Nanoparticle Catalysts for Cyclohexanol Conversion
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Solution Overview
Problem
Current methods for converting cyclohexanol to cyclohexanone, such as hydrogenation of phenol or oxidation of cyclohexane, produce byproducts and require improvements in efficiency and selectivity.
Innovation Solution
A microporous copper chloropyrophosphate (CuClP) framework with noble metal nanoparticles, specifically platinum, palladium, or gold, is used as a catalyst to convert cyclohexanol to cyclohexanone, with activation temperatures and environments optimizing nanoparticle formation for enhanced catalytic performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional methods (hydrogenation of phenol or oxidation of cyclohexane) are used to produce cyclohexanone, then cyclohexanone can be produced, but byproducts are formed and efficiency and selectivity require improvement
Solution Approach 1:
The patent employs a microporous copper chloropyrophosphate (CuClP) framework material with controlled pore sizes and structures. The microporous structure provides shape-selective catalysis, allowing only desired reaction pathways to proceed while blocking pathways that lead to byproducts, thereby improving selectivity and reducing unwanted substance formation
Solution Approach 2:
The catalyst is a composite material combining copper chloropyrophosphate framework with noble metal nanoparticles (platinum, palladium, or gold). This composite structure synergistically combines the framework's selective catalytic properties with the noble metals' high catalytic activity, achieving both high selectivity for cyclohexanone and high conversion efficiency
2Productivity
If noble metal nanoparticles are incorporated into the CuClP framework, then catalytic activity and selectivity improve, but catalyst complexity increases
Solution Approach 1:
The noble metal nanoparticles are not distributed uniformly throughout the catalyst but are specifically localized within the microporous CuClP framework at sites where they provide maximum catalytic benefit. This local concentration of active species enhances catalytic activity while maintaining a relatively simple overall catalyst structure
Solution Approach 2:
The noble metal nanoparticles are nested within the microporous CuClP framework structure. The framework acts as a host matrix that contains and stabilizes the noble metal nanoparticles, creating a hierarchical nested structure where the simpler framework encloses the more complex nanoparticle catalysts, thereby managing complexity while enhancing functionality
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 catalyst achieves high conversion and selectivity for cyclohexanone production, maintaining structural integrity and catalytic activity over extended periods, with platinum catalysts showing superior performance in aerobic oxidation reactions.
Implementation Method 1
A microporous copper chloropyrophosphate (CuClP) framework with noble metal nanoparticles, specifically platinum, palladium, or gold, is used as a catalyst to convert cyclohexanol to cyclohexanone
Implementation Method 2
platinum catalysts showing superior performance in aerobic oxidation reactions
Implementation Method 3
activating the catalyst by heating the catalyst precursor at a temperature of at least 150 °C to convert the precursor complexes to noble metal nanoparticle sites
Implementation Method 4
heating the catalyst precursor at a temperature of at least 150 °C to convert the precursor complexes to noble metal nanoparticle sites
Data Source
Figure 1A~1B
Figure 2A~3
Figure 4A
AI summary
Methods for converting an alcohol, such as cyclohexanol to a ketone, such as cyclohexanone, include reacting the alcohol in the presence of a catalyst and oxygen to produce the ketone. In one exemplary embodiment, the catalyst comprises a microporous copper chloropyrophosphate framework including a plurality of noble metal nanoparticles. In one exemplary embodiment, the noble metal nanoparticles include at least one metal selected from the group consisting of platinum, palladium, and gold.