Tungstophosphoric acid and zirconia supported on mesoporous silica catalyst in veratrole acetylation

摘要：

Tungstophosphoric acid (TPA) over zirconia dispersed uniformly in mesoporous silica (MS) channels of MCM-41 and MCM-48 was synthesised and tested for its catalytic activity in veratrole acetylation. Catalysts with different TPA loadings (5 to 50 wt.％) on 22.4 wt.％ZrO2/MCM-41 and 15 wt.％TPA on different zirconia loadings (10-70 wt.％)/MCM-41 were prepared and calcined at 1123 K. Catalysts were characterised by known techniques. Mesoporous silica supports play an important role in stabilising catalytically active TPA along with tetragonal phase of zirconia. Among the catalysts, 15 wt.％TPA/22.4 wt.％ZrO2/MCM-41 calcined at 1123 K was found to have the highest acidity and be at least four times more active than neat 15 wt.％TPA/ZrO2 in veratrole acetylation to acetoveratrone by acetic anhydride.

作者: S. B. Halligudi

作者单位: Inorganic Chemistry and Catalysis Division, National Chemical Laboratory, Pune-411 008, India

会议类型: 国际会议

会议名称: 第15届国际分子筛大会

会议地点: 北京

会议语种:英文

在线出版日期: 2007-08-12（万方平台首次上网日期，不代表论文的发表时间）