Method for reducing sulfur content in gasoline

A technology of sulfur content and gasoline, applied in the petroleum industry, processing hydrocarbon oil, refining hydrocarbon oil, etc., can solve the problems of large heat source consumption, high price, loss of industrial application value, etc., to reduce the contact reaction time and ensure the desulfurization effect. Effect

Active Publication Date: 2008-07-02
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the temperature of the material has been lowered during the sedimentation and separation of the ionic liquid, it is necessary to reheat the material to not lower than the boiling point of gasoline to distill the gasoline, so a large amount of heat source is consumed
The huge energy consumption makes this simple desulfurization method using ionic liquid alkylation first, then sedimentation to separate the catalyst, and then distillation to obtain gasoline with reduced sulfur content loses its industrial application valu

Method used

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

Examples

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Embodiment 1

[0035] This example is used to illustrate the method for reducing the sulfur content in gasoline provided by the present invention.

[0036] Such as figure 1Shown, in the bubble reactor 4 that effective volume is 50 milliliters, pack 10 grams of trimethylamine hydrochloride chloroaluminate type ionic liquid T22 (Xingpu Fine Chemical Co., Ltd.), inject high-boiling point in the sedimentation separator 9 Distillate oil, stop injecting when the liquid level of high boiling point distillate oil reaches the overflow port. Use a metering pump to feed the full fraction FCC gasoline (expressed as SO in Table 2, density: 0.7282 mg / liter, sulfur content: 610 ppm, distillation range: 10% is 36°C, 50% is 89°C, 90% is 160°C) Inject into the fractionation tower 2 from the middle through the pipeline 1 at a flow rate of 500 g / h, supply heat from the bottom of the fractionation tower 2, and cut the whole fraction catalytic cracked gasoline at 120°C to vaporize the light fraction gasoline wit...

Embodiment 2

[0044] This example is used to illustrate the method for reducing the sulfur content in gasoline provided by the present invention.

[0045] According to the method described in embodiment 1, the sulfur content in gasoline is reduced, and the difference is that 3 grams of cetyltrimethylammonium chloride aluminum chloride type ionic liquid C22 (Xingpu) are loaded into the bubble reactor 4 Fine Chemical Co., Ltd.), the countercurrent contact temperature in the bubble reactor was 150 ° C, and the contact time was 5 minutes. The content (weight fraction) of each fraction is shown in Table 1. The sulfur content of gasoline products with reduced sulfur content is shown in Table 2 by mixing light distillate gasoline A and gasoline distillate B with reduced sulfur content with heavy distillate gasoline C with reduced sulfur content.

Embodiment 3

[0047] This example is used to illustrate the method for reducing the sulfur content in gasoline provided by the present invention.

[0048] According to the method described in embodiment 1, the sulfur content in gasoline is reduced, and the difference is that 30 grams of pyridine hydrochloride chloroaluminate type ionic liquid P22 (Xingpu Fine Chemical Co., Ltd.) is loaded into the bubble reactor 4, and The countercurrent contact temperature in the bubble reactor was 80°C and the contact time was 10 minutes. The content (weight fraction) of each fraction is shown in Table 1. The sulfur content of gasoline products with reduced sulfur content is shown in Table 2 by mixing light distillate gasoline A and gasoline distillate B with reduced sulfur content with heavy distillate gasoline C with reduced sulfur content.

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Abstract

A method for reducing sulfur content in gasoline comprises the following steps of: (1) contact-reacting a sulfur-containing light fraction gasoline with an ionic liquid at a temperature not less than the boiling point of the sulfur-containing light fraction gasoline and not larger than 200 DEG C, and condensing the gas-phase product to separate the gas-phase product from the liquid-phase product, thus obtaining a light fraction gasoline with reduced sulfur content; and (2) mixing the light fraction gasoline with reduced sulfur content with a sulfur-containing heavy fraction gasoline. The method provided by the invention can, on one hand, reduce the addition level of the ionic liquid and, on the other hand, reduce the yield of liquid-phase product (i.e. the loss of gasoline fraction) on the premise of ensured desulfurization effect. Particularly, most of light fraction gasoline with reduced sulfur content can be obtained without distillation. The gasoline obtained by mixing the light fraction gasoline with reduced sulfur content after contact reaction with the heavy fraction gasoline with reduced sulfur content obtained by hydrodesulfurization has reduced octane number by a magnitude within two octane number units and high desulfurization rate larger than 90% in comparison with the gasoline before desulfurization, so that the gasoline product can meet the EUROIII emission standard of automobile gasoline.

Description

technical field [0001] The invention relates to a gasoline upgrading method, in particular to a method for reducing the sulfur content in gasoline. Background technique [0002] FCC gasoline occupies a dominant position in my country's finished gasoline due to its high octane number. However, due to the relatively high olefin content and sulfur content in this kind of gasoline, generally 15-45% and 500-5000ppm respectively, it cannot meet the new gasoline product standards, such as the equivalent of Euro II issued by Beijing in 2004. Gasoline technical requirement 1 stipulates that the sulfur content is not more than 500ppm, the olefin content is not more than 30%, and the aromatic content is not more than 40% (the benzene content in aromatics is not more than 2.5%). Equivalent to Euro III's Motor Gasoline Technical Requirements 2, when the sulfur content is not greater than 150ppm, the aromatics content is not greater than 35%, and the olefin content is not greater than 25...

Claims

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Application Information

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IPC IPC(8): C10G67/00C10G29/00
Inventor 彭朴葸雷陆婉珍马传彦李明丰高晓东
Owner CHINA PETROLEUM & CHEM CORP
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