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Deep desulfurization hydrotreatment method of diesel oil

A deep desulfurization and hydrogenation treatment technology, which is applied in the treatment of hydrocarbon oil, petroleum industry, refining to remove heteroatoms, etc., can solve the problems of inability to achieve deep desulfurization, reduce steric hindrance effect, improve utilization rate, and easy desulfurization The effect of removing

Active Publication Date: 2020-04-28
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can not always achieve the purpose of deep desulfurization

Method used

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  • Deep desulfurization hydrotreatment method of diesel oil
  • Deep desulfurization hydrotreatment method of diesel oil
  • Deep desulfurization hydrotreatment method of diesel oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] This example provides a catalyst gradation combination and the preparation process of the gradation catalyst. Catalyst gradation scheme is adopted, the catalyst is loaded in the reactor, and the bed is filled with sulfurized hydrogenation catalyst I, sulfurized hydrogenation catalyst II and sulfurized hydrogenation catalyst III from top to bottom.

[0034] The preparation method of sulfided hydrogenation catalyst Ⅰ is as follows: the carrier Ⅰ is used to contain MoO 3 The catalyst precursor was obtained by supersaturated impregnation of the active components of NiO, which was dried at 200°C for 4h, heated to 600°C at 5°C / min, and roasted at constant temperature for 4.0h to obtain the desired catalyst. The catalyst MoO 3 is 20.01%, NiO is 3.8%; the specific surface area is 189m 2 / g, the pore volume is 0.35ml·g -1 . Load the catalyst into the vulcanization reactor, introduce sulfurized oil into it, and wet the catalyst bed; then adjust the bed temperature to 150°C, a...

Embodiment 2

[0038] This example presents a preparation process of a catalyst graded combination.

[0039] The preparation method of sulfided hydrogenation catalyst Ⅰ is as follows: the carrier Ⅰ is used to contain MoO 3 , NiO active components were supersaturated impregnated to obtain a catalyst precursor, which was dried at 300°C for 5h, heated to 550°C at 4°C / min, and roasted at constant temperature for 4.5h to obtain the desired catalyst. The catalyst MoO 3 is 22.5%, NiO is 4.1%; the specific surface area is 198m 2 / g, the pore volume is 0.37ml g -1 . Load the catalyst into the vulcanization reactor, introduce sulfurized oil into it, and wet the catalyst bed; then adjust the bed temperature to 170°C, and inject the vulcanizing agent; after the hydrogen sulfide penetrates the catalyst bed, the catalyst bed The bed temperature was raised to 270°C at a rate of 3°C / h and kept at a constant temperature for 8 hours; the temperature of the catalyst bed was raised to 350°C at a rate of 5°C...

Embodiment 3

[0043] This example presents a preparation process of a catalyst graded combination.

[0044] The preparation method of sulfided hydrogenation catalyst Ⅰ is as follows: the carrier Ⅰ is used to contain MoO 3 , NiO active components were supersaturated impregnated to obtain a catalyst precursor, which was dried at 300°C for 5h, heated to 550°C at 4°C / min, and roasted at constant temperature for 4.5h to obtain the desired catalyst. The catalyst MoO 3 is 22.5%, NiO is 3.7%; the specific surface area is 179m 2 / g, the pore volume is 0.36ml g -1. Load the catalyst into the vulcanization reactor, introduce sulfurized oil into it, and wet the catalyst bed; then adjust the bed temperature to 170°C, and inject the vulcanizing agent; after the hydrogen sulfide penetrates the catalyst bed, the catalyst bed The bed temperature was raised to 260°C at 5°C / h and kept constant for 9.0 hours; the catalyst bed temperature was raised to 360°C at 10°C / h and kept at constant temperature for 9 ...

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Abstract

The invention discloses a deep desulfurization hydrotreatment method of diesel oil. The method comprises the following steps that a diesel oil raw material enters a hydrogenation reactor and contactsa hydrogenation catalyst bed layer to carry out a hydrogenation reaction, and the reaction product flows out of the reactor, wherein the hydrogenation catalyst bed layer is filled with at least two stages of vulcanization-state hydrogenation catalysts in a grading manner along the material flow direction, the metal active phase crystal lengths of each stage of the vulcanization-state hydrogenationcatalyst are increased stage by stage along the material flow direction, and the lamellar crystal layer number is reduced stage by stage. According to the catalyst grading method disclosed by the invention, the matching reaction of the molecular size and structure of the reactants in each section and an active phase structure can be fully realized so as to effectively utilize the active center ofthe catalyst, improve the coupling reaction performance of the active center structure and the molecular structure, substantially improve the desulfurization activity and the stability of the whole system on reactants, significantly improve the desulfurization depth of diesel oil and produce ultralow-sulfur diesel oil.

Description

technical field [0001] The invention relates to a deep desulfurization and hydrogenation treatment method for diesel oil. Background technique [0002] With the continuous acceleration of oil product quality upgrades, China has begun to fully implement the National V gasoline and diesel standards, requiring the sulfur content in oil products to be reduced to below 10 μg / g. In the near future, the National VI gasoline and diesel standards will be implemented soon. The research results show that: upgrading from China IV to China V standard, the depth of desulfurization will be greatly improved, and the deactivation of hydrogenation catalyst will be significantly accelerated. This problem will become more prominent in the process of upgrading China VI diesel oil, and the pressure on domestic oil refining enterprises will further escalate. Therefore, the long-term stable production of ultra-low sulfur clean diesel oil under the condition of inferior raw materials has become a s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G45/08
CPCC10G45/08C10G2300/1037C10G2300/202
Inventor 吕振辉彭绍忠杨占林薛冬
Owner CHINA PETROLEUM & CHEM CORP
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