异丁醛一步氧化制甲基丙烯酸的杂多酸盐催化剂的氧化还原性

REDOX PROPERTIES OF HETEROPOLY COMPOUNDS FOR ONE STEP OXIDATION OF ISOBUTYRALDEHYDE TO METHACRYLIC ACID

异丁醛一步氧化制甲基丙烯酸的杂多酸盐催化剂的氧化还原性＊贾继飞吴通好＊＊于剑锋王国甲杨宏茂姜玉子郑莹光（吉林大学化学系，长春１３００２３）关键词异丁醛，一步氧化，甲基丙烯酸，杂多钼磷酸盐，氧化还原性异丁醛（ＩＢＡＬ）一步氧化制甲基丙烯酸（ＭＡＡ）是最...

Molybdophosphoric acid with Keggin structure is an effective catalyst for oxidative reactions. As the central atom, coordinated atom and equilibrium ion in the molybdophosphoric acid are displaced in a suitable manner, it exhibits increasing catalytic activity although the structure of the anion keeps unchanged. In this paper a series of heteropoly compounds, A 1.5 P 1.13 Mo 12 Sb 0.25 Cu 0.25 V 0.25 As 0.20 O x (A=Li, Na, K, Rb, Cs), were synthesized by a coprecipitation method. The redox properties of heteropoly compounds were systematically characterized by means of ESR, FTIR etc . The effects of alkali and transition metals on redox properties of the heteropoly compounds were discussed. The redox capacity of transition metals Cu, V, Mo in the heteropoly compounds was compared. The catalytic performance of the heteropoly compounds for one step oxidation of isobutyraldehyde to methacrylic acid was measured as well. The relation between the redox property and the catalytic performance was discussed too.