کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
63151 | 47673 | 2007 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Nanosized and delayered zeolitic materials for the liquid-phase Beckmann rearrangement of cyclododecanone oxime
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
کاتالیزور
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The Beckmann rearrangement of the relatively bulky cyclododecanone oxime was carried out in batch and fixed-bed continuous reactors. With microporous molecular sieve catalysts, the process is controlled by diffusion within the micropores. Conversion, selectivity, and catalyst life are improved with the use of nanocrystalline materials. A solid acid catalyst formed by nanolayers of zeolite is more active and selective than either a nanocrystalline Beta zeolite or a mesoporous MCM-41 material, and the amount of organic remaining adsorbed on the catalyst after reaction is smaller in the former. Product desorption, activity, selectivity and catalyst life are much improved by using a nonprotic polar solvent and higher reaction temperatures.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Catalysis - Volume 250, Issue 1, 15 August 2007, Pages 161–170
Journal: Journal of Catalysis - Volume 250, Issue 1, 15 August 2007, Pages 161–170
نویسندگان
P. Botella, A. Corma, S. Iborra, R. Montón, I. Rodríguez, V. Costa,