(under subclass 347) Processes wherein a gas or vapor is employed to effect volatilization of the distilland.
(1) Note. The gas or vapor, for example, may be added prior to or during vaporization. Steam, carbon dioxide, nitrogen, methane, fuel gas, and combustion gases are examples of gases or vapors used in the processes classified herein, and may, for example, be added to lower the partial pressure of the volatile constituents permitting vaporization at lower temperatures.
SEE OR SEARCH THIS CLASS, SUBCLASS:
43, for processes of obtaining tars and pitches by distilling tars in the presence of hot gases (e.g., coal gases).
128+, for cracking processes wherein vapors are added to the
mineral oil being heated prior to or during cracking.
356, for processes of rectifying mineral oil in the presence of an added gas or vapor. SEE OR SEARCH CLASS
196, Mineral Oils: Apparatus,
126, and 127 for mineral oil vaporizing apparatus having means to inject gases or vapors into the vaporizing zone.
203, Distillation: Processes, Separatory,
49, for a convective distillation processes and subclasses 76, 79, 83, 85, 92+, and 95+ for a distillation process in which steam is added.
