A method for preparing gasoline high-octane number blending components from coking by-products

Abstract

The invention relates to a method for preparing a gasoline high-octane rating blending component by coking byproducts. The method comprises the steps of carrying out hydrogenation reaction on coking byproducts of coal tar light oil heavy fraction, dephenolization oil and heavy benzene in a fixed bed reactor of a hydrogenation catalyst, cooling the reaction product and separating gas from liquid of the reaction product so as to obtain the product oil, separating a little benzene and heavy fraction, thereby finally obtaining the gasoline high-octane rating blending component. The method reasonably uses the byproducts which are generated in recycling and processing of coking chemical products, are small in quantity, have the similar components and are difficult to purify and separate to the greatest extent, prevents the byproducts from polluting the environment and corroding the equipment in conventional treatment and use, can obtain low-sulfur and high-aroma gasoline high-octane rating blending component, and effectively relieves the pressure on demand of gasoline products. The method for preparing the gasoline high-octane rating blending component by coking byproducts is a clean, high value-added and novel technology.

Description

technical field [0001] The invention relates to a blending method for preparing gasoline components from coking by-products, in particular to a method for preparing high-octane gasoline blending components with high added value by using a hydroisomerization process. Background technique [0002] At present, the main component of gasoline in my country is catalytic cracking (FCC) gasoline, and its olefin content is as high as 40% to 50%, far exceeding the requirement of not more than 24% of olefins in the National V standard for motor gasoline, and FCC gasoline has high sulfur and high content. The characteristics of alkene and low aromatics, and more importantly, the hydrodesulfurization will lead to a significant drop in the octane number, which is not high. In addition, with the rapid development of my country's coal chemical industry, the output of coal tar and crude benzene in coking enterprises has gradually increased, and the utilization of scraps generated in the recov...

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Problems solved by technology

All three have high sulfur content and poor stability. When used as fuel, they not only cause environmental pollution but also waste precious resources.

Although this method improves the added value of medium and low temperature coal tar to a certain extent, it is only suitable for the processing of medium and low temperature coal tar. will inevitably increase the cost

[0006] CN101712888B discloses "a heavy benzene hydrogenation refining process". After heavy benzene is filtered, it is mixed with hydrogen and passed through a hydrogenation device for hydrogenation refining to obtain the target product industrial naphthalene and solvent oil. This method improves the utilization of heavy benzene resources to a certain extent , but the added value of the product is still low

[0009] Comparing petroleum straight run oil and catalytic cracking oil, coking by-products such as light oil heavy fraction, dephenolized phenolic oil, and heavy benzene have the advantages of similar components, high aromatic content, low olefin content, and many high-octane components , but its composition is complex, there is a certain amount of unsaturated components, and the stability is poor; it also contains a certain amount of S, N, O heteroatom compounds, which will corrode equipment and pollute the environment

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