کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
52748 | 46885 | 2007 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Studies on heteropoly acid supported zirconia II. Liquid phase bromination of phenol and various organic substrates
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
کاتالیزور
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Studies on heteropoly acid supported zirconia II. Liquid phase bromination of phenol and various organic substrates Studies on heteropoly acid supported zirconia II. Liquid phase bromination of phenol and various organic substrates](/preview/png/52748.png)
چکیده انگلیسی
Heteropoly acid promoted zirconia sample were prepared by an incipient wetness impregnation method using different types of heteropoly acid. The liquid phase bromination of phenol was carried out using heteropoly acid supported zirconia as catalyst, KBr as brominating agent and hydrogen peroxide as an oxidant in acetic acid medium at room temperature. The reaction proceeds through the formation of Br+ (bromonium ion), which attacks the phenol ring forming different brominated products. Among all the HPAs loaded samples, phosphotungstic acid supported zirconia shows highest catalytic activity with 93% conversion and 81% para selectivity.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Catalysis Communications - Volume 8, Issue 6, June 2007, Pages 889–893
Journal: Catalysis Communications - Volume 8, Issue 6, June 2007, Pages 889–893
نویسندگان
Sujata Mallick, K.M. Parida,