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A kind of fixed bed heavy oil hydrogenation method

A heavy oil hydrogenation and fixed bed technology, which is applied in the fields of hydrogenation treatment process, petroleum industry, hydrocarbon oil treatment, etc., can solve the problems of low activity and inability to effectively improve the hydrogenation performance of the graded catalyst system, and achieve high impurity capacity , Improve operational flexibility and ensure product quality

Active Publication Date: 2014-10-22
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The protective agent used in this technology is a conventional fixed-bed protective agent, which has low activity and cannot effectively improve the hydrogenation performance of the entire graded catalyst system

Method used

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  • A kind of fixed bed heavy oil hydrogenation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0027] The serial number 1 is the raw material tank, 2 is the pretreatment reactor, 3 is the hydrodemetallization reactor, 4 is the hydrodesulfurization reactor, 5 is the hydrodenitrogenation reactor, 6 is the distillation unit, 7 is gasoline, and 8 is diesel oil , 9 is hydrogenation tail oil, 10 is hydrogen, and the rest are pipelines.

[0028] Such as figure 1 As shown, the principle process of heavy oil hydrotreating in the present invention is as follows: first, the heavy oil raw material in the raw material tank 1 is mixed with hydrogen 10 and enters the pretreatment reactor 2 in a flow-type manner to carry out hydrodescaling, hydrodemetallization and partial asphaltene addition. Hydrogen conversion reaction; the pretreated stream enters the hydrodemetallization reactor 3, hydrodesulfurization reactor 4 and hydrodenitrogenation reactor 5 in sequence for hydrodemetallization, hydrodesulfurization and hydrodenitrogenation / hydroconversion Reaction; after the reaction, the s...

Embodiment 1

[0037] This example is a hydrogenation test of low-quality residual oil in a fixed-bed heavy oil processing technology. The ebullated-bed reactor for pre-hydrogenation adopts an upflow operation mode, and the rest of the reactors adopt a fixed-bed operation mode in which gas and liquid flow together and flow down. First, the heavy oil raw material in the raw material tank 1 is mixed with hydrogen 10 and enters the pretreatment reactor 2 in an upflow mode for hydrodescaling, hydrodemetallization and partial asphaltene hydroconversion reactions; the pretreatment stream enters the hydrodemetallization in sequence Reactor 3, Hydrodesulfurization Reactor 4 and Hydrodenitrogenation Reactor 5 carry out hydrodemetallization, hydrodesulfurization and hydrodenitrogenation / hydroconversion reactions; after the reaction, the stream passes through distillation unit 6 to obtain 350°C 9. The particulate catalyst used in the pretreatment section is a microspherical molybdenum-nickel catalyst su...

Embodiment 2

[0040] The experimental operation process of this embodiment is basically the same as that of Example 1, except that the particulate catalyst loaded in the inert cage of the reaction section from the stream inlet to one-third of the inlet in the pretreatment reactor contains MoO 3 6wt%, containing 1.2wt% NiO, and a bulk density of 0.65g / cm 3 , with a surface area of ​​190m 2 / g, the average diameter of the catalyst particles is 1.5mm, which accounts for 40% of the cage volume; the equivalent diameter ratio of the metal cage to the catalyst is 60; the catalyst loaded in the remaining reaction section contains MoO 3 It is 12wt%, containing NiO is 4wt%. Catalyst bulk density is 0.71g / cm 3 , with a surface area of ​​230m 2 / g, the average diameter of the catalyst particles is 0.8mm, which accounts for 70% of the cage volume, and the equivalent diameter ratio of the metal cage to the catalyst is 100. The reaction conditions and test results are shown in Table 1.

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Abstract

The invention discloses a fixed bed heavy oil hydrogenation method. The method comprises: mixing a heavy oil raw material with hydrogen, then passing them through a pretreatment section in an up-flow mode to undergo a pre-hydrogenation reaction under hydrotreating conditions, and then passing the product through a hydrodemetallization reaction section, a hydrodesulfurization reaction section and a hydro-denitrification reaction section in order. Specifically, two solid matters of different specifications are filled in the pretreatment reaction section, and include metal cages for keeping a fixed bed and a particulate catalyst positioned in the space formed by the metal cages. The method provided in the invention uses the technological characteristics of fixed bed hydrogenation and ebullated bed hydrogenation for reference at the same time. The filling mode adopted in the pretreatment reaction section provides greater porosity than the prior art, enhances the dirt-holding capacity and hydrogenation performance of the catalyst bed, and delays the appearance of up-flow reactor hot spots, thus ensuring stable running of the device.

Description

technical field [0001] The invention relates to a fixed-bed heavy oil hydrogenation method, in particular to a heavy oil upgrading process using heavy oil as a raw material and adopting a multi-stage hydrogenation process with a pretreatment reaction section and catalyst gradation loading. Background technique [0002] With the rapid development of the global economy, the demand for light and clean fuel oil is increasing rapidly, and the quality of crude oil is getting worse and worse, and the content of heavy components is getting higher and higher. How to effectively use non-renewable petroleum resources to achieve maximum lightness of residue Quality, production of high-value petroleum products is an important issue we are currently facing. [0003] In order to realize the deep processing of heavy oil, the high-viscosity low-quality raw materials are processed into high value-added products, which makes the heavy oil hydrogenation technology develop rapidly. At present, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/02
Inventor 贾丽葛海龙
Owner CHINA PETROLEUM & CHEM CORP
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