Asphalt blend compositions containing used motor oil and asphalt pavement compositions containing said asphalt blend compositions

摘要

An asphalt blend composition containing an asphalt component and a bottoms fraction from a used motor vaporization process of the above process, and a pavement composition comprising aggregate and the asphalt blend composition. The process comprises directly contacting used lubricating oil with a heated vapor, e.g., steam, under conditions which at least partially decompose the organo-metallic component and provide a desired volume of pumpable bottoms containing organo-metallic compound decomposition products and an overhead comprising gases and distillatable hydrocarbons, with no substantial carryover of metals into the overhead. The process may be carried out under conditions which minimize decomposition of high molecular weight additives such as VI improvers.