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Method for producing low sulfur gasoline

A gasoline and heavy gasoline technology, applied in the petroleum industry, processing hydrocarbon oil, refining hydrocarbon oil, etc., can solve problems such as unqualified mercaptan sulfur and large octane number loss

Inactive Publication Date: 2005-10-26
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

The disadvantage is that most of the remaining sulfur compounds in the final product are mercaptan sulfur compounds, resulting in unqualified mercaptan sulfur in the product
Hydrodesulfurization of domestic FCC gasoline using the above-mentioned existing technology, the olefin saturation is too much, resulting in a large loss of octane number

Method used

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  • Method for producing low sulfur gasoline

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Embodiment 1

[0038] Compared with the comparative example, the difference is that the traditional hydrodesulfurization catalyst CH-18 is used under the same raw material, hydrogen partial pressure, liquid hourly space velocity, and hydrogen-to-oil ratio. The process conditions and properties of the heavy gasoline fraction after hydrogenation are shown in Table 2. It can be seen from Table 2 that to achieve the same desulfurization depth, this embodiment is 10°C lower than that of the comparative example, but the olefin saturation rate is only 29.01%, which is 29.77 percentage points lower than that of the comparative example. It shows that the performance of the catalyst of the present invention is far superior to that of the traditional hydrogenation catalyst. At the same time, the sulfur content of the heavy gasoline fraction after hydrogenation is only 82ppm. The properties of gasoline products after hydrogenation of heavy gasoline fractions and light gasoline fractions are listed in T...

Embodiment 2

[0040] Using FCC gasoline B as the raw material, the raw material is first cut, the cutting point is 100°C, and the heavy gasoline fraction accounts for 49.1% by weight of the raw material. The properties of the heavy gasoline fraction are shown in Table 1. The heavy gasoline fraction and hydrogen are contacted with catalyst RSDS-1 for hydrodesulfurization. The process conditions and properties of the heavy gasoline fraction after hydrogenation are shown in Table 2. It can be seen from Table 2 that when the hydrodesulfurization rate is as high as 94.79%, the olefin saturation rate is only 26.63% by weight. The sulfur content of the heavy gasoline fraction after hydrogenation is only 76ppm. The properties of gasoline products after hydrogenation of heavy gasoline fractions and light gasoline fractions are listed in Table 3. It can be seen from Table 3 that the loss of anti-knock index of gasoline whole fractions, that is, the final gasoline product, is only 1.2 units.

[0041...

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Abstract

The method for producing low-sulfur gasoline includes the following steps: cutting gasoline raw material into light fraction and heavy fraction, making the light fraction undergo the processes of alkali refinement treatment and removing mercaptans, making the heavy fraction and hydrogen gas together by contacted with hydrogenation desulfurization catalyst to make selective hydrogenation desulfurization reaction, then hydrogenated gasoline fraction undergo the process of hydrogenation or non-hydrogenation to remove mercaptans, then mixing the above-mentioned desulfurized light and heavy fractions so as to obtain the invented gasoline product whose olefine saturation rate is less than 30%, and sulfur content is less than 200 ppm.

Description

technical field [0001] The present invention pertains to a process for refining hydrocarbon oils in the presence of hydrogen, and more particularly to a process for the hydrogenation of gasoline fractions. Background technique [0002] As people's awareness of environmental protection continues to increase, the specifications of motor gasoline indicators such as oxygen content, vapor pressure, benzene content, total aromatics content, boiling point, olefin content and sulfur content will become more and more stringent, especially sulfur content. At present, 90-99% of the sulfur in domestic finished gasoline comes from catalytic cracking (FCC) gasoline. Therefore, reducing the sulfur content of FCC gasoline is the key to reducing the sulfur content of finished gasoline. There are many methods for producing low-sulfur gasoline abroad, mainly including FCC raw material hydrogenation pretreatment (pre-hydrogenation), FCC gasoline post-treatment and the co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/14
Inventor 李大东胡云剑石玉林戴立顺习远兵李明丰石亚华
Owner CHINA PETROLEUM & CHEM CORP
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