JPS5919505A - Extraction apparatus - Google Patents

Abstract

PURPOSE:To reduce the plan floor area of an extraction apparatus, by a method wherein a settler chamber is formed into a shaft shape and an upward and a downward stream are imparted to separate the phase of both liquids while a packing layer comprising fluffy synthetic resin is provided in a direction at right angles with respect to each separated streams. CONSTITUTION:A heavy liquid and a light liquid respectively supplied from a heavy liquid inlet 1 and a light liquid inlet 2 are mixed in a mixing chamber 3 in an upwardly flowing stream. Subsequently, both liquids are introduced into a stationary separation chamber 5 through a flooding wall 4 and the heavy liquid is guided to the next process from a lower side heavy liquid outlet 8 while the light liquid is guided to the next process from a light liquid outlet 9 through an upper side flooding fence 4'. In addition, in order to perfectly separate both liquids, fluffy packing materials 6, 7 comprising synthetic resin are provided in the stationary separation chamber 5. As the result, because fine droplets mixed in each heavy liquid and light liquid phases can be removed and ultra- fine droplets unseparable by a conventional gravitational separation method can be separated; only a small installation floor area is required.

Description

[Detailed description of the invention] Regarding the extraction device used.

Conventionally, a mixer-settler type extraction device has been widely used as an extraction device that mixes a heavy liquid and a light liquid to extract metal ions and acids.

The patent for this mixer-settler type extraction device lies in its simple structure and the fact that the mixing ratio per seven stages (also known as the extraction rate) is close to the number of theoretical plates. However, this mixer-settler type extraction device is Light liquids are often used in multiple stages by bringing them into self-flow contact, and for phase separation in the settler, the projected floor area has a large influence on the phase separation between light liquid and 1 liquid, so the installation area is The disadvantage was that it required too much.

The present invention has been made to overcome these drawbacks of conventional extraction devices.

The present invention provides an extraction apparatus that uses a heavy liquid and a heavy liquid that are immiscible with each other, including (1) a mixing and stirring section equipped with a heavy liquid inlet, a light liquid inlet, and an agitator; (2) a mixing P/ and a stirring section; A static separation compartment for static separation of the mixed liquid in the side compartment, (3)
A communication means for connecting the mixing agitation section and the stationary separation section in a fluid flow manner; (5) An extraction device equipped with a packed bed separation zone for removing fine foreign-phase droplets mixed in each box, and (5) a discharge port for heavy liquid and light liquid on the downstream side of the two-layer separation zone. .

The present invention further includes a suction section in which a mixing agitation section is divided at the bottom, and the mixed liquid of the heavy liquid and the light liquid is guided from the suction section to the upper part of the mixing If agitation section, and the flow of the mixed liquid in the mixing and agitation section is directed downward. It also exists in an extraction device equipped with a means for raising the sudame.

The device of the present invention is a mixer-settler type extraction device that uses M liquid and light liquid that are highly miscible with each other, and has a vertical settler chamber whose installed floor area increases in proportion to the amount of liquid to be processed.
A method of phase separation is adopted in which both liquids are provided with an upper and a downstream flow.

The device of the present invention is constructed by providing a filling layer made of synthetic resin, metal, or natural fiber (e.g., paper) in the form of cotton or sheet or a mixture of cotton and sheet in the direction perpendicular to the flow of each phase-separated liquid. , rather than the conventional gravity sedimentation separation method, which separates fine foreign phase droplets mixed into the light liquid phase and heavy liquid phase.
P due to packed bed! This is a mixer-settler type extraction device characterized by reducing the projected floor area of the sump extraction device separated by a J mechanism.

Furthermore, in a mixing chamber where a light liquid and a heavy liquid are mixed, when a substance is transferred from the heavy liquid phase to the light liquid phase, it is convenient for the continuous phase to be the light liquid and the dispersed phase to be the heavy liquid. Conversely, when transferring substances from the light liquid phase to the heavy liquid phase, it is more convenient for the heavy liquid to be the continuous phase and the light liquid to be the dispersed phase. However, if the light liquid is a dispersed phase and the flow direction of both liquids in the mixing chamber is upward flow, the relief part will rise due to buoyancy, so the residence time will likely become shorter, resulting in insufficient mixing and a lower mixing ratio. There are drawbacks.

゛Also, in order to perform multistage countercurrent contact, a blade is required at the bottom end of the camellia stirring shaft to suck the heavy liquid and light liquid, and in conventional mixer-settlers, the flow direction of the liquid in the stirring tank is always upward. ing. For this reason, when the stirring is insufficient, the time the light liquid remains in the mixing tank may become extremely short.According to the device of the present invention, for example, as shown in Fig. By providing a connecting riser pipe on top of the mixing chamber and causing both the light liquid and heavy liquid in the mixing chamber to flow downward, it is possible to lengthen the residence time of the light liquid.

The present invention will be explained in detail below based on the drawings, but the present invention is not limited thereto.

