二苯胺甲烷磺酸盐催化合成乙酸环己酯

Synthesis of cyclohexyl acetate catalyzed by diphenylamine methylsulfonate

以二苯胺甲烷磺酸盐为催化剂,对乙酸与环己醇间的酯化反应进行了研究。考察了反应时间、催化剂用量、醇酸摩尔比和带水剂用量等对乙酸环己酯收率的影响。结果表明反应的较佳条件:当乙酸用量为0.1mol时,醇酸摩尔比为1.3,二苯胺甲烷磺酸盐用量为0.5g(约2mmol),带水剂环己烷用量8mL,反应30min后酯收率达96.4%,催化剂重复使用5次仍保持较高活性。产品经折射率、IR光谱进行了表征。

The esterification of acetic acid with cyclohexanol using diphenylamine methylsulfonate as the catalyst was studied.The effect of different factors such as reaction time, the dosage of catalyst, the ratio of acetic acid to cyclohexanol and the amount of water - carrying agent on the yield of cyclohexyl acetate were investigated. The experiment results show that the optimal reaction conditions are as follows, when the amount of acetic acid was 0.1 mol, the ratio of cyclohexanol to acetic acid was 1.3, the dosage of catalyst was 0.5 g （ about 2 mmol）, cyclohexane as the water - carrying agent was 8 mL,reaction for 30 min, the yield of cyclohexyl acetate reached 96.4 %. The catalyst keep high capability after reused for five times. The product was characterized by refractive index and IR.