Heavy oil hydrotreating catalyst and preparation and application

Abstract

A heavy oil hydrotreating catalyst and its preparation and application. The catalyst contains a halogen bimodal pore alumina carrier and a hydrogenation active metal component loaded on the carrier. Represented by a mercury intrusion method, pore volume of the carrier is 0.95-1.2 ml / g, specific surface area is 50-300 m<2> / g, and the carrier presents bimodal pore size distribution at the diameter of 10-30nm and at the diameter of 300-500nm. Pore volume of pores with the diameter of 10-30nm accounts for 55-80% of the total pore volume, and pore volume of pores with the diameter of 300-500nm accounts for 10-35% of the total pore volume. The hydrogenation active metal component is selected from at least a VIB group metal component and at least a VB group metal component. Metered based on oxides and with the catalyst as the standard, content of the VIB group metal component is 0.2-15 wt%, and content of the VB group metal component is 0.2-12 wt%. In comparison with catalysts provided in the prior art, the catalyst provided by the invention has the advantage as follows: hydrodemetallization and diasphaltene activities are raised obviously.

Description

technical field [0001] The invention relates to a hydrogenation catalyst, its preparation and application, in particular to a hydrogenation treatment catalyst suitable for heavy oil processing, its preparation and its application. Background technique [0002] As the world-wide contradiction between heavy and low-quality crude oil and diversified and light-weight demand for petrochemical products becomes increasingly acute, the main task of the petrochemical industry will focus on lightening heavy oil. Residual oil is the heaviest fraction in crude oil. After crude oil is distilled, species with large molecular weight and complex structures are enriched in the residual oil. These impurities have an important impact on the subsequent processing and product properties. These impurities are removed. Compared with distillate oil, in addition to impurities such as sulfur and nitrogen, heavy oil also contains a higher proportion of metal impurities such as Ni and V, and has a hig...

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Problems solved by technology

Among them, if metal impurities such as Ni and V are not effectively removed, they will have an adverse effect on the downstream catalyst, block the pores of the downstream catalyst, and cause the deactivation of the downstream catalyst.

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