固体超强酸SO_4^(2-)/TiO_2-Al_2O_3-SnO_2催化合成DBS

Synthesis of Dibutyl Sebacate with Sold Superacid SO_4^(2-)/TiO_2-Al_2O_3-SnO_2 as Catalyst

以固体超强酸SO42 -/TiO2 Al2 O3 SnO2 为催化剂、葵二酸和正丁醇为原料合成了癸二酸二丁酯 (DBS)。研究了反应时间、醇酸物质的量比、催化剂用量等对酯化率的影响。结果表明 :最佳反应条件为以 0 0 5mol葵二酸为基准 ,n (酸 )∶n (醇 ) =1∶4,催化剂 0 5g ,反应时间 3 5h ,此时酯化率达 97 5 % ,产品质量分数大于 98% ;催化剂重复使用 6次后 。

Dibutyl sebacate was synthesized from sebacic acid and n-butanol with SO 4 2- /TiO 2-Al 2O 3-SnO 2 as catalyst. The effects of reaction time, the molar ratio of alcohol to acid, and the content of catalyst on the synthesis were studied. The optimum reaction conditions were that based on 0.05 mol sebacic acid, n ( n-butanol): n (sebacic acid )=4, the content of SO 4 2- /TiO 2-Al 2O 3-SnO 2 was 0.5 g and the reaction time was 3.5 h. Under the optimum condition, the conversion of sebacic acid was 97.5%, the purity was over 98% , the activity of the catalyst changed little after 6 times of reuse.