氧化锌固载四(4-羟基)苯基锰卟啉选择性催化氧化甲苯

Journal of Guangxi University(Natural Science Edition)(2011)

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Abstract
探索氧化锌固载四(4-羟基)苯基锰卟啉的催化性能。用混合溶剂法直接合成四(4-羟基)苯基卟啉(H2 THPP),采用研磨法合成四(4-羟基)苯基锰卟啉[Mn(Ⅲ)THPP]。将Mn(Ⅲ)THPP固载到新生成的氢氧化锌沉淀上,经烘焙制得氧化锌固载四(4-羟基)苯基锰卟啉催化剂。用紫外和红外光谱对它进行表征。研究固载催化剂[Mn(Ⅲ)THPP/ZnO],在无任何溶剂和还原剂的条件下,催化氧化甲苯的性能。结果表明:在最适合的180℃和0.5 MPa的反应条件下,用仅含2.7×10-6mol Mn(Ⅲ)THPP的固载催化剂就可以连续催化13次,甲苯的平均转化率可达7.28%,醛醇选择性可达60.5%,转化数为4.83×104,比未固载的Mn(Ⅲ)THPP催化效率强13倍。
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Key words
zinc oxide,toluene,oxidation,manganese tetra(4-hydroxylpheny1) porphyrin
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