A catalyst for residual oil hydrotreating and its preparation and application

Abstract

The invention discloses a residuum hydrotreatment catalyst, and preparation and application thereof. The catalyst comprises an aluminium oxide carrier and a hydrogenation active metal composition. The hydrogenation active metal composition comprises at least one metal composition selected from group VIII and at least one metal composition selected from groups VI B. Based on the catalyst in terms of oxides, the content of the group VIII metal composition is larger than 3 wt% and less than or equal to 10 wt%, and the content of the group VI B metal composition is larger than 10 wt% and less than or equal to 40 wt%. The carrier has a double-peak pore structure, and characterized by mercury intrusion porosimetry, the carrier has the pore volume of 0.6-1.4 mL / g and the specific surface area of 80-400 m<2> / g, the pore volume of pores with the diameter of 5-20 nm accounts for 30-60% of the total pore volume, and the pore volume of pores with the diameter of 100-300 nm accounts for 15-45% of the total volume. Compared with the prior art, the provided catalyst has relatively good hydrogenation residual-carbon removal performance when being applied to residuum hydrotreatment.

Description

technical field [0001] The invention relates to a heavy oil hydrotreating catalyst and its preparation and application. Background technique [0002] As the contradiction between heavy and low-quality crude oil and the diversification and light-weight of petrochemical products worldwide becomes increasingly acute, the combined process of residual oil hydrogenation and catalytic cracking is becoming more and more important. The main purpose of residual oil hydrogenation technology is to provide qualified raw materials for catalytic cracking (RFCC). As RFCC feed, the properties of residual oil hydrogenation products, especially the metal, sulfur, nitrogen and carbon residue values, have an important impact on the catalytic cracking process. Among them, the carbon residue value of residual oil hydrogenation products is more important to the impact of catalytic cracking. The carbon residue value of heavy oil represents the coking trend of high boiling point components in the pr...

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Problems solved by technology

[0004] The disadvantage of existing heavy oil hydrogenation catalysts is that their S, N removal rates, heavy metal removal rates and asphaltenes removal rates cannot be well matched. For example, catalysts with high metal removal activity often S, N removal rate and carbon residue removal rate are not high

[0008] However, the ubiquitous problem of catalysts provided by the prior art is that the removal rate of carbon residue is low

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