Method of preparing melamine from cyanamide and/or dicyandiamide
AssigneeSuddeutsche Kalkstickstoff-Werke Aktiengesellschaft
InventorsHorst Michaud, Gunter Ortenburger, Wilhelm Poschinger, Heinrich Rock, Josef Seeholzer
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Abstract
Melamine is prepared from cyanamide and/or dicyandiamide by contacting the cyanamide and/or dicyandiamide at approximately atmospheric pressure in an organic solvent at 100.degree. to 250.degree. C with at least one solvent selected from the group having the formulas ##STR1## wherein R.sub.1 and R.sub.2 are alkyl which may be joined together to form an alkylene ring, In the simultaneous presence of alkali hydroxide or alkaline earth hydroxide.
Claims14
Method of preparing melamine from at least one reactant selected from the group consisting of cyanamide and dicyandiamide by contacting said reactant at approximately atmospheric pressure in an organic solvent at 100.degree. to 250.degree. C, with at least one solvent selected from the group having the formulas ##STR4## wherein R.sub.1 and R.sub.2 are alkyl which may be joined together to form an alkylene ring,
- in the simultaneous presence of alkali metal hydroxide or alkaline earth hydroxide.
Dependencies are inferred from the claim text.