Method for desulfurizing and reducing olefine for gasoline

Abstract

The process of desulifurizing gasoline and reducing olefin content includes contacting gasoline material with hydrogen and hydrogen isomerization catalyst for hydrogen desulfurizing, saturating olefin, isomerizing olefin and cracking olefin; contacting the reaction effluent with selectively hydrogen desulfurizing catalyst; and separating hydrogen desulfurizing produced oil to obtain light olefin and gasoline fractions; and circulating the hydrogen-rich gas. The said process can produce high quality gasoline with low sulfur and olefin content and lowest octane number loss.

Description

technical field

[0001] The invention belongs to a method for refining hydrocarbon oil in the presence of hydrogen, more specifically, it belongs to a method for hydrodesulfurizing and reducing olefins of a gasoline fraction. Background technique

[0002] With the continuous enhancement of people's awareness of environmental protection, the emission of toxic and harmful substances in automobile exhaust will be strictly controlled, so the quality requirements for oil products used as engine fuels are becoming more and more stringent. For this reason, various countries have put forward extremely strict limit indicators for motor gasoline specifications such as oxygen content, vapor pressure, benzene content, total aromatics content, boiling point, olefin content and sulfur content, in order to reduce the emission of harmful substances. Comparing with the new standard of motor gasoline in my country, it can be found that the main problem of gasoline quality in my country is the ...

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