Catalytic cracking process for preparing high-grade gasoline

A gasoline and heavy gasoline technology, applied in catalytic cracking, cracking, petroleum industry, etc., to improve gasoline quality, reduce cracking reactions, and improve desulfurization effects

Active Publication Date: 2006-11-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] To sum up, there are many technologies related to gasoline upgrading, but the technology of reducing the olefin content and sulfur content in gasoline, ensuring the yield of gasoline after upgrading, and strengthening the conversion of heavy oil has not been reported yet.

Method used

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  • Catalytic cracking process for preparing high-grade gasoline
  • Catalytic cracking process for preparing high-grade gasoline
  • Catalytic cracking process for preparing high-grade gasoline

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] This embodiment illustrates that the method provided by the present invention can obtain a good gasoline upgrading effect, and the gasoline yield is relatively high.

[0042] The feed oil and catalyst entering the cracking reactor are the same as those in Comparative Example 1. The outlet temperature of the riser reactor is 500°C, the lower temperature of the gasoline upgrading riser reaction section is 580°C, and the upper temperature is 490°C, dense phase fluidized bed The bed temperature is 420°C, other operating conditions are listed in Table 3, the product distribution is listed in Table 4, Table 5 lists the properties of gasoline, and the gasoline composition analysis is listed in Table 6.

[0043] Compared with the comparative example, when the raw materials are the same, Example 1 adopts the combined process of the present invention to increase the conversion rate of heavy oil raw materials by 2.30% (to the raw materials), and increase the liquefied gas yield by 2.2...

Embodiment 2

[0045] This embodiment illustrates that the method provided by the present invention can obtain a good gasoline upgrading effect, and the gasoline yield is relatively high.

[0046] The feed oil entering the cracking reactor is the same as that of Comparative Example 1. The outlet temperature of the riser reactor is 505°C, the lower temperature of the gasoline upgrading riser reaction section is 540°C, and the upper temperature is 450°C. The dense fluidized bed layer The temperature is 380°C, other operating conditions are listed in Table 3, the product distribution is listed in Table 4, Table 5 lists the properties of gasoline, and the gasoline composition analysis is listed in Table 6. The catalyst B used in Example 2 is slightly different from the catalyst used in the comparative example, and basically belongs to the same type of catalyst.

[0047]Compared with the comparative example, when the raw materials are the same, Example 2 adopts the combined process of the present inv...

Embodiment 3

[0049] This embodiment illustrates that the method provided by the present invention can obtain a good gasoline upgrading effect, and the gasoline yield is relatively high.

[0050] The feed oil and catalyst entering the cracking reactor are the same as those in Comparative Example 1. The outlet temperature of the riser reactor is 500°C, the lower temperature of the gasoline upgrading riser reaction section is 510°C, and the upper temperature is 420°C, dense phase fluidized bed The bed temperature is 350°C, other operating conditions are listed in Table 3, the product distribution is also listed in Table 4, Table 5 lists the properties of gasoline, and the gasoline composition analysis is listed in Table 6.

[0051] Compared with the comparative example, when the raw materials are the same, Example 3 adopts the combined process of the present invention to increase the conversion rate of heavy oil raw materials by 2.38% (to the raw materials), and increase the liquefied gas yield b...

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Abstract

The catalytic cracking process for producing high quality gasoline includes reaction between preheated material oil in riser reactor via contacting with regenerating catalyst and separating the reaction produced oil and gas; separating the produced gasoline fraction into light gasoline fraction and heavy gasoline fraction; injecting the heavy gasoline fraction into the riser reaction section of the gasoline modifying reactor to react with the cooled regenerating catalyst in catalyst / oil ratio of 4-20 and at 350-500 deg.c, with the produced mixture ascending along the riser reaction section to the fluidized bed reaction section; the reaction between the injected light gasoline fraction with the mixture in catalyst / oil ratio of 2-30 and at 350-450 deg.c, and separating the produced mixture of reacted oil and gas and the catalyst. The process can lower the olefin content and sulfur content in gasoline while ensuring the modified gasoline yield and reinforcing the conversion of heavy oil.

Description

Technical field [0001] The invention belongs to a catalytic cracking method of petroleum hydrocarbons in the absence of hydrogen, and more specifically, is a catalytic cracking method for producing high-quality gasoline. Background technique [0002] As the FCC feedstock oil is getting heavier and heavier and the reaction temperature is getting higher and higher, one of the consequences is the high sulfur content and olefin content of gasoline; on the other hand, due to the continuous improvement of environmental protection requirements, the sulfur The content and olefin content requirements are becoming more and more stringent. The United States and Europe have proposed international uniform standards for the quality of automobile fuels, in which gasoline benzene content is <1%, aromatics content is <35v%, olefin content is <10v%, and sulfur content is <0.003m%. The new gasoline specifications implemented in my country stipulate that the benzene content is 2v%, the a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G11/00
Inventor 侯栓弟李松年龙军张久顺张占柱毛安国鲁维民周健许克家
Owner CHINA PETROLEUM & CHEM CORP
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