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:
Jan. 29, 2002
Filed:
Jun. 24, 1997
Applicant:
Inventors:
Giorgio Pagani, Lugano, CH;
Umberto Zardi, Breganzona, CH;
Assignee:
Urea Casale, Lugano-Besso, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
C07C / ;
Abstract
In a process for the production of urea, substantially pure ammonia and carbon dioxide are reacted in a reaction space ( ) from which comes out a reaction mixture subjected to stripping ( ) to obtain a partially purified mixture sent to a urea recovery section ( ). From the recovery section ( ) it is obtained a dilute carbamate solution, which is subjected to stripping ( ) with recycling of vapors to the reaction space ( ) after condensation ( ). This process achieves high conversion yield with reduced energy consumption and low implementation costs.