| 韩云香,刘士民,王培学,邓友全.热分析法研究离子液体催化体系中氨基甲酸酯热裂解合成异氰酸酯[J].分子催化,2016,30(4):297-306 |
| 热分析法研究离子液体催化体系中氨基甲酸酯热裂解合成异氰酸酯 |
| Investigation of the Process for Isocyanate via the N-substituted Carbamate Thermal Decomposition in Ionic Liquid based Catalytic Systems by Thermal Analysis Techniques |
| 投稿时间：2016-04-15 修订日期：2016-05-03 |
| DOI： |
| 中文关键词: 异氰酸酯 离子液体 催化剂 热裂解 热重分析 |
| 英文关键词:Isocyanate Ionic liquid Catalyst Thermal cleavage Thermal gravity analysis |
| 基金项目:国家自然科学基金项目（面上项目，重点项目，重大项目） |
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| 中文摘要: |
| 采用热分析方法对离子液体催化体系中非光气法合成异氰酸酯过程，即氨基甲酸酯热裂解过程进行了系统评价。利用热重分析（TGA）快速简单的特点，对1,6-己二氨基甲酸甲酯（MHDC）热裂解过程的条件进行了优化，包括离子液体及催化剂类型筛选，催化剂用量，反应温度，反应时间等。同时，发展了Bi2O3/Fe2O3和HTixOy两种高活性催化剂，并对其进行了详细的表征。此外，合成的HTixOy催化剂不仅具有催化热裂解的作用，而且具有抑制副反应的作用。 |
| 英文摘要: |
| The non-phosgene process for isocyanates via the N-substituted carbamate thermal cleavage reaction in ionic liquid based catalytic systems was investigated detailedly in virtue of thermal analysis techniques. In particular, the reaction conditions for thermal decomposition of dimethyl hexamethylene-1,6-dicarbamate (MHDC) was optimized using the thermal gravity analysis (TGA), including the type of ionic liquids as well as catalyst, amount of catalyst, reaction temperature, reaction time, and so on. Meanwhile, two novel catalysts with high activity were developed, namely, Bi2O3/Fe2O3 and HTixOy, and a series of characterizations were also conducted. It is worth mentioning that the prepared HTixOy could not only effectively promote the thermal cleavage reaction, but also suppress the secondary reactions. |
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