Elf France

Elf-union

Andre Ciais

Andre Lambelin

Gilles Variot

The present invention concerns a process for the thin layer evaporation of liquid in which the thin layer to be evaporated is formed by centrifugation. It is characterized in that the pointed part of the said cone is immersed in a reserve of liquid to be evaporated and a communication is established between the external face of the said pointed part of the cone and the internal face of this cone, so that the thin layer subjected to evaporation is formed on the internal face and on the external face of the cone. It concerns a device and installation for the distillation by evaporation in thin layers, particularly for hydrocarbons, and process for operating this device.

Device and installations for the distillation by thin layer evaporation

An apparatus to measure the asphaltene content of petroleum products where a precipitation evaporator for the sample is surmounted by a condensing unit. Immediately below the precipitation evaporator is a filtering unit with a rinsing vapor inlet line for conveying washing liquid from a balloon-flask evaporator. The precipitation evaporator is also equipped with an adjustable flap for preventing fluid from passing to the filtering unit.

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Mornant, France

Andre Ciais