Selective hydrogenation desulfurization method for gasoline

A hydrodesulfurization and selective technology, applied in the petroleum industry, refined hydrocarbon oil, etc., to achieve the effect of small loss of octane number

Active Publication Date: 2008-12-03
CHINA PETROLEUM & CHEM CORP +1
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AI Technical Summary

Problems solved by technology

In this method, when the desulfurization rate of gasoline is high, the olefin saturation rate is lower than 30%, and the antiknock index loss of gasoline is lower than 2 units, but the sulfur content of the gasoline product obtained by this method is greater than 50 μg / g

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] This embodiment adopts the same raw material oil A and the same cut point of 75°C as Comparative Example 1, and the resulting light gasoline fraction (LCN-1) and heavy gasoline fraction (HCN-1) account for 34.7% by weight and 65.4% by weight of the raw material respectively. %. The LCN-1 is subjected to alkaline elution of mercaptans, and HCN-1 is mixed with hydrogen to carry out selective hydrodesulfurization reaction under the action of catalyst C1 and catalyst C2. The loading volume ratio of catalyst C1 and catalyst C2 is 4:6, and the reaction produces The product is cooled and separated to obtain a hydrogenated gasoline fraction, and the obtained hydrogenated gasoline fraction is oxidatively sweetened. The hydrogenated gasoline fraction after sweetening is blended with the light gasoline fraction after sweetening to obtain a gasoline product. The hydrogenation process conditions and the properties of the hydrogenated gasoline fraction are shown in Table 2, and the ...

Embodiment 2

[0058] In this example, the same raw material oil B as in Comparative Example 2 was used. After the raw material oil B was mixed with hydrogen, the selective hydrodesulfurization reaction was carried out under the action of the catalyst C1 and the catalyst C2. The loading volume ratio of the catalyst C1 and the catalyst C2 was 3: 7. The reaction product is cooled and separated to obtain a hydrogenated gasoline fraction, and the obtained hydrogenated gasoline fraction is oxidatively sweetened to obtain a gasoline product. The hydrogenation process conditions and the properties of the resulting gasoline products are shown in Table 5.

[0059] It can be seen from Table 5 that the sulfur content of the gasoline product obtained in this example is only 31 μg / g, which is a gasoline product whose sulfur content meets the Euro IV emission standard. Compared with Comparative Example 2, under the same other reaction conditions, when the desulfurization rate reaches 95.0%, the reaction t...

Embodiment 3

[0065] With a kind of catalytic gasoline as raw material C, the raw material C is cut, and the cutting point is 60 DEG C, and the light gasoline fraction (LCN-2) and the heavy gasoline fraction (HCN-2) of gained account for respectively 36.1% by weight of raw material and 63.9% by weight, and its properties are shown in Table 6. The LCN-2 is subjected to alkaline elution of mercaptans. After HCN-2 is mixed with hydrogen, under the action of catalyst C1 and catalyst C2, the hydrogen partial pressure is 1.6MPa and the liquid hourly space velocity is 3.0h. -1 , Hydrogen oil ratio 350Nm 3 / m 3 , under the condition of a reaction temperature of 310°C, the selective hydrodesulfurization reaction is carried out, the loading volume ratio of the catalyst C1 and the catalyst C2 is 3:7, the reaction product is cooled and separated to obtain a hydrogenated gasoline fraction, and the resulting hydrogenated gasoline The fraction is oxidatively sweetened. The hydrogenated gasoline fractio...

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Abstract

A gasoline selective hydrodesulfurization method comprises the following steps: mixing full-range gasoline and/or heave gasoline distillate with hydrogen, carrying out selective hydrodesulfurization reaction in the presence of hydrodesulfurization catalyst I and hydrodesulfurization catalyst II, and cooling and separating the resultants to obtain hydrogenated gasoline distillate, wherein the heavy gasoline distillate is obtained by cutting full-range gasoline at a cutting temperature of 50 to 75 DEG C, and the hydrodesulfurization catalyst I and hydrodesulfurization catalyst II are VIB-group metal and/or VIII-group non-noble metal catalysts loaded on aluminum and/or silica-alumina carrier. The method can be used for processing catalytic cracking gasoline to obtain gasoline product with sulfur content meeting EuroIV emission standard or even meeting EuroV emission standard, and the gasoline product has less octane number loss and RON loss less than 2.0.

Description

technical field [0001] The invention belongs to a method for refining hydrocarbon oil in the presence of hydrogen, more specifically, a method for selective hydrodesulfurization of gasoline. Background technique [0002] As we all know, air pollution is a serious environmental problem, and a large number of engine emissions are one of the important causes of air pollution. In recent years, in order to protect the environment, countries around the world have put forward stricter restrictions on the composition of engine fuel in order to reduce the emission of harmful substances. Among them, the restrictions on the sulfur content in gasoline are particularly severe. my country's motor gasoline standards are also gradually in line with the world. Following the implementation of Euro II emission standards nationwide on July 1, 2005, it is planned to further upgrade the quality of motor gasoline to National III standards on December 31, 2009 (equivalent to According to Euro III ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G45/10
Inventor 屈锦华胡云剑高晓冬习远兵李明丰褚阳
Owner CHINA PETROLEUM & CHEM CORP
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