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Phosphorylated Polyacrylonitrile Fibers as an Efficient and Greener Acetalization Catalyst
Author(s) -
Xu Gang,
Cao Jian,
Zhao Yali,
Zheng Lishuo,
Tao Minli,
Zhang Wenqin
Publication year - 2017
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201700846
Subject(s) - polyacrylonitrile , catalysis , x ray photoelectron spectroscopy , fourier transform infrared spectroscopy , phosphoric acid , fiber , chemical engineering , reactivity (psychology) , materials science , chemistry , grafting , polymer , organic chemistry , medicine , alternative medicine , pathology , engineering
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. PAN EAP 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 PAN EAP 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 PAN EAP 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.