1. Phosphorylated Polyacrylonitrile Fibers as an Efficient and Greener Acetalization Catalyst.
- Author
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Xu, Gang, Cao, Jian, Zhao, Yali, Zheng, Lishuo, Tao, Minli, and Zhang, Wenqin
- Subjects
X-ray photoelectron spectra ,PHOTOELECTRON spectra ,FOURIER transform infrared spectroscopy ,CHEMICAL industry ,ALDEHYDE analysis - Abstract
A novel solid acid catalyst (PAN
EAP F) is developed by immobilization of phosphoric acid on polyacrylonitrile fiber through covalent bonding. Various characterization techniques such as elemental analysis (EA), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR), etc. are utilized to confirm the successful grafting and the stability of the fiber catalysts during application. PANEAP F shows high catalytic activity in the acetalization of aldehydes owing to the high utilization efficiency of its functionalized acid sites. In addition, the strong polarity micro-environment in the surface layers of PANEAP F make it highly suitable for catalytic application in both water and alcohol. Furthermore, the fiber catalyst can be applied to the acetalization of aldehydes in a continuous-flow process at room temperature, and shows excellent reactivity and superior recyclability (over 20 times). The many advantages of PANEAP F such as simple preparation, convenient regulation of acid amount, high durability, and eco-friendly process make it very attractive for fixed-bed reactors in the chemical industry. [ABSTRACT FROM AUTHOR]- Published
- 2017
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