کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9610491 | 47207 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Bis(o-phenanthroline)copper-catalysed oxidation of lignin model compounds for oxygen bleaching of pulp
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
کاتالیزور
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The selectivity of the water-soluble and highly active catalyst bis(o-phenanthroline)Cu in the oxygen bleaching of pulp was explored in model compound studies. The experiments were carried out under reaction conditions typical for industrial oxygen bleaching (90 °C, pH 12, p(O2) 8 bar). The generation of hydrogen peroxide was an essential step in the oxidation of the lignin model compounds, veratryl alcohol and 2,2â²-biphenol. Unfortunately, bis(o-phenanthroline)Cu also catalysed the depolymerisation of the carbohydrate model compound, dextran, both with oxygen and with hydrogen peroxide. The results explain well the inadequate selectivity of bis(o-phenanthroline)Cu in the oxygen bleaching of pulp.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Catalysis Today - Volume 100, Issues 3â4, 28 February 2005, Pages 237-242
Journal: Catalysis Today - Volume 100, Issues 3â4, 28 February 2005, Pages 237-242
نویسندگان
V.O. Sippola, A.O.I. Krause,