Reklaim Inc., Boardman, Ore., recycles scrap tires into recovered carbon black (RCB) and tire-derived oils. The central element of Reklaim’s operation is a pyrolysis, a thermal process by which hydrocarbon materials are thermally decomposed into constituent materials in an oxygen-free environment. Reklaim has a patent for pyrolysis of crumbed rubber with a vertical rotating tray dryer. The recovered carbon black then is pelletized and sold to manufacturers of rubber and plastic products. The tire-derived oils are sold to large industrial fuel blend organizations for such uses as fuel oil for industrial boilers.
During pyrolysis of shredded tires, the chemical bonds within the rubber compounds are broken, with the rubber temporarily converted to a high temperature hydrocarbon gas, thereby liberating the recycled carbon black from the tire. The gasified rubber stream is then cooled and condensed into oil and gas streams.