A kind of pretreatment method of residual oil hydrogenation raw material and method for residual oil hydrogenation

Abstract

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. The pretreatment method of residual oil hydrogenation raw material in the present invention, comprises the following steps: carry out cavitation treatment to the residual oil of gentle hydrogenation treatment; The method for described mild hydrogenation treatment comprises: the residual oil raw material is heated at a temperature of 300 -350°C and a pressure of 2-5MPa; the temperature of the cavitation treatment is 90-150°C and the pressure is 2-20MPa. In the present invention, the composition structure and distribution state of the residual oil components are improved by performing mild hydrogenation treatment and cavitation treatment on the residual oil, and the average relative molecular weight of the obtained residual oil is reduced, and the carbon residue and viscosity are significantly reduced. Moreover, after the residual oil is further hydrogenated, the yield of light oil is greatly increased, and the yield of coke 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...

Examples

Embodiment 1

[0051] A kind of residual oil hydrogenation feedstock pretreatment method, comprises the following steps:

[0052] (a) preheating the vacuum residue at 100°C;

[0053] (b) carrying out mild hydrotreating to the preheated residual oil, the pressure of mild hydrotreating is 2MPa, the temperature is 300°C, and the time is 40min;

[0054] (c) Carrying out cavitation treatment to the residual oil after mild hydrotreating, the cavitation device used in the cavitation treatment is a Venturi tube type cavitation device; the temperature of the cavitation treatment is 90°C, and the pressure is 2MPa;

[0055] A method for hydrogenation of residual oil, comprising the following steps: hydrogenating the residual oil after cavitation treatment, the temperature of the hydrogenation reaction is 420° C., the pressure is 10 MPa, and the reaction time is 1.5 h.

Embodiment 2

[0057] A kind of residual oil hydrogenation feedstock pretreatment method, comprises the following steps:

[0058] (a) carry out gentle hydrotreating to residual oil, the pressure of gentle hydrotreating is 5MPa, temperature is 350 ℃, time is 20min;

[0059] (b) Cavitation treatment is carried out on the residual oil after mild hydrotreatment. The cavitation device used in the cavitation treatment is a throttling orifice cavitation device. The temperature of the cavitation treatment is 150° C. and the pressure is 4 MPa.

[0060] A method for hydrogenation of residual oil, comprising the following steps: hydrogenating the residual oil after cavitation treatment, the temperature of the hydrogenation reaction is 390° C., the pressure is 9 MPa, and the reaction time is 1.5 h.

Embodiment 3

[0062] A kind of residual oil hydrogenation feedstock pretreatment method, comprises the following steps:

[0063] (a) preheating the vacuum residue at 100°C;

[0064] (b) carrying out mild hydrotreating to the preheated residual oil, the pressure of mild hydrotreating is 2.5MPa, the temperature is 310°C, and the time is 25min;

[0065] (c) Cavitation treatment is carried out on the residual oil after mild hydrotreatment. The cavitation device used in the cavitation treatment is a throttling orifice cavitation device. The temperature of the cavitation treatment is 150° C. and the pressure is 20 MPa.

[0066] A method for hydrogenation of residual oil, comprising the following steps: hydrogenating the residual oil after cavitation treatment, the temperature of the hydrogenation reaction is 400° C., the pressure is 9 MPa, and the reaction time is 1.5 h.

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...

Examples

Embodiment 1

[0051] A kind of residual oil hydrogenation feedstock pretreatment method, comprises the following steps:

[0052] (a) preheating the vacuum residue at 100°C;

[0053] (b) carrying out mild hydrotreating to the preheated residual oil, the pressure of mild hydrotreating is 2MPa, the temperature is 300°C, and the time is 40min;

[0054] (c) Carrying out cavitation treatment to the residual oil after mild hydrotreating, the cavitation device used in the cavitation treatment is a Venturi tube type cavitation device; the temperature of the cavitation treatment is 90°C, and the pressure is 2MPa;

[0055] A method for hydrogenation of residual oil, comprising the following steps: hydrogenating the residual oil after cavitation treatment, the temperature of the hydrogenation reaction is 420° C., the pressure is 10 MPa, and the reaction time is 1.5 h.

Embodiment 2

[0057] A kind of residual oil hydrogenation feedstock pretreatment method, comprises the following steps:

[0058] (a) carry out gentle hydrotreating to residual oil, the pressure of gentle hydrotreating is 5MPa, temperature is 350 ℃, time is 20min;

[0059] (b) Cavitation treatment is carried out on the residual oil after mild hydrotreatment. The cavitation device used in the cavitation treatment is a throttling orifice cavitation device. The temperature of the cavitation treatment is 150° C. and the pressure is 4 MPa.

[0060] A method for hydrogenation of residual oil, comprising the following steps: hydrogenating the residual oil after cavitation treatment, the temperature of the hydrogenation reaction is 390° C., the pressure is 9 MPa, and the reaction time is 1.5 h.

Embodiment 3

[0062] A kind of residual oil hydrogenation feedstock pretreatment method, comprises the following steps:

[0063] (a) preheating the vacuum residue at 100°C;

[0064] (b) carrying out mild hydrotreating to the preheated residual oil, the pressure of mild hydrotreating is 2.5MPa, the temperature is 310°C, and the time is 25min;

[0065] (c) Cavitation treatment is carried out on the residual oil after mild hydrotreatment. The cavitation device used in the cavitation treatment is a throttling orifice cavitation device. The temperature of the cavitation treatment is 150° C. and the pressure is 20 MPa.

[0066] A method for hydrogenation of residual oil, comprising the following steps: hydrogenating the residual oil after cavitation treatment, the temperature of the hydrogenation reaction is 400° C., the pressure is 9 MPa, and the reaction time is 1.5 h.

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