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Catalytic gasoline 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 material oil, large loss of octane number, etc., to reduce equipment investment and operating costs, The effect of lower energy consumption, lower investment and operating costs

Active Publication Date: 2015-07-22
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 adaptability of feedstock oil is poor, and the octane number loss is also large, and the process flow is very different from that of the present invention

Method used

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  • Catalytic gasoline hydrodesulfurization method

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Experimental program
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Effect test

Embodiment 1

[0040] 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 125°C; the light fractions are subjected to alkali extraction, and then enter the hydrogenation pre-fractionation tower for separation. The division temperature of the obtained light gasoline and medium gasoline was 65°C. Among them, the prehydrogenation reaction conditions of the distillate 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 3.0h -1 , The reaction temperature is 248°C, the total hydrogen to oil volume ratio is 350:1; the catalytic gasoline heavy fraction hydrodesulfurization reaction conditions are: hydrogen partial pressure 1.7MPa, v...

Embodiment 2

[0043] 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 120°C; the light fractions are subjected to alkali extraction, and then enter the hydrogenation pre-fractionation tower for separation, The division temperature of the obtained light gasoline and medium gasoline is 70°C. Among them, the prehydrogenation reaction conditions of the distillate in catalytic gasoline are: hydrogen partial 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 reaction temperature is 246°C; the total hydrogen-to-oil volume ratio is 380:1; the catalytic gasoline heavy fraction hydrodesulfurization reaction conditions are: hydrogen partial pressure 1.7MPa, vol...

Embodiment 3

[0046] 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 subjected to alkali extraction, and then enter the fractions in catalytic gasoline for hydrogenation pre-fractionation The tower is separated, and the cut-off temperature of the obtained light gasoline and medium gasoline is 68°C. Among them, the pre-hydrogenation reaction conditions of the distillate 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 1.6MPa, volume space velocity 3.2 h -1 , The reaction temperature is 252°C; the total hydrogen to oil volume ratio is 320:1; the catalytic gasoline heavy fraction hydrodesulfurization reaction condition...

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Abstract

The invention discloses a catalytic gasoline hydrodesulfurization method. The method comprises: adjusting the operating conditions of a catalytic device fractionating tower, adding a lateral line, conducting cutting at an appropriate cutting temperature so as to obtain light fractions at the tower top and heavy fractions at the lateral line; subjecting the light fractions to an alkali extraction treatment, and then separating light gasoline and medium gasoline through a hydrogenation prefractionator; and carrying out moderate selective hydrodesulfurization on the medium gasoline, and carrying out deep selective hydrodesulfurization on the heavy gasoline, subjecting the obtained two refined products to gas stripping, and then mixing them with alkali extracted light gasoline, thus obtaining a clean gasoline product. 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 substantially improved.

Description

technical field [0001] The invention relates to a catalytic gasoline hydrodesulfurization method, in particular to a method for hydrogenating catalytic gasoline as a raw material to produce a clean gasoline blending component 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 standards will be g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/00
Inventor 徐大海关明华丁贺李士才
Owner CHINA PETROLEUM & CHEM CORP
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