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. 31, 2020
Filed:
Aug. 31, 2016
Applicant:
Toyo Engineering Corporation, Tokyo, JP;
Inventors:
Assignee:
TOYO ENGINEERING CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 273/04 (2006.01); C07C 273/16 (2006.01); B01J 19/00 (2006.01); B01D 3/00 (2006.01); B01D 5/00 (2006.01);
U.S. Cl.
CPC ...
C07C 273/04 (2013.01); B01D 3/009 (2013.01); B01D 5/009 (2013.01); B01D 5/0081 (2013.01); B01J 19/0053 (2013.01); C07C 273/16 (2013.01);
Abstract
Provided are urea manufacturing method and apparatus, which can increase the conversion ratio into urea and to reduce the consumption of steam. The temperature of the reactor is increased by introducing the entire amount of raw material ammonia and introducing a portion of the decomposed gas from the stripper into the reactor. The raw material ammonia is preferably heated using the steam condensate generated in the purification step, and/or the steam generated by the heat of condensation of the decomposed gas and the unreacted substances in the condensation step. The heating temperature is preferably between 70 and 140° C.