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A kind of desulfurization treatment method of catalytic cracking gasoline

A technology of catalytic cracking gasoline and treatment method, which is applied in the field of adsorption desulfurization process of various fractions of catalytic cracking gasoline, can solve the problems of large octane number loss, low desulfurization selective breakthrough sulfur capacity, etc., and achieve high strength and specific surface area, Reduces the effect of the hydrothermal treatment process

Active Publication Date: 2020-01-07
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0014] The technical problem to be solved by the present invention is to desulfurize FCC gasoline under mild operating conditions, especially suitable for the desulfurization treatment of FCC gasoline with high sulfur and high olefin content, and mainly solve the problems existing in the existing FCC gasoline reaction adsorption desulfurization technology. The desulfurization selectivity and breakthrough sulfur capacity are low, and the octane number loss is large

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  • A kind of desulfurization treatment method of catalytic cracking gasoline

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Effect test

Embodiment 1

[0054]Put the adsorption desulfurizer 1 into a 500mL fixed-bed adiabatic reactor. When the pressure is 0.8MPa, under the hydrogen atmosphere, the volume ratio of hydrogen to catalyst is 200:1 to establish a cycle, and the temperature is raised to 260 at a heating rate of 10°C / h. Stay at ℃ for 3 hours, raise the temperature to 300℃ and stay for 1h, raise the temperature to 350℃ and stay for 5h, raise the temperature to 410℃ and stay for 2h. The reaction process conditions are: reactor temperature 410°C, reaction pressure 1.2MPa, volume space velocity 6.5h -1 , the volume ratio of hydrogen to oil is 0.8; the desulfurization rate of the product is 93%, the octane number loss is 0.8 units, and the breakthrough sulfur capacity is 28%.

Embodiment 2

[0056] Put the adsorption desulfurizer 2 into a 1L fixed-bed adiabatic reactor. When the pressure is 0.8MPa, under the atmosphere of hydrogen-containing gas, the volume ratio of hydrogen to catalyst is 200:1 to establish a cycle, and the temperature rise rate is 10°C / h Raise the temperature to 260°C and stay for 3 hours, raise the temperature to 300°C and stay for 1 hour, raise the temperature to 350°C and stay for 5 hours, raise the temperature to 410°C and stay for 2 hours. The reaction process conditions are: reactor temperature 370°C, reaction pressure 0.8MPa, volume space velocity 5.8h -1 , the volume ratio of hydrogen to oil is 0.3; the desulfurization rate of the product is 96%, the octane number loss is 0.8 units, and the breakthrough sulfur capacity is 32%.

Embodiment 3

[0058] Put the adsorption desulfurizer 3 into a 200mL fixed-bed isothermal reactor. When the pressure is 0.8MPa, under the hydrogen atmosphere, the volume ratio of hydrogen to catalyst is 200:1 to establish a cycle, and the temperature is raised to 260 at a heating rate of 10°C / h. Stay at ℃ for 3 hours, raise the temperature to 300℃ and stay for 1h, raise the temperature to 350℃ and stay for 5h, raise the temperature to 410℃ and stay for 2h, after the pretreatment process is completed, adjust to the reaction process conditions, and enter the raw material 2 for reaction. The reaction process conditions are: reactor temperature 385°C, reaction pressure 0.8MPa, volume space velocity 7h -1 , the volume ratio of hydrogen to oil is 0.4; the desulfurization rate of the product is 90%, the octane number loss is 0.5 units, and the breakthrough sulfur capacity is 37%.

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Abstract

The invention relates to a desulphurization treatment method for catalytic cracking gasoline. A fixed bed reactor is adopted; and an adsorption desulfurizer comprises 40-85 wt% of zinc oxide containing gahnite, 10-35 wt% of nickel oxide and 0-25 wt% of molybdenum oxide. The specific surface area of the adsorption desulfurizer is 150-220 m<2> / g, and reaction adsorption desulphurization technology conditions are as follows: the reaction temperature being 300-450 DEG C, the reaction pressure being 0.5-3.0 MPa, the volume hourly space velocity being 2-10 h<-1>, and the hydrogen / oil volume ratio being 0.1-1.0. The method has the advantages of high desulphurization selectivity, high breakthrough sulfur capacity and high octane number loss.

Description

technical field [0001] The invention relates to a desulfurization treatment method of catalytic cracking gasoline, which is suitable for the adsorption desulfurization process of each fraction of catalytic cracking gasoline. Background technique [0002] Compared with foreign gasoline, the sources of gasoline in my country are complex and their properties are quite different, mainly in the content of sulfur and olefins, among which the content of sulfur is significantly higher than that of foreign countries. In order to improve the current situation of environmental pollution, it is particularly important to carry out research on deep desulfurization of gasoline in China and obtain an effective desulfurization method. Since about 70% of domestic gasoline is FCC gasoline, the key to domestic gasoline desulfurization lies in the desulfurization of FCC gasoline. At present, the desulfurization of catalytic cracked gasoline in my country is mainly through the hydrodesulfurizati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/06B01J20/30C10G25/00
CPCB01J20/06C10G25/003C10G2300/202C10G2400/02
Inventor 姚文君常晓昕吴杰李自夏高源冯琪李景锋初伟王廷海向永生王书峰黄德华
Owner PETROCHINA CO LTD
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