The invention is a process for economically recovering carbon black, tar, oil and fuel gas from used tires. Used tires are physically sliced and fragmented. The fragments are pyrolized in an oxygen-limited, hydrocarbon vapor at subatmospheric pressure while being refluxed with process tar condensate....http://www.google.de/patents/US4250158?utm_source=gb-gplus-sharePatent US4250158 - Process for recovering carbon black and hydrocarbons from used tires
