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Catalyst for aromatization of lower hydrocarbons and process for production of aromatic compounds

A kind of technology of aromatic compound and catalyst, applied in the field of preparation of said catalyst

Inactive Publication Date: 2013-11-13
MEIDENSHA ELECTRIC MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the catalysts disclosed in Patent Documents 1 to 3 are used, the active life of the catalyst is significantly shortened as the reaction temperature between the catalyst and the raw material increases.

Method used

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  • Catalyst for aromatization of lower hydrocarbons and process for production of aromatic compounds
  • Catalyst for aromatization of lower hydrocarbons and process for production of aromatic compounds
  • Catalyst for aromatization of lower hydrocarbons and process for production of aromatic compounds

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] The catalyst of Example 1 was prepared by supporting molybdenum and copper. The catalyst of Example 1 was prepared by the same preparation method as that of the catalyst of Comparative Example 1 (including molding, drying, roasting and carburizing treatment), but the impregnation process was different.

[0068] In the impregnation process of Example 1, the impregnation solution prepared by copper acetate and ammonium molybdate was stirred, and then the shaped carrier ZSM-5 prepared in the molding method described in Comparative Example 1 was immersed in the stirred impregnation solution , thereby impregnating the shaped support with a molybdenum component and a copper component. The carrier was then dried and calcined in air to obtain a ZSM-5 carrier loaded with molybdenum and copper. When preparing the impregnating solution, it has been set that the loading of molybdenum is 6wt% based on the total amount of carrier after sintering, and the loading of copper is set acc...

Embodiment 2

[0096] The catalyst of Example 2 was prepared by loading copper and molybdenum according to the molar ratio of copper to molybdenum of 0.1:1.0. Using the same preparation method as the catalyst of Comparative Example 1 (including molding, drying, roasting and carburizing), the catalyst of Example 2 was prepared, but the size of the shaped carrier and the impregnation process were different.

[0097] In the molding process of this example, the mixture of inorganic components, organic binders and water described in Comparative Example 1 is extruded into strips (diameter 2.4mm, length 5mm). In the impregnation process of this example, the impregnation solution prepared by copper acetate and ammonium molybdate was stirred. The shaped carrier including ZSM-5 formed in the forming process is then immersed in the stirred impregnating liquid, thereby impregnating the shaped carrier with molybdenum component and copper component. The carrier was dried and then calcined in air to obta...

Embodiment 3

[0099] The catalyst of Example 3 was prepared by loading copper and molybdenum according to the molar ratio of copper to molybdenum of 0.3:1.0. Using the same preparation method as the catalyst of Comparative Example 1 (including molding, drying, roasting and carburizing), the catalyst of Example 3 was prepared, but the size of the shaped carrier and the impregnation process were different.

[0100] In the molding process of this example, the mixture of inorganic components, organic binders and water described in Comparative Example 1 is extruded into strips (diameter 2.4mm, length 5mm). In the impregnation process of this example, the impregnation solution prepared by copper acetate and ammonium molybdate was stirred. The shaped carrier including ZSM-5 formed in the forming process is then immersed in the stirred impregnating liquid, thereby impregnating the shaped carrier with molybdenum component and copper component. The carrier was dried and then calcined in air to obta...

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Abstract

A catalyst for the aromatization of lower hydrocarbons which is improved in the life stability of activity on the conversion of methane, formation rate of benzene, formation rate of naphthalene, and total formation rate of benzene, toluene and xylene, prepared by making molybdenum and copper supported on a carrier metallosilicate and then firing the obtained intermediate. The production of aromatic compounds can be conducted by bringing a reactant gas containing a lower hydrocarbon and carbon dioxide into contact with the catalyst. The catalyst is prepared preferably by modifying a zeolite consisting of a metallosilicate with a silane compound which has a molecular size larger than the pore size of the zeolite and bears both an amino group selectively reactive with a Brfnsted acid site ofthe zeolite and a linear hydrocarbon group and then making molybdenum and copper supported on the modified zeolite. It is preferable that the amount of molybdenum supported on the carrier be 2 to 12wt% based on the whole catalyst after firing, while the Cu:Mo mole ratio (=X:1) be 0.01 to 0.8.

Description

technical field [0001] The invention relates to the advanced utilization of natural gas, biogas and methane hydrate etc. with methane as the main component. Natural gas, biogas, and methane hydrate are considered to be effective energy sources for preventing global warming, and interest in technologies that utilize such resources is growing. Since the clean properties of methane can be fully utilized, it can be expected that methane resources will be the next generation of new organic resources, or hydrogen sources that can be used in fuel cells. More particularly, the present invention relates to a catalytic chemical conversion technology for efficiently producing aromatic compounds and high-purity hydrogen from methane, and a preparation method of the catalyst. Examples of resulting aromatic compounds are benzene and naphthalene, which are raw materials for some chemicals such as plastics. Background technique [0002] As a method of producing hydrogen and aromatic compo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/48C10G35/095C01B3/40
CPCB01J21/16B01J23/885B01J29/0308B01J29/041B01J29/40B01J37/0201B01J37/088B01J37/18C01B3/40C01B2203/02C01B2203/1241C10G45/68C10G2400/30B01J29/076B01J29/48B01J29/7876B01J2229/12B01J2229/123B01J2229/32B01J2229/40C07C2/76Y02P20/52B01J35/40C07C15/02
Inventor 山田真一山田知弘小川裕治秋山广一畑岸琢弥
Owner MEIDENSHA ELECTRIC MFG CO LTD
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