کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
152569 456498 2009 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Modified-sorbents for acetone adsorption: Application in ethylene polymerization process
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Modified-sorbents for acetone adsorption: Application in ethylene polymerization process
چکیده انگلیسی

Ziegler-Natta catalysts are commonly employed in alfa-olefin (co)polymerization. Such systems are extremely sensitive to some organic compounds, which may act as poison, reducing polymer productivity. Among them, oxygenated compounds such as acetone can cause catalyst deactivation. In the present study, silica and chrysotile, in their pure form and after chemical modification with Cu and Ag, were characterized by a series of volumetric, spectroscopic and microscopic techniques. The results are discussed in terms of silanol group density, Lewis acid centers introduced by the metal and textural properties of the support. The resulting sorbents were evaluated in the adsorption of acetone from cyclohexane. Solvent containing acetone was percolated through the investigated sorbents and evaluated in the polymerization of ethylene using Ziegler-Natta catalysts. The best results in catalyst activity were observed in the case of silica or chrysotile modified with Cu.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Journal - Volume 147, Issues 2–3, 15 April 2009, Pages 383–390
نویسندگان
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