苯甲腈体系下环己酮绿色Baeyer-Villiger氧化合成ε-己内酯金属氧化物催化剂的催化性能研究
高妍 , 靳海波 , 杨索和 , 王陇豫 , 谷庆阳 , 何广湘 , 马磊
现代化工 ›› 2026, Vol. 46 ›› Issue (7) : 133 -139.
苯甲腈体系下环己酮绿色Baeyer-Villiger氧化合成ε-己内酯金属氧化物催化剂的催化性能研究
Investigation into catalytic performance of metal oxide catalysts in green Baeyer-Villiger oxidation of cyclohexanone to ε-caprolactone within the benzonitrile system
通过共沉淀法制备了MgO催化剂,并应用于催化环己酮绿色Baeyer-Villiger(B-V)氧化合成ε-己内酯。通过对催化剂前驱体的沉淀条件、前驱体焙烧时间以及前驱体焙烧温度与反应条件对环己酮转化率、己内酯选择性和收率的影响规律进行考察,并结合X射线衍射(XRD)、扫描电镜(SEM)、比表面积(BET)对催化剂进行了表征。同时,系统考察了溶剂种类对反应性能的影响,发现苯甲腈作为溶剂相较于乙腈具有更高的选择性。研究结果表明,制备催化剂前驱体的pH、前驱体焙烧时间和焙烧温度对催化剂催化性能影响较大,控制沉淀液pH在11、前驱体焙烧时间为2 h、焙烧温度为600℃时,可制得颗粒均匀、孔径适宜的MgO催化剂,其催化环己酮氧化合成ε-己内酯反应具有良好的反应活性。
MgO catalysts were synthesized via the co-precipitation method and subsequently employed in the green Baeyer-Villiger (B-V) oxidation of cyclohexanone to ε-caprolactone.The effects of the precipitation conditions of the catalyst precursor,precursor calcination time,precursor calcination temperature and reaction conditions on the conversion of cyclohexanone,as well as the selectivity and yield of caprolactone were investigated.The prepared catalysts were characterized by means of X-ray diffraction (XRD),scanning electron microscopy (SEM) and Brunauer-Emmett-Teller (BET) specific surface area measurement.Moreover,a systematic study was conducted to evaluate the effects of different solvents on the reaction performance.It was found that benzonitrile,when used as a solvent,exhibited a higher selectivity compared to acetonitrile.The experimental results indicated that the pH value of the precipitating solution,the calcination time,and temperature of the precursor had a profound influence on the catalytic performance of the MgO catalysts.Specifically,when the pH of the precipitating solution was maintained at 11,the precursor was calcined for 2 h at a temperature of 600℃,an MgO catalyst with uniformly distributed particles and an appropriate pore size was successfully obtained.This catalyst demonstrated excellent catalytic activity in the oxidation of cyclohexanone to ε-caprolactone.
环己酮 / 己内酯 / 苯甲腈 / Baeyer-Villiger氧化
cyclohexanone / caprolactone / benzonitrile / Baeyer-Villiger oxidation
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国家自然科学基金项目(22378026)
北京市属高校创新团队及教师职业发展项目(IDHT20180508)
北京市属高校分类发展项目(11000023T000002199202)
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