METHOD FOR REMOVING TRACE AMOUNT OF MERCURIES IN HYDROCARBON-BASED OIL

摘要

PURPOSE:To selectively and efficiently remove mercuries in an oil for a long period by heat-treating a hydrocarbon-based oil containing the mercuries and bringing the heat-treated oil into contact with active carbon (carrying a specific metal). CONSTITUTION:A hydrocarbon-based oil containing mercuries is heat-treated under conditions of normally 50-400 deg.C and 0.5-35kgf/cm2G pressure and 0.2-100hr-1 space velocity. The resultant heat-treated oil is then brought into contact with active carbon itself or carrying one or more metals selected from iron, Ni, copper, Zn, tin, Al and Cd, alloys thereof or oxide, chloride, sulfide or a mixture thereof to remove the mercuries in the oil. Furthermore, active carbon having normally 100-1500m2/g specific surface area and 0.5-1.2cc/g pore volume is selected as the active carbon.