urea; compound with ammonia | 19848-49-8

• 英文名称: urea; compound with ammonia
• 英文别名: Harnstoff; Verbindung mit Ammoniak；amine urea；Ammonia urea；azane;urea
• CAS: 19848-49-8
• 化学式: CH₄N₂O*H₃N
• 分子量: 77.0861
• InChiKey: PPBAJDRXASKAGH-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -0.81
• 重原子数：
  5
• 可旋转键数：
  0
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.0
• 拓扑面积：
  70.1
• 氢给体数：
  3
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  urea; compound with ammonia 生成 氨
  参考文献：
  名称：

  Krustinsons, J., Zeitschrift fur Elektrochemie, 1938, vol. 44, p. 790 - 791

  摘要：

  DOI：
• 作为产物：
  描述：

  尿素 在 氨 作用下， 生成 urea; compound with ammonia
  参考文献：
  名称：

  Krustinsons, J., Zeitschrift fur Elektrochemie, 1938, vol. 44, p. 790 - 791

  摘要：

  DOI：

文献信息

• Integrated ammonia-urea process
  申请人：Snamprogetti S.p.A.

  公开号：US04235816A1

  公开（公告）日：1980-11-25

  An integrated ammonia-urea process is disclosed which uses as the starting gas mixture a stream coming, for example, from steam reforming of hydrocarbons, carbon dioxide being stripped from the stream by the action of a very concentrated ammonia solution (above 70% by wt) first and the the action of an ammoniated solution of ammonium carbonate secondly, a solution of ammonium carbamate being obtained together with a gas stream composed of nitrogen and hydrogen; sending the carbamate solution to the urea reactor, discharging from the urea reactor the urea solution containing unconverted carbamate and excess ammonia, decomposing said carbamate and sending evolved ammonia to the urea reactor again along with carbon dioxide, discharging the urea solution having now 50% of the original carbamate to an adiabatic stripper in which the stripping gas is essentially composed of hydrogen and nitrogen, removing ammonia and carbon dioxide with water from the adiabatic stripper and condensing ammonia and carbon dioxide by heat exchange, sending the stream of hydrogen and nitrogen to methanization and ammonia synthesis and concentrating the urea solution directly until obtaining a urea melt.

  本发明揭示了一种集成氨-尿素工艺，其使用起始气体混合物，该混合物来自于例如烃蒸汽重整，通过非常浓缩的氨溶液（重量分数超过70％）首先和氨基碳酸铵溶液的作用第二，得到氨基碳酸铵溶液和由氮气和氢气组成的气流；将碳酸铵溶液送入尿素反应器，从尿素反应器中排放含有未转化的碳酸铵和过量氨的尿素溶液，分解所述碳酸铵并将产生的氨气再次与二氧化碳一起发送到尿素反应器中，将现在含有原始碳酸铵50％的尿素溶液排放到绝热蒸馏器中，其中剥离气体基本上由氢气和氮气组成，从绝热蒸馏器中用水去除氨和二氧化碳并通过热交换冷凝氨和二氧化碳，将氢气和氮气的流送到甲烷化和氨合成，并直接浓缩尿素溶液，直到获得尿素熔体。
• Ephraim, F.; Ritter, W., Helvetica Chimica Acta, 1928, vol. 11, p. 848 - 864
  作者：Ephraim, F.、Ritter, W.

  DOI：——

  日期：——
• Kinetics of the Heterogeneous Ammoniation of Urea and Thiourea¹
  作者：George W. Watt、William R. McBride

  DOI：10.1021/ja01627a005

  日期：1955.11
• Gmelin Handbuch der Anorganischen Chemie, Gmelin Handbook: C: MVol.D1, 45.11.4, page 449 - 450
  作者：

  DOI：——

  日期：——