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Catalytic gasoline alkylation desulfuration method and device

A technology for catalytic cracking gasoline and alkylation desulfurization, which is applied in the petroleum industry, processing hydrocarbon oil, etc., can solve the problems of difficult operation, large temperature gradient, low intermediate temperature, etc. The effect of easing conditions

Inactive Publication Date: 2011-06-01
无锡蓝星石油化工有限责任公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the temperature at the upper and lower ends of the reactor used in this method is high, the middle temperature is low, and the temperature gradient is large, so the operation is not easy to realize.

Method used

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  • Catalytic gasoline alkylation desulfuration method and device
  • Catalytic gasoline alkylation desulfuration method and device

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Embodiment 1

[0026] A catalytic cracking gasoline alkylation desulfurization method, the method steps are as follows:

[0027] a. First fill the alkylation desulfurization catalyst in the alkylation reaction tower, then heat the catalytically cracked gasoline through a heat exchanger at a pressure of 0.2~1.0MPa to 50~110℃, and then increase the temperature at a liquid hourly volume space velocity of 0.5~ 6.0h -1 Introduce into the alkylation reaction tower, and carry out the alkylation reaction under the action of the alkylation desulfurization catalyst to generate alkylated gasoline;

[0028] b. Extract the alkylated gasoline from the top of the alkylation reaction tower, heat it up to 180-185°C through a heat exchanger, and then introduce it into the fractionation tower, where it is fractionated at 175-185°C and cut into low-sulfur light fractions and The sulfur-rich heavy fraction and the low-sulfur light fraction are alkylated desulfurized gasoline, which is extracted from the top of ...

Embodiment 2

[0032] Fill the Hβ molecular sieve alkylation desulfurization catalyst in the alkylation reaction tower, under the reaction pressure of 0.5MPa, the catalytic cracked gasoline with the sulfur content of 164μg / g is charged at a liquid hourly volume space velocity of 0.5h -1 It is input through the raw oil input pipe and sent to the heat exchanger of the alkylation reaction device. After heat exchange, the temperature of the catalytic cracked gasoline is raised to 50°C, and the alkylation reaction is carried out in the reaction tower to generate alkylated gasoline; The alkylated gasoline is extracted from the top of the alkylation reaction tower, enters the heat exchanger, and after heat exchange, it is cut into low-sulfur light fractions at 175~185°C - alkylated desulfurized gasoline and sulfur-rich gasoline The heavy fraction is extracted from the top of the fractionating tower, and the alkylated desulfurized gasoline is extracted from the top of the fractionating tower, and the...

Embodiment 3

[0036] Et 2 O-AlCl 3 It is an alkylation desulfurization catalyst, and catalytically cracked gasoline with a sulfur content of 505 μg / g is used as feedstock oil. According to the method described in Example 2, the reaction temperature is 50 ° C, the reaction pressure is 0.2 MPa, and the liquid hourly volume space velocity is 4.0 h. -1 Under the conditions of alkylation reaction, other steps are the same as steps in Example 2. The sulfur content of alkylated desulfurized gasoline was measured to be 127μg / g, the mass yield was 85.70%, and the desulfurization rate was 74.85%.

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Abstract

The invention relates to a catalytic gasoline alkylation desulfuration method and device. The method comprises the following steps: carrying out heat transfer on catalytic gasoline under the pressure of 0.2-1.0 MPa; heating to 50-110 DEG C, and then introducing the catalytic gasoline into an alkylation reaction tower at a liquid hour volume space velocity of 0.5-6.0 hour<-1>; carrying out alkylation reaction in the presence of an alkylation desulfuration catalyst, and introducing the alkylation gasoline after reaction into a fractionating column; fractionating the alkylation gasoline into a low-sulphur light fraction (alkylation desulfuration gasoline) and a sulphur-rich heavy fraction at the temperature of 175-185 DEG C; and recovering the alkylation desulfuration gasoline from the top of the fractionating column, and recovering the heavy fraction from the kettle of the fractionating column. By using the method provided by the invention, the octane value of the gasoline is maintained to be basically unchanged while the sulfide in the gasoline is removed; the method has the advantages of simple flow process, less equipment construction investment, low operation expense, mild operation condition and good desulfuration effect; and the process is easy to control, and the content of the sulphur in the alkylation desulfuration gasoline meets the national standard of motor gasoline.

Description

technical field [0001] The invention belongs to the technical field of gasoline alkylation desulfurization, and in particular relates to a method for producing low-sulfur and high-octane gasoline by catalytic cracking gasoline desulfurization and a device for realizing the method. Background technique [0002] The sulfides in gasoline mainly include mercaptan, sulfide, disulfide, thiophene and its derivatives, among which thiophene and its derivatives account for more than 80% of the total sulfur content. The sulfide in gasoline not only corrodes the equipment, but also poisons the catalyst, affecting the service life of the catalyst, and the SO in the combustion product 2 It is the main source of air pollution and the direct cause of acid rain [2] . Therefore, the sulfide content in motor gasoline must be strictly limited. At present, developed countries such as Europe and the United States have strictly limited the sulfur content in gasoline. my country has also promulg...

Claims

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Application Information

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IPC IPC(8): C10G57/00
Inventor 冯雪峰唐晓东金文中陈亮毛尽艳郭巧霞卿大咏
Owner 无锡蓝星石油化工有限责任公司
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