Title:
A manufacturing method of urea
Document Type and Number:
Japanese Patent JP5945774
Kind Code:
B2
Abstract:
A method of producing urea includes reacting SiO2/Al2O3 or SiO2/Al2O3-containing material, with addition of a carbon source, with gaseous nitrogen at elevated temperature to produce silicon nitride (Si3N4)/aluminum nitride (AlN) or silicon nitride/aluminum nitride-containing material; reacting the silicon nitride/aluminum nitride or silicon nitride/aluminum nitride-containing material in the presence of a basic alkali metal compound and/or alkaline-earth metal compound, with water at elevated temperature, to produce ammonia and alkali metal silicates/aluminates and/or alkaline earth metal silicates/aluminates; and reacting the ammonia with carbon dioxide to produce the urea.
Inventors:
Norbert Aonor
Application Number:
JP2012554370A
Publication Date:
July 05, 2016
Filing Date:
February 28, 2011
Export Citation:
Assignee:
Spawnt Private S.a.r.l
International Classes:
C07C273/10
Domestic Patent References:
| JP40028091B1 |
Foreign References:
| GB199667B | ||||
| US20030165417 | ||||
| EP1452578A1 |
Other References:
LEHRBUCH DER ORGANISCHEN CHEMIE,1984年,P332
Attorney, Agent or Firm:
Koji Nagato
Hisayoshi Nagata
Hisayoshi Nagata