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:
May. 16, 2006
Filed:
Jun. 06, 2002
Applicants:
Tjay Tjien Tjioe, Sittard, NL;
Henricus Antonius Maria Duisters, Budel, NL;
Inventors:
Tjay Tjien Tjioe, Sittard, NL;
Henricus Antonius Maria Duisters, Budel, NL;
Assignee:
DSM IP Assets B.V., Heerlen, NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D 251/60 (2006.01);
U.S. Cl.
CPC ...
Abstract
The invention relates to a method for contacting molten urea with a gas stream that contains ammonia and/or carbon dioxide, in which use is made of an additional stream the temperature of which differs from the temperature of the molten urea and/or the gas stream. The additional stream preferably contains ammonia. The method is preferably part of a process for the preparation of melamine.