Hydrotreating method for heavy hydrocarbon raw materials

A technology for hydrotreating and raw materials, applied in hydrotreating process, treating hydrocarbon oil, petroleum industry, etc., can solve problems such as reducing liquid recovery and light oil loss, achieve optimized operation, prolong service life, slow down coking and block bed layer effect

Active Publication Date: 2012-05-23
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

The disadvantage of this process is that on the one hand, when the heavy components are extracted due to the high pressure, they will inevitably carry a large amount of light components and cause the loss of light oil; on the other hand, the repeated cracking reactions of light oil in the reactor reduce the liquid recovery

Method used

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  • Hydrotreating method for heavy hydrocarbon raw materials
  • Hydrotreating method for heavy hydrocarbon raw materials

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Embodiment 1

[0040] The fixed-bed residual oil hydrogenation reactor has three beds in total, and the catalyst types and dosages of the three beds are the same. After heating, the residual oil and hydrogen enter the first bed of the fixed-bed reactor for hydrogenation reaction. The reaction conditions are as follows : Temperature---360℃; pressure 15.0MPa, residual oil feed volume space velocity 0.5h -1 ; The hydrogen-oil ratio at the reactor inlet is 1300 (V / V). The solvent is propane, the cold oil is petroleum distillate at 320-420°C, and the solvent and cold oil are introduced into the outlets of the first bed and the second bed. The quoted amount of solvent in each bed is 15% of the mass of raw material feed. The inlet temperature of each catalyst bed is controlled at 360°C.

[0041] From the test results, the light oil recovered by this method has low impurity content and can be used as feedstock for gasoline and diesel hydrogenation units, which improves the utilization rate and pro...

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Abstract

The invention discloses a hydrotreating method for heavy hydrocarbon raw materials. According to the invention, a fixed bed hydrogenation reactor is employed; at least two catalyst beds are arranged in the fixed bed hydrogenation reactor; a solvent is introduced at least from one gap formed by two adjacent catalyst beds and is mixed with reacting materials, and light components are extracted; the light components are introduced out from the reactor in an extraction and separation area between two adjacent catalyst beds, and heavy components enter into next catalyst bed for further reaction; extracted oil can directly enter into a gasoline/diesel hydrogenation device so as to obtain qualified gasoline/diesel and can also enter into an FCC main fractionating column for fractionation so as to obtain a crude product which enters into the gasoline/diesel hydrogenation device so as to obtain qualified gasoline/diesel. The method provided in the invention can effectively reduce pressure drop of beds in fixed bed hydrotreatment, prolong the service life of a catalyst, improve a total conversion rate of a fixed bed hydrogenation apparatus and enhance treating capacity of an apparatus under the condition of a same conversion rate, thereby creating greater benefits for an enterprise.

Description

technical field [0001] The invention relates to a hydrogenation treatment method for heavy hydrocarbon raw materials, in particular to a hydrogenation treatment method for simultaneous de-impurity removal of heavy hydrocarbon raw materials and separation of light and heavy oils. Background technique [0002] With the deterioration and weight of crude oil and the increasing demand for light oil products, the lightening of heavy oil has become the main task of refiners. Heavy oil hydrotreating is one of the main methods for lightening heavy oil. It can not only remove a large amount of harmful impurities such as metals, sulfur, and nitrogen in residual oil, but also crack heavy and residual oil into high-value low-boiling components. . [0003] At present, there are four types of residual oil hydrogenation processes that have been industrialized or technologically mature in the world: fixed bed, moving bed, ebullated bed and suspended bed, among which the fixed bed process is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/04
Inventor 杨秀娜
Owner CHINA PETROLEUM & CHEM CORP
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