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. 09, 2006
Filed:
Dec. 10, 2002
Applicant:
Gerhard Coufal, Leonding, AT;
Inventor:
Gerhard Coufal, Leonding, AT;
Assignee:
AMI - Agrolinz Melamine International GmbH, Linz, AU;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D 251/62 (2006.01); C07D 251/60 (2006.01);
U.S. Cl.
CPC ...
Abstract
The invention relates to a method for producing pure melamine in a high-pressure method. According to said method, in the first stage, the melamine melt is brought into contact with hot NHand NHfrom the second stage and in the second step is brought into contact with cold NHin such a way that it is cooled to a temperature, which is 1–30° C. above the pressure-dependent melting point of the melamine, before being optionally rested in a third stage and subsequently treated in various ways.