Hydrogenation modification method of faulty gasoline

Abstract

A process for hydromodifying the poor-quality gasolinge(full-fraction FCC gasoline) features that under existence of H2 and in the condition that the temp is gradually raised, said gasoline is in contact with three catalysts to form 3 reaction regions. In the first low-temp region, the hydrorefining catalyst is used for removing biolefine. In the second higher-temp region, the modifying catalyst is used for increasing octane value and quality. In the third high-temp region, the selective hydrodesulfurizing catalyst is used for removing organic sulfide.

Description

technical field [0001] The invention relates to a method for upgrading low-quality gasoline, in particular to a method for hydrogenation and upgrading of low-quality gasoline such as full fraction FCC gasoline. Background technique [0002] The sustained development of the national economy has driven the rapid development of the automobile industry and the transportation industry. At the same time, the harmful substances emitted by automobile exhaust have become the biggest public hazard of serious air pollution in cities. With the continuous enhancement of people's awareness of environmental protection, the voice of protecting the earth's ecological environment on which human beings depend and creating a blue sky is getting louder and louder. The implementation of new vehicle exhaust emission control standards has put forward higher requirements for both vehicle and fuel production. For this reason, many countries in the world have put forward higher and higher standards f...

AI Technical Summary

Problems solved by technology

The desulfurization function of this process is poor, and it is not suitable for gasoline with high sulfur content

If the hydrodesulfurization step is added later, since the usual hydrofining catalyst needs to be operated at a lower temperature (generally below 300°C), and the temperature of modification reactions such as isomerization is relatively high (generally around 400°C), it must be Adding an independent reactor will greatly increase equipment investment and operating costs, and will further saturate the olefins in the product, reduce the octane number of gasoline products, and increase hydrogen consumption