Catalyst conversion method for producing high-octane gasoline by using crude oil

Abstract

The invention provides a catalytic conversion method for producing high-octane gasoline by using crude oil, which comprises: contacting pretreated crude oil serving as raw material oil with a catalyst which contains macroporous zeolite and is distributed according to a coarse particle size in a catalytic conversion reactor to perform a reaction according to reaction temperature, oil gas dwell time and catalyst to raw material oil weight ratio, which are proper enough to enable the reaction to obtain a reaction product containing catalytic wax oil which accounts for 15 to 60 percent of the weight of the raw material oil, wherein the weight hourly space velocity is 25 to 100h<-1>, the reaction temperature is 450 to 600 DEG C, and he weight ratio of the catalyst to the raw material oil is 1 to 30. In the method, while low-quality crude oil is converted into high-octane gasoline, the dry gas and coke yields are reduced considerably, the high-efficient utilization of oil resources is realized, and the higher particle uniformity of the catalyst makes the local temperature distribution in a regeneration process more uniform and the breakage orientation of the catalyst lowered correspondingly.

Description

technical field [0001] The invention relates to a method for catalytic conversion of crude oil, in particular to a method for converting heavy crude oil into high-octane gasoline while greatly reducing dry gas and coke yields so as to realize efficient utilization of petroleum resources. Background technique [0002] With the development of the economy, the number of gasoline vehicles in the world is increasing year by year, so the demand for high-quality gasoline is increasing. Catalytic cracking (FCC) gasoline has good anti-knock performance and is one of the main sources of motor gasoline. [0003] The production of FCC gasoline generally uses straight-run vacuum distillate (VGO) as raw material and blends some residues such as atmospheric residue (AR) and vacuum residue (VR). Heavy raw materials such as residual oil contain high content of heavy metals such as residual carbon, sulfur, nitrogen, nickel, and vanadium. In order to improve the feed properties of these cata...

AI Technical Summary

Problems solved by technology

However, this method has many disadvantages such as poor gasoline properties and high energy consumption.

[0004] In addition, the octane number of the heavy fraction of catalytic cracked gasoline is low, which affects the octane number of gasoline; the quality of catalytic cracked diesel oil is poor, but the catalytic cracked diesel oil contains more single-ring aromatics. If the single-ring aromatics in diesel oil are converted As a gasoline component, it is conducive to the increase of gasoline yield and at the same time can improve the octane number of gasoline

Therefore, the existing technology does not fully utilize the gasoline octane number and the gasoline potential content in diesel oil, and there is room for improvement in gasoline yield and quality

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