|کد مقاله||کد نشریه||سال انتشار||مقاله انگلیسی||ترجمه فارسی||نسخه تمام متن|
|1254151||971349||2014||4 صفحه PDF||سفارش دهید||دانلود رایگان|
Diethyl carbonate has been synthesized via the alcoholysis of ethyl carbamate in supercritical ethanol under catalyst-free conditions. The influences of various parameters such as reaction temperature, reaction time, reaction pressure, ethanol/ethyl molar ratios and reaction loading volume on the yield of DEC were studied systematically. The experimental results indicated that the alcoholysis of ethyl carbamate was greatly improved in supercritical ethanol. The optimal reaction conditions were as follows: a reaction temperature of 573 K, a reaction time of 30 min, a reaction pressure of 13.2 MPa, an ethanol/ethyl carbamate molar ratio of 10 and a reactor loading volume of 285 μL respectively. The optimal yield of DEC was 22.9%.
The synthesis of diethyl carbonate from ethyl carbamate was achieved for the first time in supercritical ethanol without any catalyst under the following conditions: a reaction temperature of 573 K, a reaction time of 30 min, a reaction pressure of 13.2 MPa, an ethanol/EC molar ratio of 10, a reactor loading of 285 μL.Figure optionsDownload as PowerPoint slide
Journal: Chinese Chemical Letters - Volume 25, Issue 10, October 2014, Pages 1395–1398