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Deep hydrodesulfurization method for catalytic gasoline

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, so as to reduce investment and operating costs and reduce energy consumption , Reduce equipment investment and operating costs

Active Publication Date: 2015-01-14
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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  • Deep hydrodesulfurization method for catalytic gasoline

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 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 73°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. The prehydrogenation reaction conditions are: hydrogen partial pressure 1.8MPa, volume space velocity 3.8 h -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 282°C; the total hydrogen to oil volume ratio is 350:1.

[0038] 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 , the air flow / feed volume ratio is 0...

Embodiment 2

[0041] 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 76°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 62°C. The prehydrogenation reaction conditions are: hydrogen partial pressure 2.0 MPa, volume space velocity 3.5 h -1 , The reaction temperature is 183°C; the hydrodesulfurization reaction conditions are: hydrogen partial pressure 1.8MPa, volume space velocity 3.0 h -1 , The reaction temperature is 288°C; the total hydrogen to oil volume ratio is 380:1.

[0042] 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 , the air flow / feed volume ratio is 0...

Embodiment 3

[0045] 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 80°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 67°C. The prehydrogenation reaction conditions are: hydrogen partial pressure 1.8MPa, volume space velocity 4.2 h -1 , Reaction temperature 180℃; hydrodesulfurization reaction conditions: hydrogen partial pressure 1.6MPa, volume space velocity 3.2 h -1 , The reaction temperature is 277°C; the total hydrogen to oil volume ratio is 320:1.

[0046] 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 , the air flow / feed volume ratio is 1.0. The oper...

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Abstract

The invention discloses a deep hydrodesulfurization method for catalytic gasoline. The method comprises: adjusting the operating conditions of a catalytic device fractionating tower, adding a lateral line, and adopting an appropriate cutting point to perform cutting so as to obtain light fractions at the tower top and heavy fractions at the lateral line; subjecting the light fractions to alkali-free deodorization, then passing the deodorized light fractions through a hydrogenation prefractionator to separate light gasoline and medium gasoline; and subjecting the separated medium gasoline and the heavy fractions to selective hydrogenation, and mixing the refined product 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 has the advantages that: the equipment energy consumption is significantly reduced, the gasoline octane number loss is small, the 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 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): C10G67/00
Inventor 徐大海刘继华李扬牛世坤
Owner CHINA PETROLEUM & CHEM CORP
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