Consecutive reflux liquid extracting device of helix tube and the fractional extraction method and the chromatogram eliminating method

Abstract

The patent of the present invention relates to a spiral tube continuous countercurrent liquid-liquid extraction device, a fractional distillation extraction method and a chromatographic elution method that realize separation through continuous countercurrent extraction. A spiral tube continuous countercurrent liquid-liquid extraction device, including an extraction mechanism, a sample injection control mechanism and a storage tank, the extraction mechanism is a spiral tube wound by a hollow tube, and the sample injection control mechanism includes a three-way solenoid valve and a metering pump; The fracture in the middle section of the spiral tube and the two ends are respectively connected to the metering pump through the three-way solenoid valve of the sampling control mechanism. The three-way solenoid valve and the metering pump are controlled by a relay with time delay or a PLC electric control box, and its action program is controlled by Users change at any time according to the extraction conditions. The device can be used as an experimental device suitable for most liquid-liquid extractions, and can realize the continuous separation process of difficult-to-separate components (such as homologues); compared with the separation, the main extraction conditions such as extraction stages can be set freely fixed; has the advantage of easy industrial scale-up.

Description

technical field [0001] The patent of the present invention relates to an extraction device which realizes separation by means of continuous countercurrent extraction and its fractionation extraction method and chromatographic elution method. Background technique [0002] Solvent extraction is one of the important unit operations for separating liquid mixtures. A liquid solvent that is insoluble or partially miscible is added to the liquid mixture to be separated to form a two-phase system, and the operation of separating the mixture by using the different properties of the components in the mixed liquid in the two phases is called liquid-liquid extraction. In actual production, in order to achieve a higher extraction rate with less extractant, multi-stage countercurrent extraction is often used. The operation process is as follows: figure 1 shown. [0003] The raw material liquid enters the system from the first stage, and is successively extracted by each stage to become...

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Problems solved by technology

As the representative of the existing multi-stage countercurrent extraction laboratory equipment, the device has the disadvantages that: the device cannot realize the continuous feeding process of the material to be separated; the complex mechanical structure also restricts the further industrial enlargement of the device; the device mainly Applied in the solid extraction of traditional Chinese medicine; the application ability in liquid extraction is insufficient

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