Regeneration and reactivation method of coal liquefied oil hydrogenation deactivated catalyst

A technology of deactivated catalyst and hydrogenation catalyst, applied in the field of deactivated catalyst regeneration and reactivation, can solve the problem of limited recovery of hydrogenation catalyst activity, and achieve the effects of improving interaction, increasing the number, and changing the distribution of active phases

Active Publication Date: 2013-07-03
CHNA ENERGY INVESTMENT CORP LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional regeneration methods lead to limited activity recovery of hydrogenation catalysts

Method used

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  • Regeneration and reactivation method of coal liquefied oil hydrogenation deactivated catalyst
  • Regeneration and reactivation method of coal liquefied oil hydrogenation deactivated catalyst
  • Regeneration and reactivation method of coal liquefied oil hydrogenation deactivated catalyst

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Effect test

preparation example Construction

[0108] SiO 2 It is usually introduced as a component of the support in the preparation of the support, but the introduction of modifiers as regenerant post-treatment modifiers into regenerated catalysts has not been proposed in any patents.

[0109] The present invention adopts following technical scheme to realize the purpose of the present invention:

[0110] 1. Use a silicon-containing additive that does not contain sodium ions and deionized water (or deionized water and organic alcohol, or a mixture of deionized water and organic alcohol) to prepare an impregnating solution in a certain proportion, and the surface of the regenerated catalyst The lost Si additive is replenished.

[0111] Substantially free of sodium ions means that the content of sodium ions in the silicon-containing additive is less than 0.1 wt%. Silicon-containing additives can be selected from one or a mixture of two or more of the following: inorganic silicon-containing substances selected from silica...

Embodiment 1

[0151] The deactivated hydrogenation catalyst operating in the coal liquefied oil unit is taken out online from the T-Star ebullating bed unit, and the hydrocarbons on the surface of the catalyst are removed through the hot nitrogen band oil, wherein the temperature of the hot nitrogen gas is 250-280 °C, and the nitrogen band The air-to-agent ratio of oil is 300-400h -1 (vol / vol), residence time 3-5 hours. The number is recorded as ST.

[0152] The following examples use the ST catalyst obtained in Example 1 to carry out regeneration and revival experiments.

Embodiment 2

[0154] Take the catalyst ST after the hot nitrogen belt oil obtained in Example 1, and carry out the temperature-programmed regeneration of the deactivated hydrogenation catalyst through external regeneration according to the regeneration process of the deactivated hydrogenation catalyst described above, first at 250°C-350°C Most of the carbon deposits and sulfur on the surface of the deactivated catalyst are burned off, and then the temperature is programmed to rise to 450°C-470°C. The external regeneration of the deactivated catalyst is carried out by first raising the temperature and then increasing the oxygen content. Cool down to room temperature after regeneration to obtain SO catalyst.

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J38/48B01J38/20
Inventor 马辉石玉林吴秀章胡云剑金环年
Owner CHNA ENERGY INVESTMENT CORP LTD
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