Regeneration and reactivation method of coal liquefied oil hydrogenation deactivated catalyst

Abstract

The invention provides a regeneration and reactivation method of a coal liquefied oil hydrogenation deactivated catalyst, which comprises the following steps: a) preparing an impregnating solution from a silicon-containing additive and deionized water, or from deionized water and an organic alcohol mixture in proportion, wherein the silicon-containing additive component in the impregnating solution accounts for 0.04-0.5 wt% of the total weight of the prepared solution; b) mixing the impregnating solution prepared in step a) with the regenerated hydrogenation catalyst, impregnating the regenerated hydrogenation catalyst at a first predetermined temperature and pressure for first predetermined time, wherein the silicon-containing additive component in the impregnating solution, when converted into the Si content, accounts for 0.03-0.5 wt% of the regenerated hydrogenation catalyst to be reactivated; c) drying the hydrogenation catalyst impregnated in step b) at a second predetermined temperature and pressure for second predetermined time, optionally, continuing drying at a third predetermined temperature and pressure for third predetermined time; d) roasting the impregnated hydrogenation catalyst dried in step c) at a fourth predetermined temperature for fourth predetermined time to obtain the reactivated hydrogenation catalyst.

Description

technical field [0001] The invention generally relates to a deactivated catalyst regeneration and revival method for a hydrogenation catalyst, and in particular to a method for regenerating a deactivated catalyst for a coal liquefied oil. Background technique [0002] T-Star is a mild hydrocracking process using an ebullating bed reactor for the treatment of vacuum gas oil (VGO) or deasphalted oil (DAO). It uses a gas, liquid, and solid three-phase fluidized bed reactor to achieve The back-mixing of liquid materials and catalyst particles in the reactor makes the reaction temperature in the reactor uniform, thereby minimizing the occurrence of side reactions and making the reaction temperature constant throughout the operation cycle, so T-star technology is effective in processing difficult-to-process raw materials ( It has obvious advantages when including vacuum gas oil, secondary processed gas oil or deasphalted oil containing a large amount of metal impurities, high carb...

AI Technical Summary

Problems solved by technology

Conventional regeneration methods lead to limited activity recovery of hydrogenation catalysts

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