乙酰丙酮铬(Ⅲ)催化合成己酸环氧酯的影响因素及其动力学研究  

Influencing Factors for Synthesis of Epoxy Hexanoate Catalyzed with Acetylacetone Chromium(Ⅲ) and Its Kinetic Analysis

作　　者：郑炳发[1,2] 许林利[1,2] 朱林华[1,2] 许凯[1] 陈鸣才[1] 

机构地区：[1]中国科学院广州化学研究所,广东广州510650 [2]中国科学院研究生院,北京100039

出　　处：《精细化工》2010年第12期1244-1248,共5页Fine Chemicals

摘　　要：采用乙酰丙酮铬(Ⅲ)为催化剂,催化环氧树脂与己酸的加成酯化反应,探讨了反应温度和催化剂质量分数对酯化反应的影响,以及催化剂的活性,并研究了其动力学行为。实验结果表明,乙酰丙酮铬(Ⅲ)的催化能力高于叔胺和季铵盐催化剂,当其用量为原料总质量的0.4%时,于120℃反应200 min后酯化率可达86.2%。通过积分反应速率方程,对该反应的实验数据进行了动力学计算,确定乙酰丙酮铬(Ⅲ)催化环氧树脂与己酸的加成酯化反应级数为二级,反应表观活化能Ea为139.476 kJ/mol。用IR和1HNMR对产物进行了表征,证实合成了目标产物。The addition-esterification of epoxy resin and caproic acid catalyzed by acetylacetonate chromium（Ⅲ） was investigated.The effects of temperature and the catalyst mass fraction on the reaction were also investigated,and the catalytic ability was examined by comparing with tertiary amine and quaternary ammonium salt.The reaction product was characterized by FTIR and 1HNMR.The result showed that acetylacetonate chromium（Ⅲ） was a high-efficiency catalyst,with 0.4% of which the conversion of caproic acid could achieve 86.2% at 120 ℃ for 200 min.The reaction between epoxy resin and caproic acid was a second-order reaction,and the apparent activation energy（Ea） of the reaction was 139.476 kJ/mol by the kinetic calculation of the experimental data according to the integrated reaction rate equation.

关 键 词：环氧树脂 己酸 乙酰丙酮铬(Ⅲ) 加成酯化反应 反应动力学 精细化工中间体 

分 类 号：TQ320.2[化学工程—合成树脂塑料工业] TQ323.5