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CuAPO-5 as a Multiphase Catalyst for Synthesis of Verbenone from α-Pinene
Hongyun Wang1, Haijun Cheng1, Fang Lai1
1School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China.
A novel copper(II)-containing aluminum phosphate (CuAPO-5) catalyst efficiently oxidizes α-pinene to verbenone. This recyclable catalyst achieves high conversion and selectivity, demonstrating its potential in chemical synthesis.
Area of Science:
- Materials Science
- Catalysis
- Organic Chemistry
Background:
- Heterogeneous catalysis is crucial for efficient chemical transformations.
- Aluminum phosphate molecular sieves offer tunable properties for catalytic applications.
- Developing selective oxidation catalysts for valuable chemical intermediates is an ongoing challenge.
Purpose of the Study:
- To synthesize and characterize a novel copper(II)-containing aluminum phosphate material (CuAPO-5).
- To evaluate the catalytic performance of CuAPO-5 for the oxidation of α-pinene to verbenone.
- To investigate the effects of reaction parameters and catalyst properties on the oxidation process.
Main Methods:
- Hydrothermal synthesis of CuAPO-5.
- Characterization using XRD, BET, XPS, NH3-TPD, SEM, EDS, ICP-OES, FT-IR, and UV-vis spectroscopy.
- Catalytic oxidation of α-pinene using CuAPO-5 under varying reaction conditions.
Main Results:
- CuAPO-5 catalysts exhibit AFI topology and high specific surface area.
- Copper is uniformly dispersed in a bivalent state within the material.
- Optimized conditions yielded 96.8% α-pinene conversion and 46.4% verbenone selectivity.
- The CuAPO-5(0.06) catalyst demonstrated excellent recyclability over five cycles.
Conclusions:
- CuAPO-5 is an effective multiphase catalyst for α-pinene oxidation.
- The catalyst's performance is influenced by copper content and reaction parameters.
- CuAPO-5 presents a stable and recyclable option for verbenone production.
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