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Method for removing sulfides in diesel by oxidation-absorption

A technology for sulfides and oxidation products, which is used in the refining of oxygenated compounds, the petroleum industry, and the refining of hydrocarbon oils, etc., to achieve the effects of high diesel recovery rate, simple operation steps and mild reaction conditions

Inactive Publication Date: 2008-09-03
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] So far, there is no report on the method of using titanium-silicon molecular sieve as a catalyst, hydrogen peroxide as an oxidant, and using a solid adsorbent to adsorb oxidation products, and simultaneously oxidize and adsorb to remove sulfide from diesel.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Dissolve benzothiophene in n-octane to prepare simulated fuel, and the molecular content of benzothiophene is 1000 μg / g. The selective oxidation reaction is carried out in a three-port reactor with a water bath jacket, and the temperature is controlled by the water bath. 0.01g of Ti-HMS catalyst, 0.1g of macroporous silica gel, 10mL of the above simulated fuel, and 22μL of oxidant hydrogen peroxide (30wt.%) were sequentially added into the reactor. h 2 o 2 / sulfide molar ratio is 4:1. The temperature is 60°C. Electromagnetic stirring was used to react for 2 hours. The result of the reaction was that the removal rate of benzothiophene was 50.60%.

Embodiment 2

[0022] Dissolve benzothiophene in n-octane to prepare simulated fuel, and the molecular content of benzothiophene is 1000 μg / g. The selective oxidation reaction is carried out in a three-port reactor with a water bath jacket, and the temperature is controlled by the water bath. 0.01g Ti-HMS catalyst, 0.1g acidic Al 2 o 3 and 10 mL of the above-mentioned simulated fuel, and 22 μL of oxidant hydrogen peroxide (30 wt.%) were sequentially added into the reactor. h 2 o 2 / sulfide molar ratio is 4:1. The temperature is 60°C. Electromagnetic stirring was used to react for 2 hours. The result of the reaction was that the removal rate of benzothiophene was 49.09%.

Embodiment 3

[0024] Dissolve benzothiophene in n-octane to prepare simulated fuel, and the molecular content of benzothiophene is 1000 μg / g. The selective oxidation reaction is carried out in a three-port reactor with a water bath jacket, and the temperature is controlled by the water bath. 0.01g Ti-HMS catalyst, 0.1g basic Al 2 o 3 and 10 mL of the above-mentioned simulated fuel, and 22 μL of oxidant hydrogen peroxide (30 wt.%) were sequentially added into the reactor. h 2 o 2 / sulfide molar ratio is 4:1. The temperature is 60°C. Electromagnetic stirring was used to react for 2 hours. The result of the reaction was that the removal rate of benzothiophene was 21.19%.

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Abstract

Disclosed is a sulfide removing process from diesel oil by oxidizing and absorbing, which pertains to oil processing field. The process is characterized by using hydrogen dioxide solution as oxidizing agent, oxidizing benzothiophene sulfide into corresponding sulphoxide or sulfone using titanium and silicium molecular screen as catalyst at temperature of 30-80 DEG C and under normal pressure, absorbing oxidation products by solid adsorbent to achieve object of sulfur removing, with removing ratio of benzothiophene reaching 100%. Effects and advantages of the invention is simultaneously carrying out oxidizing and absorbing, with mild condition, simple apparatus, high activity of catalyst, catalyst and adsorbent which are easy to recycle, high recycling ratio of diesel oil.

Description

technical field [0001] The invention belongs to the technical field of petroleum processing. The invention relates to the application of a solid catalyst titanium-silicon molecular sieve and a solid adsorbent in desulfurization of diesel oil, and provides a method for removing sulfide in diesel oil by oxidation adsorption. Background technique [0002] Due to the existence of sulfur compounds, SOx is generated during the combustion of liquid fuels, which affects the ecological environment. In order to strengthen the control of environmental pollution, countries around the world have continuously proposed more stringent standards for the sulfur content of liquid fuels. Traditional hydrodesulfurization technology is difficult to remove benzothiophene, dibenzothiophene and its alkyl substitutes in diesel oil, and requires high equipment and expensive operation costs, making it difficult to meet the requirements of deep desulfurization. In recent years, oxidative desulfurizati...

Claims

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Application Information

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IPC IPC(8): C10G27/12C10G25/00
Inventor 李钢袁红玉
Owner DALIAN UNIV OF TECH
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