Catalytic conversion method for petroleum hydrocarbon

Abstract

The invention relates to a catalytic conversion method for petroleum hydrocarbon. According to the method, raw oil contacts a catalyst in a reactor to carry out a reaction, wherein the catalyst is rich in mesoporous zeolite; a cracking reaction is performed under the following conditions: a reaction temperature is 500-750 DEG C, weight hourly space velocity is 100-800 h<-1>, reaction pressure is 0.10-1.0 MPa, a weight ratio of the catalyst to the raw oil is 1:100, a weight ratio of water vapour to the raw oil is 0.05:1.0; the spent catalyst and the reaction oil gas are separated; the spent catalyst is subjected to regeneration, and returns to the reactor, the reaction oil gas is separated to obtain a product, wherein the product comprises ethylene, propylene, propane, butane and arene-rich catalytic gasoline; the catalytic gasoline is subjected to selective hydrogenation, and enters an arene extraction apparatus to separate to obtain the target product of light arene; the raffinate oil, the propane and the butane are subjected to steam cracking to further produce ethylene and propylene. With the method provided by the present invention, the yields of the ethylene and the propylene are respectively 20.31 wt% and 31.67 wt%, the yield of BTX is 24.39 wt%.

Description

technical field [0001] The present invention provides a petroleum hydrocarbon catalytic conversion method on the basis of the prior art, especially a method for converting heavy raw materials into low-carbon olefins such as ethylene and propylene, and simultaneously producing light aromatics, so as to realize efficient utilization of petroleum resources. Background technique [0002] Ethylene is one of the most important basic raw materials in the petrochemical industry. Through ethylene polymerization, alkylation with benzene, and addition reaction with water, oxygen, and halogen, a series of extremely valuable derivatives can be obtained. The world ethylene industry continues to maintain a steady development trend. It is estimated that from 2007 to 2012, the world will add 38.78 million tons of ethylene capacity per year, with an average annual growth rate of 5.6%. By 2012, the world's ethylene production capacity will reach 162.67 million tons per year. At present, about...

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Problems solved by technology

[0014] There are two deficiencies in the above-mentioned prior art: one is that the potential content of aromatics in gasoline is not fully utilized while producing low-carbon olefins; the other is that the technology for producing low-carbon olefins and light aromatics fails to fully utilize hydrocarbon resources, especially There is still a lot of room for improvement in the yield and quality of light aromatics

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