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A combined hydroprocessing-catalytic cracking process

A catalytic cracking and hydrotreating technology, which is applied in hydrotreating process, hydrocarbon oil treatment, petroleum industry, etc., can solve the problem of high sulfur content in catalytic gasoline, achieve the goal of improving quality and yield, excellent product quality and reducing SOx The effect of content

Active Publication Date: 2016-01-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This combined process solves the problems of high coke yield and poor diesel quality, but requires a separate hydrogenation unit, and does not solve the problem of high sulfur content in catalytic gasoline

Method used

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  • A combined hydroprocessing-catalytic cracking process
  • A combined hydroprocessing-catalytic cracking process
  • A combined hydroprocessing-catalytic cracking process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The wax oil raw material G and the catalytic cycle oil are mixed and then enter the hydrotreating reaction zone, and successively contact and react with the hydroprotecting agent A, hydrogen protecting agent B, hydrodesulfurizing agent C and hydrotreating catalyst E. The loading volume of the above catalysts The ratio is 4:4:20:72. By adopting the process flow shown in the accompanying drawing, the obtained hydrogenated tail oil is a fraction greater than 165°C. The distillation range of the obtained catalytic light oil is 190°C-270°C, the content of single-ring aromatics is 51% by mass, and it is self-circulated back to the catalytic cracking unit. The distillation range of the catalytic cycle oil is 270°C to 460°C fraction, the content of aromatic hydrocarbons above double rings is 69% by mass, and the catalytic cycle oil is returned to the hydrotreating reaction zone.

[0039] Table 2, Table 3 and Table 4 are the process parameters, product distribution and product ...

Embodiment 2

[0041] The wax oil raw material H and the catalytic cycle oil are mixed and then enter the hydrotreating reaction zone, and successively contact and react with the hydrogenation protecting agent A, the hydrogenation protecting agent B, the hydrodemetallization agent D and the hydrotreating catalyst E, and the loading of the above catalysts The volume ratio is 5:5:15:75. By adopting the process flow shown in the accompanying drawing, the obtained hydrogenated tail oil is a fraction greater than 165°C. The distillation range of the obtained catalytic light diesel oil is 190°C-255°C, the content of single-ring aromatics is 62% by mass, and it is self-circulated back to the catalytic cracking unit. The distillation range of the catalytic cycle oil is 255°C-460°C fraction, the content of aromatic hydrocarbons above double rings is 65% by mass, and the catalytic cycle oil is returned to the hydrotreating reaction zone.

[0042] Table 2, Table 3 and Table 5 are the process parameter...

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PUM

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Abstract

Provided is a hydrotreatment-catalytic cracking combination process method. Wax oil and catalytic cracking circulation oil go to a hydrotreatment reaction zone together, and are subjected to reactions of hydrodemetallization, hydrodesulfurization, hydrodenitrification, aromatic hydrogenation saturation and the like in the presence of hydrogen and hydrogenation catalysts. The obtained hydrogenated tail oil goes to a catalytic cracking device, a cracking reaction is carried out in the presence of catalytic cracking catalysts. Dry gases, liquefied gases, catalytic cracking gasoline, catalytic cracking light diesel oil, catalytic cracking circulation oil and slurry oil are obtained after separation, the catalytic cracking light diesel oil is subjected to self-circulation in the catalytic cracking device and the catalytic cracking circulation oil is circulated to the hydrotreatment reaction zone. The method can raise yield and quality of gasoline products greatly.

Description

technical field [0001] The present invention belongs to a method for treating hydrocarbon oil with a hydrotreating process and another conversion step, more specifically, a method for producing high-value gasoline with a combined hydrotreating-catalytic cracking process. Background technique [0002] With the increasing scarcity of crude oil resources and the aggravation of heavy and inferior crude oil, how to effectively use limited resources to produce light products in a large amount has become the goal pursued by various refinery technology developers, which can improve the yield and quality of target products. Refining technology has become the choice of many refineries. [0003] In my country, catalytic cracking has been widely used due to its good operational flexibility, high gasoline yield and low one-time investment. A single catalytic cracking process has certain requirements for catalytic raw materials. Raw materials with high sulfur content not only make SOx em...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G69/04
Inventor 张毓莹蒋东红许友好龚剑洪龙湘云任亮胡志海聂红
Owner CHINA PETROLEUM & CHEM CORP
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