Method for deep-desulfurization of FCC gasoline by using double oxidants

A technology of deep desulfurization and double oxidant, which is applied in the field of oxidative desulfurization of FCC gasoline and the removal of sulfur-containing organic compounds in FCC gasoline. Achieve the effect of solving economic benefit problems, reducing investment costs, and solving high costs

Inactive Publication Date: 2011-05-04
CAPITAL NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

The sulfur content in FCC gasoline is relatively high, among which thiophene sulfur content is the most, with a relative content of more than 60%. However, the most commonly used hydrodesulfurization method is difficult to remove thiophene compounds. In order to produce ultra-low sulfur gasoline, hydrodesulfurization Must require high temperature and high pressure, consume a lot of H 2 And use a new catalyst, and will lead to a reduction in gasoline octane number
Therefore, the traditional hydrodesulfurization method is not only limited by cost and hydrogen source, but also deep desulfurization will lead to a large loss of octane number

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0017] Example 1: Using Ce with the assistance of ultrasound 4+ and H 2 o 2 Desulfurization experiment of double oxidant oxidation FCC gasoline (sulfur content 999.03μg / g).

[0018] 1.1 Combine Ce (SO 4 ) 2。 4H 2 O powder is dissolved in a sulfuric acid solution with a pH of 0.5-0.8, so that Ce (SO 4 ) 2 The concentration of the solution is 0.4~0.8mol / L. In Sheng Ce (SO 4 ) 2 Add FCC gasoline (sulfur content 999.03μg / g) into the reaction bottle of the solution, so that the FCC gasoline and water phase in the reaction bottle are in a volume ratio of 1:7 to 1:10. In the middle, the frequency is 100w ultrasonic stirring reaction for 10 ~ 30min. The oil phase is extracted three times with sulfolane, the volume ratio of FCC gasoline and extractant is between 1:1 and 1:3, and after the sulfolane extraction, the second extraction is performed with the volume ratio of FCC gasoline and water between 1:1 and 1:3 repeatedly. Ce 4+ Oxidation medium oxidizes FCC gasoline to C...

example 2

[0022] Example 2: Using Ce with the assistance of ultrasonic waves 4+ and H 2 o 2 Desulfurization experiment of double oxidant oxidation FCC gasoline (sulfur content 1500.00μg / g).

[0023] 2.1 Combine Ce (SO 4 ) 2。 4H 2 O powder is dissolved in a sulfuric acid solution with a pH of 0.5-0.8, so that Ce (SO 4 ) 2 The concentration of the solution is 0.4~0.8mol / L. In Sheng Ce (SO 4 ) 2 Add FCC gasoline (sulfur content 1500.00μg / g) into the reaction bottle of the solution, so that the FCC gasoline and water phase in the reaction bottle are in a volume ratio of 1:7 to 1:10. In the middle, the frequency is 100w ultrasonic stirring reaction for 10 ~ 30min. The oil phase is extracted three times with sulfolane, the volume ratio of FCC gasoline and extractant is between 1:1 and 1:3, and after the sulfolane extraction, the second extraction is performed with the volume ratio of FCC gasoline and water between 1:1 and 1:3 repeatedly. Ce 4+ Oxidation medium oxidizes FCC gas...

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Abstract

The invention belongs to the field of petrochemical industry, and relates to a method for deep-desulfurization of FCC gasoline by ultrasound assisted Ce4+ and H2O2 double oxidants oxidation. In the method, organosulfur compounds in the FCC gasoline are removed by cooperation of the Ce4+ oxidant and the H2O2 oxidant under the assist of ultrasonic waves, so that the aim of deep-desulfurization is implemented; wherein Ce3+ generated after the Ce4+ oxidizes the FCC gasoline is reusable after being prepared through an electrochemical method. Compared with the prior desulfurization technology, the method not only can effectively remove sulfocompounds which harm the environment in the FCC gasoline, but also meets requirements on deep-desulfurization of the FCC gasoline. Simultaneously, the Ce4+ prepared by the electrochemical method has higher electrochemical activity, and the method can ensure clean production as well as improve economic benefits.

Description

technical field [0001] The invention belongs to the field of petrochemical industry and relates to a method for oxidative desulfurization of FCC gasoline. 4+ and H 2 o 2 Combination of two oxidants for oxidation removal of sulfur-containing organic compounds in FCC gasoline. Background technique [0002] With the development of the automobile industry, the annual consumption of gasoline for vehicles is increasing sharply, and the large amount of exhaust emissions from automobiles, especially the SOx contained in them, deteriorates the air quality and makes the environmental pollution more and more serious. Therefore, environmental regulations have increasingly stringent requirements for sulfur content. Both the European Union and the United States have implemented restrictions on the sulfur content of gasoline below 50 μg / g since 2005. In 2009, the fuel oil standard reached the Euro V standard, and the sulfur content was 10 μg / g. . my country strives to achieve the synch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G53/14
Inventor 马洁李海霞
Owner CAPITAL NORMAL UNIVERSITY
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