Hydrocracking method

Abstract

This invention relates to a hydrocracking method. Poor quality catalytic cracking diesel is conducted hydrocracking at first, then the mixture of the cracking product, VGO and so on enters the second hydrocracking reacting region, and then various light products and hydrogenation end oil are segregated. The related Poor quality catalytic cracking diesel is catalytic cracked from heavy, dregs oil, especially from catalytic cracking with hydrogen transfer technology. Its quality features are high density, high content of aromatic hydrocarbon and low value of hexadecane. Comparing with present technology, this invention combines poor quality catalytic cracking diesel and VGO organicly. High quality chemical materials which contain high aromatic hydrocarbon heavy naphtha and low BMCI value end oil can be maximumly produced by eligible preparation and operating conditions.

Description

technical field

[0001] The invention relates to a hydrocracking method, in particular to a hydrocracking method capable of effectively treating inferior catalytic cracking diesel oil. Background technique

[0002] As crude oil becomes heavier and inferior, and the market demand for heavy oil decreases and the demand for light oil increases, the degree of deep conversion of heavy residual oil continues to increase. Among them, catalytic cracking is one of the important means of lightening heavy residue oil. However, the properties of the products obtained by catalytic cracking are generally poor, and generally require further treatment to obtain qualified products. The diesel fraction obtained from catalytic cracking generally has the characteristics of high aromatics content, low cetane number, high sulfur and nitrogen content, and it is difficult to directly use it as a product, and it is difficult to effectively improve its product quality by ordinary processing methods. ...

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