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Regeneration method for heavy oil hydro-treating catalyst

A heavy oil hydrogenation and catalyst technology, applied in catalyst regeneration/reactivation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of high cost of waste catalyst treatment, environmental pollution, poor catalyst regeneration effect, etc., to achieve It is conducive to full recovery, avoiding excessive damage, and improving the recovery rate

Inactive Publication Date: 2012-01-11
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the solvent is used to regenerate the catalyst, the effect on different cokes is different, and the regeneration effect on the catalyst with a deep degree of coking and carbonization is poor
CN200410050722.4 uses a special solvent to regenerate the deactivated hydrogenation catalyst. Although it is mentioned that the residuum hydrogenation catalyst can be regenerated, the solvent regeneration can only remove coking substances generally, and the The regeneration effect of the residual oil hydrotreating catalyst deactivated by impurities is not ideal
[0005] For the hydroprocessing process of heavy raw materials including various residual oils and heavy oils, the deactivation of the catalyst lies in the carbon deposition in the catalyst pores and the deposition of various metals in the catalyst pores. The regeneration performance of the deactivated catalyst caused by this method is very poor, and generally it can only be used once. The spent catalyst can only be disposed of by metal recovery or landfill, resulting in high processing costs and environmental pollution problems.

Method used

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  • Regeneration method for heavy oil hydro-treating catalyst
  • Regeneration method for heavy oil hydro-treating catalyst

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The deactivated residual oil hydrotreating catalyst is first dry-distilled at 450°C until no obvious gas is generated, and then washed with 0.2mol / L hydrochloric acid solution for 15 minutes. The temperature of the hydrochloric acid solution washing is 50°C. The dosage is 8L / Kg, then washed twice with water, dried and roasted at 500°C until the CO in the roasting tail gas 2 The volume concentration is lower than 0.03%. The analysis shows that the pore volume, specific surface area and other indicators of the regenerated catalyst are close to those of the fresh catalyst, and the removal rate of deposited metal impurities is about 82%. The regenerated catalyst is evaluated in a small experimental device for hydrogenation of residual oil, and the activity of the fresh catalyst is taken as 100%. According to the calculation, the activity of the regenerated catalyst reaches 92%, which can be used again.

Embodiment 2

[0028] The deactivated residual oil hydrotreating catalyst is dry-distilled at 500°C until no obvious gas is produced, and then washed with 0.4mol / L hydrochloric acid solution for 30 minutes. The temperature of the hydrochloric acid solution is 30°C, and the ratio of hydrochloric acid solution to catalyst is The dosage is 15L / Kg, then washed twice with water, dried and roasted at 450°C until the CO in the roasting tail gas 2 The volume concentration is lower than 0.03%. The analysis shows that the pore volume, specific surface area and other indicators of the regenerated catalyst are close to those of the fresh catalyst, and the removal rate of deposited metal impurities is about 85%. The regenerated catalyst is evaluated in a small experimental device for hydrogenation of residual oil, and the activity of the fresh catalyst is taken as 100%. According to statistics, the activity of the regenerated catalyst reaches 93%, which can be used again.

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Abstract

The invention discloses a regeneration method for a heavy oil hydro-treating catalyst. The regeneration method comprises the following steps of: performing dry distillation, washing with an acidic solution, and performing roasting coke removal treatment, wherein the dry distillation temperature is 300 to 550 DEG C, the acidic solution is a hydrochloric acid-containing solution, the weight ratio of the washing acid to the catalyst is 5 to 50L / Kg, and the acid concentration is 0.1 to 0.5mol / L. Compared with the prior art, the regeneration method has the advantage of well recovering the service performance of an inactivated catalyst.

Description

technical field [0001] The invention relates to a regeneration method for a heavy oil hydrotreating catalyst, in particular to a treatment method for regenerating a heavy oil hydrotreating catalyst after being unloaded from a reactor after deactivation. Background technique [0002] With the deterioration of crude oil quality and the stricter requirements of environmental protection regulations, hydrogenation technology has become an important means of oil processing, and accordingly, the amount of various hydrogenation catalysts has increased. The hydrogenation catalyst will gradually deactivate during use, and after a certain period of operation, the activity will drop to a certain level, and it needs to be shut down for processing. In ordinary hydroprocessing technology, the deactivation of the catalyst is mainly due to the carbon deposition on the surface of the catalyst pores, which can generally be removed by solvent extraction or roasting decarbonization, and the acti...

Claims

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Application Information

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IPC IPC(8): B01J38/00B01J38/02B01J38/60
Inventor 刘建锟杨涛胡长禄蒋立敬贾永忠陈涛
Owner CHINA PETROLEUM & CHEM CORP
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