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Catalyzed oxidation desulfuration process of petroleum products

A technology for catalytic oxidation desulfurization and petroleum products, applied in the petroleum industry, refined hydrocarbon oil, etc., can solve problems such as damage to oil quality, difficult operation, equipment corrosion, etc., achieve high selectivity and oxidation efficiency, wide application prospects, and reaction The effect of mild conditions

Active Publication Date: 2009-11-04
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the variability and complexity of oil components, the oxidative desulfurization technology currently reported and being announced as a pilot test has great limitations. The most prominent is that most oxidation processes do not use catalytic oxidation methods, but are based on organic peroxygen On the basis of acid oxidation reaction, therefore, there are some defects: need to react in organic acidic medium, and strengthen polar solvent extraction; due to the use of H 2 o 2 The existing phase separation problem makes the use of H 2 o 2 The efficiency of oxidative desulfurization is very low; due to the low selectivity of organic peroxyacids, the oxidation of unsaturated hydrocarbons with organic peroxides often leads to excessive oxidation of unsaturated hydrocarbons, which damages the quality of oil products, and the post-treatment is also very complicated; due to strong acidic and polar oxidants and pumping Extensive use of extractant leads to corrosion of equipment and colloidal oxidation and adhesion in oil to block equipment, difficult operation and high cost of desulfurization treatment, which is about 120 yuan / ton

Method used

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  • Catalyzed oxidation desulfuration process of petroleum products

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1, styrene / divinylbenzene copolymer-potassium permanganate catalytic gasoline desulfurization

[0017] Choose commercially available styrene / divinylbenzene copolymer with quaternary ammonium group strong anion exchange resin (U.S. Aldrich Reagent Company Amberlite IRA 900 type) 10g, add in the reaction vessel after washing pretreatment, under stirring, Slowly add potassium permanganate (KMnO 4 , mass 60mg) aqueous solution is loaded and bonded until there is no purple in the aqueous solution, then filtered and set aside.

[0018] Add 30ml of commercial gasoline with a sulfur content of 102mg / L (octane number 90.1 (RON), sulfur content 120mg / L) in a 250ml stainless steel reactor, add a desulfurization catalyst in an amount of 0.05% of the gasoline mass ratio, and then add ethanol 50ml, after mixing, add H 2 o 2 (30%) 1.5ml, airtight reaction, maintain reaction temperature 75 ℃, and with the gasoline that does not add catalyst as contrast, the change of gaso...

Embodiment 2

[0019] Embodiment 2, dodecyltrimethylammonium chloride-sodium tungstate catalytic gasoline desulfurization

[0020] Take 0.1g of commercially available cationic surfactant dodecyltrimethylammonium chloride, dissolve it in 2.5mlHO 2 o 2 (30%), mix this solution with 50ml raw gasoline (octane number 90.1 (RON), sulfur content 120mg / L), add 80ml ethanol, add sodium tungstate 15mg after mixing, and heat up to React at 80°C for 30 minutes. After separating ethanol and water, measure the quality and sulfur content of the treated oil. The result is that the octane number is 90.07 (RON) and the sulfur content is 23mg / L.

Embodiment 3

[0021] Embodiment 3, rhodamine-cerium ammonium sulfate catalytic gasoline desulfurization

[0022] Dissolve 0.05g of commercially available cationic dye Rhodamine B in 50ml of acetonitrile, mix with 50g of gasoline (octane number 93.2 (RON), sulfur content 79mg / L), add cerium ammonium sulfate 0.05g, add isopropanol after mixing 50ml, stir and add 5mlH 2 o 2 , heated up to 80°C in a stainless steel reactor and reacted for 30 minutes. After isopropanol and water were separated, the quality and sulfur content of the treated oil were measured. The result was an octane number of 93.3 (RON) and a sulfur content of 16.2 mg / L.

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Abstract

This invention discloses a catalytic oxidative desulfurization method for petroleum products. In the method, oxidant, catalyst and solvent are added in the petroleum products for desulfurization. The catalyst is oxyacid salt of Mn, Sb, W, Ce, Sn, Mo, V or Cr. The catalyst as well as reaction conditions are only effective to organic sulfur and nitrogen compounds while have no effect on unsaturated hydrocarbons such as olefins and aromatic hydrocarbons. After the desulfurization method, the content of sulfur in the petroleum products can be less than 15 mg / L, while the octane number of the petroleum products is not changed. The desulfurization method is simple, and has such advantages as mild reaction conditions and high desulfurization efficiency, thus has wide potential applications.

Description

technical field [0001] The invention relates to a method for oxidative desulfurization of petroleum products, in particular to a method for catalytic oxidative desulfurization of petroleum products. Background technique [0002] In a series of oil products (gasoline, diesel, kerosene, etc.) that use petroleum and natural gas as raw materials, the presence of sulfur and nitrogen compounds (content tens to 10,000ppm) is universal, and the application and further processing of oil products have produced Great negative impact. When oil is used as fuel, SO is produced x and NO x , lead to air pollution and acid rain, and lead to a series of irreversible disasters such as soil acidification. Therefore, various developed countries have formulated sustainable development strategies for this purpose, reducing SO x and NO x As the main control object to be restricted, for example, the United States will implement new fuel oil regulations in 2006, in which the sulfur content will b...

Claims

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Application Information

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IPC IPC(8): C10G27/00
Inventor 赵进才马万红陈春城籍宏伟张新志
Owner INST OF CHEM CHINESE ACAD OF SCI
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