Deep desulfurization method for catalytically cracked gasoline

A technology of catalytic cracking gasoline and deep desulfurization, which is applied in the petroleum industry, processing hydrocarbon oil, refining hydrocarbon oil, etc., and can solve the problems of octane number loss, high octane number loss, and large hydrotreating ratio of full distillate gasoline. Achieve the effect of reducing the loss of octane number and wide applicability
CN103555359AActive Publication Date: 2014-02-05HEBEI REFINING TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HEBEI REFINING TECH CO LTD
Publication Date
2014-02-05

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Abstract

The invention provides a gasoline fraction solvent extraction desulfurization method comprising the steps of enabling a gasoline fraction to enter from the lower middle part of an extraction tower, enabling a solvent to enter from the top of the extraction tower, filling saturated C5 into a reflux device at the bottom of the extraction tower, controlling the temperature of the top of the extraction tower at 55-100 DEG C, the temperature of the bottom of the extraction tower at 40-80 DEG C, the pressure of the top of the extraction tower at 0.2-0.7MPa, the solvent to gasoline fraction ratio at 1.0-5.0 and the saturated C5 to gasoline fraction feeding ratio at 0.1-0.5, ejecting the extracted and desulfurized gasoline fraction out of the extraction tower, and washing to obtain a desulfurized gasoline fraction; discharging the solvent from the bottom of the extraction tower, separating a C5-contained light component, a sulfur-rich component, water and the solvent, returning the light component to the reflux device of the extraction tower, returning the water to the washing step, and returning the solvent to the top of the extraction tower, wherein sulfides, aromatic hydrocarbons and the C5 are extracted by the solvent. The invention also provides a deep desulfurization method for catalytically cracked gasoline. The solvent extraction desulfurization method is flexibly combined with the traditional desulfurization technology used by an enterprise, so that the deep desulfurization is realized, and meanwhile, the octane value loss of the gasoline fraction is remarkably reduced.
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Description

technical field

[0001] The invention relates to a gasoline desulfurization method, in particular to a method for catalytic cracking gasoline deep desulfurization. Background technique

[0002] Facing the situation of increasing smog, the government has accelerated the pace of upgrading the quality of gasoline and diesel. In 2014, the National IV emission standard for oil products will be implemented nationwide, requiring the sulfur content of gasoline to be reduced to below 50ppm; at the same time, the National V quality The standard requires reducing the sulfur content to below 10ppm, and it was first implemented in Beijing, Shanghai, and Guangzhou in 2013. FCC gasoline accounts for about 70-80% of gasoline product components in my country. The main task of gasoline sulfur reduction is actually FCC gasoline sulfur reduction.

[0003] Existing catalytic cracking gasoline sulfur reduction technologies are mainly represented by Sinopec S-zorb, Academy of Petroleum Sciences RS...

Claims

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