二甘醇二苯甲酸酯的催化合成研究  

Study of catalyze synthesize diethylene glycol dibenzoate

作　　者：王广坤[1] 陈胜洲[1] 李淑妍[1] 

机构地区：[1]广州大学化学化工学院,广东广州510006

出　　处：《化学工程师》2014年第12期1-5,共5页Chemical Engineer

基　　金：国家自然科学基金(21376056)

摘　　要：以苯甲酸和二甘醇为原料,二(乙酰丙酮基)钛酸二丁酯为催化剂,通过酯化合成二甘醇二苯甲酸酯(DEDB),探索了增塑剂DEDB的最佳合成工艺条件,并通过FT-IR、核磁共振氢谱(1H-NMR)对合成产物进行了结构分析。研究结果表明:反应原料酸醇摩尔比为2∶1.1、带水剂用量为苯甲酸质量含量的18%、催化剂用量为苯甲酸质量含量的3.0%,反应温度为180℃,反应时间为5h,酯化率达到98.2%。Diethylene glycol dibenzoate was carried out with benzoic acid and diethylene glycol as raw mate-rial. The optimized reaction conditions were determined and the products were characterized by infrared spectrum and nuclear magnetic resonance, which proved the existence of characteristic absorption peaks of DEDB. The re-sults show that the optimized synthesis conditions of DEDB are as follows： n（benzoic acid）：n（diethylene glycol）=2.0：1.1, reaction temperature 180℃, reaction time 5h, the dosage of toluene18%（based on the mass of benzoic acid）, and the dosage of catalyst 0.8%（based on the mass of benzoic acid）. In this reaction conditions, reaction esterification is98.2%.

关 键 词：增塑剂 二甘醇二苯甲酸酯 钛系催化剂 

分 类 号：TQ414[化学工程]