Production of carbon black

Claim 1

IN THE KNOWN PROCESS OF REGULATING THE SURFACE AREA OF CARBON BLACK AS IT IS PRODUCED IN THE FURNACE PROCESS BY PREPARING SAID CARBON BLACK BY THE DECOMPOSITION OF HYDROCARBON FEEDSTOCK IN THE PRESENCE OF HOT COMBUSTION GASES AND AN ALKALINE EARTH METAL, THE IMPROVEMENT WHICH COMPRISES IN COMBINATION: CONDUCTING SAID DECOMPOSITION BY PROVIDING SAID HOT COMBUSTION GASES IN A FIRST ZONE INTO WHICH SAID FEEDSTOCK IS INJECTED, TURBULENTLY MIXING SAID FEEDSTOCK AND HOT COMBUSTION GASES AND INTRODUCING THEM INTO A SECOND ZONE THROUGH A RESTRICTION OR CHOKE OF LESSER CROSS-SECTION THAN EITHER OF SAID ZONES, INJECTING AN ALKALINE EARTH METAL SELECTED FROM THE GROUP CONSISTING OF CALCIUM, STRONTIUM AND MAGNESIUM AND MIXTURES THEREOF INTO THE RESULTANT TURBULENT REACTION MASS IN SAID SECOND ZONE, COOLING SAID REACTION MASS BELOW REACTION OR DISSOCIATION TEMPERATURE A SUBSTANTIAL DISTANCE DOWNSTREAM OF THE POINT OF INJECTION OF SAID ALKALINE EARTH METAL AND RECOVERING THE RESULTANT PRODUCT.