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Ultrasonic Catalytic Oxidative Extraction Desulfurization Process for Light Cycle Oil

A light cycle oil, catalytic oxidation technology, applied in the petroleum industry, only multi-stage serial refining process treatment, hydrocarbon oil treatment, etc., can solve the problems of affecting the quality of fuel oil, increasing production costs, poor removal effect, etc., to achieve production Low cost, improved stability, and easy operation

Active Publication Date: 2021-04-23
佛山市光烨环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] This patent provides a new idea for oxidative desulfurization, but it also has the following disadvantages: 1. It is necessary to use zinc phosphomolybdate catalyst, and the amount of catalyst added is 2% to 3% of the quality of the oil product to be treated, which greatly increases the production cost; 2. 1. Need to use acetonitrile as the extraction agent, and acetonitrile has certain toxicity; 3. Only remove thiophene sulfide, but the removal effect on mercaptan, sulfide and disulfide compound hydrogen sulfide in fuel is poor, which affects the fuel oil. the quality of

Method used

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  • Ultrasonic Catalytic Oxidative Extraction Desulfurization Process for Light Cycle Oil
  • Ultrasonic Catalytic Oxidative Extraction Desulfurization Process for Light Cycle Oil
  • Ultrasonic Catalytic Oxidative Extraction Desulfurization Process for Light Cycle Oil

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Effect test

Embodiment 1

[0032] A light circulating oil ultrasonic catalytic oxidation extraction desulfurization process, comprising the following steps:

[0033] (1) Ultrasonic ozone reaction: carry out ozone reaction under ultrasonic conditions after mixing methanol, sulfuric acid and light circulating oil to be desulfurized;

[0034] (2) High-voltage electric field sedimentation: Methanol and the light circulating oil after the ozone reaction are mixed, and then sedimentation is carried out under the condition of high-voltage electric field to remove the sediment;

[0035] (3) Extraction and extraction: the mixed solution after removing the precipitate is extracted and extracted, and the oily part is then added with methanol for extraction and extraction several times; then the oily part is extracted and extracted several times with methanol and caustic soda to obtain Refined light cycle oil;

[0036] (4) stripping and dealcoholization: stripping and dealcoholizing the refined light circulating o...

Embodiment 2

[0047] The difference between this embodiment and the above-mentioned Embodiment 1 is:

[0048] In the step (1), the amount of sulfuric acid used is 0.5% of the volume of the light circulating oil to be desulfurized, and the frequency of ultrasonic waves is 20KHz.

[0049] In the step (2), the amount of methanol used is 5% of the volume of the light circulating oil to be desulfurized, and the voltage of the high-voltage electric field is 20KV.

[0050] In the step (4), the temperature of stripping and dealcoholization is 120°C; in the step (Y), the temperature of methanol distillation and recovery is 95°C, and in the step (Z), the temperature of the spiral drying is 150°C .

Embodiment 3

[0052] The difference between this embodiment and the above-mentioned Embodiment 1 is:

[0053] In the step (1), the amount of sulfuric acid used is 0.6% of the volume of the light circulating oil to be desulfurized, and the frequency of ultrasound is 25KHz.

[0054] In the step (2), the amount of methanol used is 6% of the volume of the light circulating oil to be desulfurized, and the voltage of the high-voltage electric field is 25KV.

[0055] In the step (4), the temperature of stripping and dealcoholization is 125°C; in the step (Y), the temperature of methanol distillation and recovery is 100°C, and in the step (Z), the temperature of the spiral drying is 160°C .

[0056] The inspection index of the light circulating oil to be desulfurized by the raw material of the present invention is shown in the following table:

[0057]

[0058] The inspection index of the product desulfurized light circulating oil after the process desulfurization of the present invention is s...

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Abstract

The present invention relates to the technical field of light cycle oil desulfurization, in particular to a desulfurization process of light cycle oil by ultrasonic catalytic oxidation extraction, comprising the following steps: (1) Ultrasonic ozone reaction: mixing methanol, sulfuric acid and light cycle oil to be desulfurized Finally, ozone reaction is carried out under ultrasonic conditions; (2) high-voltage electric field sedimentation: after methanol and light cycle oil after ozone reaction are mixed, sedimentation is carried out under high-voltage electric field conditions to remove sediment; (3) extraction extraction: the The mixed solution after removing the precipitate is extracted and extracted to obtain refined light cycle oil; (4) stripping and dealcoholization: the refined light cycle oil is stripped and dealcoholized to obtain light cycle oil after dealcoholization oil; (5) Activated carbon adsorption: the de-alcoholized light cycle oil is adsorbed by activated carbon to obtain desulfurized light cycle oil. The process of the invention has strong desulfurization ability, high desulfurization efficiency, short reaction time, easy operation, good quality of desulfurized light circulating oil and low production cost.

Description

technical field [0001] The invention relates to the technical field of desulfurization of light circulating oil, in particular to an ultrasonic catalytic oxidation extraction desulfurization process of light circulating oil. Background technique [0002] SO produced by combustion of sulfur-containing compounds in fuel oil X , not only an important precursor for acid precipitation, but also SO x It is also an inhibitor of automobile exhaust gas reforming catalyst, which will reduce the effect of automobile exhaust gas reformer on NO. x , the conversion efficiency of incompletely combusted hydrocarbons (HC) and particulate matter (HPM). As the sulfur content required by environmental regulations becomes lower and lower, and crude oil becomes heavier and higher, the sulfur content of gasoline and diesel oil, especially diesel oil, has brought a lot of challenge. Therefore, the development of new, efficient and ultra-deep desulfurization methods has become the focus of resea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G53/14
CPCC10G53/14C10G2300/202C10G2300/70
Inventor 袁勇雷冲天
Owner 佛山市光烨环保科技有限公司
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