考察了几种负载PbO催化剂对苯胺(An)与碳酸二甲酯(DMC)反应合成苯氨基甲酸甲酯(MPC)的催化性能. 结果表明,PbO/SiO2对该反应表现出很高的催化活性. 当w(PbO)=3.6%,n(PbO)/n(An)=1%,n(DMC)/n(An)=5,θ=160 ℃和t=4 h时,MPC收率达到99.5%. PbO/SiO2容易从反应体系中分离,且可重复使用5次,催化活性基本保持不变,使用寿命较长.
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