Method for increasing purity in melamine

Details Method for increasing purity in melamine Method for increasing purity in melamine

C - Chemistry, Metallurgy

07

D

C07D 251/62 (2006.01)

Patent

CA 2177520

A method of purifying melamine produced from urea in a high-pressure, non-catalytic, non-aqueous process is described. In the method impure melamine is heated to a temperature of from about 250° to about 1000°F under a pressure from about 600 to 3000 psi in the presence of ammonia to provide melamine having a purity of 99.0% or above. The method is economical since chemical treatment and recrystallization steps are not required.

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