5058

4755

كارشناسي ارشد

شيمي آلي

اصفهان: دانشگاه صنعتي اصفهان، دانشكده شيمي

1388

[ده]، 101ص: مصور، جدول، نمودار

ص.ع.به: فارسي و انگليسي

مهران غياثي

شادپور ملك پور

5/12/88

امير عبدالملكي، محمد قريشي

شيمي

ID4755

به فارسي و انگليسي: قابل رويت در نسخه ديجيتال

Nitration of phenol by immobilized ionic liquid on modified bentonit and kinetic study of reaction Hirbod karimi H karimi x@yahoo com November Department of chemistry Isfahan university of Technology Isfahan Iran Degree M Sc Language Farsi Porf M Ghiaci mghiaci@cc iut ac ir Abstract Nitration of organic compounds is one of the very important processes in the chemical industries and has long been a very active and rewarding area of research because nitroaromatic compounds are extensively utilized as chemical feedstocks for a wide range of useful materials In order to overcome difficulties and disadvantages such as low selectivity the requirement of large quantities of mineral a mixture of nitric acid and an excess of sulfuric acid or a stoichiometric amount of a Lewis acid such as boron triflouride as activators and eventual corrosion within the plant some reagents and catalysts have been applied by researchers for instance mixed metal oxide lanthanide reagents NaHSO H O Mg HSO and Oxone However the search still continues for newer and more efficient nitration protocols Room temperature ionic liquids captured the attention of the scientists because of their high ionic conductivity low vapor pressure thermal stability and wide electrochemical window that these compounds have become a novel solution to problems encountered with organic solvents Imidazolium based ionic liquids are commonly used given their easy manipulation and wide liquid range at room temperature when combined with different anions such as chloride The unique nitration of the Aromatic Compounds was examined on one type of Iranian clay Salafchegan under the nonpolare solvent conditions using cyclohexane For this propose clay was modified in some steps Then IL Butyl methylimidazolium chloride wa immobilized on Clay surface Our solid catalyst with different weight percents wt characterized by FT IR XRD SEM TEM Nitration by this catalyst caly IL had good conversion of starting materials and excellent slectivity Reaction conditions were optimized for nitration by varying temperature amount of catalysis and time conversion of Phenol with selectivity p nitrophenol was obtained The reaction did proceed in the absence of catalysis by conversion and selectivity p nitrophenol and o nitrophenol and negligible dinitrophenol Keywords phenol ionic liquid clay nitration PDF created with pdfFactory Pro trial version www pdffactory com

مهران غياثي

شادپور ملك پور

امير عبدالملكي، محمد قريشي