Abstract: A method for making a flow conducting unit cool down more slowly where the flow conducting unit has a holding unit and is penetrated by a heat transfer medium, the temperature of the heat transfer medium is reduced such that a wall of the flow conducting unit cools down, and the holding unit dissipates thermal energy such that the wall cools down more slowly.

Abstract: A method for separating asphaltenes from an asphaltene-containing fuel, wherein fuel is supplied to a separation unit in which a sub-stream with low-boiling fuel components of the fuel is separated. After separation of the sub-stream the fuel is supplied to a deasphalting unit in which asphaltenes contained in the fuel are separated by a solvent. After the separation of the asphaltenes from the fuel, the solvent is separated therefrom in a solvent recovery unit. The separated solvent is circulated back into the deasphalting unit, and a solvent fraction is obtained from the sub-stream that has been separated from the fuel, which is supplied to the deasphalting unit in addition to the solvent recirculated from the solvent recovery unit. A device is adapted for separating asphaltenes from an asphaltene-containing fuel.