Pretreatment method of residual oil hydrogenation raw material and residual oil hydrogenation method

Abstract

The invention relates to the technical field of residual oil hydrogenation process, in particular to a pretreatment method of a residual oil hydrogenation raw material and a residual oil hydrogenationmethod. The pretreatment method of a residual oil hydrogenation raw material includes the steps of: carrying out cavitation treatment on residual oil subjected to mild hydrotreatment; and the mild hydrotreatment method includes: treating the residual oil raw material at a temperature of 300-350DEG C and under a pressure of 2-5MPa; the cavitation treatment is carried out at a temperature of 90-150DEG C and under a pressure of 2-20MPa. The method provided by the invention performs mild hydrotreatment and cavitation treatment on the residue oil to improve the composition structure and distribution state of the residual oil components, the obtained residual oil has reduced average relative molecular mass and significantly reduced carbon residue and viscosity, also the residual oil can be further subjected to hydrogenation reaction, the light oil yield can be substantially improved, and the coke yield is reduced.

Description

technical field [0001] The invention relates to the technical field of residual oil hydrogenation technology, in particular to a pretreatment method for residual oil hydrogenation raw material and a residual oil hydrogenation method. Background technique [0002] With the increasing shortage of crude oil at home and abroad and the acceleration of heavy and inferior crude oil, it has become a long-term trend to produce more light oil products in the process of crude oil processing. As an effective technical means to realize efficient and clean utilization of residue oil, residue Oil hydrogenation plays a pivotal role in increasing the yield of light oil and improving the utilization rate of crude oil. In order to improve the yield and quality of light oil in the hydrogenation process of residual oil to a greater extent, scholars at home and abroad have conducted a lot of research and proposed many improvement methods. [0003] Prior art 1 discloses a method for hydrogenation...

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Problems solved by technology

The third prior art discloses a pretreatment method that uses ultrasonic treatment to improve the lightening performance of residual oil. It mainly uses the cavitation and composite effects of ultrasonic waves to change the colloidal structure of residual oil and improve the distribution of four components to achieve residual oil The overall improvement in quality has significantly improved the hydrogenation effect of residual oil, but it is more difficult to industrialize the overall process

[0004] At present, the methods for improving the yield of light oil products in the hydrogenation process of residual oil are all focused on optimizing the reaction conditions of hydrogenation of residual oil, such as: reaction temperature, pressure, space velocity and changing the catalyst, and less light oil is used for residual oil. performance preprocessing

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