Method for producing reforming feedstock by light and medium gasoline distillates

Abstract

The invention relates to a method for producing catalytic reformed feedstock by taking light and medium gasoline distillates as raw materials and extracting selective solvent to extract and rectify catalytically cracked gasoline in the absence of hydrogen. The method comprises the following steps: 1, fractionation prefabrication of light and medium distillate raw materials of catalytically cracked gasoline; and 2, extraction, rectification, desulfuration and dearomatization of light and medium distillates of catalytically cracked gasoline, wherein light and medium distillates of catalyticallycracked gasoline obtained in step 1 are fed into the middle-lower part of an extraction-rectification tower, while fresh extraction agent or recycled extraction agent is added from the upper part of the extraction-rectification tower; thus, the light and medium distillates contact the extraction agent inside the tower to generate desulfurized and dearomatized light-component raffinate phase (i.e.catalytic reformed feedstock product) rich in olefin hydrocarbon at the top of the tower after extraction, rectification, desulfuration and dearomatization. The method carries out desulfuration and dearomatization of catalytically cracked gasoline at the same time and reclaims solvent, thereby having the advantages of simple process, moderate operation conditions, hydrogen source saving and low production cost.

Description

technical field [0001] The invention relates to a process for refining catalytic cracking gasoline with selective solvent extraction and rectification in the absence of hydrogen, specifically a method for producing catalytic reforming raw materials by using gasoline light and middle distillates as raw materials. Background technique [0002] Catalytic reforming is an important refining process for producing high-octane gasoline and light aromatics (BTX aromatics) from gasoline (mainly straight-run gasoline). Catalytically reformed gasoline is an important component of unleaded high-octane gasoline. Catalytic reforming plays an important role in solving the current problem of increasing gasoline consumption and producing clean gasoline. It also provides benzene-toluene-xylene mixture (BTX) raw materials for petrochemicals to meet the downstream product PTA The growth needs of hydrogenation and provide a large amount of cheap hydrogen source for the development of hydrogenati...

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a kind of method that uses gasoline light middle fraction as raw material to produce catalytic reforming raw material, and it is the technology that produces catalytic reforming raw material through extraction and rectification with catalytic cracking gasoline light middle fraction as raw material, and this technique is through simple At the same time, the FCC gasoline is desulfurized and dearomatized, and the solvent is recovered, so as to overcome the shortcomings of the existing catalytic reforming raw material production technology, such as complex process, harsh operating conditions, and large consumption of hydrogen sources

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