Hydrocracking method

Abstract

This invention discloses a hydrocracking method.It includes that the heavy distillate oil and poor quality catalytic cracking diesel refining separately by hydrogenation, and the mixture enters into hydrocracking reactivator, then its cracking products is conducted gas liquid separation. Light naphtha, heavy naphtha, aviation kerosene, diesel oil and end oil will be obtained by distillating the liquid phase. The density of the poor quality catalytic cracking diesel oil is above 0.9g / ml, and the aromatic hydrocarbon is over 60wt% and the value of hexadecane is under 30. It is a adequate utilization of catalytic cracking craft to produce High aromatic hydrocarbon heavy naphtha and high quality end oil with heavy distillate oil and poor quality catalytic cracking diesel, which can be separately used as catalytic reforming material and making ethylene material by steam cracking method. High aromatic hydrocarbon heavy naphtha in this invention will produce a large amount of reforming hydrogen after catalytic reforming treatment, which can be used in the process of hydrocracking to make this preparation more ecnomical and reasonable.

Description

Technical field

[0001] The invention relates to a hydrocracking method, in particular to a hydrocracking method that can effectively treat poor-quality catalytically cracked diesel. Background technique

[0002] As crude oil becomes increasingly heavy and inferior, and the market's demand for heavy oil decreases, the demand for light oil increases, and the degree of deep conversion of heavy residues continues to increase. Among them, catalytic cracking is one of the important means to lighten heavy residues. However, the properties of products obtained by catalytic cracking are generally poor and require further processing to obtain qualified products. Diesel fractions obtained by catalytic cracking generally have the characteristics of high aromatics content, low cetane number, high sulfur and nitrogen content, etc., which are difficult to directly use as products, and it is difficult to effectively improve the quality of their products by normal processing methods.

[0003] At ...

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