| 一步催化合成二苯甲烷二氨基甲酸甲酯 |
| |
| 引用本文： | 刘丽敏,李芳,王延吉,赵新强.一步催化合成二苯甲烷二氨基甲酸甲酯[J].催化学报,2007,28(8):667-669. |
| |
| 作者姓名： | 刘丽敏 李芳 王延吉 赵新强 |
| |
| 作者单位： | 河北工业大学绿色化工与高效节能河北省重点实验室,天津,300130 |
| |
| 基金项目： | 国家重大基础研究前期研究专项(2005CCA06100)，国家自然科学基金(20476022). |
| |
| 摘 要： | 研究了以H4SiW12O40-ZrO2/SiO2为催化剂,碳酸二甲酯(DMC)、苯胺和甲醛溶液为原料,一步催化合成二苯甲烷二氨基甲酸甲酯(MDC)的反应,考察了反应时间、反应温度和H4SiW12O40负载量等反应条件对催化性能的影响.适宜的反应条件是:DMC/苯胺/甲醛摩尔比为20/1/0.05,H4SiW12O40负载量为10%,443 K下反应7 h后降温到373 K下反应4.5 h.在此优化条件下,MDC的收率为24.9%.
|
| 关 键 词： | 硅钨酸 氧化锆 双功能催化剂 二苯甲烷二氨基甲酸甲酯 一步合成 碳酸二甲酯 苯胺 甲醛溶液 |
| 文章编号： | 0253-9837（2007）08-0667-03 |
| 修稿时间： | 2007-02-09 |
One-Step Catalytic Synthesis of Methylene Diphenyl Dicarbamate |
| |
| LIU Limin,LI Fang,WANG Yanji,ZHAO Xinqiang.One-Step Catalytic Synthesis of Methylene Diphenyl Dicarbamate[J].Chinese Journal of Catalysis,2007,28(8):667-669. |
| |
| Authors: | LIU Limin LI Fang WANG Yanji ZHAO Xinqiang |
| |
| Institution: | Institute of Green Chemical Technology, Hebei University of Technology, Tianjin 300130, China |
| |
| Abstract: | Methylene diphenyl dicarbamate(MDC),an intermediate for the production of methylene diphenyl diisocyanate,was directly synthesized from dimethyl carbonate(DMC),aniline,and formaldehyde solution over the bifunctional H4SiW12O40-ZrO2/SiO2 catalyst.The effects of reaction time,reaction temperature,and H4SiW12O40 loading were studied.Suitable reaction conditions are as follows: DMC/aniline/formaldehyde molar ratio is 20/1/0.05,H4SiW12O40 loading is 10%,and reaction temperature is controlled by stages(i.e.,reaction at 443 K for 7 h and then at 373 K for 4.5 h).Under these conditions,the yield of MDC is 24.9%. |
| |
| Keywords: | silicotungstic acid zirconia bifunctional catalyst methylene diphenyl dicarbamate direct synthesis dimethyl carbonate aniline formaldehyde solution |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
