Interzeolitic Conversion of Zeolite Frameworks for Catalytic Applications
Solution Overview
Problem
Current methods for synthesizing zeolitic materials with AEI-type framework structures are costly and lack the production of materials with novel physical and chemical properties suitable for improved catalytic applications, such as NOx reduction and methanol-to-olefins conversion.
Innovation Solution
A process involving interzeolitic conversion of zeolitic materials with FER-, TON-, BEA-, MEL-, MWW-, MFS-, and MFI-type framework structures to produce zeolitic materials with different framework structures, using structure directing agents and hydroxides, which allows for cost-effective production and enhanced properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional methods are used to synthesize zeolitic materials with AEI-type framework structures, then the desired framework structure is obtained, but the production cost is high
Solution Approach 1:
The patent changes the synthesis parameters by using interzeolitic conversion from existing zeolitic materials (FER, TON, BEA, MEL, MWW, MFS, or MFI types) instead of direct synthesis. This involves heating the starting material with structure directing agents and hydroxides to transform the framework structure into AEI-type, thereby reducing production cost while maintaining structural precision
Solution Approach 2:
The patent employs preliminary action by using pre-formed zeolitic materials with known stable framework structures as starting materials. These materials are then subjected to interzeolitic conversion to achieve the desired AEI-type framework, avoiding the need for costly direct synthesis from scratch
2Reliability
If conventional synthesis methods are used, then zeolitic materials with standard properties are produced, but materials with novel physical and chemical properties for improved catalytic applications are not obtained
Solution Approach 1:
The interzeolitic conversion process changes the physical and chemical parameters of the zeolitic material by transforming the framework structure from conventional types to AEI-type. This structural transformation creates novel properties such as specific pore sizes, surface areas, and catalytic sites that enhance performance in NOx reduction and methanol-to-olefins conversion
Solution Approach 2:
The patent creates composite functionality by combining the transformed AEI-type framework structure with specific cations (such as Cu, Fe, or other transition metals) introduced during the interzeolitic conversion process. This results in materials with both the unique pore structure of AEI-type zeolites and the catalytic activity of metal centers, enhancing versatility for different catalytic applications
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This process results in zeolitic materials with improved properties and increased versatility, enabling more efficient and selective catalytic conversions, particularly in NOx reduction and methanol-to-olefins processes.
Implementation Method 1
heating the mixture obtained in (1) for obtaining a second zeolitic material comprising SiO2 and X2O3 in its framework structure
Data Source
AI summary
The present invention relates to a process for the preparation of a zeolitic material SiO2 and X2O3 in its framework structure, wherein X stands for a trivalent element, wherein said process comprises interzeolitic conversion of a first zeolitic material comprising SiO2 and X2O3 in its framework structure, wherein the first zeolitic material has an FER-, TON-, MTT-, BEA-, MEL-, MWW-, MFS-, and/or MFI-type framework structure to a second zeolitic material comprising SiO2 and X2O3 in its framework structure, wherein the second zeolitic material obtained in (2) has a different type of framework structure than the first zeolitic material. Furthermore, the present invention relates to a zeolitic material per se as obtainable and/or obtained according to the inventive process and to its use, in particular as a molecular sieve, as an adsorbent, for ion-exchange, or as a catalyst and/or as a catalyst support.