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:
Mar. 09, 2004
Filed:
Jun. 15, 2001
Giorgio Pagani, Lugano, CH;
Federico Zardi, Breganzona, CH;
Urea Casale S.A., Lugano-Besso, CH;
Abstract
A method for the modernization of a plant for urea production of the type comprising a reactor ( ) for urea synthesis, a stripping unit ( ) with carbon dioxide and at least one vertical condensation unit ( ) of the film type, foresees the provision of means ( ) for feeding a major portion of a flow comprising ammonia and carbon dioxide in vapor phase leaving the stripping unit ( ) to the condensation unit ( ) and the provision in said condensation unit ( ) of means ( ) for subjecting to substantially total condensation such major portion of the flow comprising ammonia and carbon dioxide in vapour phase, obtaining a flow comprising urea and carbamate in aqueous solution, then fed to the reactor ( ) for urea synthesis. Thanks to the present method of modernisation, the efficiency of the condensation unit ( ) is remarkably improved, thus permitting an increase of its capacity.