Method of peroxyformic acid of gasoline oxidation extraction and desulfurization

A technology of peroxyformic acid and gasoline, which is applied in the field of peroxyformic acid oxidation, extraction and desulfurization of gasoline, which can solve the problems of low gasoline yield and achieve 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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  • Method of peroxyformic acid of gasoline oxidation extraction and desulfurization
  • Method of peroxyformic acid of gasoline oxidation extraction and desulfurization
  • Method of peroxyformic acid of gasoline oxidation extraction and desulfurization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Mix 60g of formic acid and 10g of hydrogen peroxide with a mass concentration of 30%, add tungstic acid to make the mass fraction of the mixed solution 1.0%, stir and mix at 25°C for 30min to prepare a peroxyformic acid oxidation solution. Under the conditions of reaction temperature 30°C and reaction time 30min, in a 250ml flask, oxidize 100.0ml of catalytically cracked gasoline with a sulfur content of 183.33μg / g in a 250ml flask, and place the mixture in a 250ml separatory funnel after oxidation Settled for 20 minutes, separated the oxidized liquid in the lower layer; then, at room temperature, under the condition that the volume ratio of deionized water to gasoline was 1:2, in a 250ml flask, washed the gasoline with 50.0ml deionized water for 15min, and the mixture was washed with water Settling in a 250ml separating funnel for 20min, the lower aqueous phase was separated to obtain the upper layer of oxidized gasoline. Then, under the conditions of extraction temper...

Embodiment 2～ Embodiment 5

[0023] Mix 60g of formic acid and 10g of hydrogen peroxide with a mass concentration of 30%, respectively add sodium tungstate so that the mass fraction of the mixed solution is 0.0%, 0.5%, 1.0%, and 1.5%, and stir and mix at 25°C for 30 minutes to prepare Obtain peroxyformic acid oxidation solution. At a reaction temperature of 30°C and a reaction time of 30 minutes, in a 250ml flask, use these oxidation solutions to oxidize 100.0ml of FCC gasoline with a sulfur content of 183.33μg / g, and put the mixture in a 250ml separating funnel after oxidation. Settling for 20 minutes, the oxidation liquid in the lower layer was separated; then, water washing treatment, solvent extraction, and water washing treatment were carried out. The water washing treatment and solvent extraction conditions were the same as in Example 1. The desulfurization experiment results are listed in Table 1.

[0024] Table 1

[0025]

[0026]

[0027] It can be seen from the data in Table 1 that, compa...

Embodiment 6～ Embodiment 11

[0029] Mix different amounts of formic acid, hydrogen peroxide, and deionized water, and add sodium tungstate to prepare a peroxyformic acid oxidation solution with a mass fraction of sodium tungstate of 0.5%. Carry out oxidation treatment to the 100.0ml catalytic gasoline that sulfur content is 183.33 μ g / g, then carry out the washing of embodiment 1 condition, solvent extraction, washing treatment, investigate the influence of peroxyformic acid solution raw material composition and consumption on catalytic gasoline desulfurization, will corresponding The experimental results are listed in Table 2.

[0030] Table 2

[0031]

[0032] As can be seen from Table 2, under the certain situation of preparing the raw material ratio of peroxyformic acid solution, along with the increase of the peroxyformic acid solution consumption, the desulfurization rate improves to some extent, and the gasoline yield decreases to some extent; Under certain circumstances, with the increase of t...

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Abstract

The invention provides a method of peroxyformic acid of gasoline oxidation extraction and desulfurization. The method comprises the following steps: adding a tungstic acid oxidation catalyst or a tungstate oxidation catalyst into a mixed solution of formic acid and hydrogen peroxide, preparing an oxidation solution of peroxyformic acid; performing an oxidation treatment to the gasoline by the oxidation solution under the mild condition, then washing the gasoline by water to obtain the oxidized gasoline; then, extracting the oxidized gasoline by the extraction solvent, and washing the gasoline by water again to realize the desulphurization of gasoline. The invention has the characteristics of simple and feasible process, high gasoline desulfurization rate, high gasoline yield and the like.

Description

(1) Technical field [0001] The invention relates to a gasoline peroxyformic acid 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 CN1047788...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G53/14
Inventor 任杰金辉袁海宽
Owner ZHEJIANG UNIV OF TECH
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