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Framework modification acid-alkali bifunctional ZSM-5 zeolite catalyst and method for preparing the same

A zeolite catalyst, ZSM-5 technology, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of catalyst loss of activity, reduction of single-pass reaction life, etc., to increase activity and stability, pore channels The effect of open, good molecular diffusion properties

Inactive Publication Date: 2008-05-21
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the reactants or reaction products are easy to coke in the zeolite pores, the catalyst loses its activity and reduces its single-pass reaction life, so it is limited in large-scale industrial applications.

Method used

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  • Framework modification acid-alkali bifunctional ZSM-5 zeolite catalyst and method for preparing the same
  • Framework modification acid-alkali bifunctional ZSM-5 zeolite catalyst and method for preparing the same
  • Framework modification acid-alkali bifunctional ZSM-5 zeolite catalyst and method for preparing the same

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Experimental program
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Effect test

specific Embodiment approach

[0041] (1) The concentration of methanol in the reaction solution is 40-95%; (2) The reaction temperature is 150-520°C; (3) The reaction space velocity is 1-4h -1 . The specific implementation is as follows:

[0042] implement

[0043] The specific examples of the ETE catalytic reaction on the framework-modified acid-base bifunctional ZSM-5 zeolite catalyst are shown in the following table: (1) The ethanol concentration of the reaction solution is 30-95%; (2) The reaction temperature is 150-300°C; (3) The space velocity 1~10h -1 . The specific implementation is as follows:

[0044] Example

[0045] 8

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Abstract

The invention pertains to a catalyst and application technology field thereof, which relates to a framework modification acid-alkali difunctional ZSM-5 zeolite catalyst and a preparation method and applications thereof. H-ZSM-5 zeolite is adopted by the catalyst as substrate material, and the substrate material is heated and hybrid reacted with nitrogenous modified raw material solvent and steam, then the catalyst is prepared. Part framework oxygen atom of the ZSM-5 zeolite of the catalyst is replaced by amine (nitrogen) group, thus the catalyst has acid-alkali difunctional catalyst property; the catalyst has the advantages of high crystallinity, open pore canal, comparatively larger specific surface, good molecular disperse property, high strength and excellent wearing resistance. Reclaiming process of the catalyst is convenient, and the reclaimed catalytic performance recovers well. The catalyst shows excellent catalytic activity, selectivity and stability in catalytic reactions of MTO, MTP, ETE and other alcohols dehydration to alkenes. The preparation method of acid-alkali difunctional ZSM-5 zeolite catalyst is simple, preparation cost is comparatively low and industrialized potential application range is wide.

Description

technical field [0001] The invention belongs to the technical field of catalyst materials and their applications, and in particular relates to a ZSM-5 zeolite catalyst and a preparation method thereof. Background technique [0002] Zeolite molecular sieve is an inorganic aluminosilicate or phosphate crystal, the skeleton contains regular and orderly arranged molecular-sized pores (ca. It is widely used in industrial processes such as catalysis, adsorption separation and ion exchange. [0003] A ZSM-5 zeolite (MFI type) molecular sieve developed by Mobil in 1972 [U.S. Patent 3702886, 1972] has a two-dimensional ten-membered ring channel (a ten-membered ring straight channel with an aperture of 0.54nm×0.56nm and a ten-membered Ring sinusoidal channel, the pore size is 0.51nm×0.54nm), is the most widely used catalytic material so far, it is one of the important active components in petroleum fluidized catalytic cracking (FCC) catalysts, and is used in petroleum hydrocracking ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/40C07C1/24C07C1/20C07C11/02
CPCY02P30/20Y02P30/40
Inventor 龙英才程晓维汪靖郭娟余辉陈筱诚
Owner FUDAN UNIV
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