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| Number | Title | Issue Date |
| 7416641 | Apparatus for recovering marketable products from scrap rubber Tire pyrolysis systems and processes are provided which include feeding tire shreds to a pyrolysis vessel (40) and pyrolyzing the shreds in a pyrolysis vessel (40) to produce a pyrolysis gas and carbon black mixture. The pyrolysis gas processed by cent... | 08/26/2008 |
| 7347982 | Apparatus and method for recovering carbon black from pyrolysis byproducts A system (10), process and apparatus are disclosed for purifying carbon black (15) containing sulfur and metal oxide impurities by digesting (20) the impure carbon black in an acid to extract the metal oxide (25). Sulfur (45) is th... | 03/25/2008 |
