十聚钨酸季铵盐催化H2O2氧化异辛醇为异辛酸研究.pdf

十聚钨酸季铵盐催化H O 氧化异辛醇为异辛酸 2 2 郭明林，于 洺，周旭光 （天津工业大学材料化工学院，天津， 300160 ） 摘 要：氧化过程应该通过简单安全的操作，使用洁净、氧化性能优良并廉价的氧化剂，获取高产率、没有 副产物和高选择性产品。过氧化氢是一种理想的氧化剂，因为它的原子效率高并且水是唯一的理论副产物。 因此，近些年来使用过氧化氢作为氧化剂一直受到广泛的关注。当前有许多催化方法可用于醇的液相氧化， 其中基于含钨催化剂的催化方法特别对工业的应用具有吸引力。本文介绍一种使用过氧化氢作氧化剂完全无 卤无溶剂的氧化过程，即，使用十聚钨酸季铵盐H O 体系，在无任何有机溶剂的条件下，催化氧化异辛醇直 2 2 接合成异辛酸的反应，异辛醇的转化率为 32.6-69.2 % ，异辛酸的分离产率为23.2-61.3 % 。实验结果表明具有 较长碳链的十聚钨酸季铵盐催化剂能促使H O 的活性氧转移，把异辛醇氧化为异辛酸。 2 2 关键词：异辛醇； 异辛酸； 十聚钨酸； 季铵盐； 醇氧化； 2- 乙基己酸 Catalytic Oxidation of Isooctanol to Isooctanic Acid with Hydrogen Peroxide using Quaternary Ammonium Decatungstate Catalysts GUO Ming-lin, YU Ming, Zhou Xu-guang (School of Materials and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300160, China) Abstract: The oxidation procedure must be high-yielding and with high selectivity without any by-products through a simple, safe operation using a clean, well-behaving, and cheap oxidant. Aqueous hydrogen peroxide is an ideal oxidant, because the atom efficiency is excellent and water is a sole theoretical side product. Thus, in recent years, the use of hydrogen peroxide as oxidant has attracted considerable attention. Many of catalytic methods are currently available for the liquid-phase oxidation of alcohols with hydrogen peroxide. Among these, methods based on tungsten catalysts are particularly attractive for industrial use. We here disclose the no-solvent oxidation using aqueous hydrogen peroxide as oxidant under entirely halide-free conditions. That is, direct catalytic oxidation of isooctanol to isooctanic acid with hydrogen peroxide using some quaternary ammonium decatungstate as catalysts are performed with 23.2-61.3 % yields and