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2. Acid–base extraction - Wikipedia

   en.wikipedia.org/wiki/Acid–base_extraction

   Acid–base extraction is a subclass of liquid–liquid extractions and involves the separation of chemical species from other acidic or basic compounds. [1] It is typically performed during the work-up step following a chemical synthesis to purify crude compounds [2] and results in the product being largely free of acidic or basic impurities.

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5. Multiphasic liquid - Wikipedia

   en.wikipedia.org/wiki/Multiphasic_liquid

   A multiphasic liquid is a mixture consisting of more than two immiscible liquid phases. Biphasic mixtures consisting of two immiscible phases are very common and usually consist of an organic solvent and an aqueous phase ("oil and water"). Multiphasic liquids can be used for selective liquid–liquid extractions or for decorative purposes, e.g ...

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7. Aqueous two-phase system - Wikipedia

   en.wikipedia.org/wiki/Aqueous_two-phase_system

   It is a common observation that when oil and water are poured into the same container, they separate into two phases or layers, because they are immiscible.In general, aqueous (or water-based) solutions, being polar, are immiscible with non-polar organic solvents (cooking oil, chloroform, toluene, hexane etc.) and form a two-phase system.

8. Thin layer extraction - Wikipedia

   en.wikipedia.org/wiki/Thin_Layer_Extraction

   With a typical liquid mass diffusivity in the order of 10 −9 m 2 /s, [2] the characteristic time for diffusion through a 20 micron thick liquid layer is 0.4 s. Therefore, the thinness of both phases (organic and aqueous) causes a relatively "immediate" mass transfer of guest species from one phase to the other, which means that this process has a low mass transfer resistance.

9. Liquid–liquid extraction - Wikipedia

   en.wikipedia.org/wiki/Liquid–liquid_extraction

   A separatory funnel used for liquid–liquid extraction, as evident by the two immiscible liquids.. Liquid–liquid extraction, also known as solvent extraction and partitioning, is a method to separate compounds or metal complexes, based on their relative solubilities in two different immiscible liquids, usually water (polar) and an organic solvent (non-polar).