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A method and system for processing heavy feedstock oil

A raw oil and heavy technology, which is applied in the field of processing heavy raw oil and heavy raw oil, can solve the problems of short operation period, low hydrogen content of hydrogenation residue, affecting the technical and economic benefits of the combination, etc. The effect of improving utilization and efficient conversion

Active Publication Date: 2022-06-28
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the high content of asphaltenes and metals in the residual oil is a restrictive factor for the operation cycle of the fixed bed residual oil hydrogenation unit
In order to solve this problem, the residual oil solvent deasphalting (demetallization)-hydrotreating-catalytic cracking combined process technology (SHF) developed by the Research Institute of Petroleum and Chemical Industry is to maximize the production of automotive cleaning oil from low-value vacuum residue. The innovative technology of fuel and prolonging the operation cycle, but because of the difficult treatment of deoiled asphaltenes (DOA), the road is blocked, which limits the promotion of SHF technology
[0005] The new combined process of residuum hydrogenation-catalytic cracking (DCC) producing more propylene in the transition to chemical industry is also limited by the influence of asphaltenes and metals in the residuum, the hydrogen content of the hydrogenated residuum is low, and the The operation cycle is short and the DCC propylene yield is low, which affects the economic benefits of the combined technology

Method used

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  • A method and system for processing heavy feedstock oil
  • A method and system for processing heavy feedstock oil
  • A method and system for processing heavy feedstock oil

Examples

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specific Embodiment approach

[0053] Preferably, the amount ratio of the deoiled asphalt and the aromatics-containing stream is such that the mixed feedstock formed from the deoiled asphalt and the aromatics-containing stream is in a liquid state at a temperature not higher than 280°C; further preferably, the deoiled asphalt and the aromatics-containing stream are in a liquid state. The amount ratio of the aromatics-containing stream is such that the mixed feed formed from the deoiled asphalt and the aromatics-containing stream is liquid at a temperature not higher than 100°C.

[0054] When the oil slurry obtained in the DCC unit and the deoiled asphalt obtained in the solvent deasphalting unit are introduced into the second hydrogenation unit for conversion reaction, the oil slurry may or may not be filtered, preferably After filtering, the solid content is controlled to be less than or equal to 10ppm.

[0055] Preferably, the aromatics-containing stream further contains an aromatics-rich distillate oil, ...

Embodiment A

[0128] The solvent deasphalting is carried out with the Middle East vacuum residue as the raw material. The solvent used is a hydrocarbon mixture mainly containing butane (butane content is 75% by mass) and containing a small amount of propane and pentane. At 120 ° C, the solvent: Solvent deasphalting was carried out under the condition of vacuum residue=4:1 (mass ratio), the mass yield of deasphalted oil (DAO) was 72.4%, and the mass yield of deoiled asphalt (DOA) was 27.2%.

Embodiment 1

[0130] The DAO and DOA used in this example are all obtained from Example A, and the properties of DAO and DOA are shown in Table 1.

[0131] The properties of the liquid-phase product of DAO after passing through the first hydrogenation unit are shown in Table 1.

[0132] The operating conditions of the DCC unit are: the reaction temperature is 410° C., the agent-oil ratio is 3, and the residence time is 5s; the DCC unit obtains LCO1 (see Table 6 for properties), HCO1 and oil slurry 1.

[0133] The oil slurry 1 obtained from the DCC unit is passed through the fourth hydrogenation unit (fixed bed residue hydrogenation unit) to obtain the demetallized oil slurry 1. The properties are shown in Table 1.

[0134] DOA and demetallized oil slurry 1 are mixed at a mass ratio of 1:10. After the mixed raw materials (see Table 2 for properties) are hydrotreated by the second hydrogenation unit (fixed bed residue hydrotreating unit), the product properties are shown in Table 3. .

[01...

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Abstract

The invention relates to the field of hydrocarbon oil processing, and discloses a method and system for processing heavy feedstock oil, comprising: (1) introducing heavy feedstock oil into a solvent deasphalting unit to obtain deoiled asphalt and deasphalted oil; (2) ) introducing the deasphalted oil into the first hydrogenation unit, and introducing the obtained liquid phase effluent into the DCC unit for reaction; (21) introducing the oil slurry obtained in the DCC unit into the fourth hydrogenation unit, Obtain oil slurry after demetallization; (3) introduce aromatics-containing stream and deoiled pitch into the second hydrogenation unit for conversion reaction; (4) separate the liquid phase effluent in the second hydrogenation unit, and The separated light component is introduced into the third reaction unit for reaction; and the separated heavy component is introduced into the delayed coking unit for reaction, or the separated heavy component is used as a low-sulfur marine fuel oil component. The foregoing treatment process provided by the present invention can realize high-value utilization of DOA.

Description

technical field [0001] The invention relates to the field of hydrocarbon oil processing, in particular to a method for processing heavy feedstock oil and a system for processing heavy feedstock oil. Background technique [0002] At present, the world is facing the trend of crude oil becoming heavier and worse, while people's demand for heavy fuel oil is gradually decreasing, while the demand for light oil is increasing substantially. Therefore, refiners have pursued the maximum conversion of residual oil. [0003] The fixed bed residual oil hydrogenation unit has the characteristics of good product quality and mature technology, and its industrial production capacity occupies a high share in the field of residual oil hydrogenation. [0004] However, the high content of asphaltenes and metals in the residue is a limiting factor for the operating cycle of a fixed bed residue hydrotreating unit. To solve this problem, the combined process technology of residual solvent deasph...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G69/00C07C4/06C07C11/06
CPCC10G69/00C07C4/06C10G2400/02C10G2400/04C10G2400/30C10G2400/20C10G2300/107C10G2300/70C10G2300/202C10G2300/1077C07C11/06
Inventor 胡大为杨清河孙淑玲牛传峰贾燕子戴立顺王振任亮户安鹏
Owner CHINA PETROLEUM & CHEM CORP
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