Residual oil hydrotreating catalyst and preparation method thereof

Abstract

The invention discloses a residual oil hydrotreating catalyst and a preparation method thereof. In the catalyst, the active metal constituents are Group VIII metals and Group VIB metals; and the supporter is composed of aluminum oxide and mesoporous molecular sieve, wherein the mesoporous molecular sieve accounts for 4.5-9.5 wt% of the supporter. In the catalyst supporter preparation process, a proper amount of alkaline nitrogen-containing compound is added into the raw materials quasi-boehmite, aluminum oxide powder and mesoporous molecular sieve; and due to the actions of blending and sintering, the prepared catalyst has large specific area, large pore size and proper pore structure, reduces the diffusion restriction of the reactants, is suitable for catalyzing macromolecule-participated reactions, has proper acid value and improved wear resistance, and maintains the desulfurization activity on the premise of enhancing the hydrogenation demetallization and deasphaltenizing activities.

Description

technical field [0001] The present invention relates to a hydrogenation treatment catalyst and its preparation method, more specifically to a fluidized bed residual oil hydrogenation deasphaltene, demetallization or desulfurization catalyst and its preparation method. Background technique [0002] The demand for distillate oil worldwide is increasing year by year, but due to the limited production of light crude oil, the output of distillate oil cannot meet the current demand. However, the production of heavy oil or residual oil is increasing, in order to meet the demand for distillate oil, it is necessary to convert these low-quality feedstock oil into distillate oil products with high demand, thus promoting the hydro-upgrading technology of residual oil development of. Residue hydrogenation upgrading technologies mainly include fixed bed, moving bed, and ebullating bed hydrogenation processes. Although the fixed bed hydrogenation process is relatively mature, it has stric...

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Problems solved by technology

[0010] CN1070418A adopts the catalyst prepared by the full kneading method, uses titanium and boron as improvers, and its initial activity is better, but due to stronger acidity, NH 4 - The acidity of TPD reaches 1.449mmol / g, the carbon deposition speed is fast, the catalyst deactivation is fast, and the service life is short

[0013] In the existing method for preparing residual oil hydrodemetallization, deasphaltene and desulfurization catalysts, when carbon black powder, organic additives and other pore-enlarging agents are used, it is easy to overheat during roasting, the temperature control is complicated, and the stability of product quality is poor. ; When USY molecular sieve is used to improve the asphaltene removal effect, its acidity is stronger, and the cracking reaction on the surface of the catalyst is too much; when two kinds of alumina with different pore size distribution are used as the catalyst matrix, the acidity of the prepared catalyst is difficult to control, namely It is difficult to balance the desulfurization activity in the case of increasing demetallization and deasphaltene