Abstract: A method of selective and efficient removal of mercury from a hydrocarbon oil comprising contacting said oil with a cupric and/or stannous compound forming a reaction system. The purified hydrocarbon oil can be readily separated from the reaction system. The purified hydrocarbon oil does not contain mercury or any other catalyst poisoning component and can, therefore, be used extensively in catalytic reactions typified by hydrogenation reaction.

Abstract: A reflection type heater comprising a box-shaped housing having a front face, with a front opening, and a top face. A burner and a burner chimney are contained in the housing. A reflecting plate is provided behind the burner chimney to reflect radiant heat from the burner chimney toward the front face of the housing. A top plate is laid on the top face of the housing. The top plate includes a tray located in that region of the top face which is enveloped by the reflecting plate, and a roof plate located in the remaining region of the top face of the housing. A guard in the form of an endless belt with its surface vertical extends along the edge of the tray.