ACTIVATED CARBON FOR FUEL PURIFICATION

摘要

An activated carbon, disclosed as useful in purification and decolorization of hydrocarbon fuel, particularly gasoline, is characterized by inclusion therein of polymerized phosphoric acid or reduced transition metals. The conversion of phosphoric acid to a polymerized phosphate content (e.g., as added to activated carbon or as residual in phosphoric acid-activated carbon) or reduction of transition metals (such as copper added to an activated carbon in a salt form in addition to whatever is already present therein as impurities) to a reduced form results from the activated carbon having been treated with inert gas or carbon dioxide at from about 1200° F to about 1800°F for at least 5 minutes. Alternatively, the conversion of phosphoric acid to a polymerized phosphate content can occur during phosphoric acid activation of carbon at activation temperatures in the range of 1150°-1600°F.