst is generally about one year, or even shorter, and the use cost of the catalyst higher. The develop...

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Problems solved by technology

The carrier prepared by this method is prone to uneven surface acid distribution and pore blockage, which is not conducive to the dispersion of catalyst active metals, and the catalyst has low hydrogenation performance, poor anti-coking performance, and poor stability.

[0006] In summary, based on the differences in the diffusion and reaction characteristics of metal Ni, V and other compounds in the residue oil in the catalyst, the problem of high vanadium removal activity and low nickel removal activity of the macroporous residue hydrodemetallation catalyst needs to be developed. Hydrodenickelization Catalyst More Suitable for Metallic Nickel Removal

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