Regeneration method of hydrogenation catalyst

A hydrogenation catalyst and catalyst technology, which can be used in catalyst regeneration/reactivation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems that the physicochemical properties and structure of hydrogenation catalysts cannot meet the requirements of industrial production, etc. To achieve the effect of eliminating interactions, preventing metal structure changes, and improving quality

Active Publication Date: 2021-06-22
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] To sum up, the conventional methods of burning sulfur and carbon are adopted in the prior art, and the physical and chemical properties and structure of the regenerated hydrogenation catalyst cannot meet the requirements of industrial production.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) After sampling the deactivated sulfide residue hydrogenation catalyst from the reaction device, seal it with ethanol liquid. Using a fat extractor, the above-mentioned catalyst is immersed in toluene solution, heated to the boiling state of toluene and refluxed to condense for 24 hours, after the extraction is completed, vacuum-dried to obtain a deactivated catalyst (based on the source of the deactivated hydrogenation catalyst The weight meter of fresh catalyst, contained deposition metal iron and vanadium, the total content of metal simple substance is 1.33%).

[0037] (2) Weigh 100 g of the deactivated catalyst obtained in step (1) and immerse it in 400 mL of ethanol aqueous solution, the volume ratio of ethanol to water is 1:1. Place the beaker containing the aqueous ethanol solution and the deactivated catalyst in an ultrasonic generator at a frequency of 40KHz, continue ultrasonication for 15 minutes, let it stand for 10 minutes, and then treat it with ultraso...

Embodiment 2

[0042] (1) After sampling the deactivated sulfide residue hydrogenation catalyst from the reaction device, seal it with ethanol liquid. Using a fat extractor, the deactivated catalyst is immersed in the toluene solution, heated to the boiling state of the toluene and refluxed to condense, and maintained for 24 hours, the extraction is completed, and vacuum-dried to obtain the deactivated catalyst (with the deactivated hydrogenation catalyst Source fresh catalyst by weight, contained deposition metal iron and vanadium, the total content of the metal element is 1.33%).

[0043] (2) Weigh 100 g of the deactivated catalyst obtained in step (1) and immerse in 400 mL of polyvinylpyrrolidone aqueous solution, the concentration of the polyvinylpyrrolidone aqueous solution is 0.2 g / mL. Place the beaker containing the ketone and catalyst in a sonicator at a frequency of 35KHz. Ultrasound was continued for 15 minutes. Let stand for 10 minutes, sonicate for another 15 minutes, and let s...

Embodiment 3

[0048] (1) After sampling the deactivated sulfide residue hydrogenation catalyst from the reaction device, seal it with ethanol liquid. Using a fat extractor, the deactivated catalyst is immersed in the toluene solution, heated to the boiling state of the toluene and refluxed to condense, and maintained for 24 hours, the extraction is completed, and vacuum-dried to obtain the deactivated catalyst (with the deactivated hydrogenation catalyst Source fresh catalyst by weight, contained deposition metal iron and vanadium, the total content of the metal element is 1.33%).

[0049] (2) Weigh 100 g of the deactivated catalyst obtained in step (1), soak it in 400 mL of isopropanol-ethanol solution, and place it in an ultrasonic generator with a frequency of 40 KHz. Ultrasonication continued for 15 minutes, standing still for 10 minutes, and then ultrasonic treatment for 15 minutes, and then standing still, and this process was repeated until the ultrasonic treatment time reached 1.5h....

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Abstract

The invention provides a regeneration method of a hydrogenation catalyst. The method comprises the following steps: (1) immersing an inactivated hydrogenation catalyst A in a solvent, carrying out ultrasonic treatment to obtain a catalyst B and a mixed material mixed with black powder, recovering the catalyst B, and filtering the mixed material mixed with the black powder to obtain powder C; (2) grinding the catalyst B into powder, and screening to obtain catalyst powder D; (3) forming, drying and roasting the catalyst powder D to obtain a regenerated carrier; and (4) dissolving the powder C obtained in the step (1) in diesel oil, dipping on a regenerated carrier, and drying to obtain the regenerated hydrogenation catalyst. According to the method disclosed by the invention, additional supplement of active metal components is not needed, interaction between the carrier and metal molybdenum is basically eliminated in the preparation process of the catalyst, and uniform dispersion of molybdenum sulfide can also be realized, so that the obtained regenerated hydrogenation catalyst has relatively good physicochemical properties and activity. And the use amount of the vulcanizing agent can be reduced and the vulcanizing time can be shortened at the start-up stage of the industrial device.

Description

technical field [0001] The invention relates to a catalyst regeneration method, more specifically, to a hydrogenation catalyst regeneration method. Background technique [0002] Residual oil hydrogenation technology has the characteristics of strong feedstock adaptability, simple production and operation process, etc., and can provide high-quality feedstock for downstream catalytic cracking processes. It has become one of the most important heavy oil processing technologies in modern oil refining and petrochemical industries. In particular, in recent years, the amount of residual oil hydrotreating in China has been increasing, and the demand for residual oil hydrogenation catalysts has also increased significantly. In addition, the residual oil contains high content of metals, colloids, and asphaltenes, resulting in a generally 1 to 2-year operating cycle of the residual oil hydrogenation unit, and the catalyst will not be regenerated for use. Therefore, there are a large a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J38/52B01J38/68B01J38/02B01J27/051B01J38/50B01J27/30C10G45/08
CPCB01J38/52B01J38/68B01J38/02B01J27/0515B01J38/50B01J27/30C10G45/08Y02P20/584
Inventor 袁胜华关月明张成王永林
Owner CHINA PETROLEUM & CHEM CORP
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