کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9607827 46059 2005 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Mg,Al-mixed oxide system: Synthesis under hydrothermal conditions, physico-chemical characterisation and application as an efficient catalyst for imidazole methylation
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Mg,Al-mixed oxide system: Synthesis under hydrothermal conditions, physico-chemical characterisation and application as an efficient catalyst for imidazole methylation
چکیده انگلیسی
Mg,Al-mixed oxide catalyst with molar ratio 1:2 was prepared hydrothermally from magnesium acetate and basic aluminium nitrate. The obtained sample was characterised by XRD, HRTEM and nitrogen adsorption. The basic sites density was determined by temperature-programmed desorption of CO2 combined with mass spectrometry (TPD-MS). Moreover, test reactions for acid-base characterisation (i.e. 2-propanol and cyclohexanol transformations) were used. The prepared catalyst proved to be selective and active for monoalkylation of imidazole leading to 1-methylimidazole. The gas phase catalytic alkylation of imidazole with methanol on Mg,Al-mixed oxide catalyst was carried out in a continuous process at atmospheric pressure in the temperature range of 225-350 °C. 1-Methylimidazole was efficiently obtained with selectivity reaching up to 97.4% at an imidazole conversion of 93.0% (at temperature 340 °C).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Catalysis A: General - Volume 292, 18 September 2005, Pages 208-214
نویسندگان
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