复合固体超强酸S_2O_8^(2-)/NiFe_2O_4的制备及催化性能的研究  

The Preparation and Catalytic Activity of Composite Solid Superacid S_2O_8^(2-)/NiFe_2O_4

作　　者：胡逢恺[1] 

机构地区：[1]黄山学院化学系,安徽黄山245041

出　　处：《化工时刊》2006年第9期4-6,共3页Chemical Industry Times

摘　　要：采用共沉淀法和浸渍法制备了S2O82-/NiFe2O4复合固体超强酸催化剂,并以乙酸和乙醇为原料合成了乙酸乙酯,考察了Fe∶Ni的原子配比,焙烧温度,焙烧时间,浸渍液浓度等对催化剂催化性能的影响。结果表明:当Fe∶Ni原子比为2∶1,焙烧温度为500℃,焙烧时间为5 h,浸渍液浓度为0.5 mol/L时,催化活性最好,酯化率可达83.50%,重复使用5次以上酯化率仍不低于80.0%。该工艺产率高,腐蚀性及污染性小,催化剂可回收、活化、重复使用。The composite solid superacid catalyst S2O8^2-/NiFe2O4 was prepared by means of precipitation and maceration, and the acetic ether was synthesized with the ingrediens of acetic acid and ethyl alcohol. The effects of Fe： Ni atomic ratio, the baking temperature and hours, and macerating extract density on the catalytic activity were determined. The experiments showed that under the conditions of Fe ： Ni atomic ratio of 2 ： 1, the baking temperature of 500 ℃, and the macerating extract density of 0.5 m, the catalytic activity reached its best level, with an esterification rate of 83.5 %, which remains above 80 % after repeated uses for over 5 times. This technique is highly effecient, lowly erosive or contaminating and the catalyst is recyclable, activatable and reusable.

关 键 词：S2O8^2-/NiFe2O4 复合固体超强酸 制备 催化剂 

分 类 号：O643.36[理学—物理化学]