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Preparation method for start-up of hydrotreating unit

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., to achieve high practicability and environmental protection advantages, reduce use conditions, and increase the effect of total consumption time

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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  • Preparation method for start-up of hydrotreating unit
  • Preparation method for start-up of hydrotreating unit
  • Preparation method for start-up of hydrotreating unit

Examples

Experimental program
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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 start-up preparation method of a hydrotreating device. The method is aimed at the start-up process of the pre-sulfurized hydrotreating catalyst outside the device containing carboxyl compounds, especially the airtight process. A constant pressure and temperature rising section, a constant pressure and constant temperature section and a constant pressure and temperature rising section are set up, and the airtight start-up process sulfide and / or the heat generated by the hydrogenolysis of additives is reasonably distributed and controlled to avoid the occurrence of concentrated exothermic phenomena and reduce the risk of overheating and overheating. The method completely solves the obstacles in the industrial application process of the catalyst, not only improves the activity of the catalyst, but also eliminates the hidden danger of environmental protection of the vulcanizing agent leakage, and 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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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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