(under subclass 39) Processes directed to extracting a liquid product of a distillation step with a liquid.
(1) Note. The extraction with a liquid must take place subsequent to the vaporization of the distilland. The liquid extracted may be the initial distillate or residue or a product of a subsequent distillation operation.
SEE OR SEARCH CLASS
23, Chemistry: Physical Processes,
306+, for process of concentrating a liquid in liquid.
95, Gas Separation: Processes,
190, for processes, per se, of gas separation utilizing liquid contacting and separation of liquid from the contact liquid by liquid-liquid extraction. 208, Mineral Oils: Processes and Products,
311+, for a process in which mineral oil is mixed with or contacted with another liquid which will dissolve or is miscible with a portion or fraction of the oil and by so doing forming a liquid phase which is immiscible with another portion or fraction, particularly subclass 339 and under
subclass 311 see "SEARCH THIS CLASS, SUBCLASS" and "SEARCH CLASS" for related fields of search.
210, Liquid Purification or Separation,
634+, for a process of extracting a solute from a liquid solution by contacting the solution with a second liquid.
260, Chemistry of Carbon Compounds, and its daughter Classes 530-570 appropriate subclasses for a process of isolating or purifying a nonhydrocarbon carbon compound including a liquid extraction step and
705, for a process including extracting a carbon compound from a mixture.
423, Chemistry of Inorganic Compounds, appropriate subclasses for a process of isolating or purifying an inorganic compound by an extracting, leaching or dissolving step.
424, Drug, Bio-Affecting and Body Treating Compositions, for a process of producing a composition of that class and which may include an extraction step. See especially
123+, 195.1+ and 520+.
426, Food or Edible Material: Processes, Compositions, and Products,
425+, for extracting or using a liquid as an extracting medium. 585, Chemistry of Hydrocarbon Compounds,
833+, for hydrocarbon purification by solvent extraction.
