Abstract: An apparatus for fractional distillation under vacuum, comprising an evacuable vessel enclosing a first zone for liquid to be distilled, a second zone for distillate and a third zone for residue. The vessel is provided with a plurality of vertical tubular elements having side walls forming evaporator surfaces and being provided with inlet means at their upper ends for directing liquid to be distilled from the first zone towards the evaporator surface. Each hollow element surrounds at least partly a vertical cooling surface to cause condensation of vaporized liquid to form distillate, each hollow element being further provided with means for separately withdrawing distillate and residue from its interior into the second zone and the third zone, respectively. The vessel preferably consists of detachably interconnected wall portions.

Abstract: An apparatus for separating liquid particles from a gas-stream by passing the gas stream through a curved tube so that the liquid is caused to concentrate along the inner surface of the outer wall of the curved tube. The concentrated liquid together with some gas is passed to a liquid collecting chamber. The liquid is drained from the liquid collecting chamber and the gas is returned from the liquid collecting chamber to the main stream.