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Catalytic oxidizing method for deeply removing suifide in petrol

A technology of catalytic oxidation and sulfide, which is applied in the direction of multi-stage series refining process treatment, etc., can solve difficult oxidation and other problems, and achieve the effect of easy recovery, simple equipment and mild reaction conditions

Inactive Publication Date: 2004-12-15
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since this method is limited to the oxidation of benzothiophene, dibenzothiophene and its alkyl substitutes, thiophene and alkyl-substituted thiophenes present in gasoline are difficult to be oxidized under mild conditions.
Therefore, there are no documents and patents on the removal of sulfides in gasoline by oxidation depth under mild conditions so far.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Dissolve 10 μl of thiophene in 10 ml of n-octane as simulated gasoline. The selective oxidation reaction was carried out in a three-port reactor with a water bath jacket. 10 ml of thiophene-containing n-octane solution was added to the reactor. 50 μl of oxidant hydrogen peroxide (30% wt.), 10 ml of solvent water, and 0.1 g of catalyst were also sequentially added to the reactor at one time. h 2 o 2 / sulfide molar ratio is 1.2:1. The temperature was controlled in a water bath, and the reaction temperature was 60°C. Electromagnetic stirring was performed for 6 hours. The reaction results showed that the removal rate of thiophene was 91.59%.

Embodiment 2

[0019] Dissolve 10 μl of thiophene in 10 ml of n-octane as simulated gasoline. The selective oxidation reaction was carried out in a three-port reactor with a water bath jacket. 10 ml of the above n-octane solution containing thiophene was added into the reactor. 50 μl of oxidant hydrogen peroxide (30% Wt.), 10 ml of solvent water, and 0.1 g of catalyst were also sequentially added to the reactor at one time. h 2 o 2 / sulfide molar ratio is 2:1. The temperature was controlled in a water bath, and the reaction temperature was 60°C. Electromagnetic stirring was performed for 6 hours. The reaction results showed that the removal rate of thiophene was 95.28%.

Embodiment 3

[0021] Dissolve 10 μl of thiophene in 10 ml of n-octane as simulated gasoline. The selective oxidation reaction was carried out in a three-port reactor with a water bath jacket. 10 ml of the above n-octane solution containing thiophene was added into the reactor. 50 μl of oxidant hydrogen peroxide (30% Wt.), 10 ml of solvent water, and 0.1 g of catalyst were also sequentially added to the reactor at one time. h 2 o 2 / sulfide molar ratio is 3:1. The temperature was controlled in a water bath, and the reaction temperature was 60°C. Electromagnetic stirring was performed for 6 hours. The reaction results showed that the removal rate of thiophene was 96.88%.

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Abstract

The present invention provides catalytic oxidizing process for deeply removing sulfide in petrol. The process adopts solid titanium contaniing molecular sieve as catalyst and hydrogen peroxide solution as oxidant to oxidize main sulfide in petrol at 40-80 deg.c and normal pressure without H2 consumption; and the oxidized product is removed via extraction with methanol, acetonitrile, butanol, water or their mixture. The said process can eliminate 80-90% of sulfide from petrol and lower the sulfur content of FCC petrol from 136 ppm to 18 ppm. The process of the present invention has mild reaction condition, simple apparatus and easy-to-recover catalyst and can realize deep desulfurizing.

Description

technical field [0001] The invention relates to a catalytic oxidation method for deep removal of sulfide in gasoline under a mild condition. Background technique [0002] Combustion of sulfur compounds in liquid fuels can cause extensive environmental pollution. In the clean fuel standards formulated by countries around the world, the restrictions on sulfur content have been greatly increased. The U.S. Environmental Protection Agency stipulates that the emission of sulfur compounds in gasoline should not exceed 30 μg / g in 2006. Using traditional hydrodesulfurization (HDS), only by increasing the temperature and pressure of the reaction, enlarging the reactor and developing a catalyst with higher activity can the fuel meeting the requirements be refined. Catalytic oxidation deep removal of organic sulfides in liquid fuels, as a new technology with low investment and mild reaction conditions or a follow-up deep desulfurization process of HDS process, has a good application p...

Claims

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Application Information

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IPC IPC(8): C10G53/04
Inventor 王祥生孔令艳李钢
Owner DALIAN UNIV OF TECH
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