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A method for removing sulfide in fuel oil by photooxidation

A technology of oxidative desulfurization and photooxidation, which is applied in the direction of refining oxygen-containing compounds, etc., can solve the problems of high cost of photosensitizer, complex catalyst synthesis process, and high toxicity of extractant, and achieve simple process flow, low cost, and high desulfurization rate Effect

Active Publication Date: 2016-02-10
泰州市海创新能源研究院有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method that uses ultraviolet light as the excitation source, isobutyraldehyde as the photosensitizer, and air or oxygen As an oxidant, a method of photooxidative desulfurization of fuel oil using green and cheap low-temperature eutectic salts as an extractant

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  • A method for removing sulfide in fuel oil by photooxidation

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Effect test

Embodiment 1

[0031] The sulfur content in the oil is 500ppm, add 3mL of low-temperature eutectic salt (choline chloride and acetic acid according to the ratio of the amount of substances is 1:2, synthesized by stirring for 3h in an oil bath at 80°C) into the reaction flask, 15mL For oil products, under the irradiation of a 300W high-pressure mercury lamp, stir with a magnetic stirrer, blow in air with an air pump at a flow rate of 5mL / min, add 250μL of isobutyraldehyde, and react at a temperature of 30°C for 3 hours. The oil is poured out, and the desulfurization rate reaches 98.2%.

Embodiment 2

[0033] The sulfur content in the oil was 500ppm, and 1.5mL of low-temperature eutectic salt (choline chloride and acetic acid were synthesized by stirring in an oil bath at 80°C for 3 hours at a ratio of 1:1 according to the amount of substances) was added to the reaction flask, 15mL of oil, under the irradiation of a 1000W high-pressure mercury lamp, stirred with a magnetic stirrer, introduced oxygen, the ventilation rate was 10mL / min, added 750μL of n-butyraldehyde, the reaction temperature was 20°C, and reacted for 6h. The oil is poured out, and the desulfurization rate reaches 98.0%.

Embodiment 3

[0035] The sulfur content in the oil is 500ppm, add 10mL of low-temperature eutectic salt (choline chloride and formic acid according to the ratio of the amount of substances is 1:2, synthesized by stirring for 3h in an oil bath at 80°C) into the reaction flask, 5mL For oil products, under the irradiation of a 100W high-pressure mercury lamp, stir with a magnetic stirrer, use an air pump to ventilate air at a rate of 10mL / min, add 200μL of benzaldehyde, and react at a temperature of 20°C for 0.5h. The oil is poured out, and the desulfurization rate reaches 94.5%.

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Abstract

The invention discloses a method for removing sulfides in fuel oil through photo oxidation. The method comprises the following steps: adding low-temperature codissolved salt and fuel oil into a reaction bottle, then adding a photosensitizer, pumping air or oxygen into a reaction system, taking a high-pressure mercury lamp as a light source for lighting oxidation sweetening, and adopting the dumping method to dump sulfur-free oil in the upper layer after reaction, wherein the low-temperature codissolved salt is a solution obtained in the way that choline chloride and organic acid are mixed at the ratio of 1: (1-2), the mixture is stirred under the oil bath condition at the temperature of 80 DEG C; the photosensitizer is an aldehydes material. According to the invention, under the room-temperature and normal-pressure conditions, air is taken as an oxidant, and sulfides in the fuel oil are oxidized into a sulfones material at a relatively low cost to be easily separated from an oil product, so that deep removal of sulfides in the fuel oil is finally realized.

Description

technical field [0001] The invention relates to a method for removing sulfides in fuel oil by photooxidation, which belongs to the field of oil refining in the petrochemical industry. Background technique [0002] Sulfur oxides (SO x ) is an important chemical in the global sulfur cycle. It coexists with water droplets and dust in the atmosphere. Due to the catalytic oxidation of iron and manganese in the particles, sulfuric acid mist is formed. In severe cases, soot-type smog events, such as the London smog event, or acid rain will occur. And the emission of sulfur compounds in automobile exhaust has become an important source of sulfur oxides in the atmosphere. [0003] For this reason, countries around the world have introduced regulations to limit the content of sulfur compounds in fuel oil. In the new version of the "World Fuel Charter", the requirements for grades Ⅲ~Ⅳ of motor gasoline specification are less than 30ppm and 10ppm respectively. NGOs in the United Sta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G27/04
Inventor 朱文帅李华明王超巢艳红蒋伟荀苏杭刘建军
Owner 泰州市海创新能源研究院有限公司
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