Controlling feedstock temperature in combustion process

Claim 1

IN A CARBON BLACK PROCESS COMPRISING CONDUCTING A STREAM OF HYDROCARBON CHARGING STOCK FROM A SOURCE THEREOF TO A PREHEATING ZONE, CONTINUOUSLY INTRODUCING THE RESULTING PREHEATED CHARGING STOCK INTO A REACTION ZONE ALONG WITH COMBUSTION GASES FOR THE INCOMPLETE COMBUSTION THEREOF, AND CONDUCTING THE RESULTING REACTION EFFLUENT TO CARBON BLACK RECOVERY EQUIPMENT, THE IMPROVEMENT COMPRISING THE STEPS OF CONDUCTING SAID PREHEATED CHARGING STOCK SO AS TO BYPASS SAID REACTION ZONE AND RECYCLING THE SAME TO SAID CHARGING STOCK SOURCE, CONDUCTING SAID PREHEATED CHARGING STOCK TO A COOLING ZONE RATHER THAN RECYCLING THE SAME DIRECTLY TO SAID SOURCE WHEN THE TEMPERATURE OF SAID STREAM OF CHARGING STOCK REACHES A PREDETERMINED VALUE, RECYCLING THE RESULTING COOLED PREHEATED CHARGING STOCK TO SAID SOURCE, AND RECYCLING AGAIN SAID PREHEATED CHARGING STOCK TO SAID SOURCE RATHER THAN CONDUCTING THE SAME TO SAID COOLING ZONE WHEN THE TEMPERATURE OF SAID STREAM OF CHARGING STOCK FALLS BELOW SAID PREDETERMINED VALUE.