Hydrogenation adsorption desulphurization and catalytic hydro-dearomatization cascade reaction process

A technology of hydrodearomatization and adsorption desulfurization, which is applied in the fields of hydrotreating process, petroleum industry, and processing hydrocarbon oil, etc., to achieve the effects of avoiding energy, reducing operating costs, and reducing equipment

Active Publication Date: 2009-07-08
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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AI Technical Summary

Problems solved by technology

In short, the sulfur content in the raw material is the main poison of Ni, Pt, Pd or Pt-Pd hydrogenation catalysts for the removal of aromatics. If there is a certain amount of sulfide in the raw material, it is impossible for the above catalysts to maintain the activity of aromatics hydrogenation stably for a long time.

Method used

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  • Hydrogenation adsorption desulphurization and catalytic hydro-dearomatization cascade reaction process
  • Hydrogenation adsorption desulphurization and catalytic hydro-dearomatization cascade reaction process
  • Hydrogenation adsorption desulphurization and catalytic hydro-dearomatization cascade reaction process

Examples

Experimental program
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Effect test

Embodiment 1

[0023] The raw material is obtained from the by-product raffinate (mainly C 6 、C 7 Hydrocarbons), olefin content 6.42%, total aromatics content 2.12% (benzene 0.20%, toluene 0.81, xylene 1.11%), organic sulfur content 5.0ppm (equivalent to 20ppm sulfolane). The first reactor is filled with Ni / ZnO hydrogenation adsorption catalyst, at 270°C, 1.3MPa, 1.5h -1 Hydrogenation adsorption desulfurization is carried out under the reaction conditions of the volume ratio of hydrogen to oil of 200. The second reactor is filled with Ni / Al 2 o 3 , the reaction conditions are 130℃, 1.3MPa, 2h -1 , The volume ratio of hydrogen to oil is 200. The results of sulfides and olefins after hydrogenation are shown in Table 1, and the results of aromatics are shown in Table 2.

Embodiment 2

[0025] The raw material and filling method are the same as in Example 1, and the reaction conditions of the hydrogenation adsorption catalyst are at 330°C, 2.5MPa, and 3.5h -1 , The volume ratio of hydrogen to oil is 600 for hydrogenation adsorption desulfurization. The second reactor is filled with Pt / Al 2 o 3 , the reaction conditions are 220℃, 2.5MPa, 3.0h -1 , The volume ratio of hydrogen to oil is 600. The results of sulfides and olefins after hydrogenation are shown in Table 1, and the results of aromatics are shown in Table 2.

Embodiment 3

[0027] The raw material and filling method are the same as in Example 1, and the reaction conditions of the hydrogenation adsorption catalyst are at 300°C, 2.0MPa, and 2.5h -1 , The volume ratio of hydrogen to oil is 400 for hydrogenation adsorption desulfurization. Hydrodearomatics catalyst changed to Pd / Al 2 o 3 , the reaction conditions are 240℃, 2.0MPa, 2.5h -1 , The volume ratio of hydrogen to oil is 400. The results of sulfides and olefins after hydrogenation are shown in Table 1, and the results of aromatics are shown in Table 2.

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Abstract

The invention discloses a cascade reaction process for hydrogenation adsorption desulfurization and hydro-dearomatization. A hydrogenation adsorption catalyst and a hydro-dearomatization catalyst are directly and serially filled, and a raw material is removed with sulfide through the hydrogenation adsorption catalyst under the condition of hydrogenation adsorption, and then is removed with aromatic hydrocarbon through the hydro-dearomatization catalyst under the condition of hydro-dearomatization. The process has the advantages that no hydrogen sulfide is generated in a first reactor, and thecontent of the sulfide in a product is lower, thereby prolonging the using period of a second hydro-dearomatization catalyst, reducing operation cost, reducing equipment, and saving the investment.

Description

technical field [0001] The invention belongs to a series reaction process of hydrogenation adsorption desulfurization and hydrogenation dearomatization. Background technique [0002] As the country uses 6 for edible oil extraction # Improvement of solvent oil quality requirements, 6 # The aromatics content index in solvent oil has been reduced from 1% to 0.1%, and now it is industrially produced 6 # It is difficult for solvent oil technology to reach this target. Production 6 # The raw material of solvent oil is generally aromatic hydrocarbon raffinate oil, straight-run gasoline or oil field condensate oil. Now the solvent used in industrial extraction of aromatic hydrocarbon is sulfolane. Aromatic hydrocarbon raffinate oil inevitably contains a certain amount of organic sulfide. Organic sulfur compounds are also present in straight-run gasoline and oil field condensate. Since the hydrogenated hydrogen generally also contains 0.5ppm of inorganic sulfur, these sulfides a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G65/00
Inventor 李学宽吕占军杜明仙唐明兴周立公
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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