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A kind of start-up preparation method of hydrotreating unit

A technology of hydroprocessing and preparation methods, which is applied in the fields of start-up of hydroprocessing operations, treatment of hydrocarbon oil, petroleum industry, etc., to achieve the effect of reducing the difficulty and danger of operations, reducing risks, and reducing workload

Active Publication Date: 2021-02-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Aiming at the problems existing in the gas-tight start-up process of using the second type of active center external presulfurized catalyst, the present invention provides a hydrogenation start-up preparation method

Method used

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  • A kind of start-up preparation method of hydrotreating unit
  • A kind of start-up preparation method of hydrotreating unit
  • A kind of start-up preparation method of hydrotreating unit

Examples

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Embodiment 1

[0041]A certain hydrogenation unit is equipped with an external pre-sulfurized type 2 active center hydroprocessing catalyst. The properties of the catalyst are shown in Table 2, and the system design pressure is 12MPa. Preparation and start-up process include:

[0042](1) Nitrogen is introduced into the reaction system, followed by low pressure airtight at 1.0Pa, 3.0MPa, and 5.0MPa;

[0043](2) After the airtightness is qualified, after the system pressure is reduced to 2.7MPa, hydrogen is introduced to keep the pressure constant at 3.4MPa, and then the catalyst bed temperature is raised to 100°C for 4 hours; the heating rate is 20°C / h;

[0044](3) Keep the pressure constant, continue to increase the catalyst bed temperature to 120°C for 4 hours at a rate of ~7°C / h;

[0045](4) Continue to increase the catalyst bed temperature to 140°C at a rate of ~7°C / h, and keep it constant;

[0046](5) When the reactor wall temperature is greater than 120°C, the maximum temperature rise of the catalyst bed is...

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Abstract

The invention discloses a start-up preparation method for a hydrotreating device. The method is aimed at the start-up process, especially the air-tight process, of an off-site pre-sulfided hydrotreating catalyst containing sulfinyl compounds. By setting a constant pressure heating section, a constant pressure constant temperature section and a constant pressure heating section, the gas-tight start-up process is The heat generated by the hydrogenolysis of sulfide and / or auxiliaries is reasonably distributed and controlled, which avoids the occurrence of concentrated heat release and reduces the risk of over-temperature and overheating. The method of the invention completely solves the obstacles in the industrial application process of the catalyst, not only improves the use activity of the catalyst, but also eliminates the environmental protection hidden danger of leakage of the vulcanizing agent, and has a good application prospect.

Description

Technical field[0001]The invention relates to a preparation method for the start of a hydrotreating device, in particular to a process method for reducing the risk of over-temperature during the airtight process of an external presulfided type two active center catalyst.Background technique[0002]Hydrogenation process is the process of making feedstock oil hydrodesulfurization, hydrodenitrogenation, polycyclic aromatic hydrocarbon hydrogenation saturation, etc. under the action of hydrogen, high temperature conditions and catalysts, so as to transform it into clean oil and intermediate blends. The hydrogenation catalysts currently produced in the domestic industry are basically oxidized. Industrially produced new catalysts or regenerated catalysts, the active metal components (Mo, Ni, Co, W) contained in them are all in the oxidation state (MoO3, NiO, CoO, WO3) Exists in the form of. Basic research and industrial application practices show that most of the active metal components of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G49/24
CPCC10G49/24C10G2300/4006C10G2300/4012C10G2300/703
Inventor 王仲义崔哲曹正凯唐兆吉彭冲范思强
Owner CHINA PETROLEUM & CHEM CORP
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