Patent ID: 8114990

Claim:
A process for drying a melamine wet cake, comprising the steps of: providing a turbo-dryer comprising a cylindrical tubular body having a heating jacket, inlets and outlets and a bladed rotor rotatably supported therein, feeding a continuous flow of said melamine wet cake into said turbo-dryer, the internal wall of which is maintained at a temperature of at least 220° C., feeding a continuous flow of a gas selected from air or nitrogen into said turbo dryer, subjecting said flow of said melamine wet cake to the mechanical action of said bladed rotor rotating at a speed of at least 200 rpm, with consequent centrifugation of said wet cake against said heated wall, thus causing the instantaneous evaporation of the water contained in the cake, and transport of the latter towards the outlet, continuously discharging, after an average residence time of less than 300 seconds, a flow of melamine crystals having a humidity content of less than 0.1%.