Catalytic conversion method for preparing propone and high-octane number gasoline

Abstract

The invention provides a catalysis conversion method used for preparing propylene and high octane gasoline; raw material which is difficult to be cracked contacts a thermal regeneration catalyst; the cracking reaction is carried out under the conditions of 600-750 DEG C of temperature, 100-800h<-1> of weight hourly space velocity, 0.10-1.0MPa of pressure, 30-150 of weight ratio of catalyst to raw material and 0.05-1.0 of weight ratio of water vapour to raw material; the reaction matter flow is mixed with the raw oil which is easy to be cracked and the cracking reaction thereof is carried out under the condition of 450-620 DEG C of temperature, 0.1-100h<-1> of weight hourly space velocity, 0.10-1.0MPa of pressure, 1.0-30 of weight ratio of catalyst to raw material and 0.05-1.0 of weight ratio of water vapour to raw material; after spent catalyst is separated from reaction oil gas, the spent catalyst enters a stripper and is returned to a reactor after being stripped, burned and regenerated; the reaction oil gas is separated so as to gain the object outcome: propylene, high octane gasoline and re-cracked raw material; the re-cracked raw material comprises distillate with the distillation range of 180-260 DEG C and heavy aromatic raffinate oil. The method greatly increases the yield and selection of propylene, obviously improves the yield and octane of the gasoline and leads the reduction range of yield of the dry gasoline to achieve more than 80% by weight.

Description

technical field [0001] The invention belongs to the catalytic conversion method of hydrocarbon oil in the absence of hydrogen, more specifically, it is a catalytic conversion method for converting heavy raw materials into light olefins, especially propylene and high-octane gasoline. Background technique [0002] Low-carbon olefins such as ethylene and propylene are important organic chemical raw materials, among which propylene is a synthetic monomer for products such as polypropylene and acrylonitrile. With the rapid growth of demand for derivatives such as polypropylene, the demand for propylene is also increasing year by year. The demand in the world propylene market has increased from 15.2 million tons 20 years ago to 51.2 million tons in 2000, with an average annual growth rate of 6.3%. It is estimated that the demand for propylene will reach 86 million tons by 2010, with an average annual growth rate of about 5.6%. [0003] The methods for producing propylene are mai...

AI Technical Summary

Problems solved by technology

[0010] The above-mentioned prior art still has deficiencies in the design of the alkane molecular cracking reaction, resulting in a substantial increase in the dry gas yie

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