کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
40553 45858 2013 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Sulfated zirconia; an efficient and reusable acid catalyst for the selective synthesis of 4-phenyl-1,3-dioxane by Prins cyclization of styrene
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Sulfated zirconia; an efficient and reusable acid catalyst for the selective synthesis of 4-phenyl-1,3-dioxane by Prins cyclization of styrene
چکیده انگلیسی

Prins cyclization of styrene with paraformaldehyde was carried out over sulfated zirconia (SZ) catalyst in liquid phase. The SZ catalysts were synthesized by precipitation method with different sulfur impregnation and characterized by XRD, FT-IR, Nitrogen sorption, NH3-TPD. The SZ showed best performance among different types of acid catalysts. The acidity of SZ optimized by different concentrations of H2SO4 treatment influences the selectivity for dioxane. The sulfur loading, nature of solvent, temperature, catalyst amount, mole ratio and reusability of catalyst were investigated. The SZ catalyst synthesized by impregnating 2N sulfuric acid was found to be highly selective for the synthesis of 4-phenyl-1,3-dioxane (93%) with almost complete conversion of styrene (∼100%). The catalyst was recycled thrice with negligible decrease in the yield of 4-phenyl-1,3-dioxane.

Figure optionsDownload high-quality image (173 K)Download as PowerPoint slideHighlights
► Sulfated zirconia is an efficient catalyst for Prins cyclization of styrene with paraformaldehyde.
► Influence of sulfur content and acidity of sulfated zirconia catalyst on activity and selectivity.
► The efficiency of catalyst for Prins cyclization of different alkenes with paraformaldehyde.
► Understanding the solvent effect in terms of dielectric constant, acceptor and donor numbers.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Catalysis A: General - Volume 451, 31 January 2013, Pages 71–78
نویسندگان
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