Combined process for hydrotreatment of heavy oil

A technology of hydrotreating and combined process, applied in hydrotreating process, petroleum industry, processing hydrocarbon oil, etc., can solve the problem of high investment, achieve the effect of prolonging operation time, maintaining long-term stable operation, and reducing equipment investment

Active Publication Date: 2013-05-15
CHINA PETROLEUM & CHEM CORP +1
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AI Technical Summary

Problems solved by technology

[0011] The above-mentioned ebullated bed hydrogenation reactors all use the online catalyst addition and discharge system. Due to the high investment of the ebullated bed online addition and discharge system, according to calculations, the investment in the catalyst online addition and discharge system accounts for about half of the total investment of the ebullated bed hydrogenation system, and the operation When the failure occurs mainly in the discharge system

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  • Combined process for hydrotreatment of heavy oil

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preparation example Construction

[0040] The preparation process of the ebullated bed hydrotreating catalyst is to firstly prepare the microspherical catalyst carrier, and then use the impregnation method to support the required hydrogenation active metal components. The preparation process of the catalyst carrier is as follows: the raw materials of the catalyst carrier with suitable humidity are made into particles of suitable size, and then the particles are spheroidized, and the spheres are dried and calcined to form a spherical catalyst carrier.

[0041] The drying and calcination of the catalyst carrier can adopt conditions well known to those skilled in the art, such as natural drying or drying at 80-150°C, and calcination at 600-1000°C for 1-6 hours. The impregnation method to support the active hydrogenation metal component can be carried out by methods well known to those skilled in the art, such as making a solution of the required active metal salt, impregnating the catalyst carrier with the solution...

Embodiment 1

[0045] Catalyst preparation

[0046] A spherical catalyst carrier is prepared, the average pore diameter is 24nm, and the spherical particle diameter is 0.1-0.3mm. Prepare the Mo-Ni solution according to the conventional method, and use MoO in the solution 3 The content by weight is 8.00%, and the content by weight of NiO is 1.80%. The above-mentioned support was impregnated with the solution in an equal-volume impregnation method to obtain the final catalyst R101-C, the properties of which are shown in Table 1.

[0047] A spherical catalyst carrier with an average pore diameter of 15 nm is prepared, and the spherical catalyst particle size is 0.1-0.3 mm. Prepare the Mo-Ni-P solution according to the conventional method, and use MoO in the solution 3 The content by weight is 13.00%, the content by weight of NiO is 2.50%, and the content by weight of P is 1.00%. The above-mentioned support was impregnated with this solution by an equal-volume impregnation method to obtain t...

Embodiment 2

[0054] The ebullating bed hydrogenation reactor described in the present invention is a three-phase ebullating bed reactor, and the ebullating bed reactors disclosed in CN02109404.7, CN200610134154.5 and CN200710012680.9 can be used, which can satisfy gas, liquid, solid The three phases are separated in the ebullated bed reactor.

[0055] Select R101-C, R102-C and R103-C catalysts in Example 1 to join respectively in three series-connected 1L three-phase ebullating bed reactors, FZC-40 catalysts are packed into a fixed bed reactor R-1, In the presence of hydrogen, a vacuum residue hydrotreating test was carried out. The properties of the vacuum residue selected for the test are: distillation range 520°C +, the sulfur content is 2.60% by mass, the metal (Ni+V+Fe) content is 253 μg / g, the CCR (carbon residue) content is 12.1% by mass, and the asphaltene content is 5.9% by mass.

[0056] The test conditions and evaluation results are shown in Table 2.

[0057] Table 2 Process ...

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Abstract

The invention relates to a combined process for hydrotreatment of heavy oil. According to the invention, fluidized bed reactors and a fixed bed reactor are combined together; raw oil and hydrogen enter from the bottom of the fluidized bed reactors and undergo a hydrogenation reaction under hydrogenation conditions of a fluidized bed; reacted materials are discharged from the top of the fluidized bed reactor, enter into the fixed bed reactor and undergo a hydrogenation reaction under hydrogenation conditions of a fixed bed, and a liquid material obtained in the fixed bed reactor is used as raw oil for a catalytic cracking unit; at least two tandem fluidized bed reactors are arranged, and a first fluidized bed reactor and a second fluidized bed reactor are switchable. For the fluidized bed reactors provided by the invention, arrangement of an on-line catalyst feeding and discharging system is not needed, so investment for equipment can be obviously reduced; the fluidized bed reactors can cooperate with the fixed bed reactor, so a running period of the equipment can be effectively prolonged, and a high-quality raw material is provided for the catalytic cracking unit.

Description

technical field [0001] The invention relates to a combined process method for heavy oil hydrotreating. The process is an organic combination of ebullating bed and fixed bed process to produce catalytic cracking raw material. Background technique [0002] Petroleum is one of the important energy sources widely used by human beings today. However, since the buried amount of petroleum on the earth is fixed, and low-quality heavy oil accounts for a large proportion of crude oil reserves, it is necessary to effectively use limited petroleum resources, especially to make full use of them. Low-quality heavy oil resources are a daunting task for oil refinery scientists and technicians. Residual oil is the residue left after petroleum distillation processing, and its ratio accounts for about 50% of the oil before processing. Due to the poor quality of residual oil, high content of impurities and non-ideal components, the processing is difficult, so that residual oil was once used as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G65/04
Inventor 孙素华方向晨朱慧红王刚刘杰杨光
Owner CHINA PETROLEUM & CHEM CORP
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