JPH0664701U - Experimental rotary stirring liquid-liquid countercurrent extraction device - Google Patents

Abstract

(57) [Summary] [Objective] This invention aims to (1) improve the stirring to disperse the liquid, and (2) eliminate the sedimentation of the suspension,
(3) The present invention relates to a rotary stirring type liquid-liquid countercurrent extraction device for experiments, which prevents outflow by a siphon. [Structure] In the experimental rotary stirring liquid-liquid countercurrent extraction device, the rotor of the stirring section of the extraction tower was made into a cross shape, and the inlets of the solvent and the liquid to be extracted were extended to approach the stirring shaft. hand,
The dispersion contact of both solutions was improved. The suspension was extracted well with the solvent by stirring just above the storage tank for the liquid to be extracted containing the suspension and the horizontal structure in the tower. The extraction solvent overflow port and the interface adjuster were provided with upward air circulation ports to prevent outflow by siphon. By the above improvement, the liquid containing the suspension can be easily and efficiently extracted.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 In this device, the aqueous solution containing the useful substance is lowered from the upper side, the organic solvent having a low specific gravity is raised from the lower side, and the fine particles are dispersed into each other by stirring to bring the two liquids into good contact with each other. The present invention relates to a rotary stirring type liquid-liquid countercurrent extraction device for transfer extraction to a solvent.

[0002]

[Prior art]

 (1) The commercially available rotary stirring liquid-current countercurrent extractor currently on the market has baffle plates at regular intervals inside a glass cylinder, and the disc rotor is positioned so that it is located between the upper and lower baffle plates. Is provided through the stirring shaft, and normally, the combination of the baffle plate and the rotor is provided in 20 to 40 steps. In actual operation, even if the stirring shaft was raised to a maximum speed of 500 rpm, a considerable part of the liquid to be extracted adhered to the wall surface and formed a thin layer that flowed down, and part of the baffle plate. Although it is ejected from the droplets to form water droplets, the size of the droplets is about 1 to 3 mm, and since the droplets flow down while rotating between the baffle plate and the trochanter, the contact between the two liquids is sufficient. However, useful substances are not completely extracted. (2) If there is a suspension in the liquid to be extracted, the suspension will gradually settle down and the composition of the suspension will change, and an emulsion will easily form in the part where the suspension is large. There is a case that the useful component is not completely extracted because it is deposited on the portion and does not come into contact with the solvent, and the holes of the plate of the bearing portion 20 are blocked to prevent the flow of the liquid. (3) If a downward pipe is connected to the solvent overflow pipe 6 on the upper part of the main body and the outlet pipe of the liquid to be extracted from the interface controller 9 installed near the upper part of the main body, it becomes a siphon when the liquid flows. As a result, the liquid in the extraction tower may flow out.

[0003]

[Problems to be solved by the device]

 The present invention eliminates those drawbacks, and (1) improves the extraction effect by dispersing the liquid in fine particles to improve the contact between the two liquids. (2) When the suspension is a liquid, prevent its deposition. (3) Eliminate parts that are likely to form siphons. The above points are solved.

[0004]

[Means for Solving the Problems]

 The solutions are described below. (1) The shape of the rotor 2 attached to the rotary shaft 3 is not a circular plate, but a cross-shaped shape in which four sides of the circular plate are cut out as shown in FIG. Further, the injection port 10 for the liquid to be extracted and the injection port 11 for the solvent were not only attached to the main body, but the ends were extended to reach the vicinity of the rotation axis. (2) A stirrer 17 is provided in the storage tank 16 for the liquid to be extracted containing the suspension, and a horizontal portion for causing the deposition of the suspension, that is, a bearing portion perforated in the suspension, a porous plate 20 and a solvent injection port 11 are provided. The same rotor 19 as in (1) was provided above. (3) Upward air circulation pipes 14 and 15 were attached to the solvent overflow pipe 6 at the upper part of the main body and the interface controller 9 mounted near the upper part of the main body.

