PREPARATION AND CHARACTERIZATION OF SULFONATED RICE HUSK ASH RHA-SO3H AS A GREEN, EFFICIENT AND REUSABLE CATALYST FOR THE ACETYLATION OF ALCOHOLS, PHENOLS AND AMINES
عنوان مقاله: PREPARATION AND CHARACTERIZATION OF SULFONATED RICE HUSK ASH RHA-SO3H AS A GREEN, EFFICIENT AND REUSABLE CATALYST FOR THE ACETYLATION OF ALCOHOLS, PHENOLS AND AMINES
شناسه ملی مقاله: NCNC01_221
منتشر شده در اولین همایش ملی فناوری های نوین در شیمی و مهندسی شیمی در سال 1392
شناسه ملی مقاله: NCNC01_221
منتشر شده در اولین همایش ملی فناوری های نوین در شیمی و مهندسی شیمی در سال 1392
مشخصات نویسندگان مقاله:
Farhad Shirini - Department of Chemistry, College of Sciences, Guilan University, Rasht, ۴۱۳۳۵-۱۹۱۴۱, Iran
Mohadeseh Seddighi
خلاصه مقاله:
Farhad Shirini - Department of Chemistry, College of Sciences, Guilan University, Rasht, ۴۱۳۳۵-۱۹۱۴۱, Iran
Mohadeseh Seddighi
Rice husk ash (RHA), as a source of amorphous silica, was treated with chlorosulfonic acid and sulfonated rice husk ash (RHA-SO3H) as a highlypowerful solid acid catalyst was obtained and characterized with a variety of techniques including IR, TGA, SEM, XRD, pH analysis, Hammett acidityfunction and BET method. This solid acid showed excellent catalytic activity for the protection and deprotection of aldehydes with Ac2O at room temperature under solvent free conditions. Theprocedure gave the products in excellent yields in very short reaction times and good to high yields.Also this catalyst can be reused for several times without loss of its catalytic activity.
صفحه اختصاصی مقاله و دریافت فایل کامل: https://civilica.com/doc/211918/