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摘要
以NiCl2·6H2O、NaH2PO4·2H2O、FeCl3·6H2O、低品级羟基磷灰石(HAP)为原料,采用浸渍法和离子交换法制备Ni2P/Fe-HAP催化剂,研究了其催化苯酚选择性加氢制备环己酮的反应活性和选择性。考察了反应温度、反应压力、反应时间、催化剂质量、活性组分负载量、镍磷物质的量的比、焙烧温度、Fe3+浓度对反应活性和选择性的影响,并通过正交实验筛选出最佳反应条件。结果表明,在反应温度为150℃、反应压力为0.5 MPa、反应时间为3.5 h、催化剂质量为0.3 g时,苯酚转化率为65.73%,环己酮选择性达85.47%。
Abstract
Ni2P/Fe-HAP catalysts are prepared by both impregnation method and ion exchange method with NiCl2·6H2O,NaH2PO4·2H2O,FeCl3·6H2O and low-grade HAP as raw materials.The catalytic activity and selectivity of the catalyst in the selective hydrogenation of phenol to make cyclohexanone are studied.The effects of reaction temperature,reaction pressure,reaction time,catalyst dosage,loading amount of active components,the mass ratio of nickel to phosphorus,calcination temperature and Fe3+ concentration on the reactivity and selectivity in phenol to cyclohexanone are investigated.The optimal reaction conditions are screened by orthogonal experiment.It is indicated that the conversion rate of phenol can reach 65.73% and the selectivity of cyclohexanone can achieve 85.47% when the reaction temperature maintains at 150℃,the reaction pressure is 0.5 MPa,the reaction time 3.5 h,and the catalyst dosage 0.3 g.
关键词
苯酚
/
催化剂
/
羟基磷灰石
/
环己酮
/
选择性加氢
Key words
phenol
/
catalyst
/
hydroxyapatite (HAP)
/
cyclohexanone
/
selective hydrogenation
Ni2P/Fe-HAP对苯酚选择性加氢制环己酮的催化性能研究[J].
现代化工, 2020, 40(10): 145-149 DOI:10.16606/j.cnki.issn0253-4320.2020.10.030