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Start-up method for ex-situ prevulcanization secondary activity center hydrogenation catalysts

A technology of external presulfurization and hydrogenation catalyst, which is applied in the fields of start-up of hydroprocessing operation, petroleum industry, hydrocarbon oil cracking, etc., to achieve the effect of simple process, avoiding poisoning, and sufficient and thorough wetting

Active Publication Date: 2012-05-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

No suitable sulfidation method has been determined for the second type of active site hydrogenation catalyst

Method used

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  • Start-up method for ex-situ prevulcanization secondary activity center hydrogenation catalysts

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 100g of pre-sulfurized hydrofining catalyst outside the reactor was loaded into a small reactor, and the airtightness was qualified. The hydrogen partial pressure was adjusted to 6.0MPa, and the temperature was raised at 20°C / h. When the temperature rose to 90°C, the start-up oil was introduced, and the closed-circuit circulation of the device was carried out. The starting oil is straight-run kerosene, the conditions are hydrogen oil volume ratio 350:1, volume space velocity 2.0h -1 . Raise the temperature to 180°C at 20°C / h, keep the temperature constant for 8 hours, continue to raise the temperature to 320°C after finishing the constant temperature, and keep the temperature constant for 2 hours. After the constant temperature is over, switch the raw material oil according to the operation. After switching the feedstock, it was raised to 348°C and operated for 48 hours to analyze the oil samples of the finished product. The catalyst activity results are shown in Table ...

Embodiment 2

[0038] Put 100g of pre-sulfurized hydrofining catalyst outside the reactor into a small reactor, the airtightness is qualified, the hydrogen partial pressure is adjusted to 6.0MPa, and the temperature is raised at 20°C / h, and when it rises to 90°C, start-up oil and hydrogen are introduced, and the device is closed. Circulation, the starting oil is straight-run kerosene, the condition is that the volume ratio of hydrogen to oil is 350:1, and the volume space velocity is 1.5h -1 . Raise the temperature to 180°C at 20°C / h, keep the temperature constant for 8 hours, continue to raise the temperature to 320°C after finishing the constant temperature, and keep the temperature constant for 2 hours. After the constant temperature is over, switch the raw material oil according to the operation. After switching the feedstock, it was raised to 348°C and operated for 48 hours to analyze the oil samples of the finished product. The catalyst activity results are shown in Table 2.

Embodiment 3

[0040] Put 100g of pre-sulfurized hydrofining catalyst outside the reactor into a small reactor, the airtightness is qualified, the hydrogen partial pressure is adjusted to 6.0MPa, and the temperature is raised at 20°C / h, and when it rises to 95°C, start-up oil and hydrogen are introduced, and the device is closed. Circulation, the starting oil is straight-run kerosene, the condition is that the volume ratio of hydrogen to oil is 350:1, and the volume space velocity is 2.0h -1 . Raise the temperature to 180°C at 20°C / h, keep the temperature constant for 8 hours, continue to raise the temperature to 320°C after finishing the constant temperature, keep the temperature constant for 3 hours, and switch the raw material oil according to the operation. After switching the feedstock, it was raised to 348°C and operated for 48 hours to analyze the oil samples of the finished product. The catalyst activity results are shown in Table 2.

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Abstract

The invention discloses a start-up method for ex-situ prevulcanization secondary activity center hydrogenation catalysts, which comprises the following steps that: (1) the ex-situ prevulcanization secondary activity center hydrogenation catalysts are taken; (2) the ex-situ prevulcanization secondary activity center hydrogenation catalysts are filled into a reactor at normal temperature and normal pressure, nitrogen gas is introduced for replacing air in a reaction system, then, hydrogen gas is used for replacing the nitrogen gas, and the hydrogen tightness is carried out; (3) the temperature of a bed layer of the reactor is continuously regulated, start-up activation oil is introduced, and the catalysts are humidified; (4) the start-up activation oil carries out closed loop circulation in the reaction system, and the temperature is continuously raised for completing the start-up activation; and (5) after the activation completion, the bed layer is regulated to the reaction temperature, and raw material oil is switched. The catalyst start-up activation method is favorable for the catalysts to form more secondary hydrogenation active centers, and the use performance of the catalysts is favorably improved.

Description

technical field [0001] The invention relates to a method for starting a hydrogenation catalyst, in particular to a method for starting a hydrogenation catalyst with an external presulfided type II active center. technical background [0002] Due to the slow growth of crude oil production and increasingly heavy quality, the demand for clean oil products in today's world is increasing, and the product quality requirements are becoming more and more stringent. The hydrogenation process of petroleum distillate is the main technology for producing clean oil products at present, and the preparation technology of hydrogenation catalyst is the key of hydrogenation technology. The active metal component of the prepared hydrogenation catalyst is generally in an oxidized state, and before the oxidized state catalyst is used in industry, its active metal must be converted into a sulfurized state to have a high catalytic activity. Therefore, the sulfidation of the catalyst has an import...

Claims

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Application Information

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IPC IPC(8): C10G45/08C10G45/00C10G47/12C10G49/24
Inventor 陈光高玉兰王继锋徐黎明李崇慧
Owner CHINA PETROLEUM & CHEM CORP
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