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H3PW12O40 immobilized on silylated palygorskite and catalytic activity in esterification reactions
AbstractThe surface of acid-activated palygorskite (Pa) was modified by grafting 3-aminopropyltriethoxysilane (APTES) (the silylated Pa denoted PaAPTES) for immobilization of phosphotungstic acid (H3PW12O40, HPW). The samples were characterized by Fourier transform infrared spectroscopy (FTIR), N2 adsorption–desorption, X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), and transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS). The catalytic activity was tested for the esterification of n-butanol with acetic acid. Both HPW/PaAPTES and HPW/Pa showed high and specific catalytic activity on the first use. Repeated use, decreased the catalytic activity of HPW/PaAPTES slowly, that of HPW/Pa strongly. Due to its unique properties, low cost and ready availability, HPW/PaAPTES provides a satisfactory option for catalyzing esterification reactions.
H3PW12O40 immobilized on silylated palygorskite and catalytic activity in esterification reactions
AbstractThe surface of acid-activated palygorskite (Pa) was modified by grafting 3-aminopropyltriethoxysilane (APTES) (the silylated Pa denoted PaAPTES) for immobilization of phosphotungstic acid (H3PW12O40, HPW). The samples were characterized by Fourier transform infrared spectroscopy (FTIR), N2 adsorption–desorption, X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), and transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS). The catalytic activity was tested for the esterification of n-butanol with acetic acid. Both HPW/PaAPTES and HPW/Pa showed high and specific catalytic activity on the first use. Repeated use, decreased the catalytic activity of HPW/PaAPTES slowly, that of HPW/Pa strongly. Due to its unique properties, low cost and ready availability, HPW/PaAPTES provides a satisfactory option for catalyzing esterification reactions.
H3PW12O40 immobilized on silylated palygorskite and catalytic activity in esterification reactions
Zhang, Lixia (Autor:in) / Jin, Qingzhe (Autor:in) / Shan, Liang (Autor:in) / Liu, Yuanfa (Autor:in) / Wang, Xingguo (Autor:in) / Huang, Jianhua (Autor:in)
Applied Clay Science ; 47 ; 229-234
14.10.2009
6 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
H3PW12O40 immobilized on silylated palygorskite and catalytic activity in esterification reactions
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