阳离子掺杂水滑石的制备及其在合成异佛尔酮制备中的应用

Studies of Cation-Incorporated Hydrotalcites as Catalyst for Acetone condensation to Isophorone

并流共沉淀法制备水滑石及Li+、Ba2+、Ca2+掺杂的水滑石,将水滑石焙烧得复合氧化物.XRD结果表明掺杂的水滑石形成了类似水滑石的层状结构.FT-IR结果表明3种掺杂后的氧化物具有相似的结构及表面吸附性能.将所得的复合氧化物用于丙酮合成异佛尔酮的反应中,实验结果表明:与未掺杂的水滑石型复合氧化物相比,3种掺杂的水滑石复合氧化物在合成异佛尔酮的反应中均表现出良好的活性.

Mg-Al and cation-incorporated （containing Li ^＋ , Ba^2＋ , Ca^2＋ ） hydrotalcites were synthesized by coprecipitation. M/HTox mixed oxide were obtained by calcinaion of hydrotalcites. The samples were characterized by XRD and FT-IR. XRD results showed cation-incorporated samples had the same structure of the hydrotalcite. FT- IR results showed these samples had the same structure and surface property. These mixed oxides were used as catalysts in condensation of acetone to isophorone. Cation modified mixed oxide exhibit high catalytic activity compared with HTox. The Ca/HTox exhibit the best result with convention of 38.2% and the IP selectivity of 77.8%.