High-selectivity catalyst for naphthalene hydrogenation reaction for preparing tetrahydronaphthalene and preparation method thereof

A high-selectivity, catalyst technology, applied in the direction of molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems that precious metals cannot meet industrial production, achieve broad industrial application prospects, shorten pyrolysis process, avoid Paradoxical effect of high cost

Inactive Publication Date: 2012-07-25
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The most widely used single-source precursor is molybdenum-hexamethylenetetramine complex, and it has been reported that molybdenum carbide can be prepared by using traditional temperature-programmed pyrolysis (Chem.Mater., 2007, 19, 1801-1807), but in addition to the molybdenum-hexamethylenetetramine complex, a large amount of hexamethylenetetramine needs to be added during the preparation process, and the CH generated by pyrolysis of hexamethylenetetramine 4 As the carbon source of the carburizing process, from a microscopic point of view, the process is not a re

Method used

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  • High-selectivity catalyst for naphthalene hydrogenation reaction for preparing tetrahydronaphthalene and preparation method thereof
  • High-selectivity catalyst for naphthalene hydrogenation reaction for preparing tetrahydronaphthalene and preparation method thereof
  • High-selectivity catalyst for naphthalene hydrogenation reaction for preparing tetrahydronaphthalene and preparation method thereof

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Embodiment 1

[0020] The preparation of embodiment 1 activated carbon supported molybdenum carbide catalytic material

[0021] A certain amount of molybdenum-hexamethylenetetramine complex was added into 1 milliliter of ammonia water with a concentration of 15%. After fully dissolving, 0.1 g of activated carbon was weighed and added to the solution, and the solvent was naturally evaporated at room temperature. °C for 3 hours to obtain the precursor of molybdenum carbide. Molybdenum carbide precursors with different molybdenum loadings can be prepared by changing the amount of molybdenum-hexamethylenetetramine complex added. Place the precursor in a microwave reactor, blow it with argon for 2 hours, turn on the microwave at 800W and heat it for 30min under an argon atmosphere. After the sample is cooled, it is identified as Mo by X-ray powder diffraction. 2 c.

Embodiment 2

[0022] The preparation of the molybdenum carbide catalytic material of embodiment 2SBA-15 loading nickel modification

[0023] A certain amount of molybdenum-hexamethylenetetramine complex is added to 1 ml of 15% ammonia water, and 1 ml of 15% ammonia water is added. After fully dissolving, add 0.1 g of activated carbon into the solution, evaporate the solvent naturally at room temperature, and dry in a vacuum oven at 80°C for 3 hours to obtain a nickel-modified molybdenum carbide precursor. Nickel-modified molybdenum carbide precursors with different loadings of molybdenum and nickel can be prepared by changing the addition amount of molybdenum-hexamethylenetetramine complex and nickel nitrate hexahydrate. Since the molybdenum carbide precursor modified by SBA-15 loaded with nickel does not absorb microwaves and cannot heat itself under the action of microwaves, 0.05g of zirconia is mixed with the precursor and placed in a microwave reactor (zirconia is used to absorb microwa...

Embodiment 3 2

[0024] The preparation of the molybdenum carbide catalytic material of embodiment 3 silica loaded cobalt modification

[0025] A certain amount of molybdenum-hexamethylenetetramine complex is added to 1 ml of 15% ammonia water, and 1 ml of 15% ammonia water is added. After being fully dissolved, 0.1 g of silicon dioxide was weighed and added to the solution, the solvent was naturally evaporated at room temperature, and dried in a vacuum oven at 80°C for 3 hours to obtain a cobalt-modified molybdenum carbide precursor. Cobalt-modified molybdenum carbide precursors with different loadings of molybdenum and cobalt can be prepared by changing the addition amount of molybdenum-hexamethylenetetramine complex and cobalt chloride hexahydrate. Since the silica-supported cobalt-modified molybdenum carbide precursor does not absorb microwaves and cannot heat itself under the action of microwaves, 0.05g of zirconia is mixed with the precursor and placed in a microwave reactor (zirconia is...

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Abstract

The invention discloses high-selectivity carbide catalyst for naphthalene hydrogenation reaction for preparing tetrahydronaphthalene and a quick microwave preparation method thereof, belonging to the technical field of catalyst material application and preparation. The method comprises the steps of: fully grinding complex compounds containing relevant metals and carriers, or supporting the complex compounds containing the relevant metals onto the surfaces of carriers through a solution impregnation method and conducting microwave pyrolysis in inert gas to form the supported carbide catalyst. The invention provides the high-efficiency carbide catalyst with 100 percent selectivity aiming at the naphthalene hydrogenation reaction for preparing the tetrahydronaphthalene and a simple, convenient, quick, environmental-friendly and energy-saving preparation method thereof. The prepared carbide particles are evenly dispersed on the carriers, so that the situation of surface carbon deposition is avoided. The contradiction between high catalyst selectivity and high cost is successfully avoided, and therefore the high-selectivity carbide catalyst and the preparation method thereof have promising industrial application prospect.

Description

technical field [0001] The invention belongs to the technical field of application and preparation of catalytic materials, and relates to a carbide catalytic material with high selectivity for the reaction of hydrogenation of naphthalene to prepare tetrahydronaphthalene and a preparation method thereof, in particular to a rapid microwave preparation of carbide catalytic materials method, and the prepared carbide catalytic material is used in reactions such as hydrogenation of naphthalene to prepare tetrahydronaphthalene. Background technique [0002] The hydrogenation reaction of naphthalene is often used as a probe for the hydrogenation series of aromatics to study the mechanism of the reaction, which has important theoretical value and guiding significance in the field of petroleum refining. At the same time, the two products of naphthalene hydrogenation reaction: tetrahydronaphthalene and decahydronaphthalene are industrial products with rich practical value. Tetrahydron...

Claims

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Application Information

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IPC IPC(8): B01J27/22B01J29/03B01J29/76H01M4/90C07C13/48C07C5/11
CPCY02E60/50
Inventor 梁长海庞敏刘春艳
Owner DALIAN UNIV OF TECH
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