Catalytic gasoline deep hydrodesulfurization method

A technology for catalyzing gasoline and hydrodesulfurization, applied in hydrotreating process, petroleum industry, processing hydrocarbon oil, etc., can solve the problems of poor adaptability of raw materials and different process flow, so as to reduce investment and operating costs, and reduce energy consumption 、Technical solutions with mature and reliable results

Active Publication Date: 2015-09-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Catalytic gasoline deep hydrodesulfurization method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Gasoline is pre-separated in the fractionation tower of the catalytic cracking unit to obtain light fractions and heavy fractions. The separation temperature of the light fractions and heavy fractions is 125°C; the light fractions are deodorized without alkali, and then enter the hydrogenation pre-fractionation tower for separation. The division temperature of the obtained light gasoline and medium gasoline was 65°C.

[0042] Among them, 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 , an air / feed volume ratio of 0.7. The reaction conditions for prehydrogenation of distillates in catalytic gasoline are: hydrogen partial pressure 1.8 MPa, volume space velocity 3.8 h -1 , The reaction temperature is 178°C; the hydrodesulfurization reaction conditions of the distillate in catalytic gasoline are: hydrogen partial pressure 1.6MPa, volume space velocity 3....

Embodiment 2

[0045] Gasoline is pre-separated in the fractionation tower of the catalytic cracking unit to obtain light fractions and heavy fractions; the separation temperature of the light fractions and heavy fractions is 120°C; the light fractions are deodorized without alkali, and then enter the hydrogenation pre-fractionation tower for separation. The division temperature of the obtained light gasoline and medium gasoline is 70°C.

[0046] 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 0.8 h -1 , an air / feed volume ratio of 0.6. The reaction conditions for pre-hydrogenation of distillates in catalytic gasoline are: hydrogen pressure 2.0MPa, volume space velocity 3.8h -1 , The reaction temperature is 183°C; the hydrodesulfurization reaction conditions of the distillate in catalytic gasoline are: hydrogen partial pressure 1.8MPa, volume space velocity 3.2 h -1 , The reactio...

Embodiment 3

[0049] Gasoline is pre-separated in the fractionation tower of the catalytic cracking unit to obtain light fractions and heavy fractions; the division temperature of the light fractions and heavy fractions is 130°C; the light fractions are deodorized without alkali, and then enter the catalytic gasoline fractions for hydrogenation pre-fractionation The tower is separated, and the cut-off temperature of the obtained light gasoline and medium gasoline is 68°C.

[0050]The alkali-free deodorization conditions are: the operating pressure of the reactor is 0.5MPa, the reaction temperature is 40°C, and the feed space velocity is 1.1 h -1 , with an air / feed volume ratio of 1.0. The reaction conditions for the prehydrogenation of distillates in catalytic gasoline are: hydrogen partial pressure 1.8 MPa, volume space velocity 4.2 h -1 , The reaction temperature is 180°C; the hydrodesulfurization reaction conditions of the distillate in catalytic gasoline are: hydrogen partial pressure ...

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Abstract

The invention discloses a catalytic gasoline deep hydrodesulfurization method. The method comprises: adjusting the operating conditions of a catalytic device fractionating tower, adding a lateral line, adopting an appropriate cutting point to conduct cutting so as to obtain FCC (fluid catalytic cracking) gasoline light fractions at the tower top and FCC heavy fractions at the lateral line; subjecting FCC gasoline light fractions to alkali-free deodorization, and then separating light gasoline and medium gasoline through a hydrogenation prefractionator; and carrying out moderate selective hydrogenation on the medium gasoline, performing deep selective hydrogenation on the heavy gasoline, and mixing the obtained two parts of refined distillate oil with the light gasoline subjected to alkali-free deodorization, thus obtaining a clean gasoline product or a blending component. Compared with the existing catalytic gasoline hydrodesulfurization technologies, the method provided in the invention can significantly reduce equipment energy consumption, the gasoline octane number loss is small, the obtained gasoline product quality can meet the quality requirement for a sulfur content of less than 10 micrograms / g, and the 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 or 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, Guangzho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/00
Inventor 徐大海牛世坤丁贺李扬
Owner CHINA PETROLEUM & CHEM CORP
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