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Inferior crude oil lightweighting method

A technology of low-quality raw oil and lightening, which is applied in the fields of hydrocarbon oil cracking, petroleum industry, processing of hydrocarbon oil, etc., can solve the problem that low-quality raw oil cannot be efficiently converted into light distillate oil, etc., so as to avoid catalyst deactivation and improve yield. Efficient and efficient processing effect

Active Publication Date: 2017-05-10
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to address the deficiencies in the prior art, to solve the problem that inferior raw material oil including deoiled asphalt and / or high aromatic components (ethylene tar, catalytic cracking re-refining oil and catalytic cracking oil slurry, etc.) cannot be efficiently converted into light The Distillate Problem

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Examples

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preparation example Construction

[0079] The method of the present invention has no special limitation on the preparation method of the hydrogenation catalyst, which can be prepared by conventional methods such as impregnation method in this field, and the present invention will not repeat them here.

[0080]After the hydrogenation catalyst and the inferior raw material oil are evenly mixed, they enter the slurry bed reactor together for hydrocracking reaction. After the reaction system is balanced, the high-density tail oil flowing out of the bottom flow pipe of the hydrocyclone is thrown out of the reaction system. Remove the partially deactivated hydrogenation catalyst in the hydrocracking reaction system of the slurry bed reactor at a certain rate, and at the same time replenish fresh hydrogenation catalyst to the raw material at the same rate, so that the catalyst content in the slurry bed reactor remain within the foregoing scope of the invention.

[0081] The inferior raw material oil of the present inv...

Embodiment 1-3

[0111] The hydrogenation catalysts used in Examples 1-3 are the same, and are Mo-based supported catalysts. The specific composition is: in terms of active metals, the Mo (average particle diameter is 45nm) content is 10% by weight, and the rest is carrier activated carbon. The average particle diameter of the hydrogen catalyst was 100 μm.

[0112] The consumption amount of the hydrogenation catalyst is shown in Table 2 in terms of the metal content in the hydrogenation catalyst per g of the inferior raw material oil.

[0113] The low-quality feedstock oils used in Examples 1-3 are the same, deoiled bitumen A and Zhenhai catalytic cracking oil slurry in a weight ratio of 7:3.

[0114] The fixed-bed hydroprocessing unit used in the experiments in Examples 1-3 is a single-reactor small-scale fixed-bed hydroprocessing unit, which is filled with protection catalyst, demetallization catalyst, desulfurization catalyst and denitrogenation catalyst in sequence. The grade of the hydrop...

Embodiment 4-5

[0134] Embodiment 4-5 adopts the method identical with embodiment 2 to carry out hydrocracking reaction, difference is, the reaction temperature in described fixed-bed hydroprocessing unit is different from that in embodiment 2, specifically as in table 5 shown.

[0135] table 5

[0136] Example 4 Example 5 Reaction conditions Pressure / MPa 14.0 14.0 temperature / ℃ 390 410 Liquid hourly volumetric space velocity / h -1

[0137] From the results of Example 2, Example 4 and Example 5, it can be seen that with the increase of reaction temperature, the yield of hydrogenated tail oil decreases, while the properties of hydrogenated tail oil become better, and it can be used as high-quality heavy oil catalytic cracking raw material.

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Abstract

The invention relates to the field of oil refining, and discloses an inferior raw oil lightweighting method. The method comprises the following steps: introducing a reaction material in a slurry bed reactor for a hydrocracking reaction to obtain a hydrocracking mixture; separating the hydrocracking mixture to obtain heavy distillate oil containing a hydrogenation catalyst; introducing the heavy distillate oil in a hydrocyclone separator for separating the heavy distillate oil to obtain the low-density distillate oil of a poor solid content component and high-density tail oil of a rich solid content component; then introducing the low-density distillate oil in a fixed bed hydrotreatment apparatus for a hydrogenation reaction, fractionating the hydrogenation reaction products to obtain hydrogenation tail oil; and circulating the high-density tail oil to the inner space of the slurry bed reactor. The method can efficiently convert the inferior raw oil such as deoiled asphalt and / or high aromatic hydrocarbon component such as ethylene tar, catalytic cracking recycle oil and catalytic cracking slurry to the lightweight distillate oil.

Description

technical field [0001] The invention relates to the field of oil refining, in particular to a method for lightening inferior raw material oil. Background technique [0002] In a traditional refinery, the solvent deasphalting process is mainly used to produce high-viscosity lubricating oil base oil from the vacuum residue. color. However, the degree of heavy crude oil processed by modern refineries has increased, resulting in an increase in the residual carbon value and metal content of raw materials for heavy oil catalytic cracking and fixed-bed residual oil hydrogenation devices, which in turn affects the operation cycle of the above-mentioned devices. However, impurities such as metals in the residual oil are mainly concentrated in the asphaltene component, so the solvent deasphalting process can completely remove the asphaltene in the raw oil, so that the residual carbon value and metal content of the deasphalted oil are greatly reduced. Therefore, it can be used as a h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/02C10G47/26C10G49/02C10G49/04
Inventor 王蕴吴治国王卫平申海平王子军汪燮卿
Owner CHINA PETROLEUM & CHEM CORP
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