Method for producing ultralow-sulfur gasoline

An ultra-low sulfur gasoline technology, applied in the petroleum industry, hydrocarbon oil treatment, hydrotreating process, etc., to achieve the effects of reducing olefin saturation rate, reducing device energy consumption, and reducing waste lye discharge

Active Publication Date: 2016-11-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that this method is only suitable for hydrodesulfurization and sweetening of gasoline with a sulfur content of less than 700 μg / g

Method used

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  • Method for producing ultralow-sulfur gasoline
  • Method for producing ultralow-sulfur gasoline
  • Method for producing ultralow-sulfur gasoline

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The same raw material oil F1 as in Comparative Example 1 was used. The feed oil F1 is first cut into light gasoline fraction and heavy gasoline fraction in fractionation unit, wherein the proportion of light gasoline fraction is 35% by weight, and the proportion of heavy gasoline fraction is 65% by weight. Alkaline extraction sweetening of light gasoline fraction. Heavy gasoline fractions undergo selective hydrodesulfurization. The first hydrogenation reactor is filled with fresh catalyst C1, the second hydrogenation reactor is filled with fresh catalyst C2, and the third reactor is filled with fresh catalyst C3. The catalyst in each reactor is sulfided. After the sulfidation is completed, the heavy fraction of the raw material oil F1 is mixed with hydrogen and enters the first and second hydrogenation reactors to contact with catalysts C1 and C2, respectively, to carry out selective hydrodediene reaction and selective hydrodesulfurization reaction; The effluent from...

Embodiment 2

[0056] The same raw material oil F2 as in Comparative Example 2 was used. The feed oil F2 is first cut into light gasoline fraction and heavy gasoline fraction in fractionation unit, wherein the proportion of light gasoline fraction is 30% by weight, and the proportion of heavy gasoline fraction is 70% by weight. Alkaline extraction sweetening of light gasoline fraction. Heavy gasoline fractions undergo selective hydrodesulfurization. Catalyst C1 is filled in the first hydrogenation reactor of the heavy gasoline hydrogenation unit; the catalyst combination C2 / C3 is filled in the second hydrogenation reactor, and the volume ratio of C2 and C3 in the reactor is C2:C3=80:20; The catalyst C3 is loaded in the third hydrogenation reactor. The catalyst in each reactor is sulfided. After the sulfidation is completed, the heavy fraction of the raw material F2 is mixed with hydrogen and enters the first and second hydrogenation reactors to contact with catalysts C1, C2 / C3, respective...

Embodiment 3

[0059] A kind of catalytic cracking gasoline is used as raw material oil F3. The feed oil F3 is first cut into light gasoline fraction and heavy gasoline fraction in fractionation unit, wherein the proportion of light gasoline fraction is 25% by weight, and the proportion of heavy gasoline fraction is 75% by weight. Alkaline extraction sweetening of light gasoline fraction. Heavy gasoline fractions undergo selective hydrodesulfurization. Catalyst C1 is filled in the first hydrogenation reactor of the heavy gasoline hydrogenation unit; the catalyst combination C2 / C3 is filled in the second hydrogenation reactor, and the volume ratio of C2 and C3 in the reactor is C2:C3=85:15; The catalyst combination C2 / C3 is loaded in the third hydrogenation reactor, and the volume ratio of C2 and C3 in the reactor is C2:C3=85:15. The catalyst in each reactor is sulfided. After the sulfidation is completed, the heavy fraction of the raw material F3 is mixed with hydrogen and enters the firs...

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Abstract

The invention discloses a method for producing ultralow-sulfur gasoline. Gasoline raw materials are fractionated into a light gasoline fraction and a heavy gasoline fraction, the light gasoline fraction enters an alkali extraction unit, and a refined light gasoline fraction is obtained. After the heavy gasoline fraction is mixed with hydrogen, the mixture sequentially enters a first hydrogenation reactor and a second hydrogenation reactor and is in contact with a selective hydrogenation diene removal catalyst I and a selective hydrogenation desulfurization catalyst II for reacting, effluent of the second hydrogenation reactor enters a third hydrogenation reactor after hydrogen sulfide is removed through a flash column, the product is in contact with a selective hydrogenation desulfurization catalyst III for reacting, and reaction effluent of the third hydrogenation reactor is separated to obtain a hydrogenation heavy gasoline fraction. The refined light gasoline fraction and the hydrogenation heavy gasoline fraction are mixed to obtain an ultralow-sulfur gasoline product. According to the method, high-sulfur high-olefin catalytically cracked gasoline can be treated, the sulfur content of the product is smaller than 10 micrograms / gram, the octane value loss is small, and the gasoline yield reaches 99% or above.

Description

technical field [0001] The invention relates to a method for refining hydrocarbon oil, in particular to a method for producing ultra-low sulfur gasoline. Background technique [0002] Air pollution is a serious environmental problem, and a large amount of engine emissions is one of the important causes of air pollution. In order to protect the environment, countries around the world have imposed increasingly strict restrictions on the composition of engine fuels in order to reduce the emission of harmful substances. Since the sulfur in gasoline will poison the automobile exhaust gas purification catalyst and seriously affect its ability to treat pollutants, the gasoline quality standards of various countries are particularly strict on the sulfur content. The European Union began to implement the Euro V emission standard in 2009, requiring the sulfur content of gasoline to be less than 10 μg / g, and plans to implement a more stringent Euro VI standard in the future. The seco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/00
Inventor 屈锦华牛传峰高晓冬褚阳习远兵张登前李明丰
Owner CHINA PETROLEUM & CHEM CORP
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