Low energy consumption catalytic gasoline hydrodesulfurization method

A catalytic gasoline and hydrodesulfurization technology, which is applied in the fields of hydrotreating process, petroleum industry, and hydrocarbon oil treatment, can solve the problems of large octane number loss and poor adaptability of feedstock oil, etc., and reduce energy consumption and equipment investment And operating costs, technical solutions mature and reliable effect

Active Publication Date: 2015-08-12
CHINA PETROLEUM & CHEM CORP +1
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  • 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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  • Low energy consumption catalytic gasoline hydrodesulfurization method

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Effect test

Embodiment 1

[0040] The gasoline raw material 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 heavy fractions is 125°C; the light fractions undergo hydromercaptan conversion and then enter hydrogenation pre-fractionation The tower is separated, and the cut-off temperature of the obtained light gasoline and medium gasoline is 65°C. Among them, the conversion reaction conditions of hydrogen mercaptans are: hydrogen partial pressure 2.0 MPa, volume space velocity 4.8 h -1 , The reaction temperature is 148°C, the volume ratio of hydrogen to oil is 12; the reaction conditions of hydrodesulfurization of 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; the catalytic gasoline heavy fraction hydrodesulfurization reaction conditions are:...

Embodiment 2

[0044] The gasoline raw material 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 undergo hydromercaptan conversion and then enter the hydrogenation pre-fractionation tower Separation is carried out, and the cut-off temperature of gained light gasoline and medium gasoline is 70 ℃. The reaction conditions for the conversion of hydrogen mercaptans are: hydrogen partial pressure 2.2 MPa, volume space velocity 5.4 h -1 , the reaction temperature is 157°C, the volume ratio of hydrogen to oil is 18; the reaction conditions of hydrodesulfurization of 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; the catalytic gasoline heavy fraction hydrodesulfurization reaction conditions are:...

Embodiment 3

[0048] The gasoline raw material 3 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 undergo hydrogen mercaptan conversion, and then enter the catalytic gasoline fraction Separation is carried out in the hydrogenation pre-fractionation tower, and the division temperature of the obtained light gasoline and medium gasoline is 68°C. Among them, the conversion reaction conditions of hydrogen mercaptans are: hydrogen partial pressure 1.8 MPa, volume space velocity 4.5 h -1 , the reaction temperature is 152°C, and the volume ratio of hydrogen to oil is 12; the reaction conditions for hydrodesulfurization of fractions 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; the catalytic gasoline hea...

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Abstract

The invention discloses a low-energy consumption catalytic gasoline hydrodesulfurization method. The method comprises: adjusting the operating conditions of a catalytic device fractionating tower, conducting pre-separation on FCC (fluid catalytic cracking) gasoline in the fractionating tower so as to obtain light fractions at the tower top and heavy fractions at a lateral line; subjecting mercaptan in the light fractions to hydroconversion into a heavy sulfide, leaving the treated light fractions to enter a hydrogenation prefractionator to fractionate light gasoline and medium gasoline; carrying out moderate selective hydrodesulfurization on the medium gasoline, performing deep selective hydrodesulfurization on the heavy gasoline, subjecting the obtained two refined products to gas stripping, and then mixing them with the light gasoline undergoing mercaptan hydroconversion, 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 of a sulfur content of less than 10 micrograms / g, and the economic benefits of oil refining enterprises are improved obviously.

Description

technical field [0001] The invention relates to a method for hydrodesulfurization of catalytic gasoline with low energy consumption, 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, Gua...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/00
Inventor 徐大海关明华李扬
Owner CHINA PETROLEUM & CHEM CORP
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