Method for oxidation sweetening of light-end products

A light oil, oxidative desulfurization technology, applied in chemical instruments and methods, refining with oxygenated compounds, chemical/physical processes, etc., can solve the problems of high cost and large consumption, and achieve improved efficiency, good catalytic performance, The effect of high efficiency and low consumption reaction conditions

Inactive Publication Date: 2008-09-24
WUHAN UNIV OF SCI & TECH
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Problems solved by technology

Non-aqueous organic peroxide oxidants can quickly oxidize sulfur-containing compounds, but organic peroxides as oxidants have the disadvantages of large dosage and high cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A method for oxidative desulfurization of light oil products: adding 1.0-1.2% hydrogen peroxide of the mass of the catalytic cracking gasoline and 50-60% of the volume of the catalytic cracking gasoline to catalytic cracking gasoline with a sulfur content of 550 μg / g The phosphomolybdic acid aqueous solution, the phosphomolybdic acid in the phosphomolybdic acid aqueous solution is 0.5-0.6% of the mass of the catalytic cracked gasoline, heated by microwave radiation, reacted at 70°C and normal pressure for 1.0 hour, and then separated the oil agent, Determination of sulfur content in oil. The sulfur content of FCC gasoline was reduced to 48μg / g, and the desulfurization rate was 91.3%.

Embodiment 2

[0023] A method for oxidative desulfurization of light oil products: in hydrogenated diesel oil with a sulfur content of 650 μg / g, add hydrogen peroxide of 1.0-1.2% of the mass of the hydrogenated diesel oil and 50-60% of the volume of the hydrogenated diesel oil The phosphomolybdic acid aqueous solution, the phosphomolybdic acid in the phosphomolybdic acid aqueous solution is 0.5-0.6% of the mass of the hydrogenated diesel oil, heated by microwave radiation, reacted at 70°C and normal pressure for 1.2 hours, and then separated the oil agent, Determination of sulfur content in oil. The sulfur content of hydrogenated diesel oil was reduced to 61μg / g, and the desulfurization rate was 90.6%.

Embodiment 3

[0025] A method for oxidative desulfurization of light oil products: in kerosene with a sulfur content of 1250 μg / g, add 3.0-3.2% hydrogen peroxide of the kerosene quality and 100-110% phosphomolybdic acid aqueous solution of the kerosene volume, The phosphomolybdic acid in the phosphomolybdic acid aqueous solution is 2.0-2.1% of the mass of the kerosene, heated by microwave radiation, reacted at 70°C and normal pressure for 2.0 hours, then separated the oil agent, and measured the sulfur content in the oil. The sulfur content of kerosene was reduced to 77μg / g, and the desulfurization rate was 93.8%.

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PUM

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Abstract

The invention relates to a method for oxidative desulfurization of light oil. In the technical proposal of the invention, 1.0 to 4.0 percent of hydrogen peroxide of the light oil by mass and 50 to 200 percent of heteropoly acid catalyzer solution of the light oil by volume are added in the light oil for reaction for 0.5 to 3 hours at room temperature of 100 DEG C under the condition of normal atmosphere before oil soluble concentrate is separated. The quantity of the heteropoly acid catalyzer in the heteropoly acid catalyzer solution is 0.5 to 2.0 percent of the light oil by mass; and microwave radiation is adopted for heating. In the invention, heteropoly acid is used as the oxidative desulfurization catalyzer of the light oil. The heteropoly acid has the structure of oxide and molecular sieve with acidity, oxidation, reducibility and good catalysis. Microwave radiation is adopted for heating instead of the traditional heating type, thus increasing the collision frequency of molecules, and significantly improving the efficiency of the oxidative desulfurization of light oil. In addition, the method has advantages of high efficiency, low consumption and gentle reaction condition.

Description

technical field [0001] The invention belongs to the technical field of desulfurization of light oil products, and in particular relates to a method for oxidative desulfurization of light oil products. technical background [0002] Sulfur-containing compounds in fuel oil are converted into sulfur oxides and emitted in the atmosphere, which will form "acid rain". More importantly, sulfur oxides will cause irreversible poisoning of the conversion catalyst in the exhaust gas treatment device and significantly reduce nitrogen oxides in the exhaust gas. The conversion efficiency of pollutants, incompletely combusted hydrocarbons, particulate matter, etc., will cause serious pollution to the environment. In addition, the recoverable crude oil in the world has generally shown a trend of inferior quality, and the sulfur content in fuel is also getting higher and higher. The World Gasoline and Diesel No. 4 Standards that have been issued stipulate that their total sulfur content shal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G27/12B01J27/25
Inventor 王光辉邱江华邱文杰吕早生曾丹林
Owner WUHAN UNIV OF SCI & TECH
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