| 用苯胺和甲醇在β沸石催化剂上合成N,N-二甲基苯胺 |
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| 引用本文： | 李国弢,关乃佳,张怀彬,刘述全.用苯胺和甲醇在β沸石催化剂上合成N,N-二甲基苯胺[J].石油化工,2002,31(2). |
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| 作者姓名： | 李国弢 关乃佳 张怀彬 刘述全 |
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| 作者单位： | 1. 南开大学化学系,天津,300071
2. 南开大学催化剂厂,天津,300071 |
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| 摘 要： | 对苯胺和甲醇在β沸石催化剂上合成N ,N -二甲基苯胺 (N ,N -DMA)进行了研究。考察了反应温度、液态进料空速对催化剂活性和选择性的影响 ,对催化剂进行了 80 0h的寿命实验。实验证明 ,在n(苯胺 ) /n(甲醇 ) =1/3时 ,反应的最佳反应温度 2 40～ 2 5 0℃ ,最佳进料空速 0 5h- 1 。在 80 0h寿命实验过程中 ,苯胺的单程转化率达 99%(平均值 )以上 ,N ,N -DMA的选择性在 86 %以上 ,N -甲基苯胺 (N -MA)与N ,N -DMA的选择性在 95 %以上
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| 关 键 词： | β分子筛 苯胺 N-甲基化 C-甲基化 N N-DMA |
Synthesis of N,N-Dimethylaniline by Aniline and Methanol over β Zeolite Catalyst |
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| LI Guo-tao ,GUAN Nai-jia ,ZHANG Huai-bin ,LIU Shu-quan.Synthesis of N,N-Dimethylaniline by Aniline and Methanol over β Zeolite Catalyst[J].Petrochemical Technology,2002,31(2). |
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| Authors: | LI Guo-tao GUAN Nai-jia ZHANG Huai-bin LIU Shu-quan |
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| Affiliation: | LI Guo-tao 1,GUAN Nai-jia 1,ZHANG Huai-bin 1,LIU Shu-quan 2 |
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| Abstract: | Synthesis of N,N -dimethylaniline ( N,N -DMA)by aniline and methanol over β zeolite molecular sieves has been studied.The activity and selectivity of catalyst was investigated by varying reaction temperature and WHSV,and by a 800-hour life experiment.It is proved that the best reaction conditions are: reaction temperature 240～250 ℃ and feed rate 0 5 h -1 with aniline / methanol mol ratio = 1/3.During the life experiment the conversion of aniline is above 99% in average,and the selectivity of N,N -DMA is above 86%,while the selectivity of N -methylaniline and N,N -DMA is above 95%. |
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| Keywords: | zeolite aniline N -methylation C -methylation N N -dimethylaniline |
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