Garcia Camila Martins, Teixeira Sergio, Marciniuk Letícia Ledo, Schuchardt Ulf
Instituto de Química, Universidade Estadual de Campinas, Caixa Postal 6154, 13084-862, Campinas, SP, Brazil.
Bioresour Technol. 2008 Sep;99(14):6608-13. doi: 10.1016/j.biortech.2007.09.092. Epub 2008 Feb 14.
Two sulfated zirconias were synthesized and characterized by X-ray diffraction and infrared spectroscopy. They were used as catalysts in the alcoholysis of soybean oil and in the esterification of oleic acid. Using sulfated zirconia prepared by the solvent-free method (S-ZrO(2)) as catalyst, the alcoholysis conversions of soybean oil under optimized conditions (120 degrees C, 1h and 5wt% of catalyst) were 98.6% (methanolysis) and 92% (ethanolysis), respectively. The esterification of oleic acid with methanol was complete after 2h. Zirconia sulfated by standard methods (SZ) had low activity in the methanolysis of soybean oil (conversion of 8.5%) and conventional zirconia (NS) was inactive for methanolysis under the conditions optimized for S-ZrO(2).
合成了两种硫酸化氧化锆，并通过X射线衍射和红外光谱对其进行了表征。它们被用作大豆油醇解和油酸酯化反应的催化剂。以无溶剂法制备的硫酸化氧化锆（S-ZrO(2)）为催化剂，在优化条件（120℃、1小时和5wt%的催化剂）下，大豆油的醇解转化率分别为98.6%（甲醇解）和92%（乙醇解）。油酸与甲醇的酯化反应在2小时后完成。标准方法硫酸化的氧化锆（SZ）在大豆油甲醇解中活性较低（转化率为8.5%），而传统氧化锆（NS）在针对S-ZrO(2)优化的条件下对甲醇解无活性。
