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Hydrogen peroxide-hydrochloric acid oxidation and desulfurization method

A technology for oxidative desulfurization and hydrogen peroxide, applied in the field of hydrogen peroxide-hydrochloric acid oxidative desulfurization, can solve the problems of difficult large-scale application and high production cost, and achieve the effects of economical reaction, low price and mild reaction conditions

Inactive Publication Date: 2013-07-03
HUAIYIN TEACHERS COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the hydrogen peroxide system has been studied the most, mainly H 2 o 2 - ultrasonic desulfurization, H 2 o 2 - Organic acid desulfurization method, H 2 o 2 -Heteropolyacid system, H 2 o 2- Photocatalytic system, H 2 o 2 - Ionic liquid desulfurization system, but the above desulfurization technology not only has high production cost, but also is difficult to apply on a large scale

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1. Simulating the desulfurization effect of dibenzothiophene in fuel oil

[0028] Follow the steps below to desulfurize dibenzothiophene n-octane simulated fuel;

[0029] 1. Take 5.00 ml of n-octane containing 2.50 mM dibenzothiophene, add 5.00 ml of 37% (W / W) hydrogen peroxide, add 5.00 ml of 1M hydrochloric acid solution, add 0.2 ml of ethanol, seal it in the reaction kettle, and the reaction temperature is 50°C, vigorously stirred for 2 hours.

[0030] 2. After the simulated fuel oil has stood still for 10 minutes, take 10ul each of the simulated fuel oil and n-octane containing 2.50 mM dibenzothiophene, dissolve and mix with 3.00ml ethanol, measure the absorbance at 236nm, and calculate the desulfurization rate of dibenzothiophene to be 75.0 %.

Embodiment 2

[0031] Example 2: Desulfurization effect of 4,6-dibenzothiophene in simulated fuel

[0032] Follow the steps below to desulfurize 4,6-dibenzothiophene n-octane simulated fuel.

[0033] 1. Take 5.00 ml of n-octane containing 2.50 mM 4,6-dibenzothiophene, add 5.00 ml of 37% (W / W) hydrogen peroxide, add 5.00 ml of 1M hydrochloric acid solution, add 0.2 ml of ethanol, and seal it in the reaction kettle , the reaction temperature was 50° C., and vigorously stirred for 4 hours.

[0034] 2. After the simulated fuel was left standing for 10 minutes, take 10ul each of the treated simulated fuel and n-octane containing 2.50 mM 4,6-dibenzothiophene, dissolve and mix with 3.00ml n-octane, measure the absorbance at 241nm, and calculate 4, The desulfurization rate of 6-dibenzothiophene is over 70.0%.

Embodiment 3

[0035] Example 3: Desulfurization effect of benzothiophene in simulated fuel

[0036] Follow the steps below to desulfurize benzothiophene n-octane simulated fuel.

[0037] 1. Take 5.00 ml of n-octane containing 2.50 mM benzothiophene, add 5.00 ml of 37% (W / W) hydrogen peroxide, add 5.00 ml of 1M hydrochloric acid solution, add 0.2 ml of ethanol, seal it in the reaction kettle, and the reaction temperature is 50 °C, vigorously stirred for 2 hours.

[0038] 2. After the simulated fuel was left standing for 10 minutes, take 10ul each of the treated simulated fuel and n-octane containing 2.50 mM benzothiophene, dissolve and mix with 3.00ml ethanol, measure the absorbance at 226nm, and calculate the desulfurization rate of benzothiophene to be over 65.0% .

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PUM

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Abstract

The invention discloses a hydrogen peroxide-hydrochloric acid oxidation and desulfurization method. The hydrogen peroxide-hydrochloric acid oxidation desulfurization method comprises the following steps of: oxidizing sulfide in fuel oil into sulphone or sulfoxide with strong polarity in an acid medium by using hydrogen peroxide, and extracting the sulphone or sulfoxide by using a polar solvent, thus removing sulfide in the fuel oil; controlling the potential of an oxidizing agent and the reaction speed by controlling the concentration of the hydrogen peroxide and hydrochloric acid and reaction temperature; and reinforcing the dispersity of the fuel oil in water through an organic matter chaotropic agent, accelerating the reaction speed, and extracting the sulphone or sulfoxide from the fuel oil by using the polar solvent. The hydrogen peroxide-hydrochloric acid oxidation and desulfurization method has advantages of low cost, high oxidation and desulfurization efficiency and very good popularization and application prospect in petrochemical industries.

Description

technical field [0001] The invention relates to the technical field of fuel oil desulfurization, in particular to a hydrogen peroxide-hydrochloric acid oxidation desulfurization method. Background technique [0002] The existence of sulfur has many hazards to the petroleum processing process and its product application, such as corroding metal equipment, causing catalyst poisoning, and polluting the environment during use. The most widely used desulfurization method in the petroleum refining industry is catalytic hydrogenation, but the effect of hydrodesulfurization on deep desulfurization of gasoline and diesel products is not ideal, and the production cost is high, which is the bottleneck for oil refining enterprises to produce low-sulfur fuel. The sulfides in catalytic cracking fuel are mainly thiophene and benzothiophene sulfides, accounting for more than 80% of the total sulfides. At present, the desulfurization methods that have been studied more mainly include cataly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G53/14
Inventor 宋远志魏科霞盖秀兰
Owner HUAIYIN TEACHERS COLLEGE
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