Mn助剂对催化胺化制备四甲基乙二胺催化剂性能的影响  

Effect of Mn auxiliary on catalyst's performance for TMEDA preparation through catalytic amination reaction

作　　者：梁胜彪[1] 钱俊峰[2] 吴军[2] LIANG Sheng-biao QIAN Jun-feng WU Jun(Sinopec Maoming Petrochemical Company Limited, Maoming 525000, China Changzhou University, Changzhou 213164, China)

机构地区：[1]中国石油化工股份有限公司茂名分公司,广东茂名525000 [2]常州大学,江苏常州213164

出　　处：《现代化工》2017年第10期143-147,共5页Modern Chemical Industry

摘　　要：以Cu/Ni为主活性组分,γ-Al2O3球为载体,考察了Mn助剂对N,N-二甲基乙醇胺(DMEA)固定床连续催化胺化制备N,N,N',N'-四甲基乙二胺(TMEDA)催化剂性能的影响,并通过XRD、BET/BJH、H2-TPR、H2-TPD等对催化剂结构进行表征,结果表明,Mn能够抑制脱氢而促进加氢反应的发生,随着Mn含量的增加,选择性会提高,而活性相对会受到抑制,当n(Cu)∶n(Ni)∶n(Mn)=4∶1∶0.2时催化剂性能较佳。采用4Cu-1Ni-0.2Mn/γ-Al2O3球作为催化胺化催化剂,在反应温度为240℃,DMEA空速为0.15 h-1,胺醇摩尔比为1∶1,常压,氢速为30 m L/min时,DMEA转化率和TMEDA选择性分别达到92%和83%左右。With Cu/Ni as main active component,γ-Al2O3 as carrier,the effect of Mn auxiliary on the performance of the catalysts is investigated in the preparation of TMEDA by continuous catalytic amination of DMEA.The structure of catalysts is characterized by XRD,BET/BJH,H2-TPR,H2-TPD and so on. It is concluded that Mn auxiliary can inhibit dehydrogenation,but promote hydrogenation reaction. With the increase of Mn content,the selectivity of catalysts will increase while the activity will be inhibited. When n（Cu） ∶ n（Ni） ∶ n（Mn） = 4 ∶ 1 ∶ 0. 2,the catalytic performance is the best.The conversion and selectivity achieve around 92% and 83% respectively,when the reaction temperature is 240℃,DMEA space velocity is 0. 15 h^-1,the molar ratio of amine to alcohol is 1 ∶1,pressure is atmospheric,hydrogen velocity is30 mL·min^-1,and 4Cu-1Ni-0. 2Mn/γ-Al2O3 is used as catalyst.

关 键 词：N N-二甲基乙醇胺 N N N' N'-四甲基乙二胺 催化胺化 助剂 催化剂 

分 类 号：TQ032.4[化学工程]