反应萃取法合成戊二醛中H3PMoxW12—xO40的催化作用

杂多酸Ｈ３ＰＭｏｘＷ１２－ｘＯ４０是通过其适宜的酸性，氧化性的双功能的配合催化，使Ｈ２Ｏ２氧化环戊烯为戊二醛，液－液相转移反应萃取氧化过程是杂多酸与相转移催化剂形成油溶性配合物，此配合物在相界面被Ｈ２Ｏ２氧化为过氧化杂多酸配合物，过氧化杂多酸配合物在有机相可能机理是Ｈ２Ｏ２氧化杂多酸为过氧化杂多酸。

Catalysis of Heteropoly Acids (H 3PMo x W 12 x O 40 ) in Glutaraldehyde Synthesis by Phase Transfer Reative Extraction Process

Heteropoly acids, H 3PMo x W 12 x O 40 , catalyze the oxidation of cyclopentene to glutaraldehyde by the cooperation of their suitable acidity and oxidisability. The process of liquid liquid phase transfer reactive extraction is as follows: heteropoly acid complexes with phase transfer catalyst to form an oil soluble complex and the latter is oxidized by H 2O 2 to form a peroxocomplex on the aqueous organic interface; the peroxocomplex oxidizes cyclopentene to glutaraldehyde in organic phase; and the formed glutaraldehyde is then extracted by water into aqueous phase. In the reaction between H 2O 2 and cyclopentene catalyzed by heteropoly acid, the possible mechanism is: H 2O 2 oxidizes heteropoly acid to peroxo heteropoly acid; the peroxo heteropoly acid oxidizes cyclopentene to cyclopentene oxide (CPEO); and then CPEO is oxidized to glutaraldehyde by peroxoheteropoly acid via a series of intermediate steps. In this paper some oxidative intermediates are proposed.