(under the class definition) Processes in which only water is removed from the feed mixture.
(1) Note. For purposes of this and indented subclasses water is the impurity of the distilland which is to be removed. A process of removing other impurities as well as water is excluded.
(2) Note. A plural distillation process of separating only water by adding an extraneous liquid to the distilland to
alter the relative volatility of water and the liquid be dried in the initial distillation step and then distilling a product of the initial distilling operation to separate the extraneous liquid is classified here.
SEE OR SEARCH THIS CLASS, SUBCLASS:
10+, for a process in which the only material recovered as a product is water and 50+ for a process directed to adding a specific extraneous material to alter the relative volatility of a component of a mixture.
SEE OR SEARCH CLASS 23, Chemistry: Physical Processes,
306, for a process of concentrating a solution of a liquid in a liquid not otherwise provided for.
34, Drying and Gas or Vapor Contact With Solids, appropriate subclasses, under "Processes" for a process for separating a liquid from a solid.
62, Refrigeration,
93+, for a process of removing moisture from air.
95, Gas Separation: Processes, appropriate subclasses for processes of removing water from a gaseous fluid mixture. See particularly
117+, for solid sorption processes to remove water from a gaseous fluid mixture and subclass 231 for processes of liquid contacting to remove water from a gaseous fluid mixture.
