(under subclass 71) Processes in which at least one distilling operation is directed to introducing the distilland into the vaporization zone by spreading it as a thin film over a surface.
(1) Note. The surface on which the distilland is spread may be liquid, solid or foraminous.
SEE OR SEARCH THIS CLASS, SUBCLASS:
89, for a process involving a single distillation operation in which the distilland is spread as a thin film over a surface.
SEE OR SEARCH CLASS
159, Concentrating Evaporators,
5+, for concentrating apparatus of the film type including subclasses 13+ for evaporating apparatus designed to maintain the liquid being evaporated in a film and subclass 49 for an evaporating process in which the liquid to be concentrated is spread in a thin film. 196, Mineral Oils: Apparatus,
128, for vaporizing apparatus for distilling mineral oil in a thin film.
202, Distillation: Apparatus,
236, for separatory distillation apparatus in which the still has means for intro- ducing the distilland into the still in the form of a spray or the distilland is introduced into the still in the form of a film.
208, Mineral Oils: Processes and Products,
360, for a process of distilling mineral oil wherein the oil is spread as a thin film on a surface.
