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US 4,284,771 AGranted
Process for preparing melamine
AssigneeAmerican Cyanamid Company
InventorsHsuan L. Tien, Kenneth E. Olson
Life of this patent
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Abstract
There is provided a novel, economical process for preparing melamine from cyanogen and ammonia in the vapor phase and in the absence of dehydrogenation catalysts.
Claims7
A process for preparing melamine which consists essentially in:
- reacting cyanogen and ammonia at atmospheric pressure and at a temperature in the range from about 300.degree. C. to about 600.degree. C. in the presence of silica or alumina or silica- alumina and in the presence or absence of nitrogen.
Dependencies are inferred from the claim text.