کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5210764 1382914 2009 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Phase transfer catalyzed heterogeneous N-deacetylation of chitin in alkaline solution
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Phase transfer catalyzed heterogeneous N-deacetylation of chitin in alkaline solution
چکیده انگلیسی
Chitin was extracted from shrimp shell waste and its heterogeneous alkaline deacetylation under phase transfer catalysis (PTC) condition was performed. The reaction followed the first-order kinetics during an initial period. The influences of type and concentration of phase transfer catalyst, type of organic solvent, alkaline concentration, temperature, time and volume of organic phase to the volume of aqueous phase ratio on the N-deacetylation were investigated. The degree of deacetylation (DD) increased mainly with increasing temperature, catalyst concentration and time. In the temperature range of 30-100 °C, the apparent rate constant and the activation energy of the reaction were evaluated in presence and in absence of PTC condition.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Reactive and Functional Polymers - Volume 69, Issue 6, June 2009, Pages 358-363
نویسندگان
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