A simple work-up to prepare crystalline potassium exchanged zirconium hydrogen phosphate Zr(O3POK)(2) is proposed. In addition the synthesis of amorphous potassium exchanged zirconium hydrogen phosphate Zr(O3POK)(2), obtained from an amorphous sample of Zr(O3POH)(2).H2O is reported. All these exchanged materials Zr(O3POK)(2) are powerful catalysts for the Knoevenagel reaction. Furthermore the absence of solvent increases the rate of the reaction. Products can be separated from the catalyst by sublimation thus avoiding the use of solvent in the purification step. The catalyst, which is thus easily recovered, shows no appreciable loss of activity when recycled three times.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据