Startup preparation method for hydrotreating device

A technology of hydroprocessing and preparation method, which is applied in the direction of start-up of hydroprocessing operation, treatment of hydrocarbon oil, petroleum industry, etc.

Active Publication Date: 2020-07-07
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 cen

Method used

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  • Startup preparation method for hydrotreating device
  • Startup preparation method for hydrotreating device
  • Startup preparation method for hydrotreating device

Examples

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Embodiment 1

[0041] A hydrogenation unit is loaded with an external presulfurization type II active center hydrogenation catalyst, the properties of the catalyst are shown in Table 2, and the design pressure of the system is 12MPa. The start-up preparation and start-up process includes:

[0042] (1) Introduce nitrogen into the reaction system, and perform low-pressure airtightness at 1.0Pa, 3.0MPa, and 5.0MPa in sequence;

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

[0044] (3) Keep the pressure constant, and continue to raise the temperature of the catalyst bed to 130°C at a rate of ~7°C / h for 4 hours;

[0045] (4) Continue to raise the catalyst bed temperature to 160°C at a rate of ~7°C / h, and keep the temperature constant;

[0046] (5) When the reactor wall temperature is higher than...

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Abstract

The invention discloses a startup preparation method of a hydrotreating device. The method aims at the starting process of the ex-situ prevulcanization type hydrotreating catalyst containing the carboxyl compound. Particularly, in the airtight process, a constant-pressure heating section, a constant-pressure constant-temperature section and a constant-pressure heating section are arranged, so heatgenerated by hydrogenolysis of sulfide and/or auxiliaries in the airtight starting process is reasonably distributed and controlled, the phenomenon of centralized heat release is avoided, and the risks of over-temperature and temperature runaway are reduced. According to the method, obstacles in the industrial application process of the catalyst are thoroughly solved, the use activity of the catalyst is improved, meanwhile, the environment-friendly hidden danger of leakage of a vulcanizing agent is eliminated, and the method has a good application prospect.

Description

technical field [0001] The invention relates to a preparation method for start-up of a hydrotreating device, in particular to a process method for reducing the risk of overtemperature in the airtight process of an external presulfurized type II active center catalyst. Background technique [0002] The hydrogenation process is the process of hydrogenation, high temperature conditions and the action of catalysts to make raw oil hydrodesulfurization, hydrodenitrogenation, polycyclic aromatic hydrocarbons hydrogenation saturation, etc., so as to convert it into clean oil or intermediate blends. The hydrogenation catalysts currently produced in the domestic industry are basically oxidation-type. New catalysts or regenerated catalysts produced in industry contain active metal components (Mo, Ni, Co, W) in the oxidation state (MoO 3 , NiO, CoO, WO 3 ) exists in the form of The practice of basic research and industrial application shows that most of the active metal components of...

Claims

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Application Information

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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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