Method for producing high-octane gasoline

Abstract

The invention provides a method for producing high octane gasoline by aromatization reaction of a mixed raw material of catalytic gasoline and C4, and catalyst on an aromatization reactor after the mixed raw material contacts the catalyst. The method is as follows: the catalytic gasoline is mixed with the C4 olefin, and the mixed raw material enters into a fixed bed aromatization reactor or a simulated moving bed aromatization reactor which is filled with the molecular sieve catalyst, contacts the aromatizing catalyst, and undergoes olefin aromatization reaction, wherein the reaction conditions are as follows: the reaction temperature is between 250 and 340 DEG C; the pressure is between 0.5 and 3.0 MPa; the weight space velocity is between 0.5 and 10h<-1>; the mass ratio of the C4 olefin to the catalytic gasoline is between 90 to 10 and 2 to 98; and active ingredients of a molecular sieve carrier of the catalyst are one or more than one among rare earth element, No. 4B element and No. 8 element, and the weight of the active ingredients is 0.01 to 10 percent of that of the carrier. The method can obviously reduce the olefin content of the raw gasoline, effectively improve the octane number, and achieve the aim of production of the clean high-octane gasoline.

Description

technical field [0001] The invention provides a method for producing high-octane gasoline by contacting the mixed raw materials of catalytic cracking gasoline and C4 olefins with a catalyst on an aromatization reactor for aromatization reaction. Background technique [0002] With the increasing awareness of environmental protection and the approaching of the "Green Olympics" in 2008, my country's requirements for gasoline standards are becoming more and more stringent, and the olefin content in gasoline has also been clearly limited. More than 80% of the catalytic cracking gasoline in my country has an olefin content of over 40% and an aromatic content of only about 10%, mainly using high-octane gasoline such as alkylated gasoline (iso-octane) or reformed gasoline (rich in aromatics fractions) However, the production capacity of olefin-free high-octane gasoline blending components in my country is very limited (catalytic reforming + isomerization + alkylation + etherification...

AI Technical Summary

Problems solved by technology

[0009] BP and UOP have jointly developed a very representative light hydrocarbon aromatization process: Cyclar process (USP4642402), which uses mixed hydrocarbons as raw materials for aromatization to generate aromatics. The structuring product liquid yield is low (60%), and the cost of the catalyst is relatively high because it contains gallium

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