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A method for catalytic gasoline deep hydrodesulfurization

A technology of catalytic gasoline and deep hydrogenation, which is applied in the fields of hydrotreating process, petroleum industry, and hydrocarbon oil treatment, etc. It can solve the problems of poor adaptability of raw materials and different process flow, and achieve the reduction of octane number loss and good technical effect , the effect of low active metal content

Active Publication Date: 2015-11-18
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this method can also produce gasoline products with a sulfur content less than 10 μg / g, the raw material has poor adaptability, and the process flow is completely different from the idea of ​​the present invention

Method used

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  • A method for catalytic gasoline deep hydrodesulfurization

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Effect test

Embodiment 1

[0036] Catalytic gasoline is firstly subjected to a pre-fractionation tower to obtain light fractions and heavy fractions. The separation temperature of the light fractions and heavy fractions is 122°C; the light fractions are deodorized without alkali, and then enter the hydrogenation pre-fractionation tower for separation. The resulting light gasoline and The split temperature of medium gasoline is 66°C. The pre-hydrogenation reaction conditions are: hydrogen partial pressure 1.8MPa, volume space velocity 3.8h -1 , The reaction temperature is 178°C; the hydrodesulfurization reaction conditions are: hydrogen partial pressure 1.6MPa, volume space velocity 2.8h -1 , The reaction temperature is 285°C; the total hydrogen to oil volume ratio is 360:1. The alkali-free deodorization conditions are: the operating pressure of the reactor is 0.6MPa, the reaction temperature is 35°C, and the feed space velocity is 0.9h -1 , air / feed volume ratio 0.7. The properties of raw oil and tes...

Embodiment 2

[0039] Catalytic gasoline is firstly subjected to a pre-fractionation tower to obtain light fractions and heavy fractions. The separation temperature of the light fractions and heavy fractions is 118°C; the light fractions are deodorized without alkali, and then enter the hydrogenation pre-fractionation tower for separation. The resulting light gasoline and The split temperature of medium gasoline is 65°C. The prehydrogenation reaction conditions are: hydrogen partial pressure 2.0MPa, volume space velocity 3.5h -1 , The reaction temperature is 183°C; the hydrodesulfurization reaction conditions are: hydrogen partial pressure 1.8MPa, volume space velocity 3.0h -1 , The reaction temperature is 288°C; the total hydrogen to oil volume ratio is 380:1. The alkali-free deodorization conditions are: the operating pressure of the reactor is 0.5MPa, the reaction temperature is 45°C, and the feed space velocity is 0.8h -1 , air / feed volume ratio 0.6. The properties of raw oil and test...

Embodiment 3

[0042] Catalytic gasoline is firstly subjected to a pre-fractionation tower to obtain light fractions and heavy fractions. The separation temperature of the light fractions and heavy fractions is 121°C; the light fractions are deodorized without alkali, and then enter the hydrogenation pre-fractionation tower for separation. The resulting light gasoline and The split temperature of medium gasoline is 70°C. The pre-hydrogenation reaction conditions are: hydrogen partial pressure 1.8MPa, volume space velocity 4.2h -1 , The reaction temperature is 180°C; the hydrodesulfurization reaction conditions are: hydrogen partial pressure 1.6MPa, volume space velocity 3.2h -1 , The reaction temperature is 279°C; the total hydrogen to oil volume ratio is 320:1. ; The conditions for alkali-free deodorization are: the operating pressure of the reactor is 0.5MPa, the reaction temperature is 40°C, and the feed space velocity is 1.1h -1 , air / feed volume ratio 0.6. The properties of raw oil a...

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Abstract

The invention discloses a method used for catalytic gasoline deep hydrodesulfurization. The method comprises following steps: catalytic gasoline is delivered into a prefrationation tower firstly; an appropriate separation point is adopted, light gasoline fraction and middle gasoline fraction are discharged through the top of the prefrationation tower, and heavy gasoline fraction is discharged through the bottom of the prefrationation tower; the light gasoline fraction and the middle gasoline fraction are subjected to alkali-free deodorization, and are delivered into a hydrogenation prefrationation tower so as to separate light gasoline and middle gasoline, wherein catalytic cracking hot diesel oil extracted from a main fractionate tower side line is also delivered into the hydrogenation prefrationation tower; separated middle gasoline and heavy gasoline are mixed, and are subjected to selective hydrogenation, and an obtained distillate is mixed with light gasoline obtained via alkali-free deodorization so as to obtain clean gasoline products. Compared with existing catalytic gasoline hydrodesulfurization method, the method and equipment of the invention is capable of reducing energy consumption greatly, octane value loss of the gasoline products is less, sulfur content of the gasoline products is less than 10<mu>g / g, and economic benefits of oil refining enterprises are improved.

Description

technical field [0001] The invention relates to a method for deep hydrodesulfurization of catalytic gasoline, in particular to a method for hydrogenating catalytic gasoline as a raw material to produce clean gasoline blending components with a sulfur content less than 10 μg / g. Background technique [0002] With the increasingly stringent environmental protection regulations, developed countries such as Europe and the United States have successively put forward stricter regulations on the content of sulfur and olefins in motor gasoline. From 2009 onwards, the Euro V emission standard with a sulfur content of less than 10 μg / g will be implemented. my country's requirements for the sulfur content of motor gasoline are becoming more and more stringent. Since January 1, 2008, the gasoline supplied to Beijing has begun to implement the specifications equivalent to Euro IV emission standards, that is, the sulfur content is less than 50 μg / g, and Shanghai, Guangzhou Similar standard...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/02
Inventor 陈琳徐大海丁贺庞宏牛世坤
Owner CHINA PETROLEUM & CHEM CORP
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