Catalytically cracked gasoline desulphurization method

A technology for catalytically cracking gasoline and gasoline, which is applied in the petroleum industry, processing hydrocarbon oil, and hydrocarbon oil processing products, etc. The effect of saturation, reduced depth, reduced saturation rate

Inactive Publication Date: 2016-06-15
SHANDONG LIANXING ENERGY GRP CO LTD
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Problems solved by technology

However, due to the difficulty of hydrotreating FCC raw materials, new high-pressure devices need to be built and operated under high severity, and the investment and operating costs are high, so it is rarely used at present.
By improving the FCC process and using desulfurization additives, only partial desulfurization can be achieved, and it is not enough to solve the problem of deep desulfurization without other measures

Method used

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  • Catalytically cracked gasoline desulphurization method

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Embodiment Construction

[0012] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0013] refer to figure 1 , the present embodiment adopts the following technical solutions: catalytic cracking gasoline desulfurization method, which includes the following steps: 1. Selecting a suitable cutting point according to the raw material properties and product objectives carries out fraction cutting from the full fraction catalytic cracking stable gasoline of the catalytic cracking unit; 2. 1. Heavy distillate gasoline HCN removes sulfide in a fixed bed hydrodesulfurization reactor; 3. Light distillate gasoline LCN is blended with hydrogenated heavy fraction after pre-alkali washing in the demercaptan unit, and then oxidatively desulfurized by fixed bed Alcohol process to obtain refined catalytic cracked gasoline.

[0014] It is worth n...

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Abstract

The invention discloses a catalytically cracked gasoline desulphurization method. The method comprises 1, according to raw material properties and product targets, selecting an appropriate cut point and carrying out fraction cutting on whole-fraction catalytically cracked stable gasoline from a catalytically cracking device, 2, removing sulfides of heavy fraction gasoline HCN in a fixed bed hydrodesulfurization reactor, and 3, carrying out caustic pre-washing on the light fraction gasoline LCN through a mercaptan removal unit, blending the light fraction gasoline LCN and the heavy fraction subjected to hydrogenation, and carrying out fixed-bed oxidation mercaptan removal to obtain refined catalytically cracked gasoline. The method greatly reduces a gasoline olefin saturation ratio, greatly reduces catalytically cracked gasoline heavy fraction hydrodesulfurization depth and reduces alkene hydrogenation saturation.

Description

technical field [0001] The invention relates to the technical field of gasoline desulfurization, in particular to a catalytic cracking gasoline desulfurization method. Background technique [0002] Desulfurization of FCC gasoline includes raw material pretreatment, process desulfurization and FCC gasoline post-treatment. Among them, FCC raw material pretreatment can fundamentally solve the problem of gasoline sulfur content, and has significant advantages in terms of long-term benefits. However, due to the difficulty of hydrotreating FCC feedstock, new high-pressure devices need to be built and operated under high severity, and the investment and operation costs are high, so it is rarely used at present. By improving the FCC process and using desulfurization additives, only partial desulfurization can be achieved, and it is not enough to solve the problem of deep desulfurization without taking other measures. [0003] Therefore, it is necessary to design a desulfurization ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/00
CPCC10G67/00C10G2300/1037C10G2400/02
Inventor 车春玲
Owner SHANDONG LIANXING ENERGY GRP CO LTD
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