Heavy oil hydrocracking technology

A heavy oil hydrogenation and process technology, applied in hydrotreating process, petroleum industry, treatment of hydrocarbon oil, etc., can solve the problems of low desulfurization rate and denitrification rate, improve the desulfurization rate and denitrification rate, and is conducive to desulfurization The effect of denitrification and temperature increase

Active Publication Date: 2018-05-29
BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The problem to be solved by the present invention is to overcome the defects of low desulfurization rate and denitrification rate in the suspension bed hydrocracking process in the prior art, so as to provide a stable hydrocracking system that can directly and efficiently utilize heavy and residual oil to produce high-quality oil products. Suspension bed hydrocracking process

Method used

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  • Heavy oil hydrocracking technology
  • Heavy oil hydrocracking technology
  • Heavy oil hydrocracking technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The hydrogenation reaction of the heavy oil hydrocracking process provided in this example is realized through two series-connected suspension beds, and a typical low-quality vacuum residue is selected as the heavy oil raw material. The residual carbon content, sulfur content, and nitrogen content of the vacuum residue are , colloid, asphaltenes and metals are all high, and the properties of this raw material are shown in Table 1.

[0045] Table 1 Evaluation of inferior vacuum residue used

[0046]

[0047] For the device used in this embodiment, see figure 1 , the specific process steps are as follows:

[0048] Using nickel phosphomolybdate aqueous solution as a hydrocracking catalyst, Co-Mo / Al 2 o 3 As a hydrorefining catalyst, it is mixed with heavy oil raw materials, and the amount of the catalyst used is controlled to be 1000 μg / g and 300 μg / g in terms of metal, and then the mixture is mixed with hydrogen to control the hydrogen-to-oil ratio to 1500. Put the...

Embodiment 2

[0053] The heavy oil hydrocracking process provided in this example uses the same inferior vacuum residue as in Example 1 as the heavy oil raw material.

[0054] The specific steps of the heavy oil hydrocracking process provided in this example are as follows:

[0055] Using nickel phosphomolybdate aqueous solution as a hydrocracking catalyst, Co-Mo / Al 2 o 3 As a hydrorefining catalyst, it is mixed with heavy oil raw materials, and the amount of the catalyst used is controlled to be 10 μg / g in terms of metal, and then the mixture is mixed with hydrogen to control the hydrogen-to-oil ratio to 1000. Put the raw material mixture mixed with hydrogen into the bottom of the primary suspension bed 1, control the reaction temperature to 460°C, the reaction pressure to 16MPa, and the space velocity to 1h -1 , to carry out the primary hydrocracking reaction.

[0056] The primary hydrocracking product output from the top of the primary suspension bed 1 is mixed with fresh hydrogen, an...

Embodiment 3

[0060] The heavy oil hydrocracking process provided in this example uses the same inferior vacuum residue as in Example 1 as the heavy oil raw material.

[0061] The specific steps of the heavy oil hydrocracking process provided in this example are as follows:

[0062] Nickel phosphomolybdate aqueous solution as hydrocracking catalyst Co-Mo / Al 2 o 3 As a hydrorefining catalyst, it is mixed with heavy oil raw materials, and the amount of the catalyst used is controlled to be 10 μg / g in terms of metal, and then the mixture is mixed with hydrogen to control the hydrogen-to-oil ratio to 1000. Put the raw material mixture mixed with hydrogen into the bottom of the primary suspension bed 1, control the reaction temperature to 460°C, the reaction pressure to 16MPa, and the space velocity to 1.3h -1 , to carry out the primary hydrocracking reaction.

[0063] The primary hydrocracking product output from the top of the primary suspension bed 1 is mixed with fresh hydrogen, and the h...

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Abstract

The invention belongs to the technical field of petrochemical industry, and relates to a hydrocracking technology. By a heavy oil hydrocracking technology provided by the invention, through addition of a hydrocracking catalyst and a hydrofinishing catalyst simultaneously in a hydrocracking reaction, in cooperation with supplementation of fresh hydrogen, the partial pressures of H2S and NH3 in a secondary hydrocracking reaction are reduced, and a hydrodesulfurization reaction and a hydrodenitrification reaction can be promoted to be reversely performed. The lightweight conversion rate of heavyoil is improved, and the desulfurization rate and the denitrification rate are greatly increased, so that an oil product with relatively high quality is directly and efficiently obtained. In allusionto the characteristics of components contained in the heavy oil, the time of inflating the secondary hydrogen and heating is further controlled, so that the reaction time is saved on the basis that amore easily cracked heavy oil component is hydrocracked as much as possible; through timely heating and supplementation of fresh hydrogen, hydrocracking and refinement of a heavy oil component which is more difficultly cracked for removing heteroatoms is promoted.

Description

technical field [0001] The invention belongs to the technical field of petrochemical industry, and in particular relates to a hydrocracking process. Background technique [0002] In recent years, with the deepening of crude oil's deterioration and heavyness, and the increasing demand for clean gasoline and diesel, the lightening technology for low-quality heavy oil such as residual oil has become a research hotspot. Suspension bed hydrocracking technology is a hydrocracking process in which catalyst and hydrogen are uniformly dispersed in heavy oil and suspended in the reactor. The catalyst used can be an organic salt of a transition metal or an aqueous solution of a heteropolyacid salt . Because of its simple operation, high conversion rate, and strong applicability, it can handle various low-quality and heavy crude oils, and has become one of the most important technologies to realize the lightening of heavy oil. [0003] The asphaltenes contained in residual oil and low...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G65/12
CPCC10G65/12C10G2300/202
Inventor 刘畅丁同利高忠超周晓艳崔永君
Owner BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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