The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 15, 2014
Filed:
May. 14, 2009
Applicant:
Giancarlo Sioli, Cernobbio, IT;
Inventor:
Giancarlo Sioli, Cernobbio, IT;
Assignee:
Urea Casale SA, , CH;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D 251/60 (2006.01); C07D 251/62 (2006.01);
U.S. Cl.
CPC ...
Abstract
A process for high-pressure, liquid phase conversion of urea into melamine is disclosed, where molten urea is fed to a first reaction zone (S) where the melamine melt is under mechanical agitation, and a heat input (Q) is provided to maintain the endothermic reaction, and the liquid is then passed to a second reaction zone (S) kept at a lower temperature and where further agitation is provided. Embodiments of plants adapted to carry out the process are also disclosed, including multiple stirred reactors in cascade and a single reactor with multiple internal compartments defining said first and second reaction zones.