Extraction

Extraction process involves separation of one or more components selectively from a liquid or solid mixture, the feed by means of a liquid immiscible solvent. For difficult separation such as in case of substances which have virtually the same boiling point form an azeotropic mixture or are perhaps temperature sensitive, extraction offers economical solution.

Extraction involves dissolving a particular substance ( C ) out of or extracting it from a carrier liquid (A) with the aid of a liquid extraction agent (B). The liquid-liquid extraction process is based on the unequal distribution of a substance between two liquids which are not soluble in each other. The substance (C) to be produced is in general transferred to the extraction agent by a purely physical exchange process. However the extraction agent can also act as a reactant as for example in metal salt extraction.
Capacity, selectivity, insolubility in the carrier phase, economic regeneration and mechanical separation of the liquid/liquid dispersion are criteria affecting the choice of a suitable extraction agent.

ATR ASAHI Provides the following Liquid~Liquid extraction setups :-

• Stirred columns Rotating disc contactor type DN50 to DN100.
• Mixer settler type DN50 to DN100.
• Spray tower type DN50 to DN100.
• Pulsed sieve plate and packed columns type DN50 to DN100.