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Method for producing sweet gasoline

A gasoline and heavy gasoline technology, applied in refining to remove heteroatoms, etc., can solve problems such as large loss of octane number, unqualified mercaptan sulfur, and generation of mercaptan sulfur.

Inactive Publication Date: 2005-10-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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
This method adopts the hydrogenation method to remove sulfur in the light fraction, but the disadvantage is that the hydrogenation process of the light fraction produces mercaptan sulfur
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 sweet gasoline

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Embodiment 1

[0036] Using FCC gasoline (FCCN) A as raw material, the raw material is first cut, the cutting point is 96 ° C, heavy gasoline fraction (HCN) accounts for 43.1% by weight of the raw material, the properties of gasoline full fraction, light gasoline fraction (LCN), and HCN are as follows Table 1 shows. HCN, hydrogen and catalyst RSDS-1 enter the first reactor for hydrodesulfurization reaction, the hydrodesulfurization process conditions are: hydrogen partial pressure 1.6MPa; reaction temperature 280 °C; liquid hourly space velocity 4.0h -1 ; Hydrogen oil ratio 400Nm 3 / m 3 . The resulting HCN hydrodesulfurization product is referred to as Product-1. Mix product-1 and LCN into the second reactor, contact with hydrogen and catalyst RSS-1A for hydrodemercaptanization, and the final product obtained is called product-2. The properties of Product-1 and Product-2 are shown in Table 2. It can be seen from Table 2 that after hydrodesulfurization of HCN, 46ppm of mercaptan sulfur s...

Embodiment 2

[0038] Using FCC gasoline B as the raw material, the raw material was first cut. The cutting point was 100°C. The heavy gasoline fraction accounted for 49.1% by weight of the raw material. The properties of the gasoline fraction, LCN, and HCN are shown in Table 2. HCN, hydrogen and catalyst RSDS-1 enter the first reactor for hydrodesulfurization reaction, the hydrodesulfurization process conditions are: hydrogen partial pressure 1.6MPa; reaction temperature 280 °C; liquid hourly space velocity 4.0h -1 ; Hydrogen oil ratio 400Nm 3 / m 3 . The resulting HCN hydrodesulfurization product is referred to as Product-3. Mix product-3 and LCN into the second reactor, contact with hydrogen and catalyst RSS-1A for hydrodemercaptanization, and the final product obtained is called product-4. The properties of Product-3 and Product-4 are shown in Table 4. It can be seen from Table 4 that after hydrodesulfurization of HCN, 40 ppm of mercaptan sulfur still remains in the product, which req...

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Abstract

A process for preparing low-sulfur oil comprises, slicing the gasoline raw material into light and heavy distillate, contacting the heavy fraction and hydrogen gas with hydrodesulphurization catalyst for selective hydrogenation desulfurizing reaction, mixing the exudates separated by hydrogenation produced oil through high pressure separator with the light distillate, and contacting the hydrogen gas and hydrodesulphurization alcohol catalyst for hydrogenation desulfurizing reaction, separating the reaction exudates to obtain lighter hydrocarbons and gasoline products, and circulating the hydrogen-rich gas.

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 combined application of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G45/02
Inventor 习远兵熊震霖石玉林胡云剑
Owner CHINA PETROLEUM & CHEM CORP