Ferrierite Zeolite Catalyst for Methoxylated Aromatic Conversion
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Solution Overview
Problem
Current catalysts for hydrotreating methoxylated aromatic compounds and depolymerized lignin compositions are not stable in water or alcohol solvents, require co-feeding of H2S, and exhibit high costs, limiting their efficiency and longevity in converting these compounds to simple aromatic compounds like benzene, toluene, and xylenes.
Innovation Solution
A process using catalysts with transition metals from Group 8, 9, 10, or 11 metals supported by ferrierite zeolite, which allows for high yield and selectivity in converting methoxylated aromatic compounds to simple aromatic compounds without the need for H2S or organic solvents, and is stable in water or alcohol environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional catalysts are used for hydrotreating methoxylated aromatic compounds, then conversion to simple aromatic compounds can be achieved, but the catalysts are not stable in water or alcohol solvents and require co-feeding of H2S
Solution Approach 1:
The patent changes the chemical composition parameters of the catalyst by incorporating ferrierite zeolite with specific Si/Al ratios (5-20) and transition metals (Co, Ni, Cu, Zn, or their combinations) at controlled loadings (1-20 wt%). This compositional parameter optimization enables the catalyst to achieve stability in water and alcohol environments without requiring H2S co-feeding, while maintaining high conversion efficiency for methoxylated aromatic compounds
Solution Approach 2:
The patent employs a composite catalyst material consisting of ferrierite zeolite as the base support combined with transition metals (Co, Ni, Cu, Zn) or their oxides/sulfides. This composite structure leverages the synergistic effects between the zeolite framework and metal components, providing both structural stability in aqueous/alcoholic media and catalytic activity for C-O bond cleavage, thereby eliminating the need for H2S co-feeding while maintaining reliability
2Productivity
If conventional catalysts are used for hydrotreating, then conversion can occur, but the catalysts exhibit high costs
Solution Approach 1:
The patent replaces expensive conventional catalysts (such as those based on precious metals or complex sulfided catalysts requiring H2S) with a more economical catalyst system based on ferrierite zeolite supported by common transition metals (Co, Ni, Cu, Zn). These metals are abundant and less costly, and the catalyst maintains sufficient activity and stability for industrial application, thereby reducing catalyst cost while preserving productivity
Solution Approach 2:
The patent optimizes the metal loading parameters within specific ranges (1-20 wt% transition metals on ferrierite) to achieve the minimum effective concentration that provides both high conversion efficiency and cost-effectiveness. By controlling metal content and distribution parameters, the catalyst achieves optimal performance at lower cost compared to conventional high-metal-loading or precious-metal-based systems
3Productivity
If conventional catalysts are used, then hydrotreating can proceed, but they require co-feeding of H2S which limits efficiency and longevity
Solution Approach 1:
The patent extracts and eliminates the requirement for H2S co-feeding from the conventional hydrotreating process by designing a catalyst based on ferrierite zeolite with transition metals that can perform C-O bond cleavage and hydrogenation reactions without sulfur promotion. This extraction of the H2S dependency enables the catalyst to operate with extended longevity and improved efficiency in water or alcohol environments without sulfur contamination
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
The process achieves high yield, selectivity, and conversion efficiency while maintaining catalyst activity, enabling the production of valuable aromatic compounds like phenol, benzene, and xylenes from lignin-derived materials with improved safety and reduced costs.
Implementation Method 1
a process using catalysts with transition metals from Group 8, 9, 10, or 11 metals supported by ferrierite zeolite, which allows for high yield and selectivity in converting methoxylated aromatic compounds to simple aromatic compounds
Implementation Method 2
hydrotreating of depolymerized lignin compositions to simple aromatic compounds, such as, benzene, toluene, and xylenes with high yield, selectivity, and conversion
Implementation Method 3
The process achieves high yield, selectivity, and conversion efficiency while maintaining catalyst activity, enabling the production of valuable aromatic compounds like phenol, benzene, and xylenes from lignin-derived materials
Data Source
AI summary
Hydrotreating catalysts and processes useful for the conversion of methoxylated aromatic compounds to simple aromatic compounds are provided. The catalysts comprise transition metal selected from the group consisting of Group 8 metals, Group 9 metals, Group 10 metals, Group 11 metals, and mixtures thereof, and catalyst support selected from the group consisting of shape-selective zeolite, silica, titania, zirconia, and mixtures thereof.