Process for treating furnace carbon black
Abstract
Abstract A PROCESS IS DESCRIBED FOR MAKING A FURNACE CARBON BLACK WHICH IS WELL SUITED FOR USE AS A REINFORCING FILLER IN RELATIVELY SATURATED SYNTHETIC ELASTOMERS. THIS PROCESS INVOLVES CONVERTING A HYDROCARBON RAW MATERIAL TO CARBON BLACK IN A FURNACE OPERATED SO AS TO PRODUCE A BLACK OF RELATIVELY LOW STRUCTURE AS INDICATED BY AN OIL ABSORPTION VALUE BELOW ABOUT 155 POUNDS OIL PER 100 POUNDS OF BLACK. THE RESULTANT BLACK IS THEN TREATED WITH A CHEMICAL OXIDIZING AGENT SELECTED FROM THE GROUP CONSISTING OF NITRIC ACID, NITROGEN OXIDES, OZONE AND MIXTURES THEREOF UNTIL THE PH OF SAID BLACK HAS BEEN REDUCED TO ABOUT 4 OR BELOW, THE VOLATILE CONTENT HAS BEEN INCREASED TO ABOUT 3% BY WEIGHT OR MORE AND THE DIPHENYL QUANIDINE UPTAKE FOR A HALF GRAM SAMPLE OF SAID BLACK HAS BEEN RAISED ABOVE ABOUT 25%.
Inventors
- 👤 Eli M Dannenberg
- 👤 Raymond P Rossman
- 👤 Bran B Boonstra
- 👤 Frank R Williams
Bibliographic Details
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