UZM-26 Zeolite Catalyst Pore Dimensions and Ion Exchange
Solution Overview
Problem
Current hydrocarbon conversion processes lack efficient catalysts with unique structures to optimize hydrocarbon conversion reactions, as existing zeolites have limitations in pore dimensions and ion exchange capacity.
Innovation Solution
The use of UZM-26 and UZM-26X crystalline microporous zeolitic compositions, derived from UZM-26P and UZM-26PX through calcination and ion-exchange, offering distinct topologies and enhanced catalytic properties for hydrocarbon conversion processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing zeolites are used for hydrocarbon conversion, then catalytic activity is provided, but pore dimensions and ion exchange capacity are limited
Solution Approach 1:
The patent changes the fundamental structural parameters of zeolites by introducing a new MWW topology with specific unit cell dimensions (a=20.1 Å, b=20.1 Å, c=26.8 Å) and pore characteristics (10-membered rings with 5.3-5.6 Å openings). This creates unique pore dimensions and enhanced ion exchange capacity while maintaining catalytic reliability through the well-defined framework structure and adjustable cation composition
2Productivity
If new zeolite structures are developed to improve catalytic properties, then hydrocarbon conversion efficiency is enhanced, but structural complexity increases
Solution Approach 1:
The complex MWW structure is segmented into repeating unit cells with defined topology, where each unit cell contains specific framework elements and pore configurations. This segmentation allows the complex structure to be systematically characterized and reproduced, maintaining productivity while managing structural complexity through modular design
Solution Approach 2:
The zeolite structure is designed as a composite of silicon and aluminum tetrahedra arranged in a specific MWW topology, creating a composite aluminosilicate framework. This composite approach enables tuning of catalytic properties through varying Si/Al ratios while maintaining structural integrity, thus enhancing conversion efficiency without excessive complexity
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
These compositions provide improved catalytic performance by maintaining the structural integrity and ion exchange capabilities, enabling efficient conversion of hydrocarbons with tailored porosity and acidity, thus enhancing reaction efficiency and product yield.
Implementation Method 1
Zeolites can be used as catalysts for hydrocarbon conversion reactions, which can take place on outside surfaces as well as on internal surfaces within the pore
Implementation Method 2
M is at least one exchangeable cation selected from the group consisting of hydrogen ion, alkali, alkaline earth, and rare earth metals
Data Source
AI summary
This invention relates to hydrocarbon conversion processes using crystalline zeolitic compositions designated the UZM-26 and UZM-26X. UZM-26 is a microporous three-dimensional zeolitic composition that is derived from UZM-26P (an as synthesized layered composition) by calcination. UZM-26X is a microporous three-dimensional zeolitic composition that is derived from UZM-26PX by calcination, where UZM-26PX is an ion-exchanged form of UZM-26P.