高等学校化学学报 ›› 2004, Vol. 25 ›› Issue (5): 930.

• 研究论文 • 上一篇    下一篇

苯基脲与甲醇合成苯氨基甲酸甲酯的研究

王军威, 李其峰, 董文生, 亢茂青, 王心葵, 彭少逸   

  1. 中国科学院山西煤炭化学研究所, 太原 030001
  • 收稿日期:2003-03-12 出版日期:2004-05-24 发布日期:2004-05-24
  • 通讯作者: 王心葵(1943年出生),男,研究员,博士生导师,主要从事多相催化与高分子合成研究.E-mail:wangxk@sxicc.ac.cn E-mail:wangxk@sxicc.ac.cn
  • 基金资助:

    科技部重大项目前期预研专项项目(批准号:2001CCAO2700)资助

Synthesis of Methyl N-Phenyl Carbamate from Methanol and Phenyl Urea

WANG Jun-Wei, LI Qi-Feng, DONG Wen-Sheng, KANG Mao-Qing, WANG Xin-Kui, PENG Shao-Yi   

  1. Institute of Shanxi Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
  • Received:2003-03-12 Online:2004-05-24 Published:2004-05-24

摘要: 采用苯基脲与甲醇反应合成了苯氨基甲酸甲酯,考察了不同催化剂、原料配比及反应工艺条件的影响,确定了适宜的合成条件,并根据产物分布对催化反应机理进行了初步探讨.结果表明,以PbO为催化剂,于140℃反应4h后,苯基脲转化率为95.2%,苯氨基甲酸甲酯收率为80.6%.

关键词: 苯基脲, 甲醇, 苯氨基甲酸甲酯

Abstract: In this paper, methyl N-phenyl carbamate(MPC) was firstly synthesized from methanol and phenyl urea. The effects of catalysts, including PbO, Pb3O4, Pb/SiO2, ZnCl2, FeCl3, Mo/HZSM-5 and Pb/HZSM-5, material ratio and reaction condition on the synthesis of MPC were investigated, and the optimum reaction conditions were obtained. It was found that PbO showed a higher catalytic activity and MPC selectivity than those of other catalysts. The selectivity of MPC decreased while the conversion of phenyl urea increased with the increase of reaction temperature. Prolonging the reaction time enhanced the conversion of phenyl urea while suppressed the formation of MPC. Higher methanol/phenyl urea molar ratio favored the formation of MPC. The conversion of phenyl urea and the yield of methyl N-phenyl carbamate were reached 95.2% and 80.6%, respectively, under the optimum reaction conditions at 140 ℃ after 4 h reaction. The reaction mechanism was discussed based on the distribution of products.

Key words: Phenyl urea, Methanol, Methyl N-phenyl carbamate

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