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Method for modifying poor gasoline

A low-quality gasoline and gasoline technology, applied in the petroleum industry, refined hydrocarbon oil, etc., can solve the problems of reforming catalyst movement, complicated regeneration process, and the inability to reduce olefin content and aromatic content, so as to reduce sulfur content and octane number without loss or added effect

Inactive Publication Date: 2005-03-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The above three patents can only remove sulfur in gasoline, but cannot reduce its olefin content and increase its aromatic content
[0011] At present, the main method for producing high-octane gasoline or producing aromatics is catalytic reforming. Although this method can effectively increase the octane number of gasoline or produce aromatics, the active components of the reforming catalyst used are noble metals, and the raw materials must be processed. Strict pretreatment, the movement and regeneration process of reforming catalyst are relatively complicated

Method used

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  • Method for modifying poor gasoline

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Embodiment 1

[0040] In this embodiment, only FCC gasoline is used as the reaction raw material, and no alkylating agent is added to the raw material. The catalyst used is composed of 60% by weight of HZSM-5 molecular sieve (the ratio of silicon to aluminum is 120) and the rest of the pseudo-boehmite carrier. . The FCC gasoline upgrading experiment was carried out on a small fixed bed device. The reaction conditions were: reaction temperature 360°C, reaction pressure 1.0MPa, weight space velocity 1.0h -1 . The reaction results are listed in Table 3. As can be seen from Table 3, the sulfur content in the gasoline product is 191.4ppm.

Embodiment 2

[0042] Compared with Example 1, in this example, an alkylating agent, that is, FCC liquefied gas, is added to the raw material, and the weight ratio of FCC liquefied gas to low-quality gasoline raw material is 0.083:1, and other conditions are the same as in Example 1. The reaction results are listed in Table 3. As can be seen from Table 3, the sulfur content in the gasoline product is reduced to 149.0ppm.

Embodiment 3

[0044] This example illustrates that the method provided by the present invention can deeply remove sulfur in FCC gasoline.

[0045] The weight ratio of FCC gasoline raw material to FCC liquefied gas as an alkylating agent is 12:1, and the catalyst is composed of 60% by weight of HZSM-5 zeolite (silicon-aluminum ratio of 30) and the balance of pseudo-boehmite carrier. The FCC gasoline upgrading experiment was carried out on a small fixed bed device. The reaction conditions were: reaction temperature 360°C, reaction pressure 1.0MPa, weight space velocity 1.0h -1 , the agent-to-oil ratio is 1. The reaction results are listed in Table 4. As can be seen from Table 4, the sulfur content in the gasoline product is only 11.4ppm, which can almost transfer all the thiophene sulfides in the raw material to the diesel fraction; at the same time, the olefins in the gasoline are significantly reduced to 10ppm. Below the weight %, the octane number increases obviously.

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Abstract

This invention provides a method for optimizing faulty gasoline. The raw material faulty gasolineand alkylation agent are fed into reactor to contact with acidic molecular sieve, at temp. of 100-450 deg.c, under pressure of 0.1-5.0 MPa, with weight space-rate of 5.0-20 / h-1. After the reaction, the effluent is separated to obtain super low sulfur content gasoline, increasing octane-value of the product gasoline, aromatic hydrocarbon content increased to 40-90 wt.%, liquid product yield being 90% or more.

Description

technical field [0001] The present invention relates to a process for the refining of hydrocarbon oils in the absence of hydrogen. More specifically, it is a method of upgrading inferior gasoline. Background technique [0002] Catalytic cracking (hereinafter referred to as FCC) process is one of the main methods for refineries to produce gasoline and diesel. It is a process of converting macromolecular hydrocarbon raw materials into light products under the action of a catalyst. The reaction temperature is generally 450 ° C ~ 650 ° C. ℃, the products are generally dry gas, gasoline, diesel (ie light cycle oil) and heavy cycle oil. The proportion of FCC gasoline in the gasoline pool is very high, especially in my country, the proportion is as high as more than 80% by weight. With the increasingly stringent environmental protection requirements on the quality of gasoline for vehicles, it is becoming more and more important to improve the quality of FCC...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G29/20
Inventor 许昀张久顺龙军杨永坛
Owner CHINA PETROLEUM & CHEM CORP