SSZ-112 Molecular Sieve Mixed-Template Synthesis
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Solution Overview
Problem
There is a need for a novel aluminosilicate molecular sieve with an AFT framework type that can be effectively synthesized and utilized in catalytic and sorption processes, as existing zeolitic materials may not offer optimal performance due to limitations in pore size and organic template usage.
Innovation Solution
The synthesis of aluminosilicate molecular sieve SSZ-112 using a mixed-template approach with hexamethonium dications and 1-methyl-1-alkylpyrrolidinium or 1-methyl-1-piperidinium cations, along with silicon and aluminum oxide sources, to create a material with specific pore structure and catalytic properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single organic template is used in the synthesis of AFT framework type molecular sieve, then the synthesis process is simpler, but the catalytic activity and sorption capabilities are insufficient
Solution Approach 1:
The patent combines two different organic templates (hexamethonium dication and 1-methyl-1-alkylpyrrolidinium or 1-methyl-1-alkylpiperidinium cation) in a mixed-template synthesis approach. This merging of multiple templating agents enables the formation of the AFT framework type molecular sieve with enhanced catalytic activity and sorption capabilities, resolving the contradiction between synthesis simplicity and performance effectiveness.
2Ease of manufacture
If existing zeolitic materials are used, then the synthesis methodology is well-established, but the pore size and organic template usage limit optimal performance
Solution Approach 1:
The patent changes the parameters of the synthesis system by introducing a mixed-template approach with specific templates (hexamethonium dication and 1-methyl-1-alkylpyrrolidinium or 1-methyl-1-alkylpiperidinium cation) and using zeolite Y as a source of silicon and aluminum oxide. This parameter change enables the formation of AFT framework type molecular sieve with optimized pore size and improved adaptability for various catalytic and sorption applications.
3Ease of operation
If conventional molecular sieves are used for organic compound conversion, then the process is straightforward, but the conversion efficiency and selectivity are suboptimal
Solution Approach 1:
The patent creates a composite catalytic system by synthesizing AFT framework type molecular sieve with a specific mixed-template composition containing hexamethonium dication and 1-methyl-1-alkylpyrrolidinium or 1-methyl-1-alkylpiperidinium cation. This composite material structure provides enhanced conversion efficiency and selectivity for organic compound conversions while maintaining ease of operation through a well-defined synthesis procedure.
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
SSZ-112 demonstrates enhanced catalytic activity and sorption capabilities, enabling efficient conversion of organic compounds and separation of molecular species based on size and polarity, with potential applications in industrial processes such as alkylation, cracking, and nitrogen oxide reduction.
Implementation Method 1
subjecting the reaction mixture to crystallization conditions sufficient to form crystals of the aluminosilicate molecular sieve
Implementation Method 2
separation of molecular species based on size and polarity
Data Source
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AI summary
An aluminosilicate molecular sieve of AFT framework type, designated SSZ-112, is provided. SSZ-112 is synthesized using a mixed-template method. SSZ-112 may be used in catalytic and sorptive processes.