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:
Dec. 01, 2015
Filed:
Jan. 09, 2013
Applicant:
Saipem S.p.a., San Donato Milanese, IT;
Inventors:
Lino Carlessi, Bergamo, IT;
Alessandro Gianazza, Milan, IT;
Assignee:
SAIPEM S.p.A., San Donato Milanese, IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 273/04 (2006.01); B01D 3/00 (2006.01);
U.S. Cl.
CPC ...
C07C 273/04 (2013.01); B01D 3/009 (2013.01);
Abstract
A process for the direct synthesis of urea from ammonia and carbon dioxide with increased corrosion resistance, comprising, in the high-pressure synthesis section, a reaction step in a vertical reactor fed with at least one stream of fresh carbon dioxide containing a passivating agent and a decomposition-stripping step of the non-converted reagents, wherein the gas-liquid mixture collected at the head of the reactor is separated into a gaseous stream and a liquid stream fed to the tail and head of the stripper, respectively.