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

A technology of hydrogenation catalyst and external presulfurization, which is applied in the fields of start-up of hydroprocessing operation, petroleum industry, hydrocarbon oil cracking, etc. It can solve problems such as heating furnaces, reduce equipment investment, improve catalytic performance, and solve low-temperature heating The effect of the heat source problem

Active Publication Date: 2014-05-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This catalyst start-up vulcanization method is conducive to the formation of more second-type hydrogenation active centers on the catalyst, which is conducive to improving the performance of the catalyst, but a heating furnace is required during the start-up process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The EPFF-46 catalyst is loaded into the reactor, which is airtight with nitrogen and hydrogen, and the system pressure is 14.0MPa. The reaction system is not equipped with a heating furnace or a start-up furnace.

[0043] After the airtightness of the device is qualified, the working load of the circulating hydrogen compressor is reduced to 5% of its maximum working load, and the temperature of the catalyst bed is raised to 60°C; the start-up activation oil is introduced, and the volume space velocity is 0.5h -1 , and adjust the load of the circulating hydrogen compressor to 80% of the maximum working load to wet the catalyst bed; the start-up activation oil circulates in a closed circuit in the reaction system, and uses steam to exchange heat for the start-up activation oil at a rate of 10°C / h Raise the catalyst bed temperature to 180°C; add 10% olefin-rich naphtha fraction to the start-up activation oil, and continue to increase the catalyst bed temperature to 350°C at...

Embodiment 2

[0045] The EPFF-46 catalyst is loaded into the reactor, which is airtight with nitrogen and hydrogen, and the system pressure is 14.0MPa. The reaction system is not equipped with a heating furnace or a start-up furnace.

[0046] After the airtightness of the device is qualified, the working load of the circulating hydrogen compressor is reduced to 2% of its maximum working load, and the temperature of the catalyst bed is raised to 80°C; the start-up activation oil is introduced, and the volume space velocity is 0.8h -1 , and adjust the load of the circulating hydrogen compressor to the maximum working load of 70% to wet the catalyst bed; the start-up activation oil circulates in a closed circuit in the reaction system, and uses steam to exchange heat for the start-up activation oil at a rate of 10°C / h Raise the catalyst bed temperature to 190°C; add 10% olefin-rich naphtha fraction to the start-up activation oil, and continue to increase the catalyst bed temperature to 320°C at...

Embodiment 3

[0048] The EPFF-46 catalyst is loaded into the reactor, which is airtight with nitrogen and hydrogen, and the system pressure is 14.0MPa. The reaction system is not equipped with a heating furnace or a start-up furnace.

[0049] After the airtightness of the device is qualified, the working load of the circulating hydrogen compressor is reduced to 0% of its maximum working load, and the temperature of the catalyst bed is raised to 130°C; the start-up activation oil is introduced, and the volume space velocity is 0.8h -1 , and adjust the load of the circulating hydrogen compressor to 80% of the maximum working load to wet the catalyst bed; the start-up activation oil circulates in a closed circuit in the reaction system, and uses steam to exchange heat for the start-up activation oil at a rate of 10°C / h Raise the catalyst bed temperature to 190°C; add 15% olefin-rich naphtha fraction to the start-up activation oil, and continue to increase the catalyst bed temperature to 320°C a...

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Abstract

The invention discloses a start-up method for an ex-situ prevulcanization secondary activity center hydrogenation catalyst. After resistance to air loss of a device is qualified, circulating hydrogen compressor working load is adjusted to 0-20% of a maximum load, the catalyst reacts at a low temperature to release heat; when the bed layer temperature rise to 60-150 DEG C, start-up activation oil is introduced, the circulating hydrogen compressor working load is adjusted to 60-100% of the maximum load for wetting of the catalyst; the start-up activation oil is cycled in a reaction system closed path, the catalyst bed temperature is risen to 180 to 230 DEG C by heat exchange; a proper amount of olefin-enriched naphtha is added into the start-up activation oil, the catalyst bed temperature is risen to 300-380 DEG C to complete start-up activation. The start-up method, in the premise of no influence on the use properties of the secondary activity center hydrogenation catalyst, can better use the catalyst characteristics, reduce the device energy consumption, and reduce the device investment cost, and the start-up process can be simplified.

Description

technical field [0001] The invention relates to a start-up method of an external presulfurized hydrogenation catalyst of a second-type 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 important influence on the performance of the catalyst and is an imp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G45/08C10G45/00C10G47/12C10G49/24
Inventor 陈光吴子明曾榕辉石友良黄新露高玉兰
Owner CHINA PETROLEUM & CHEM CORP
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