Catalytic cracking and catalytic gasoline hydrogenation combined process

A catalytic gasoline and catalytic cracking technology, which is applied in the fields of hydrotreating process, petroleum industry, and hydrocarbon oil treatment, can solve the problems of poor adaptability of raw materials and different technological processes, so as to reduce energy consumption, mature and reliable technical solutions, and reduce The effect of plant modification investment and operating costs

Active Publication Date: 2015-06-17
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 cracking and catalytic gasoline hydrogenation combined process

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The FCC gasoline 1 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 the heavy fractions is 125°C; the light fractions undergo alkali-free deodorization, and then enter the hydrogenation pre-fractionation tower for processing After separation, the separation temperature of light gasoline and medium gasoline obtained is 65°C.

[0048] The conditions for alkali-free deodorization are: reactor operating pressure 0.6MPa, reaction temperature 35°C, feed space velocity 0.9h -1 , The air / feed volume ratio is 0.7. The pre-hydrogenation reaction conditions of the fractions in catalytic gasoline are: hydrogen partial pressure 1.8MPa and volumetric space velocity 3.8 h -1 The reaction temperature is 178℃; the hydrodesulfurization reaction conditions of the distillate in catalytic gasoline are: hydrogen partial pressure 1.6MPa, volumetric space velocity 3.0h -1 ...

Embodiment 2

[0051] The FCC gasoline 2 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 undergo alkali-free deodorization, and then enter the hydrogenation pre-fractionation tower for processing The separation temperature of the obtained light gasoline and medium gasoline is 70°C.

[0052] The conditions for alkali-free deodorization are: reactor operating pressure 0.5MPa, reaction temperature 45°C, and feed space velocity 0.8 h -1 , The air / feed volume ratio is 0.6. The pre-hydrogenation reaction conditions of the fractions in catalytic gasoline are: hydrogen partial pressure 2.0MPa, volumetric space velocity 3.8h -1 The reaction temperature is 183℃; the hydrodesulfurization reaction conditions of the distillate in catalytic gasoline are: hydrogen partial pressure 1.8MPa, volumetric space velocity 3.2 h -1 , Reaction tempe...

Embodiment 3

[0055] The FCC gasoline 3 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 130°C; the light fractions undergo alkali-free deodorization, and then enter the catalytic gasoline fractions for hydrogenation The pre-fractionation tower performs separation, and the separation temperature of light gasoline and medium gasoline obtained is 68°C.

[0056] The conditions for alkali-free deodorization are: reactor operating pressure 0.5MPa, reaction temperature 40℃, and feed space velocity 1.1 h -1 , The air / feed volume ratio is 1.0. The pre-hydrogenation reaction conditions of the distillate in catalytic gasoline are: hydrogen partial pressure 1.8MPa, volumetric space velocity 4.2 h -1 The reaction temperature is 180℃; the hydrodesulfurization reaction conditions of the distillate in catalytic gasoline are: hydrogen partial pressure 1.6MPa, volumet...

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Abstract

The invention discloses a catalytic cracking and catalytic gasoline hydrogenation combined process. The process comprises: adjusting the operating conditions of an FCC (fluid catalytic cracking) device fractionating tower, and conducting cutting pre-separation on FCC gasoline in the fractionating tower to obtain light fractions and heavy fractions; subjecting the light fractions to alkali-free deodorization, then leaving the light fractions and thermocatalytic diesel oil to enter a hydrogenation prefractionator together to separate light gasoline and medium gasoline; and making the medium gasoline pass a prehydrogenation reactor and a hydrodesulfurization reactor in order to perform moderate selective hydrogenation, subjecting the heavy fractions to deep selective hydrogenation, and mixing the two parts of refined distillate oil with the refined light gasoline so as to obtain a clean gasoline product or a blending component. According to the process provided in the invention, the equipment energy consumption is reduced significantly, the gasoline octane number loss is small, and the gasoline product quality can meet quality requirement for a sulphur content of less than 10 micrograms / g, and the economic benefits of oil refining enterprises can be improved.

Description

Technical field [0001] The invention relates to a combined process method of catalytic cracking and catalytic gasoline hydrogenation, specifically a method for hydrogenating catalytic gasoline as a raw material to produce clean gasoline with a sulfur content of 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 legislated more and more stringent regulations on the sulfur and olefin content in motor gasoline. From 2009, the Euro V emission standard for sulfur content less than 10μg / g will be implemented. my country’s requirements for the sulfur content of motor gasoline are becoming more and more stringent. Starting from January 1, 2008, gasoline supplied to Beijing began to implement specifications equivalent to Euro IV emission standards, that is, the sulfur content is less than 50μg / g, Shanghai and Guangzhou Other major domestic cities w...

Claims

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Application Information

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