کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
226746 | 464802 | 2015 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Efficient and selective nitration of xylenes over MoO3/SiO2 supported phosphoric acid
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Efficient and selective nitration of xylenes over MoO3/SiO2 supported phosphoric acid Efficient and selective nitration of xylenes over MoO3/SiO2 supported phosphoric acid](/preview/png/226746.png)
چکیده انگلیسی
Silica supported molybdenum oxide modified with phosphoric acid (P/Mo/SiO2) is a very active solid acid catalyst in ortho-xylene nitration. At room temperature and with a small excess of fuming nitric acid, ortho-xylene conversion is 79 wt%. In nitration with 65% HNO3 at 80 °C and with fivefold molar excess of acid, almost complete ortho-xylene conversion is achieved. The P/Mo/SiO2 is also an excellent catalyst for nitration in the continuous process with using 65% HNO3 under solventless conditions. Hence, the process is eco-friendly, cheaper and leads to 60 wt% of selectivity to 4-nitro-ortho-xylene with ca. 90 wt% conversion for long time.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Industrial and Engineering Chemistry - Volume 27, 25 July 2015, Pages 175–181
Journal: Journal of Industrial and Engineering Chemistry - Volume 27, 25 July 2015, Pages 175–181
نویسندگان
Joanna Adamiak, Michał Chmielarek,