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Hydrogenation modification method for catalytically cracked gasoline

A technology for catalytic cracking gasoline and hydro-upgrading, which can be used in gasoline stabilization, refining to remove heteroatoms, etc., and can solve problems such as unsatisfactory gasoline yield.

Active Publication Date: 2009-02-18
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The sulfur content of gasoline produced by this method is reduced to 200ppm, and the gasoline yield is not ideal

Method used

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  • Hydrogenation modification method for catalytically cracked gasoline
  • Hydrogenation modification method for catalytically cracked gasoline
  • Hydrogenation modification method for catalytically cracked gasoline

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specific Embodiment approach

[0035] The method provided by the present invention will be further described below in conjunction with the accompanying drawings. However, the invention is not limited thereby.

[0036] The accompanying drawing is a schematic diagram of the method for desulfurization and olefin reduction while maintaining the octane number provided by the present invention.

[0037] The flow of the method is as follows:

[0038] The gasoline raw material enters the fractionating tower 2 through the pipeline 1 and is cut into light gasoline fraction and heavy gasoline fraction, wherein the light gasoline fraction enters the washing reduction unit 5 through the pipeline 3, the light gasoline fraction after alkali washing is drawn out through the pipeline 6, and the heavy gasoline fraction passes through the pipeline 4 After entering the pump 7, the heavy gasoline fraction after boosting is mixed with the hydrogen-rich gas from the pipeline 22 through the pipeline 8, and then enters the fixed-b...

Embodiment 1

[0042] Using FCC gasoline A as the raw material, first cut the raw material, the cutting point is 75°C, the heavy gasoline fraction accounts for 61% by weight of the raw material oil, and its properties are shown in Table 1. The heavy gasoline fraction, hydrogen and hydrotreating catalyst FF-11 The hydrogenation reaction is carried out by contact, and the hydrogenated heavy gasoline fraction is reconciled with the sweetened light gasoline fraction to obtain gasoline products. The hydrogenation process conditions and product properties are shown in Table 2.

Embodiment 2

[0044] FCC gasoline A was used as the raw material to cut according to the method described in Example 1, and the heavy gasoline fraction and hydrogen were contacted with hydrotreating catalyst FF-11 and octane recovery catalyst to perform hydrotreating and octane recovery reactions. The heavy gasoline fraction after hydrogenation is blended with the light gasoline fraction after sweetening to obtain gasoline products. The process conditions and product properties are shown in Table 2.

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Abstract

The invention relates to a hydro-upgrading method for catalytic cracking gasoline; the method comprises the following steps: gasoline whole fraction is cut into light fraction and heavy fraction; the cutting point is 60 DEG C to 80 DEG C; mercaptan in the light gasoline fraction is removed through mercaptan removal alkali washing; the heavy gasoline fraction and hydrogen gas have catalytic hydrodesulfurization, denitrogenation and olefin saturated reaction; reactor effluent or the reactor effluent after removing hydrogen sulfide is contacted with octane value restore catalyzer, and isomerization, aromatizatian and building up reaction are implemented, hydrogenated oil is separated and lighter hydrocarbon gasoline fraction is obtained, hydrogen-rich gas at the top of a high partial tank is circularly used through hydrogen sulfide removal, and lighter hydrocarbon at the top of a stabilizer tower is feedback to a fractionation tank to be fractionated again; the condition of the hydrotreating reaction is that hydrogen partial pressure is 1.5 to 3.0 MPa; the reaction temperature is 250 to 320 DEG C; the liquid hourly space velocity is 3.0 to 5.0 h<-1>, and the hydrogen-oil ratio is 200 to 500 Nm<3> / m<3>; the sulfur content of the gasoline product is smaller than 100 ppm, the octane value is unchanged, and the yield of gasoline reaches 98.5 weight percent.

Description

technical field [0001] The invention relates to a hydrogenation and upgrading method for high-sulfur, high-olefin, and high-octane FCC gasoline in the presence of hydrogen. Background technique [0002] my country's gasoline has high sulfur content and olefin content. The reason for the high content of sulfur and olefins in gasoline is that the proportion of catalytic cracking (FCC) gasoline in the gasoline pool is too high, and it is very difficult to achieve the standard that the olefin content of gasoline is less than 20%. In order to meet the requirements of clean gasoline specifications, the content of olefins needs to be greatly reduced. Olefins are an important component of the source of octane number of FCC gasoline, and a large reduction in content of olefins will lead to a significant decrease in the octane number of FCC gasoline. Using conventional hydrorefining process to upgrade FCC gasoline, the octane number loss of gasoline can reach more than ten units. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G45/04C10G7/02
Inventor 崔德强霍东亮陈冬梅张成涛张鹛允赵悦
Owner BC P INC CHINA NAT PETROLEUM CORP
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