Multi-metal body catalyst with layered structure, preparation and applications thereof

A bulk catalyst and layered structure technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, chemical instrument and method, etc., can solve environmental unfriendliness, environmental pollution, catalyst specific surface area and small pore volume to achieve high hydrodesulfurization activity, easy operation and high dispersion

Inactive Publication Date: 2016-02-10
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage of this kind of synthetic method is that the strong ammonia water is used in the synthetic process, which will pollute the environment.
Since the raw material used in this patent is basic nickel carbonate, which is insoluble in water, the essential reaction of the synthesis process is the replacement reaction between ions and solids, so it is difficult to synthesize catalyst particles with small grains
Chinese patents CN101544904A, CN101153228A, and CN101733120A also disclose a preparation method of a NiMoW three-metal bulk catalyst and its application in ultra-deep desulfurization of diesel oil; although the prepared catalyst shows relatively high activity in ultra-deep desulfurization of diesel oil, the catalyst The specific surface area and pore volume are still small
[0011] (1) The raw materials used are not environmentally friendly;
[0012] (2) catalyst preparation cost is higher;
[0013] (3) The specific surface area, pore volume and activity of the catalyst need to be further improved

Method used

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  • Multi-metal body catalyst with layered structure, preparation and applications thereof
  • Multi-metal body catalyst with layered structure, preparation and applications thereof
  • Multi-metal body catalyst with layered structure, preparation and applications thereof

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preparation example Construction

[0055] The preparation method of the present invention is briefly described as follows:

[0056] a) performing a co-precipitation reaction on a mixed aqueous solution of a soluble salt of a Group VIII metal to obtain a catalyst precursor with a layered structure;

[0057] b) conducting anion exchange reaction between the slurry of the layered structure catalyst precursor and the mixed solution containing at least two kinds of VIB group metal anion groups.

[0058] In detail, the preparation method of the present invention comprises the following steps:

[0059] a) adding the at least one soluble salt of Group VIII metal, a soluble salt of +2-valent metal and a soluble salt of +3-valent metal into a solvent to prepare a mixed solution of soluble salts, and then alkaline precipitation The agent is dissolved in water to form a solution, and finally the alkaline precipitant is added to the mixed solution of the above-mentioned soluble salts for co-precipitation reaction, and the ...

Embodiment 1

[0084] The present embodiment illustrates the preparation of the NiZnAlMoW bulk catalyst in the present invention:

[0085] a) Weigh nickel nitrate (29.08g, wherein Ni 2+ 0.1mol), zinc nitrate (1.49g, of which Zn 2+ 0.005mol) and aluminum nitrate (3.75g, where Al 3+ 0.01mol), they were dissolved in 200ml of mixed solvent containing water, organic solvent and surfactant (according to the volume ratio, water: organic solvent: surfactant=100:95:5), slowly added 0.2 mol / L NaOH aqueous solution, adjusted to pH=12, and heated to a reaction temperature of 80°C to form a light green mixed reaction solution, which was refluxed at a reaction temperature of 80°C for 25 hours to obtain a light green product; The product is filtered and washed to obtain a catalyst precursor (i.e. a Ni-LHS catalyst precursor with a layered structure); this catalyst precursor is added to 200ml of water to be configured as a slurry precursor (a);

[0086] b) Weigh ammonium molybdate (5.4g, wherein Mo 6+ 0...

Embodiment 2

[0089] The present embodiment illustrates the preparation of the NiZnAlMoW bulk catalyst in the present invention:

[0090] Weigh nickel sulfate (26.29g, wherein Ni 2+ 0.1mol), zinc nitrate (1.49g, of which Zn 2+ 0.005mol) and aluminum nitrate (3.75g, where Al 3+ 0.01mol), replace nickel nitrate (29.08g, wherein Ni 2+ 0.1mol), zinc nitrate (1.49g, of which Zn 2+ 0.005mol) and aluminum nitrate (3.75g, where Al 3+ 0.01mol), prepare multi-metal bulk catalyst (16.4g) in the same manner as described in Example 1, the multi-metal bulk catalyst of synthesis is expressed with 2-cat., the material morphology of this 2-cat. catalyst Similar to 1-cat. Catalyst. The XRD characterization results of its precursor 2-NiZnAl-LDH and catalyst are listed in figure 1 , the TEM characterization of the precursor 2-NiZnAl-LDH as figure 2 As shown, the morphology of the sulfided catalyst maintains a layered structure as image 3 shown. Its ultra-high hydrodesulfurization activity such as ...

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Abstract

The invention relates to a multi-metal body catalyst with a layer structure. The catalyst is applied to ultra-deep hydro-desulfurization and is composed of at least one metal from the VIII group, one divalent metal, one trivalent metal, and at least two metals from the VIB group. The catalyst is characterized by being composed of the following components (calculated in the form of oxides) in percentage by weight: 1 to 50 wt% of VIII metal, 1 to 50% of VIB metal, 1 to 50 wt% of divalent metal, and 1 to 50 wt% of trivalent metal. The invention also discloses a preparation method of the catalyst and applications thereof. The provided catalyst can be applied to hydro-desulfurization of diesel fraction containing 4,6-dimethyldibenzothiophene, and has an extremely-high hydro-desulfurization activity, the ultra-deep desulfurization is achieved, and the catalyst cost is reduced by introducing cheap divalent metal and trivalent metal.

Description

technical field [0001] The invention relates to a multi-metal bulk catalyst for ultra-deep hydrodesulfurization with a layered structure. [0002] The present invention also relates to a method for preparing the above-mentioned catalyst. [0003] The invention also relates to the application of the above-mentioned catalyst in ultra-deep hydrodesulfurization reaction of sulfur-containing compounds. Background technique [0004] Due to the decline of oil reserves, the problem of heavy and inferior oil has become more and more prominent. The high-sulfur crude oil in the world is increasing year by year, and the environmental legislation of various countries has increasingly stringent requirements for limiting the sulfur content in fuel oil. Therefore, the development of ultra-deep processing oil with excellent performance Hydrogen desulfurization catalysts have not only become the core of the field of hydrodesulfurization, but also make hydroprocessing technology more and more...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/888B01J23/889C10G45/08
Inventor 李灿蒋宗轩陈燕蝶刘铁峰
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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