Oil oxidation-extraction desulfurization technique based on ionic liquid composite solvent
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A technology of ionic liquid and composite solvent, applied in the field of desulfurization of oil products, can solve the problems of high viscosity, large loss of desulfurizing agent, high residual content of ionic liquid, etc.
Inactive Publication Date: 2008-09-10
INST OF PROCESS ENG CHINESE ACAD OF SCI
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Problems solved by technology
However, this kind of method has the disadvantages of low desulfurization efficiency, large amount of ionic liquid, high viscosity, high residual content of ionic liquid in the oil, which affects the quality of the oil, and high desulfurization cost, so it is difficult to get better application in industry.
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Examples
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Effect test
Embodiment 1
[0015] Add 3ml of [Bmim][PF 6 ] mixed with 2ml of polyethylene glycol 400, added to 10ml of simulated gasoline containing sulfur (thiophene) 1500ppm, stirred under normal pressure, when the temperature was raised to 60°C, added 2ml of H 2 o 2 and 1ml of acetic acid, magnetically stirred for 3 hours, allowed to stand, layered, and detected by gas chromatography, the sulfur content in the oil could be reduced to 22ppm. After use, the gasoline is separated, the solvent layer is distilled under reduced pressure, and the recovered solvent can be reused.
Embodiment 2
[0017] Add 3ml of [Dmim][PF 6 ] mixed with 2ml of polyethylene glycol 400, added to 10ml of simulated gasoline containing sulfur (thiophene) 1500ppm, stirred under normal pressure, when the temperature was raised to 60°C, added 2ml of H 2 o 2 and 1ml of acetic acid, stirred by magnetic force for 3 hours, allowed to stand, layered, and detected by gas chromatography, the sulfur content in the oil can be reduced to 10ppm. After use, the gasoline is separated, the solvent layer is distilled under reduced pressure, and the recovered solvent can be reused.
Embodiment 3
[0019] Add 4ml of [Dmim][PF 6 ] mixed with 1ml of polyethylene glycol 400, added to 10ml of simulated gasoline containing sulfur (thiophene) 1500ppm, under normal pressure stirring, when the temperature was raised to 60°C, 1ml of H 2 o 2 and 0.5ml of acetic acid, after magnetic stirring for 3 hours, let stand, separate layers, and detect with gas chromatography, the sulfur content in the oil can be reduced to 6ppm. After use, the gasoline is separated, the solvent layer is distilled under reduced pressure, and the recovered solvent can be reused.
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PUM
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Abstract
The invention relates to a new method of desulfurization for oil products and solvent recovery, comprising the following steps of: oxidizing sulfide in the oil products by organic or inorganic peroxide, then compositing imidazole ionic liquid and alcohols or alcamines and alcohols derivate or alcamines derivate according to a definite proportion, which are used as desulfurizer, and extracting and removing the oxide of organic sulfur or inorganic sulfur in the oil products. At the same time, the added ironic liquid has the advantages of designable structure and polarity, so the new method can improve the desulfurization degree above 98 percent, after desulphurizinig heavy oil with higher boiling point, performing the solvent recovery by back-extracting alcohols, alcamines, ethers, nitriles with lower boiling point and the derivates of alcohols, alcamines, ethers and nitriles, while light oil with lower boiling point can perform the solvent recovery by means of reduced pressure distillation.
Description
Technical field: [0001] The present invention relates to oxidizing the sulfide in the oil product under catalytic oxidation conditions, then compounding the ionic liquid and the organic solvent to form an extraction desulfurizer to extract the sulfide in the oil product, and then recovering the extractant for repeated use A new method for oil desulfurization. Background technique: [0002] With the depletion of crude oil resources and the increasingly fierce market competition, the blending ratio of high-sulfur crude oil has increased year by year, and the sulfur content of FCC feedstock oil has also increased, resulting in the continuous increase of sulfur content in subsequent refined oil. Therefore, desulfurization of oil products The problem is increasingly pressing. Therefore, research on low-cost and high-efficiency methods to reduce the sulfur content of oil products has become an urgent task for my country's oil refining industry. [0003] As a green solvent, ionic...
Claims
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Application Information
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