Process for the preparation of cyanuric

Claim 1

IN A PROCESS FOR THE PREPARATION OF CYANURIC CHLORIDE BY PASSING CYANOGEN CHLORIDE IN A VAPOR PHASE AT A TEMPERATURE OF ABOVE 200*C. OVER AN ACTIVATED CARBON WHICH HAS BEEN TREATED WITH AGENTS SELECTED FROM THE GROUP CONSISTING OF ACIDS, ALKALIS AND MIXTURES THEREOF AND WASHING WITH DISTILLED WATER UNTIL THE OXIDES, HYDROXIDES AND SALTS OF THE METALS OF LITHIUM, MAGNESIUM, CERIUM, TITANIUM, VANADIUM, MANGANESE, IRON, NICKEL, PLATINUM, COPPER, ZINC, CADMIUM, TIN, LEAD OR BISMUTH CONTAINED THEREIN ARE REMOVED THEREFROM AND A SPECIFIC INNER SURFACE OF AT LEAST 1000 SQUARE METERS PER GRAM IS ACHIEVED THEREIN, THE IMPROVEMENT WHICH COMPRISES ADDING TO THE CYANOGEN CHORIDE ADMIXED WITH IMPURITIES SELECTED FROM THE GROUP CONSISTING OF HYDROCYANIC ACID, CYANOGEN, HYDROGEN CHLORIDE AND MIXTURES THEREOF MORE THAN 0.5% AND UP TO 10% BY WEIGHT BASED ON SAID CYANOGEN CHLORIDE OF AN AGENT SELECTED FROM THE GROUP CONSISTING OF CHLORINE AND JPHOSGENE TO PROLONG THE LIFE OF SAID ACTIVATED CARBON PROVIDED THAT LESSER AMOUNTS OF SUCH IMPURITIES ARE PRESENT THAN OF SAID AGENT AND RECOVERING CYANURIC CHLORIDE AS PURE MATERIAL WITHOUT SUBSEQUENT PURIFICATION.