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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, applied in physical/chemical process catalysts, nanotechnology for materials and surface science, chemical instruments and methods, etc., can solve the problem of complex composition of heavy oil and poor dispersion of tungsten sulfide Very ideal and other problems, to achieve good application prospects, good catalytic activity, good surface amphiphilic effect

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 dithiotungstate to 500mL deionized water to make the concentration of tungsten reach 0.02mol / L, and stir until uniform; add a certain amount of molybdenum acid to make the concentration of molybdenum reach 0.15mol / L to the above mixture Add sodium sulfide aqueous solution to make Na 2 S: (W+Mo) (molar ratio) reaches 2.2:1, stir until uniform, and react at 65°C for 12h; 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 22:1, stirred until uniform, and configured as an initial reaction mixture; the ...

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 tetrathiotungstate to 500mL deionized water to make the concentration of tungsten reach 0.5mol / L, and stir until uniform; add a certain amount of ammonium molybdate to make the concentration of molybdenum reach 0.001mol / L; stir until Add potassium sulfide aqueous solution evenly to the above mixture to make K 2 S: (W+Mo) (molar ratio) reaches 4.5:1, stir until uniform, and react at 65°C for 16h; add potassium borohydride to the above mixture to make potassium borohydride: (W+Mo) (molar ratio) reach 2.6:1, 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 15:1, stirred until uniform, and configured as ...

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 potassium dithiotungstate to 500mL deionized water to make the concentration of tungsten reach 1.5mol / L, and stir until uniform; add a certain amount of sodium molybdate to make the concentration of molybdenum reach 0.5mol / L, and stir until Uniform; add hydrogen sulfide aqueous solution to the above mixture, make hydrogen sulfide: (W+Mo) (molar ratio) reach 2.4:1, stir until uniform, react at 65°C for 18h; add polyethyleneimine to the above mixture, make Polyethyleneimine: (W+Mo) (molar ratio) reaches 2:1, stir until uniform; add ionic liquid 1-pentyl-3-methylimidazolium bromide to the above mixture to make 1-pentyl-3 -Methylimidazolium bromide: (W+Mo) (molar ratio) reaches 20:1, stir until uniform, and configure the initial reaction mixture; transfer the initial reactio...

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Abstract

A surface amphiphilic nano-tungsten-molybdenum sulfide hydrogenation catalyst and its preparation method and application, the sulfur-containing tungsten source, molybdenum source, sulfur source, reducing agent, ionic liquid and deionized water are formulated into an initial reaction mixture in a certain order and method , and then crystallized under hydrothermal conditions in a sealed high-pressure reactor, and the crystallized product was 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): B01J27/047C10G45/04B82Y30/00B82Y40/00
Inventor 马怀军田志坚徐仁顺王炳春王从新潘振栋王冬娥李鹏曲炜
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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