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
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Filing date
Publication date
Application filed by American Cyanamid CofiledCriticalAmerican Cyanamid Co
Priority to ES207260ApriorityCriticalpatent/ES207260A1/en
Publication of ES207260A1publicationCriticalpatent/ES207260A1/en
Low-Molecular Organic Synthesis Reactions Using Catalysts
(AREA)
Abstract
Process for the preparation of a nitrogen compound of the group consisting of cyanamide dicyandiamide and melamine characterized in that it comprises the heating of urea with a silica gel catalyst at a temperature of 275º to 650º c. At essentially atmospheric pressure. (Machine-translation by Google Translate, not legally binding)
ES207260A1953-01-151953-01-15Procedure for the preparation of a nitrogen compound (Machine-translation by Google Translate, not legally binding)
ExpiredES207260A1
(en)
Procedure for the preparation of N- (2-amino-3,5-dibromobenciliden) -trans-4-amino-ciclohexanol. (Machine-translation by Google Translate, not legally binding)
A procedure for the obtaining of melamine from urea and its products of thermal decomposition (Machine-translation by Google Translate, not legally binding)
A procedure for the obtaining of melamine from urea and/or its thermal dissociation products through a treatment of heat or pressure and heat of the starting material in the presence of ammonia and a catalyst (Machine-translation by Google Translate, not legally binding)
A procedure for the polycondensation of acid amidas alquiliden-alquiliden and aralquiliden-bis-halºgenocarboxºlico (Machine-translation by Google Translate, not legally binding)