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Phase-transfer catalytic oxidation extraction desulphurization method for gasoline

A technology of phase transfer catalysis and phase transfer catalyst, which is applied in the direction of multi-stage series refining process treatment, etc., can solve the problems of low gasoline yield, etc., and achieve the effect of high gasoline desulfurization rate and gasoline yield, and good desulfurization effect.

Inactive Publication Date: 2012-01-11
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Regarding the gasoline oxidative desulfurization method using molecular oxygen as an oxidant, due to the use of effective oxidation catalysts and phase transfer agents, a higher desulfurization rate can be achieved, but the gasoline yield is low (generally 70-80%)

Method used

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  • Phase-transfer catalytic oxidation extraction desulphurization method for gasoline
  • Phase-transfer catalytic oxidation extraction desulphurization method for gasoline
  • Phase-transfer catalytic oxidation extraction desulphurization method for gasoline

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] With the molar ratio of concentrated sulfuric acid and tri-n-octylamine 1:1, at room temperature, the acid was added dropwise to react with tri-n-octylamine in a 250mL flask for 1 hour to obtain tri-n-octylamine sulfate, which was placed in a brown bottle Medium, keep away from light, and reserve.

[0021] Weigh 50ml (55.2g) hydrogen peroxide (hydrogen peroxide mass content is 30%) and 0.552g sodium tungstate (1.0% of hydrogen peroxide solution quality), 0.3g trin-octylamine sulfate phase-transfer catalyst (hydrogen peroxide mass content is 30%) respectively 0.5%), moved to a 250ml three-necked flask, stirred and mixed at room temperature for 5min to obtain an oxidation solution; weighed 100ml (71.4g) catalytically cracked gasoline with a sulfur content of 187.1 μg / g, and moved it to a three-necked flask of an oxidation solution, Stir the reaction in a water bath at 30°C for 20 minutes; then pour the reaction mixture into a separatory funnel and let it stand for 20 minu...

Embodiment 2～ Embodiment 4

[0024] Three kinds of acids were used to react with tri-n-octylamine to synthesize three kinds of tri-n-octylamine inorganic acid salt phase transfer agents, and gasoline desulfurization experiments were carried out under the conditions of Example 1. The experimental results are listed in Table 1 together. Comparing the data in Table 1, it can be seen that the phase transfer catalytic desulfurization effect of tri-n-octylamine sulfate is better.

[0025] Table 1

[0026]

Embodiment 5～ Embodiment 8

[0028] Tri-n-octylamine sulfate was used as a phase transfer agent, the oxidation reaction temperature was 60°C, and other desulfurization experimental conditions were the same as in Example 1. The experimental results of oxidized gasoline extracted at different stages are listed in Table 2. It can be seen from Table 2 that as the number of extraction stages increases, the gasoline desulfurization rate continues to increase, while the gasoline yield continues to decrease.

[0029] Table 2

[0030]

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PUM

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Abstract

The invention provides a phase-transfer catalytic oxidation extraction desulphurization method for gasoline. The method comprises the following steps: adding an oxidation catalyst and a phase-transfer catalyst, an inorganic acid salt of tri-n-octylamine, into an oxidizing agent of hydrogen peroxide to prepare an oxidizing solution; carrying out oxidation treatment on gasoline with the oxidizing solution under mild conditions, and rinsing the gasoline so as to obtain oxidized gasoline; extracting the oxidized gasoline with an extracting solvent, and rinsing the gasoline again so as to realize desulphurization of the gasoline. The invention has the characteristics of a simple and practicable process, a high gasoline desulfurization rate, high yield of gasoline, etc., and has a good application prospect.

Description

(1) Technical field [0001] The invention relates to a gasoline phase transfer catalytic oxidation extraction desulfurization method. (2) Background technology [0002] With the rapid increase of global car ownership, people have paid great attention to the serious environmental pollution caused by automobile exhaust emissions due to the high sulfur content of gasoline. Countries around the world have put forward more and more stringent requirements on the sulfur content of gasoline. [0003] Gasoline desulfurization methods can generally be divided into two categories: hydrodesulfurization and non-hydrogenation desulfurization. At present, people have studied more about non-hydrogenation desulfurization. Gasoline non-hydrogenation desulfurization methods mainly include adsorption desulfurization, extraction desulfurization, complexation desulfurization, biological desulfurization, oxidation desulfurization, and photochemical desulfurization. Hearn et al disclosed in the CN...

Claims

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Application Information

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IPC IPC(8): C10G53/14
Inventor 任杰金辉袁海宽
Owner ZHEJIANG UNIV OF TECH
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