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. 04, 1977
Filed:
May. 13, 1975
Applicant:
Inventor:
Petrus J Kaasenbrood, Sittard, NL;
Assignee:
Stamicarbon B.V., Geleen, NL;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
2605 / ; 2323 / ;
Abstract
A process for urea manufacture is described wherein the molar ratio of unreacted NH.sub.3 to CO.sub.2 (including NH.sub.3 and CO.sub.2 in the form of ammonium carbamate) in the carbamate reaction liquid phase is between 2:1 and 3:1, and the same ratio in the liquid phase in the urea autoclave is maintained between 3:1 and 6:1, control of the process being achieved by analysis of the gas phase and maintaining the NH.sub.3 to CO.sub. 2 molar ratio therein between about 1:1 and 6:1, preferably between about 1.5:1 and 3.5:1, in both the carbamate reactor and the urea autoclave.