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1.前言 在所有众多结构的杂多化合物中,至今为止,具有Keggin结构的杂多酸(盐)是研究得最充分、也是唯一商品化了的杂多化合物。近年来,有许多关于Keggin结构杂多化合物作为催化剂的研究结果和应用报道。这些催化反应许多是在液相中进行的。由于杂多化合物易受酸碱影响而使结构改变或破坏,因此,反应体系中的酸碱度对杂多化合物结构的稳定性和催化活性都有明显作用。所以,研究酸碱对杂多化合物结构和催化性能的影响具有重要意义。本文考察了12-钨磷酸(盐)在苄醇氧化反应中的催化活性以及酸碱对催化活性的影响。
1. Introduction Heteropolyacids (salts) with Keggin structure to date have been the most studied and unique commercially available heteropoly compounds among all heteropoly compounds of various structures. In recent years, there are many research results and application reports on the heteropoly compounds Keggin structure as a catalyst. Many of these catalytic reactions are carried out in the liquid phase. Since heteropoly compounds are susceptible to acid-base changes or destruction of the structure, the pH of the reaction system has a significant effect on the stability and catalytic activity of the heteropoly compound structure. Therefore, the study of acid-base on the structure and catalytic properties of heteropoly compounds is of great significance. This article examines the 12-tungstophosphoric acid (salt) in the oxidation of benzyl alcohol catalytic activity and acid-base on the catalytic activity.