SSZ-104 Molecular Sieve Synthesis via Templating
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Solution Overview
Problem
There is a continuous need for new crystalline molecular sieves with unique sieving characteristics and catalytic properties for enhanced gas separation, drying, hydrocarbon, and chemical conversions, as existing molecular sieves may not offer the desired selectivities and efficiencies in these processes.
Innovation Solution
The synthesis of a new crystalline molecular sieve, SSZ-104, using N-cyclohexylmethyl-N-ethylpyrrolidinium cations as a structure directing agent, which provides a unique X-ray diffraction pattern and chemical composition, allowing for its use as an adsorbent and catalyst in various conversion processes, including nitrogen oxide reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If existing molecular sieves are used for gas separation and hydrocarbon conversion, then basic catalytic properties are provided, but desired selectivities and efficiencies are not achieved
Solution Approach 1:
The patent changes the structural parameters of molecular sieves by introducing new pore architectures and modifying framework compositions (ratios of SiO2, Al2O3, and other oxides) to achieve enhanced selectivities and catalytic efficiencies for specific reactions such as gas separation and hydrocarbon conversion
Solution Approach 2:
The patent creates composite molecular sieve materials by combining multiple oxide components (SiO2, Al2O3, B2O3, Ga2O3, Fe2O3, TiO2, SnO2, GeO2) in specific ratios to develop new crystalline structures with tailored pore sizes and surface properties that improve both selectivity and catalytic performance
2Manufacturing precision
If new molecular sieve structures with novel internal pore architectures are developed, then enhanced selectivities are achieved, but synthesis complexity increases
Solution Approach 1:
The patent uses structure directing agents (SDAs) such as quaternary ammonium compounds and cyclic carboxylates as intermediaries to guide the self-assembly of molecular sieve structures during synthesis, enabling the formation of complex novel pore architectures through templating effects without requiring complex external control mechanisms
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-104 demonstrates improved selectivities and efficiencies in gas separation, hydrocarbon conversion, and nitrogen oxide reduction, offering enhanced performance in catalytic processes and adsorption applications.
Implementation Method 1
subjecting the reaction mixture to crystallization conditions sufficient to form crystals of the molecular sieve
Implementation Method 2
N-cyclohexylmethyl-N-ethylpyrrolidinium cations as a structure directing agent
Implementation Method 3
use as an adsorbent and as a catalyst
Implementation Method 4
catalyst comprising an active form of the molecular sieve
Data Source
Figure 1(a)~1(c)
Figure 2
AI summary
Disclosed herein is a new crystalline molecular sieve designated SSZ-104, its synthesis in the presence of a structure directing agent comprising N-cyclohexylmethyl-N-ethylpyrrolidinium cations, and its use as an adsorbent and a catalyst.