A liquid-liquid extraction system includes extraction stages, a pumping system, and a controller. Each extraction stage has a chamber, a primary input, a raffinate output, and an extract output. An input liquid (e.g., either a source liquid or raffinate from a preceding extraction stage, mixed with an extraction liquid) is presented to the chamber via the primary input. The chamber enables phase separation of liquid therein, into a raffinate and a extract, where the raffinate exits the separation vessel at the raffinate output, and the extract exits the separation vessel at the extract output. A level sensor is coupled to the chamber and the controller is operatively programmed to read an output of the level sensor, compare the output of the level sensor to a target, and cause the associated chamber to receive additional liquid if the output is lower than the target.

Provided are a continuous post-treatment method and device for a penem compound. The method includes the following steps: S1, performing continuous extraction on a reaction crude product of a penem compound, to obtain an extraction heavy phase and an extraction light phase; S2, performing continuous solid-liquid separation on the extraction heavy phase, to obtain a liquid phase separation product; S3, performing continuous pH adjustment on the liquid phase separation product until a pH value thereof is 6.1-6.3, to obtain pH-adjusted solution; and S4, performing continuous crystallization treatment on the pH-adjusted solution by a first crystallization solvent, to obtain a penem compound product. The use of the method has the advantages of high treatment speed and high efficiency, and stable material properties and a low deterioration rate during the treatment, and has better control over the yield and purity of a target product.

A process for the microfluidic extraction of molecules of interest from a vegetable oil, which utilizes a microfluidic chip with a double-Y-channel circuit, two inlets, two outlets, and a main channel, a first vessel including vegetable oil and a second vessel including ethanol for extraction, a pressure controller for pressurizing the vegetable oil and the ethanol, a first collector for the triglycerides-enriched vegetable oil and a second collector for molecules of interest-enriched ethanol. The extraction process includes: controlling the pressures to subject each of the vegetable oil and the ethanol to a pressure, so the interface between the two fluids is positioned at the junction point of inlets, bringing the vegetable oil and ethanol into contact with each other in the main channel for a time to enable extraction of the molecules of interest, collecting the molecules of interest-enriched ethanol, optionally, evaporating the ethanol, collecting the triglycerides-enriched vegetable oil.