Fe^(3+)的还原对丙烯腈催化剂活性的影响  

EFFECT OF THE REDUCTION OF Fe^(3+) ON THE ACTIVITY OF ACRYLONITRILE CATALYST

作　　者：姜家乐[1] 范永华[2] 杨斌[1] 朱正[2] 

机构地区：[1]中国石化上海石油化工研究院,上海201208 [2]中国石化上海石化股份有限公司

出　　处：《石油炼制与化工》2010年第11期27-31,共5页Petroleum Processing and Petrochemicals

摘　　要：针对某企业丙烯睛装置催化剂活性下降的问题,通过XRD、IR和化学分析等研究,发现丙烯腈催化剂的重要组成元素Fe^(3+)在使用过程中被过度还原及催化剂结构变化是造成催化剂性能下降的主要原因。应用催化剂器外再生技术再生后,丙烯腈收率显著提高。实验室评价结果表明,丙烯腈收率由再生前的76.11%提高到81.62%,提高了约5个百分点;通过部分再生剂置换工业装置反应器床层催化剂,丙烯腈收率由部分再生剂置换前的75.01%提高到78.82%,提高了3.81个百分点,取得了很好的技术效果。XRD, IR and chemical analysis were applied to the investigation of a decline in catalyst activity of an acrylonitrile unit. It was found that an exceeding reduction of the key element Fe^3＋ in acrylonitrile catalyst and the changes of catalyst structure during the process were the main causes of catalyst deactivation. Lab test results showed that the acrylonitrile yield could be increased significantly by applying ex-situ regeneration of the used catalyst, the acrylonitrile yield of catalyst prior and post to regeneration was 76.11% and 81.62%, respectively. In commercial unit, adopting partial substitution of used catalyst by regenerated catalyst, the acrylonitrile yield of catalyst prior and post to partial substitution was 75.01% and 78.82%, respectively, which indicated that a 3.81 percentages increase of yield was obtained.

关 键 词：丙烯腈 氨氧化 催化剂 还原率 再生 

分 类 号：TQ226.61[化学工程—有机化工]