二苯胺甲烷磺酸盐催化合成乙酸仲丁酯

以二苯胺甲烷磺酸盐为催化剂,对乙酸与仲丁醇之间的酯化反应进行了研究,考察了反应时间、催化剂用量、醇酸摩尔比等因素对乙酸仲丁酯酯化率的影响。实验结果表明,在最佳反应条件为:当乙酸的物质的量为0.1mol,醇酸摩尔比为1.4,二苯胺甲烷磺酸盐质量为0.8g(约3.2mmol),带水剂环己烷的体积为8mL,反应时间为45min,酯化率达95.7%,且所得产品无色透明,具有很高的纯度。催化剂重复使用5次仍保持较高活性。合成反应条件温和,反应时间较短,操作简便,后处理过程简单,无三废产生。同时,对产品的红外光谱进行了表征。

Synthesis of Sec- Butyl Acetate Catalyzed by Diphenylammonium Methanesulfonate

The esterification of acetic acid with sec-butanol catalyzed by diphenylammonium methanesulfonate was reported. The effect of different factors, such as reaction time, the amount of catalysts and the mole ratio of sec-butanol to acetic acid on the yield of sec-butyl acetate was carefully studied. The experimental results show that the best reaction conditions are as the followings: when the amount of acetic acid is 0.1 mol, the mole ratio of sec-butanol to acetic acid is 1.4,the mass of catalysts is 0.8 g (3.2 mmol), cyclohexane as the water-carrying agent is 8 mL. By reacting 45 min, the yield of sec-butyl acetate reaches 95.7%. The product is colorless and transparent. The catalyst keeps high capability after five times reusing. The process is of the mild reaction condition, short reaction time, easy manipulation, and no waste of three kinds produced in the after-treatment. The product was characterized by IR.