Method for reducing sulfur content in sulfur-containing light oil

A technology of sulfur content and sulfur content, which is applied in the petroleum industry, hydrocarbon oil treatment, hydrotreating process, etc., to achieve the effects of high yield, simple and environmentally friendly production process, and mild reaction conditions

Inactive Publication Date: 2012-04-04
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] The purpose of the present invention is to provide a new method for reducing the sulfur content of light oil for the hydrodesulfurization process applicable to both whole distillate and heavy distillate sulfur-containing light oil. According to the characteristics of oil products and production requirements, adjust the process conditions to achieve the set goal, and effectively control the saturation of olefins when removing sulfides in light oil to achieve the purpose of reducing the loss of octane number

Method used

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  • Method for reducing sulfur content in sulfur-containing light oil
  • Method for reducing sulfur content in sulfur-containing light oil
  • Method for reducing sulfur content in sulfur-containing light oil

Examples

Experimental program
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Embodiment 1

[0041] A catalytically cracked gasoline is used as feedstock II, and its feedstock properties are shown in Table 1. The whole fraction of FCC gasoline is contacted with hydrodesulfurization catalyst C1 in the primary hydrodesulfurization reactor for selective hydrodesulfurization reaction; the effluent of the primary hydrodesulfurization reactor enters the secondary hydrodesulfurization reactor for hydrogenation The desulfurization catalyst C2 undergoes deep hydrodesulfurization reaction, and the reaction effluent from the secondary hydrodesulfurization treatment reactor enters the product tank after being cooled and separated to obtain gasoline products.

[0042] The specific reaction conditions of the primary hydrodesulfurization reactor and the secondary hydrodesulfurization reactor and the properties of the whole distillate gasoline are shown in Table 3. It can be seen from Table 3 that the sulfur content of the product is 24.3 μg / g, and the octane number loss 0.7, the pro...

Embodiment 2

[0044] A catalytically cracked gasoline is used as feed oil III, and its raw material properties are shown in Table 1. The full fraction FCC gasoline is contacted with hydrodesulfurization catalyst C1 in the primary hydrodesulfurization reactor for selective hydrodesulfurization reaction; the material from the primary hydrodesulfurization reactor enters the secondary hydrodesulfurization reactor and Hydrodesulfurization catalyst C2 carries out deep hydrodesulfurization reaction, and the reaction effluent from the secondary hydrodesulfurization treatment reactor enters the product tank after cooling and separation to obtain gasoline products, with sulfur content of 39.6μg / g, olefin content of 20.5v%, RON The loss is only 0.3, and the product yield is greater than 99%.

Embodiment 3

[0046] A catalytically cracked gasoline is used as raw material IV, and its raw material properties are shown in Table 1. The full fraction FCC gasoline is contacted with hydrodesulfurization catalyst C1 in the primary hydrodesulfurization reactor for selective hydrodesulfurization reaction; the material from the primary hydrodesulfurization reactor enters the secondary hydrodesulfurization reactor and Hydrodesulfurization catalyst C2 carries out deep hydrodesulfurization reaction, and the reaction effluent from the secondary hydrodesulfurization treatment reactor is cooled and separated and then enters the product tank to obtain gasoline products with a sulfur content of 41.9 μg / g and an olefin content of 21.3v%. , RON loss 2.7, product yield greater than 99%.

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Abstract

The invention relates to a method used for reducing the sulfur content in sulfur-containing light oil. The method comprises steps that: a light oil raw material is delivered into a primary hydrodesulfurization processing reactor, and is subject to contact reaction with a hydrodesulfurization catalyst C1; an effluent is delivered into a secondary hydrodesulfurization processing reactor, and is subject to contact reaction with a hydrodesulfurization catalyst C2; an effluent is processed through gas-liquid separation, such that a light oil product with low sulfur content is obtained. According to the invention, a fixed bed reactor structure is adopted in both the primary hydrodesulfurization processing reactor and the secondary hydrodesulfurization processing reactor. The two stages of hydrodesulfurization processing reactors are connected in series. The sulfur-containing light oil is processed through two times of continuous hydrodesulfurization reactions, such that sulfur content is reduced. Hydrodesulfurization is ensured, an alkene reducing phenomenon can be effectively controlled, loss of octane number can be controlled, and the reaction conditions are mild. The hydrogenation-modified light oil product provided by the invention is not required to be processed through alkali washing, the octane number loss of the product is low, and a yield of the product is higher than 99%.

Description

technical field [0001] The invention relates to a method for upgrading light oil, more specifically, relates to a post-treatment method for reducing the sulfur content in light oil and producing low-sulfur or ultra-low-sulfur gasoline blending components. Background technique [0002] With the rapid development of the automobile industry, the air pollution caused by automobile exhaust is particularly serious, and the sulfur compounds and olefins contained in gasoline are the main precursors of harmful emissions. Catalytically cracked gasoline, especially the gasoline obtained by catalytic cracking of heavy oil and residual oil, has a high content of sulfur compounds and olefins, and is the main source of sulfur and olefins in gasoline. The distribution characteristics of sulfur-containing compounds and olefins in FCC gasoline are as follows: sulfur compounds are mainly concentrated in the heavy fraction (HCN), and the sulfur compounds in the light fraction (LCN) are mainly m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/02
Inventor 王祥生靳凤英龙化云
Owner DALIAN UNIV OF TECH
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