[0005]

[Action]

 As a result of the above, (1) The liquid exiting the inlet is transmitted down the rotating shaft, comes down to the rotor, is repelled by centrifugal force, becomes finer, and is further dispersed and extracted by the turbulent flow of the liquid. The efficiency of is significantly improved. (2) The liquid to be extracted in the storage tank was kept homogeneous without sedimentation, and was completely extracted because there was no suspended sediment remaining in the extraction tower. No more clogging and poor liquid flow. (3) Since the upward air flow pipe was attached to the overflow pipe and the interface controller, it became possible to prevent the liquid in the column from flowing out by forming a siphon.

[0006]

【Example】

 The present invention can be implemented as follows. (1) The shape of the rotor may be a rectangle, a clover shape, a triangle, a quadrangle, a hexagon, or a disk with radial grooves. For liquids that tend to become emulsions, slow the rotation to prevent emulsions. (2) Stir the suspension tank with a magnetic stirrer or a motor stirrer. The rotor that prevents the deposition of suspension may be the same as in (1). It is better to use a metering pump to pump the liquid to be extracted and the solvent. Pumps with ball valves are not suitable for suspensions. Since the solvent may remove the tube, it is necessary to select the material of the tube metering pump and the tube of the pipe. (3) It is convenient to attach a 3-way cock to the overflow pipe instead of an upward pipe and a 2-way cock to the interface controller for cleaning.

[0007]

[Effect of device]

 It was used to extract a solution containing a useful substance, especially a solution in which a useful substance is suspended, and compared to a conventional device of the same type, extraction was possible in a short time without much trouble. Attempts to extract a suspension using a separating filter often result in an emulsion that is very difficult to separate, which is difficult.

[Brief description of drawings]

FIG. 1 is a schematic view of an experimental rotary stirring liquid-liquid countercurrent extraction device.

FIG. 2 is a partial cross-sectional view of the stirring section of the extraction tower.

FIG. 3 is a plan view of an example of a rotor of the present invention, a cross shape.

[Explanation of symbols]

 1 ... Inner wall baffle plate 2 ... Stirring shaft rotor 3 ... Stirring shaft 4 ... Stirring part 5 ... Upper stationary part 6 ... Extraction solvent overflow pipe 7 ... Lower stationary part 8 ... Extracted liquid outflow pipe 9 ... Interface controller 10 ... Extracted liquid injection pipe 11 ... Solvent injection pipe 12 ... Extracted liquid introduction pipe 13 ... Solvent introduction pipe 14 ... Air distribution pipe 15 ... Air distribution pipe 16 ... Extracted liquid storage tank 17 ... Stirrer 18 ... Organic solvent Storage tank 19 ... Deposition prevention rotor 20 ... Stirring bearing with plate

Claims (3)

[Scope of utility model registration request] 1. The experimental rotary stirring type liquid-current countercurrent extraction device shown in FIG. 1 has baffle plates 1 of 10 to 40 steps attached to the inner wall of a vertical cylinder at regular intervals, and a baffle plate and an alternate position at the center thereof. A rotary shaft 3 with a rotor 2 is provided as a stirring unit 4, an extension of the upper portion thereof is an extraction solvent stationary unit 5 and an overflow pipe 6 is provided at the upper portion thereof, and an extension of the lower portion of the stirring unit is a liquid to be extracted. The stationary part 7 has a structure in which an outlet 8 for the liquid to be extracted is provided at the lower part thereof, and the tip of the outlet 8 is guided to the upper part by a flexible tube and an interface controller 9 for the solvent and the liquid to be extracted is provided at the end thereof. In this device, (a) the rotor 2 of the rotary stirring shaft is a disc or a polygonal plate with a notch or a groove. (B) The injection pipe outlet 10 for the liquid to be extracted and the injection pipe outlet 11 for the solvent are provided close to the rotary stirring shaft 3. The experimental rotary stirring type liquid-liquid countercurrent extraction device devised as described above. 2. An agitator 1 is provided in the storage tank 16 for the liquid to be extracted.
7 is provided. (B) A rotary stirring type liquid for experiment according to claim 1, which is configured by providing a rotor 19 similar to that of (a) above a horizontal part or a protruding part such as the porous plate 20 of the bearing part or the injection pipe outlet 11. Flow extractor 3. The solvent overflow pipe 6 and the extraction liquid outflow pipe interface controller 9 are provided with upward pipes 14 and 15 to prevent siphoning. Experimental rotary stirring liquid-liquid countercurrent extraction device.