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用合成的4种钴次卟啉衍生物作催化剂,在未加入辅助还原剂和其他溶剂的条件下催化空气氧化环己烷。反应温度150℃,釜压0.80 MPa,n(催化剂)∶n(底物)≈1∶4.63×105时,钴次卟啉衍生物表现出良好的催化性能。4种钴次卟啉衍生物催化的底物转化率在4 h内都达到了14%以上,目标产物环己酮和环己醇的选择性(简称酮醇选择性)在82%以上。其中,钴3,8-二硝基次卟啉二甲酯催化活性最好:环己烷转化率在3.5 h升至19.34%,环己烷氧化目标产物酮醇的选择性为82.30%,催化剂转化数达8.86×104。
The synthesized 4 kinds of cobalt porphyrin derivatives were used as catalysts to catalyze the air oxidation of cyclohexane without the addition of an auxiliary reductant and other solvents. The reaction temperature of 150 ℃, autoclave pressure of 0.80 MPa, n (catalyst): n (substrate) ≈ 1: 4.63 × 105, cobalt protoporphyrin derivatives showed good catalytic properties. The conversion rates of the substrates catalyzed by the four kinds of cobalt porphyrin derivatives reached more than 14% within 4 h. The selectivity of cyclohexanone and cyclohexanol (referred to as ketonic alcohol selectivity) of the target products was over 82%. Among them, the catalytic activity of dimethyl cobalt 3,8-dinitroporphyrinate was the best: the conversion of cyclohexane rose to 19.34% in 3.5 h, the selectivity to ketol in the target product of cyclohexane was 82.30%, the catalyst Conversion of up to 8.86 × 104.