Catalytic conversion method for producing high-octane petrol from crude oil

Abstract

The invention discloses a catalytic conversion method for producing high-octane petrol from crude oil. The catalytic conversion method comprises the following step of: blending and reacting pretreated crude oil serving as raw material oil and a large pore zeolite-containing catalyst in a catalytic conversion reactor, wherein a reaction temperature, an oil gas retention time and a weight ratio of the catalyst to the raw material oil are enough to obtain a reaction product which contains catalytic wax oil which accounts for 15 percent to 60 percent of the raw material oil; the weight houly space velocity is 25 to 100 hour <-1>; the reaction temperature is between 450 and 600 DEG C; and the weight ratio of the catalyst to the raw material oil is 1 to 30. While inferior crude oil is conversed into high-octane petrol by the method, the production rate of dry gas and coke is highly reduced, so that highly effective utilization of an oil resource is achieved.

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 catalytic cracking gasoline and diesel oil 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...

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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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