Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wyeth Holdings LLC
Original Assignee
American Cyanamid Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US401555Aexternal-prioritypatent/US3315442A/en
Application filed by American Cyanamid CofiledCriticalAmerican Cyanamid Co
Publication of ES305433A1publicationCriticalpatent/ES305433A1/en
Process for the purification of melamine from urea, characterized by introducing raw melamine gas containing ammonia, carbon dioxide and inert gases, this gas having a temperature of the order of 310 to 400 degrees centigrade, within a water area in which the gases are cooled and a melamine impurity is formed, this impurity being collected essentially as it has been formed and containing ammonia and carbon dioxide in the stated ratio of less than 5: 1. (Machine-translation by Google Translate, not legally binding)
ES0305433A1964-10-051964-10-29Procedure for the purification of melamine. (Machine-translation by Google Translate, not legally binding)
ExpiredES305433A1
(en)
Improvements introduced in the procedure of synthetizing urea from ammonia with gaseous carbon dioxide. (Machine-translation by Google Translate, not legally binding)
Procedure for the separation of ammonia produced in the medium and low pressure synthesis facilities. (Machine-translation by Google Translate, not legally binding)