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- W997243003 abstract "苯氨基甲酸甲酯(MPC)是非光气合成MDI的重要中间体,苯胺(AN)、尿素和甲醇一步合成MPC是一条绿色的反应工艺。首先考察了部分金属氧化物和Lewis酸对该反应的催化性能,发现经400℃焙烧2h的γ-A1203,催化活性最好。其次,确定了γ-A1203催化合成MPC的适宜反应条件:n(AN):n(γ-A1203):n(Urea):n(MeOH)=l:0.12:5:75,初压0.6MPa,反应温度180℃,反应时间2h。在此条件下,苯胺转化率为88.4%,MPC选择性为84.6%。在此基础上,考察了γ-A1203的催化稳定性,发现重复使用五次后,其催化性能没有明显的下降。最后,对γ-A1203的催化机理进行了研究,发现γ-A1203催化苯胺、尿素和甲醇一步合成MPC反应主要沿着以氨基甲酸甲酯为中间产物的路径进行。并据此提出了催化反应机理。" @default.
- W997243003 created "2016-06-24" @default.
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- W997243003 date "2013-01-01" @default.
- W997243003 modified "2023-09-23" @default.
- W997243003 title "γ-A1203催化苯胺、尿素和甲醇一步合成苯氨基甲酸甲酯反应" @default.
- W997243003 hasPublicationYear "2013" @default.
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