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Start-up preparation method of hydro-upgrading device

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

Active Publication Date: 2020-07-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 method for preparing for the start-up of a hydrogenation upgrading device, mainly for the hydrogenation upgrading process

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Embodiment 1

[0045] A hydrogenation unit is equipped with an external presulfidation type II active center hydrogenation upgrading supporting catalyst. The properties of the catalyst are shown in Table 2, and the system design pressure is 10MPa. The start-up process includes:

[0046] (1) Introduce nitrogen into the reaction system, and perform low-pressure airtightness at 1.0Pa and 3.0MPa in turn;

[0047] (2) After the airtightness is qualified, reduce the system pressure to 2.5MPa, introduce hydrogen to keep the pressure constant at 2.8MPa, and then raise the temperature of the catalyst bed to 100°C for 7 hours; the heating rate is 20°C / h;

[0048] (3) Keep the pressure constant, and continue to raise the catalyst bed temperature to 140°C at a rate of ~7°C / h for 7 hours;

[0049] (4) Continue to raise the temperature of the catalyst bed to 170°C at a rate of ~7°C / h, and keep the temperature constant;

[0050] (5) When the temperature of the high-pressure separator is higher than 135°C...

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Abstract

The invention discloses a start-up preparation method of a hydro-upgrading device. According to the method, for the start-up process, particularly the airtight process of an ex-situ prevulcanization type hydrofining catalyst containing a dihydroxy compound and a small-pore-volume ex-situ prevulcanization type hydro-upgrading catalyst, a constant-pressure heating section, a constant-pressure constant-temperature section and a constant-pressure heating section are arranged, so that heat generated by hydrogenolysis of sulfide and / or auxiliaries in the airtight starting process is reasonably distributed, controlled and stably released, the phenomenon of centralized heat release is avoided, and the risks of over-temperature and temperature runaway are reduced. By the method, obstacles in the industrial application process of the combined catalysts are thoroughly solved, the activity of the catalysts is improved, and the environmental protection hidden danger of leakage of a vulcanizing agent is eliminated. The method has a good application prospect.

Description

technical field [0001] The invention relates to a preparation method for starting a hydrogenation upgrading device, in particular to a hydrogenation upgrading airtight method for reducing the risk of overtemperature during 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 mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G49/24
CPCC10G49/24C10G2300/4006C10G2300/4012C10G2300/703
Inventor 王仲义崔哲彭冲唐兆吉曹正凯孙士可
Owner CHINA PETROLEUM & CHEM CORP
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