Method for reducing gasoline sulfur content

A sulfur content, gasoline technology, applied in the petroleum industry, processing hydrocarbon oil, hydrocarbon oil treatment products, etc., can solve the problems of large octane number loss, increase in octane number loss, and increase in the proportion of heavy gasoline, and achieve octane The effects of small loss value, reduced energy consumption and operating costs, and increased effective utilization

Active Publication Date: 2018-05-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] 1. The olefins in the raw material contribute a lot to the octane number, and the saturation of the olefins causes a large loss of the octane number;
[0014] 2. High sulfur content requires deep hydrodesulfurization, resulting in high olefin saturation;
[0015] 3. When producing National V gasoline, the cutting ratio of light and heavy gasoline is adjusted forward, resulting in an increase in the proportion of

Method used

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  • Method for reducing gasoline sulfur content
  • Method for reducing gasoline sulfur content

Examples

Experimental program
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Effect test

Embodiment 1

[0118] This embodiment adopts figure 2 The process shown in Table 1 desulfurizes gasoline feedstock E. The gasoline raw material E is a kind of catalytic cracking gasoline.

[0119] Gasoline raw material E is first cut into light fraction, middle fraction and heavy fraction in the fractionating tower, wherein the cut point temperature of the light fraction and the middle fraction is 60°C, the cut point temperature of the middle fraction and the heavy fraction is 100°C, and the light fraction The yield was 25% by weight, the yield of the middle fraction was 30% by weight, and the yield of the heavy fraction was 45% by weight.

[0120] In the solvent extraction unit, the middle fraction is subjected to solvent extractive distillation in a solvent extraction column:

[0121] In the solvent extraction tower: the feed weight ratio of poor solvent to middle distillate is 3:1, the temperature at the bottom of the tower is 170°C, the temperature at the top of the tower is 80°C, the...

Embodiment 2

[0134] This embodiment adopts figure 2 The process flow shown is for desulfurization treatment of the gasoline feedstock F in Table 1. The gasoline feedstock F is a catalytic cracking gasoline.

[0135] The gasoline raw material F is first cut into light fraction, middle fraction and heavy fraction in the fractionating tower, wherein the cut point temperature of the light fraction and the middle fraction is 60°C, the cut point temperature of the middle fraction and the heavy fraction is 120°C, and the light fraction The yield was 25% by weight, the yield of the middle fraction was 35% by weight, and the yield of the heavy fraction was 40% by weight.

[0136] In the solvent extraction unit, the middle fraction is subjected to solvent extractive distillation in a solvent extraction column:

[0137] In the solvent extraction tower: the feed weight ratio of poor solvent to middle distillate is 4:1, the temperature at the bottom of the tower is 150°C, the temperature at the top ...

Embodiment 3

[0150] This embodiment adopts figure 1 The process shown in Table 1 desulfurizes the gasoline feedstock G. The gasoline raw material G is a kind of catalytic cracking gasoline.

[0151] Gasoline raw material G is first cut into light fraction, middle fraction and heavy fraction in the fractionating tower, wherein the cut point temperature of light fraction and middle fraction is 100°C, the cut point temperature of middle fraction and heavy fraction is 120°C, and the light fraction The yield was 50% by weight, the yield of the middle fraction was 15% by weight, and the yield of the heavy fraction was 35% by weight.

[0152] In the alkali cleaning unit, the volume ratio of the mixed fraction formed by the light distillate and raffinate is 8:2 when in contact with the lye, the temperature is 30°C, and the pressure is 0.6MPa to obtain the sweetened light distillate.

[0153] In the solvent extraction unit, the sweetened light and middle fractions are subjected to solvent extract...

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Abstract

Relating to the field of hydrocarbon oil refining, the invention discloses a method for reducing the gasoline sulfur content. The method includes: fractionating a gasoline raw material into light fraction gasoline, medium fraction gasoline and heavy fraction gasoline, letting the light fraction gasoline firstly enter an alkaline extraction unit for removal of mercaptan, then mixing the mercaptan removed light fraction gasoline with medium gasoline fraction, and letting the mixture enter a solvent extraction unit; or letting the medium gasoline fraction firstly enter the solvent extraction unit, then mixing the obtained product and the light gasoline fraction, and subjecting the mixture to the alkaline extraction unit; letting the extract oil obtained by the solvent extraction unit and theheavy fraction gasoline enter a first reaction zone and a second reaction zone in order, and separating the reaction effluent of the second reaction zone to obtain hydrogenated heavy fraction gasoline; and mixing the treated light gasoline fraction and the medium gasoline fraction with the hydrogenated heavy fraction gasoline so as to obtain a gasoline product. The gasoline product obtained by themethod provided by the invention has the advantages of low sulfur content, small octane loss value and high gasoline yield.

Description

technical field [0001] The invention relates to the field of refined hydrocarbon oil, in particular to a method for reducing the sulfur content of gasoline, and more specifically to a method for reducing the sulfur content in high-sulfur and high-olefin gasoline raw materials to produce ultra-low sulfur gasoline. Background technique [0002] With the rapid increase of the number of automobiles in our country, the problem of air pollution caused by automobile exhaust emissions is becoming more and more serious. [0003] The pollutants emitted by automobile exhaust mainly include SOx and NOx. Such pollutants will not only cause acid rain, but also destroy the ozone layer, and NOx can also cause cancer in the human body, causing great harm to humans and the environment. Sulfur in gasoline can poison automobile exhaust gas purification catalysts, seriously affecting its ability to treat exhaust pollutants. Therefore, countries all over the world have formulated more and more ...

Claims

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Application Information

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IPC IPC(8): C10G67/02
CPCC10G67/02C10G2300/202C10G2400/02
Inventor 习远兵张登前屈锦华唐文成潘光成褚阳
Owner CHINA PETROLEUM & CHEM CORP
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