GB545781A - Improvements in vacuum distillation - Google Patents

Abstract

545,781. Evaporators and condensers in structural combination film evaporators. DISTILLATION PRODUCTS, Inc. Oct. 15, 1940, No. 15284. Convention date, Nov. 3, 1939. [Class 32] In the high vacuum unobstructed path fractional distillation of liquids of the kind in which the liquid flows upwardly by centrifugal force over an inverted rotating conical evaporating surface, separate fractions are separately condensed on a plurality of separate surfaces arranged within the conical surface and separated therefrom by an unobstructed space. The condensing surfaces are arranged so that the condensates thereon flow back to the distilling surfaces. Distilland is introduced by a pipe 34 on to the surface of a rotating cone 28 heated by an electric heater 32 and the vapours formed are condensed on cooled cylindrical surfaces 38, 40, 42 the condensate from the surfaces 38, 40 being returned by gravity to the cone from which they are re-evaporated. The condensate from the surface 42 is removed by a magnetically operated pump 52. A plurality of cones A, B, C, D, E, Fig. 3, may be arranged in one container the residual distilland from one cone being fed to the next in series. Instead of using a pump the distillate from surface 42 may be allowed to fall into the apex of the cone 22, Fig. 5, from which it is removed through holes 154 to a gutter 156. Specifications 434,726 and 467,028 are referred to.