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固体超强酸ZrO2-SO42-催化合成核黄素四乙酸酯
Synthesis of Riboflavin Tetraacetate by Solid Superacid ZrO2 - SO42-
【摘要】 对固体超强酸ZrO2-SO42-催化合成核黄素四乙酸酯进行了研究。核黄素与乙酸酐摩尔比1:40,催化剂用量为反应物总质量的8.0%,反应温度80℃,反应时间2.5h,核黄素四乙酸酯产率可达76.9%。ZrO2SO4 ̄(2-)催化活性高于TiO2-SO42-和Fe2O3-,SO42-ZrO2在1mol/LH2 SO4中浸渍 24h,600℃焙烧 3h催化活性最高。
【Abstract】 The riboflavin tetraacetate was synthesized starting from riboflavin and acetic anhydride, and the solid superacid ZrO2- SO42- as catalyst. The yield of riboflavin tetraacetate reached up to 76. 9% by slowly adding 0. 01mol (3. 76g) riboflavin to 4g (8% of system loud mass) solid superacid ZrO2 - SO42- in 0. 4mol (40. 8g) acetic anhydride and stirring for 2. 5 hours at 80. The solid superacid catalyst ZrO2 - SO42- was synthesized by adding 4. 0g ZrO2 to 30ml 1mol/L H2SO4, immersing 24 hours at 30, baking 3 hours at 600.
【基金】 西安交通大学理科基础研究基金!(9707)
- 【文献出处】 精细化工 ,FINE CHEMICALS , 编辑部邮箱 ,1999年02期
- 【分类号】TQ466.2
- 【被引频次】8
- 【下载频次】69