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Technical method for grading catalyst in conversion process of catalytic diesel oil

A conversion process and catalytic diesel technology, applied in the direction of physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problem of reducing hydrogenation saturation of gasoline components, strong saturation ability of gasoline components, unfavorable hydrogenation conversion production High-octane gasoline and other problems, to increase the effect of secondary cracking

Active Publication Date: 2017-10-31
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method cannot selectively reduce the hydrogenation saturation of gasoline components, so the octane number loss of gasoline products is relatively large
[0005] EP20110834653 discloses a method for preparing a polycyclic aromatic hydrocarbon hydrogenation conversion catalyst. The catalyst carrier is composed of β molecular sieve and pseudo-boehmite. The active metal components of Group VIB and Group VIII are added by conventional methods, but the catalyst is also Strong saturation ability for gasoline components, which is not conducive to the process of catalytic diesel hydrogenation conversion to produce high-octane gasoline

Method used

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  • Technical method for grading catalyst in conversion process of catalytic diesel oil
  • Technical method for grading catalyst in conversion process of catalytic diesel oil
  • Technical method for grading catalyst in conversion process of catalytic diesel oil

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Experimental program
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Effect test

Embodiment 1

[0029] Preparation method and physical and chemical properties of molecular sieve 1:

[0030] (1) Take 200g of NaY molecular sieve raw powder prepared in the laboratory, mix it with ammonium nitrate with a concentration of 1.5mol / L according to the liquid-solid ratio of 4:1, exchange at 80°C for 2 hours, repeat this process twice, and the exchanged Y molecular sieve Na content in Na 2 O is calculated as 2.5%;

[0031] (2) Hydrothermally treat the Y molecular sieve obtained in step (1) at 560°C and 0.1MPa for 2 hours;

[0032] (3) The molecular sieve obtained in step (2) was stirred and mixed with distilled water according to the liquid-solid ratio of 5:1, and then the temperature was raised to 75°C. During the stirring process, 400ml of 0.6mol / L aluminum sulfate solution was added, and the reaction was carried out at constant temperature for 2 hours.

[0033] (4) First dry the molecular sieve obtained in step (3) at 120°C for 3 hours, then soak the molecular sieve obtained i...

Embodiment 2

[0038] Molecular sieve 2 modification process:

[0039] (1) Take 200g of NaY molecular sieve raw powder prepared in the laboratory, mix it with ammonium nitrate with a concentration of 0.6mol / L according to the liquid-solid ratio of 3:1, exchange at 80°C for 3 hours, repeat this process 3 times, and the exchanged Y molecular sieve Na content in Na 2 O is calculated as 2.0%;

[0040] (2) Hydrothermally treat the Y molecular sieve obtained in step (1) at 530°C and 0.1Mpa for 2 hours;

[0041] (3) Step (2) sieve the oxalic acid solution (concentration in H + Total) 400ml mixed, then heated up to 50°C, and reacted at constant temperature for 2 hours;

[0042] (4) The molecular sieve obtained in step (3) was stirred and mixed with distilled water according to the liquid-solid ratio of 5:1, and then the temperature was raised to 80°C. During the stirring process, 400ml of 0.5mol / L aluminum sulfate solution was added, and the reaction was carried out at constant temperature for 2 ...

Embodiment 3

[0050] Preparation method and physical and chemical properties of molecular sieve 3:

[0051] The Y molecular sieve is modified by conventional methods, that is, the NaY molecular sieve is first ammonium-exchanged to Na 2 The O content is 2.0%, and then mixed with 0.10mol / L ammonium fluorosilicate solution according to the liquid-solid ratio of 10:1 and heated to 80°C, then reacted at a constant temperature for 2 hours. After being treated with ammonium fluorosilicate, the sample was filtered and washed at 0.1 Molecular sieve 3 was obtained by hydrothermal treatment at MPa and 540° C. for 2 h. Molecular sieve 3 has a silicon to aluminum ratio of 15.0. XRD analysis results show that its unit cell constant is 2.442 and its relative crystallinity is 92%. The pore volume is 0.36ml / g, and the infrared acid content determined by infrared analysis is 0.93mmol / g.

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Abstract

The invention discloses a technical method for grading a catalyst in a conversion process of catalytic diesel oil. The method comprises the following steps: (1) firstly, putting a mixture of catalytic diesel oil and hydrogen into a hydrogenation reactor and performing hydrofining reaction; (2) guiding the hydrofining reaction effluent to directly enter a cracking reactor and generating contact reaction with hydrocracking catalyst layers filled in the cracking reactor, wherein the hydrocracking catalyst taking Mo-Co as active metal components is used on the upper layer of the two hydrocracking catalyst layers in the hydrocracking reactor and the hydrocracking catalyst taking Mo-Ni or W-Ni as active metal components is used on the lower layer; (3) separating and fractionally distilling the hydrocracking reaction effluent, thereby acquiring a naphtha component and a diesel oil component. The method disclosed by the invention can increase the device liquid yield, can reduce the hydrogenation saturation of the generated gasoline component and can increase the octane value of the gasoline component under the condition of meeting the requirement for the conversion rate of catalytic diesel oil.

Description

technical field [0001] The invention relates to a hydrocarbon hydrogenation treatment method, in particular to a catalyst gradation process method in a catalytic diesel conversion process. Background technique [0002] Since the beginning of the new century, with the increasing awareness of environmental protection, the stricter national environmental protection regulations and the rapid development of the national economy, the demand for clean motor fuels has been increasing all over the world. Catalytic cracking (FCC) technology is one of the main technological means for lightening heavy oil, and it occupies a relatively important position in oil refining enterprises all over the world. The annual processing capacity of catalytic cracking units in my country has exceeded 100 million tons, second only to the United States. In the composition of gasoline and diesel products, catalytic cracking gasoline accounts for about 80%, and catalytic diesel oil accounts for about 30%....

Claims

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Application Information

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IPC IPC(8): C10G67/02B01J29/16B01J29/78
CPCB01J29/166B01J29/7815B01J2229/18C10G67/02C10G2300/70
Inventor 柳伟杜艳泽秦波高杭张晓萍董立廷贝耀明
Owner CHINA PETROLEUM & CHEM CORP
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