کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
56306 | 47081 | 2011 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Influence of structural differences and acidic properties of phosphotungstic acids on their catalytic performance for acylation of pyruvate ester to α-acyloxyacrylate ester
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
کاتالیزور
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چکیده انگلیسی
Various heteropolyacids, including Keggin-type (H3PW12O40), Dawson-type (H6P2W18O62) and Preyssler-type (H14[NaP5W30O110]) phosphotungstic acids, were examined as catalysts for acylation of ethyl pyruvate with acetic anhydride to synthesize ethyl α-acetoxyacrylate in liquid phase. This compound is one of candidate monomers for bio-based polymers bearing high thermal durability and transparency. Catalytic performances correlated to the acid strength, the proton number and the stability of the phosphotungstic acids. Notably, performance of Preyssler-type phosphotungstic acid per unit mole of catalyst was higher than that of Keggin-type.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Catalysis Today - Volume 164, Issue 1, 30 April 2011, Pages 107–111
Journal: Catalysis Today - Volume 164, Issue 1, 30 April 2011, Pages 107–111
نویسندگان
Wataru Ninomiya, Masahiro Sadakane, Yutaro Ichi, Toshiya Yasukawa, Ken Ooyachi, Tsuneji Sano, Wataru Ueda,