Process for producing metal cyanates

Claim 1

A PROCESS FOR PRODUCING ALKALI METAL CYANATES COMPRISING INTRODUCING INTO THE DRUM OF A ROTARY MILL CONTAINING A PLURALITY OF INERT METAL POLYHEDRAL-SHAPED PARTICLES A RAW MIXTURE OF ALKALI METAL CARBONATE WITH A COMPOUND SELECTED FROM THE GROUP CONSISTING OF UREA AND THIOUREA IN MOLAR PROPORTIONS RANGING FROM 1.8 TO 3.0 OF SAID COMPOUND TO SAID CARBONATE, ROTATING SAID DRUM TO AGIATE SAID MIXTURE, SIMULTANEOUSLY HEATING SAID DRUM TO A TEMPERATURE NO GREATER THAN 300*C. TO REACT SAID MIXTURE MAINTAINING THE REACTING MIXTURE AT SAID TEMPERATURE FOR A PERIOD OF ABOUT FOUR TO FIVE HOURS, AND PASSING OFF THE VOLATILE COMPONETS EVOLVED FROM SAID REACTION AND DISCHARGING FINELY DIVIDED GROUND ALKALI METAL CYANATE FROM THE MILL.