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A surface amphiphilic nano-tungsten-molybdenum sulfide hydrogenation catalyst and its preparation method and application

A hydrogenation catalyst, tungsten and molybdenum sulfide technology, used in physical/chemical process catalysts, nanotechnology for materials and surface science, chemical instruments and methods, etc. Complex composition, etc., to achieve good application prospects, good surface amphiphilicity, and high catalytic activity.

Active Publication Date: 2018-03-20
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 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 sulfide with a single surface affinity is not ideal

Method used

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  • A surface amphiphilic nano-tungsten-molybdenum sulfide hydrogenation catalyst and its preparation method and application
  • A surface amphiphilic nano-tungsten-molybdenum sulfide hydrogenation catalyst and its preparation method and application
  • A surface amphiphilic nano-tungsten-molybdenum sulfide hydrogenation catalyst and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] This example illustrates the method of using 1-butyl-3-methylimidazolium tetrafluoroborate to prepare surface amphiphilic nano-tungsten-molybdenum sulfide hydrogenation catalyst.

[0034] Add a certain amount of sodium tungstate to 500mL deionized water to make the concentration of tungsten reach 0.01mol / L, and stir until uniform; add a certain amount of molybdenum acid to make the concentration of molybdenum reach 0.1mol / L Add sodium sulfide to the above mixture aqueous solution, so that Na 2 S: (W+Mo) (molar ratio) reaches 2.5:1, stir until uniform, and react at 75°C for 15 hours; add hydroxylamine hydrochloride to the above mixture to make hydroxylamine hydrochloride: (W+Mo) (molar ratio) reach 4: 1. Stir until uniform; add ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate to the above mixture to make 1-butyl-3-methylimidazolium tetrafluoroborate: (W+Mo ) (molar ratio) reached 24:1, stirred until uniform, and configured as an initial reaction mixture; the i...

Embodiment 2

[0036] This example illustrates the method of using 1-propyl-3-methylimidazolium hexafluorophosphate to prepare surface amphiphilic nanometer tungsten-molybdenum sulfide hydrogenation catalyst.

[0037] Add a certain amount of potassium tungstate to 500mL deionized water to make the concentration of tungsten reach 0.015mol / L, and stir until uniform; add a certain amount of ammonium molybdate to make the concentration of molybdenum reach 0.001mol / L; stir until uniform to the above Aqueous potassium sulfide solution was added to the mixture to make K 2 S: (W+Mo) (molar ratio) reaches 5:1, stir until uniform, and react at 60°C for 18 hours; add potassium borohydride to the above mixture to make potassium borohydride: (W+Mo) (molar ratio) reach 2.8:1, stir until uniform; add ionic liquid 1-propyl-3-methylimidazolium hexafluorophosphate to the above mixture to make 1-propyl-3-methylimidazolium hexafluorophosphate: (W+Mo ) (molar ratio) reached 16:1, stirred until uniform, and conf...

Embodiment 3

[0039] This example illustrates the method of using 1-pentyl-3-methylimidazolium bromide to prepare surface amphiphilic nano-tungsten-molybdenum sulfide hydrogenation catalyst.

[0040] Add a certain amount of tungsten nitrate to 500mL deionized water to make the concentration of tungsten reach 0.5mol / L, and stir until uniform; add a certain amount of sodium molybdate to make the concentration of molybdenum reach 1.5mol / L, and stir until uniform; Add hydrogen sulfide aqueous solution to the mixture to make hydrogen sulfide: (W+Mo) (molar ratio) reach 2.2:1, stir until uniform, and react at 55°C for 17h; add polyethyleneimine to the above mixture to make polyethyleneimine : (W+Mo) (molar ratio) reaches 1.9:1, stir until uniform; add ionic liquid 1-pentyl-3-methylimidazolium bromide to the above mixture, make 1-pentyl-3-methylimidazolium bromide Bromine salt: (W+Mo) (molar ratio) reaches 0.02:1, stir until uniform, and configure the initial reaction mixture; transfer the initial...

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Abstract

A surface amphiphilic nanometer tungsten-molybdenum sulfide hydrogenation catalyst and its preparation method and application, the tungsten source, the molybdenum source, the sulfur source, the reducing agent, the ionic liquid and the deionized water are formulated into the initial reaction mixture according to a certain order and method, and then Crystallize under hydrothermal conditions in a sealed high-pressure reactor, and the crystallized product is filtered, washed, and dried to obtain a surface amphiphilic nano-tungsten-molybdenum sulfide hydrogenation catalyst. The invention uses ionic liquid in the synthesis system, and the prepared nano-tungsten molybdenum sulfide has good surface amphiphilicity, and has excellent dispersibility and catalytic activity in both polar and non-polar catalytic reaction systems. The nanometer tungsten-molybdenum sulfide catalyst 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 shows 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-molybdenum sulfide catalyst and a preparation method and application thereof, which belong 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] Non-noble metal sulfides are layered materials with a graphene-like structure, which have shown promising applications in the fields of catalysis, microelectronics, and semiconductors. Supported tungsten sulfide and moly...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/051B82Y30/00B82Y40/00C10G45/04
Inventor 马怀军田志坚曲炜徐仁顺王炳春王从新潘振栋王冬娥李鹏
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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