Technical flow of hydrogenation of gasolene through catalytic cracking full distillate

Abstract

This invention discloses a method for hydrogenating fully catalytically cracked (FCC) gasoline. The method comprises: performing heat exchange between the reaction product and a mixture of FCC gasoline and liquid hydrocarbon, introducing into a TMD three-stage reactor, reacting at 320-420 deg.C under 1.5-6.0 MPa in the presence of hydrogen and F0-3558FCC hydrogenation catalyst, separating and stabilizing to obtain the gasoline product. The temperature increase of the reacting bed can be controlled by injecting either cold hydrogen or quenching oil corresponding to the highest temperature of M section in the reactor not higher than 15 deg.C or higher than 15 deg.C. The method can provide clean and environmentally friendly gasoline product, and has such advantages as simple process, stable operation, low energy consumption and no need for separating light and heavy fractions of FCC gasoline.

Description

technical field [0001] The invention belongs to the technical field of gasoline refining in petrochemical industry, and relates to a process flow of catalytic cracking full fraction gasoline hydrogenation upgrading. Background technique [0002] Gasoline, as the main petroleum product and the main raw material of automobile engines, is currently being affected by the dual factors of environmental protection and automobile technology progress. Major western countries such as Europe and the United States have successively introduced new Euro III and Euro IV gasoline standards, and 12 developed countries have taken the lead in adopting Euro III gasoline standards. New standard for IV gasoline. my country's standards for the control of harmful substances in unleaded gasoline have begun to implement, and the olefin content is not more than 35% (v). From July 1, 2005, my country's gasoline products will adopt the Euro III standard. [0003] Due to historical development, catalyt...

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Problems solved by technology

The above-mentioned technology also has shortcomings, that is, when the product requires a large reduction in olefins, the loss of too much octane number cannot be avoided, and hydrogenation of saturated olefins will also greatly increase hydrogen consumption, and the process is more complicated

CN1597865A and CN200410074058.7 proposed a process method for hydrodesulfurization and olefin reduction of full-fraction FCC inferior gasoline. This method has the advantages of simple process, easy operation, full use of reaction heat, prolonged catalyst operation period, and relatively high liquid yield , low hydrogen consumption, etc., but the gasoline octane number and liquid recovery have not yet reached the ideal value

The above technologies all describe the process methods and catalysts in detail, but there is no or little description of the process flow

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