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A surface amphiphilic nano tungsten disulfide hydrogenation catalyst and its preparation method and application

A hydrogenation catalyst, tungsten disulfide technology, applied in physical/chemical process catalysts, nanotechnology for materials and surface science, chemical instruments and methods, etc., can solve the problem of complex composition and unsatisfactory dispersion of heavy oil and other problems, to achieve the effect of good application prospects

Active Publication Date: 2018-09-21
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the tungsten sulfide catalysts prepared by these research methods are either water-soluble or oil-soluble
Due to the complex composition of heavy oil, which contains both polar and non-polar substances, the dispersion of tungsten disulfide with a single surface affinity is not ideal

Method used

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  • A surface amphiphilic nano tungsten disulfide hydrogenation catalyst and its preparation method and application
  • A surface amphiphilic nano tungsten disulfide hydrogenation catalyst and its preparation method and application
  • A surface amphiphilic nano tungsten disulfide hydrogenation catalyst and its preparation method and application

Examples

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Effect test

Embodiment 1

[0027] This example illustrates the method of using 1-butyl-3-methylimidazolium tetrafluoroborate to prepare surface amphiphilic nano tungsten disulfide hydrogenation catalyst.

[0028] Add a certain amount of sodium dithiotungstate [Na 2 WO 2 S 2 ], make the concentration of tungsten reach 0.012mol / L, stir until uniform; add hydroxylamine hydrochloride to the above mixture, make hydroxylamine hydrochloride: sodium dithiotungstate (molar ratio) reach 4:1, stir until uniform; Add ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate to make 1-butyl-3-methylimidazolium tetrafluoroborate: sodium dithiotungstate (molar ratio) reach 22: 1. Stir until uniform, and prepare the initial reaction mixture; transfer the initial reaction mixture to a high-pressure synthesis kettle, and crystallize at 200°C for 5 hours. After the crystallization is completed, the reactant is cooled to room temperature, filtered, washed with deionized water and dried to obtain a surface amphiphilic n...

Embodiment 2

[0030] This example illustrates the method of using 1-propyl-3-methylimidazolium hexafluorophosphate to prepare surface amphiphilic nano tungsten disulfide hydrogenation catalyst.

[0031] Add a certain amount of potassium dithiotungstate [K 2 WO 2 S 2 ], make the concentration of tungsten reach 0.016mol / L, stir until uniform; add potassium borohydride in the above-mentioned mixture, make potassium borohydride: potassium dithiotungstate (molar ratio) reach 4:1, stir until uniform; Add ionic liquid 1-propyl-3-methylimidazolium hexafluorophosphate to the above mixture, so that 1-propyl-3-methylimidazolium hexafluorophosphate: potassium dithiotungstate (molar ratio) reaches 17: 1. Stir until uniform, and prepare the initial reaction mixture; transfer the initial reaction mixture to a high-pressure synthesis kettle, and crystallize at 180°C for 14 hours. After the crystallization is completed, the reactant is cooled to room temperature, filtered, washed with deionized water and...

Embodiment 3

[0033] This example illustrates the method of using 1-ethyl-3-methylimidazolium bromide to prepare surface amphiphilic nano-tungsten disulfide hydrogenation catalyst.

[0034] Add a certain amount of ammonium dithiotungstate [(NH 4 ) 2 WO 2 S 2 ], make the concentration of tungsten reach 0.4mol / L, stir until uniform; add polyethyleneimine to the above mixture, make polyethyleneimine: tungsten nitrate (molar ratio) reach 2.2:1, stir until uniform; Add ionic liquid 1-ethyl-3-methylimidazolium bromide to make 1-ethyl-3-methylimidazolium bromide: dithioammonium tungstate (molar ratio) reach 0.04:1, stir until uniform, Configured as an initial reaction mixture; the initial reaction mixture was transferred to a high-pressure synthesis kettle, and crystallized at 160°C for 36h. After the crystallization is completed, the reactant is cooled to room temperature, filtered, washed with deionized water and dried to obtain a surface amphiphilic nano tungsten disulfide hydrogenation cat...

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Abstract

A surface amphiphilic nanometer tungsten disulfide hydrogenation catalyst and its preparation method and application. Thiotungstate, reducing agent, ionic liquid and deionized water are formulated into an initial reaction mixture according to a certain order and method, and then in a sealed Crystallize under hydrothermal conditions in a high-pressure reactor, and the crystallized product is filtered, washed, and dried to obtain a surface amphiphilic nano-tungsten disulfide hydrogenation catalyst. The invention uses ionic liquid in the synthesis system, and the prepared nano tungsten disulfide has good surface amphiphilicity, and has excellent dispersibility and catalytic activity in both polar and non-polar catalytic reaction systems. The nano tungsten disulfide provided by the present invention is used in the suspension bed hydrogenation deasphalting, hydrodesulfurization, hydrodenitrogenation, aromatics hydrogenation and other reactions of heavy oil such as coal tar, heavy oil, super heavy oil, residual oil, shale oil, etc. It exhibits excellent catalytic activity and has good application prospects in photoelectric conversion, photocatalytic water hydrogen production and other reactions.

Description

technical field [0001] The invention relates to a surface amphiphilic nanometer tungsten sulfide catalyst and its preparation method and application, belonging to the field of synthesis and catalytic application of nanomaterials. Background technique [0002] Suspension bed hydrogenation process is an advanced technology for hydrogenation of heavy unconventional oil (residual oil, heavy oil / ultra heavy oil, shale oil, coal tar heavy component, sandstone oil, oil sand bitumen, etc.) to prepare liquid fuel oil. Suspension-bed hydrogenation process requires catalysts with high activity, high dispersion, high stability, and good economy. It is a challenging task to prepare catalysts suitable for suspension-bed hydrogenation process. [0003] Tungsten disulfide is a layered material with a graphene-like structure, which has shown good applications in the fields of catalysis, microelectronics, and semiconductors. Supported tungsten disulfide catalysts have been used as hydrogenat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/047B82Y30/00B82Y40/00C10G45/04
Inventor 马怀军田志坚曲炜王从新王炳春徐仁顺李鹏潘振栋王冬娥
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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