in naphtha hydrotreater unit . surge drum draid contain blach colour naphtha , while o/h naphtha from topping is clear and water is clear also there a black film layer between water and naphtha appear while doing a drain can explain this



in naphtha hydrotreater unit . surge drum draid contain blach colour naphtha , while o/h naphtha from topping is clear and water is clear also there a black film layer between water and naphtha appear while doing a drain can explain this