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Low-quality heavy oil and residual oil hydrotreatment combined process capable of prolonging service life of catalyst

A technology for hydrogenation of residual oil and low-quality heavy oil, applied in the field of hydrogenation, can solve the problems of difficulty in obtaining products and benefits, high density of residual oil, and many impurities, and achieve the effects of improving operating performance, reducing pressure drop, and low investment.

Active Publication Date: 2014-01-29
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Residual oil has high density, high viscosity, and many impurities. It is difficult to obtain ideal products and benefits only by a single processing method.

Method used

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  • Low-quality heavy oil and residual oil hydrotreatment combined process capable of prolonging service life of catalyst
  • Low-quality heavy oil and residual oil hydrotreatment combined process capable of prolonging service life of catalyst
  • Low-quality heavy oil and residual oil hydrotreatment combined process capable of prolonging service life of catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Use raw material A as raw material (see Table 1 for properties), and process it for 2000 hours under the combined process flow. Slurry bed hydrogenation pretreatment process conditions are as follows: hydrogen pressure 18.0MPa; temperature 430°C; liquid hourly volume space velocity 0.6h -1 The volume ratio of hydrogen to oil is 1000; the slurry bed catalyst is a composite catalyst of carbonaceous particles and molybdenum oxide, the addition amount is 5%, and the slurry bed hydrogenation catalyst is prepared according to the method in Example 2 of CN102049252A. The process conditions of fixed bed hydrotreating are as follows: hydrogen pressure 18.0MPa; temperature 390℃; liquid hourly volume space velocity 0.3h -1 ; The volume ratio of hydrogen to oil is 1000. The catalysts loaded in each reactor are hydrodeferrification and decalcification catalysts, hydrodemetallization catalysts, hydrodesulfurization catalysts and hydrodenitrogenation catalysts in sequence. The hydro...

Embodiment 2

[0064] Using raw material B as raw material (see Table 1 for properties), it was treated by combined process for 2000h. Slurry bed hydrogenation pretreatment process conditions are as follows: hydrogen pressure 12.0MPa; temperature 390°C; liquid hourly volume space velocity 0.2h -1 The volume ratio of hydrogen to oil is 800; the slurry bed hydrogenation catalyst is the same as in Example 1, which is a composite catalyst of carbonaceous particles and nickel oxide, and the addition is 0.5%. The process conditions of fixed bed hydrotreating are as follows: hydrogen pressure 12.0MPa; temperature 385°C; liquid hourly volume space velocity 0.25h -1 ; The volume ratio of hydrogen to oil is 800. The catalysts loaded in each reactor are hydrodeferrification and decalcification catalysts, hydrodemetallization catalysts, hydrodesulfurization catalysts and hydrodenitrogenation catalysts in sequence. Catalyst and addition ratio are with embodiment 1.

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Abstract

The invention relates to a low-quality heavy oil and residual oil hydrotreatment combined process. The low-quality heavy oil and residual oil hydrotreatment combined process is characterized in that firstly a heavy oil raw material is subjected to hydrogenation pretreatment by a slurry bed, after the gas-liquid separation is carried out, a liquid product is subjected to hydro-upgrading through a stationary bed, wherein a hydrogenation pretreatment part of the slurry bed comprises a slurry bed hydrogenation reactor and a slurry bed hydrogenation catalyst, reactors used for a hydro-upgrading part of the slurry bed mainly comprise two up-flow deferrization and decalcification reactors connected in parallel, one up-flow demetalization reactor, one fixed bed desulfurization reactor and one stationary bed denitrification reactor sequentially. The low-quality heavy oil and residual oil hydrotreatment combined process has the advantages of being capable of improving the hydrogenation impurity removal capacity of the catalyst, prolonging the life cycle of the catalyst, treating residual oil with high metal content, high sulfur, high nitrogen and high asphaltene and effectively slowing down the ascending velocity of pressure drop of the reactors, so that the long-period operation of the device is realized.

Description

technical field [0001] The method of the present invention can be used in the field of hydrogenation, especially for high metal (Ni+V≥200μg·g -1 ), high carbon residue (CCR ≥ 20wt%), heavy distillate oil with high asphaltene content, residual oil and oil sand bitumen hydrofining and hydrotreating. The method of the invention provides an effective way for prolonging the service life of the catalyst and improving the long-period operation performance of the device on the basis of ensuring high demetallization, desulfurization, denitrification and deasphaltene activities. Background technique [0002] At present, with the worsening and heavier trend of crude oil, the increasing demand for light oil products and the increasingly stringent environmental protection regulations, the processing and upgrading technology of residual oil has attracted widespread attention from all over the world. The deep processing and upgrading of low-quality residual oil has important practical sig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G65/04
Inventor 刘元东赵愉生赵元生范建光陈芬芬周志远张志国崔瑞利张春光于双林谭青峰程涛那美琦胡长禄
Owner PETROCHINA CO LTD
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