《抗氧剂168的合成研究》-毕业论文.doc

抗氧剂168的合成研究 姓 名： 学????号： 摘? 要 如今亚磷酸酯类化合物已成为聚烯烃辅助抗氧剂的主要品种，发展势头强劲【1】。抗氧剂168是一种性能优异的亚磷酸酯抗氧剂，能防止塑料经过高温挤压成型时发生氧化降解作用，应用广泛。2，4-二叔丁基苯酚（简称2，4-酚）是合成抗氧剂168最重要的一种原料，多年来一直依赖进口【2】。我国亚磷酸酯类抗氧剂开发比较迟缓，目前国产产品质量和产量与国外同类产品相比还有很大差距。本论文设计了一系列合成实验，第一步以苯酚，叔丁醇为原料合成2，4-酚，第二步2，4-酚再与三氯化磷反应生成抗氧剂168，考察了反应温度，反应时间，原料比，催化剂种类及用量等对产率的影响，与文献资料符合较好。着重考察了催化剂fotp的催化性能效果理想。可以探索抗氧剂168的合成工艺。 【关键词】亚磷酸酯?? 抗氧剂168?? 2，4-二叔丁基苯酚?? 工艺流程 Abstract Today phosphite compounds have become supporting antioxidant species for polyolefin, and have a strong development momentum. Antioxidant 168{Tri(2,4-di-tert-butylphenyl)phosphite }is a performable phosphite antioxidant, and oxidative degradation of plastic can be prevented when extruded at high temperatures progresses. so，Antioxidant 168 has a wide range of applications. 2,4 - di-tert-butylphenol (referred to as 2,4 - phenol) is a most important raw materials for the synthesis of Antioxidant 168 and has been depend on imports. The development of China phosphite-type antioxidants was slow compared with the overseas. There is still a big gap between the current product quality and quantity of domestic and foreign analogue. In this paper, a series of synthesis experiments were designed. The first step：2,4 - Phenol was synthesized with phenol, tert-butyl alcohol. The second step ：Antioxidant 168 was synthesized with phosphorus trichloride and 2,4 – Phenol. The impact of the reaction temperature, reaction time, raw materials ratio, the type and amount of catalyst on the yield of synthesis experiments was studied. The result is better in line with the documentation. The catalytic properties of catalyst fotp was focused on importantly, and the result was perfect. The whole synthesis progress of Antioxidant 168 can be explored. 【key words】phosphite? Antioxidant 168? 2,4 - di-tert-butylphenol synthesis progr ess 目? 录 HYPERLINK /Doc?id=djbbm6j_4dvppdwnkbtr=EmailImport \l _Toc231613884#_Toc231613884 1文献综述????????????? 1 HYPERLINK /Doc?id=djbbm6j_4dvppdwnkbtr