formaini

Claim 1

THE PROCESS FOR THE PRODUCTION OF CYANURIC ACID WHICH COMPRISES FIRST HEATING A BODY OF MOLTEN UREA AT ABOUT 135*C. TO 215*C. WHILE DISPERSING A STRIPPING GAS FOR AMMONIA WITHIN SAID MOLTEN UREA AND PASSING THE GAS THROUGH AND IN INTIMATE CONTACT WITH THE HEATED BODY, THEREBY REMOVING AMMONIA EVOLVED BY DECOMPOSITION OF THE UREA, CONTINUING SAID HEATING UNTIL AT LEAST ABOUT 50% OF THE UREA HAS BEEN DECOMPOSED, DISCONTINUING SAID HEATING BEFORE UNREACTED UREA IN SAID HEATED BODY IS DECREASED TO SUBSTANTIALLY BELOW 30% BY WEIGHT OF THE HEATED BODY AND THE RESULTING PRODUCT CEASES TO BE MOBILE WHEN HEATED TO A TEMPERATURE IN THE RANGE 135*C. TO ABOUT 215*C., THEREAFTER SPREADING THE RESULTING STRIPPED PRODUCT OF THE PARTIAL PYROLYSIS OF THE UREA AS A SHEET NO GREATER THAN ABOUT 0.5 INCH IN THICKNESS ON A HOT SURFACE AT A TEMPERATURE IN THE RANGE 200*C. TO 300*C. AND MAINTAINING IT IN CONTACT WITH SAID SURFACE AT SAID TEMPERATURE UNTIL THE UREA IS SUBSTANTIALLY COMPLETELY DECOMPOSED, THEREBY OBTAINING A PRODUCT PRINCIPALLY COMPOSED OF CYANURIC ACID.