【摘要】 以浓硫酸为催化剂,研究了对羟基苯甲酸和异丙醇合成对羟基苯甲酸异丙酯的工艺条件。对影响产率的因素进行了探讨:实验表明,在以7%的浓硫酸为催化剂,反应温度为120℃,醇酸摩尔比为4∶1,反应时间为5h的最佳条件下,合成了羟基苯甲酸异丙脂,通过多次重结晶的方法纯化产品,产率可达85. 5%,并通过熔点仪、红外光谱等手段对产品加以表征,验证了产品具有较高的纯度。该法简单、快速、产率高、纯度好,具有较高的实用价值。更多还原

【Abstract】 This paper reports the conditions of synthesis process of isopropy p-hydroxybenzoate with p-hydroxybenzoic acid and isopropanol with thick sulfuric acid as the catalyst. The factors impacting the rate of products are studied, the result of the experiment demonstrates that, at the optimum conditions, the amount of thick sulfuric acid is 7%, the reaction temperature is 120 ℃, the molar ratio of alcohol and acid is 4∶1, the time of reaction are 5 hours, the yield of isopropy p-hydroxybenzoate refined by this method of repeat crystal reaches to 85.5%. The rapid reaction time and the high of the rate of product makes this method having high practical value.更多还原