FIG. 1 is a diagram showing an extraction device (〃) according to the present invention.The heavy liquid and the light liquid are supplied from the heavy liquid inlet/and the light liquid inlet by a stirring shaft 10 having a stirring blade at the tip, respectively, into a mixing chamber. 3, the liquids are mixed in an upward flow direction similar to the conventional mixer-settler type extraction device. Both liquids are led to the static separation chamber S through the overflow wall, and the heavy liquid is mixed in the lower left side of the static separation chamber. From the heavy liquid outlet g, the light liquid passes through the upper overflow fence 1 and is led to the next step from the light liquid outlet. By providing a filling layer 6 made of synthetic resin, metal chisel, natural fiber in the form of cotton or sheet, or a mixture thereof, fine droplets mixed in the heavy liquid and light liquid phases can be removed. By making it possible to separate even extremely fine droplets that could not be separated using conventional gravity separation methods, the device requires only a small installation floor space.

Figure 1 shows a layout mainly used for square ones, whereas Figure 2 shows a mixer-settler type layout which is circular and in which the mixing chamber 3 and the left side of the static separation chamber are located in an (8") central circle. It is an extraction equipment, and both the liquid inlet and the light liquid inlet are connected to the mixing chamber 3.
Since the stirring shaft 10 is placed at the top of the (sL), there is no need for a stirring blade for suction at the tip of the stirring shaft 10 as shown in Figure 1 and Figures 3 and 3 below. The flow of both the liquid and the light liquid is downward, and both liquids are separated at the bottom of the mixing chamber 3.As there are fine droplets of beads in each liquid phase, they are formed into flocculent, sheet-like or flocculent particles. By providing filling layers 6 and 7 made of synthetic resin, metal or natural fiber, which is a mixture of sheet-like materials, it is possible to create a mechanism for separating extremely fine droplets by passing both liquids. be.

Figure 3 shows a type of extraction device that is often adopted as a rectangular type as shown in Figure 1.
A suction blade 10a is provided at the tip of the blade. In the conventional method, the light liquid moves from the upper position to the lower side due to gravity, whereas the heavy liquid that moves from the lower position to the upper position is sucked, so the suction is mixed from the suction chamber/da as shown in the figure. By providing the rising communication pipe/3 at the top of the chamber 3, the flow direction in the mixing chamber 3 can be directed downward. Therefore, when the dispersed phase is a light liquid, it is possible to avoid an extremely short residence time of the light liquid due to insufficient mixing of the light liquid in the mixing chamber.

Figure 7 shows the rising connecting pipe from the suction chamber/G to the upper part of the mixing chamber 3/
3, both the heavy and light liquids flow downward in the mixing chamber 3 and move from the mixing chamber outlet/2 to the stationary separation chamber. In this way, by providing the ascending communication pipe and directing the flow of the heavy liquid and light liquid in the mixing chamber downward, the residence time of the light liquid is extended, and the mixing ratio of the extraction device is improved.

The materials used for the filling layer of the present invention include synthetic resins such as polyester, polyvinyl chloride, polyethylene, styrene, polypropylene, ethylene tetrafluoride or difluoride, and metals such as stainless steel, common steel, nickel, tungsten, and copper. Single or alloy fired crystals, fibrous ones,
Natural fibers include paper, cotton, etc.

Next, the present invention will be explained in more detail with reference to Examples.

Example / 30% D2KHP as a light liquid containing Fe/, 2 g/l
A (Gicoethylhexyl + #fF2) + 70
% normal paraffin as heavy liquid, 200 g/
1 HCI was selected and a continuous test was conducted in which Fθ/, 2 g/l in a light liquid was transferred to a heavy liquid. The extraction device used is the device shown in Figure 1 based on the present invention, and the material of the packed layer for the heavy liquid phase is three layers of polyethylene coated, and the material for the packed layer for the light liquid phase is cotton-like polyester. However, the projected floor area ratio is 41. ool/m' time. The heavy liquid contained in the light liquid during continuous operation is o, o q ratio (hereinafter referred to as weight ratio), and the light liquid contained in the heavy liquid phase is 0.00.7%.
Met.

On the other hand, as a result of continuous operation using the conventional horizontal mixer-settler type extractor shown in Figure S under the same conditions as above, the proportion of heavy liquid mixed into the light liquid was 8A%. Ta.

Example Contains 30% D2KHPA + 70% isoparaffin as a light liquid and 20 g/l of Fe ions as a heavy liquid, and has a specific gravity of /s o g/lHN○, +3 ojJ
/IHF was used to conduct a continuous test in which Fe ions in the heavy liquid were transferred to the light liquid side using the apparatus shown in FIG. Also, for comparison, the conventional example is used as well.

A horizontal mixer-settler type extractor adopted from the company and shown in Figure S was used for continuous operation under the above-mentioned four conditions.

When the device of FIG. 3 according to the present invention was used, the droplet amount of the heavy liquid mixed into the light liquid was 0.01% when the Fe 2 ion concentration was 9/11. On the other hand, in the conventional mixer-settler type device, 0. g%. However, when using the apparatus shown in FIG. 3 according to the present invention, the amount of light liquid mixed into the heavy liquid phase can be reduced by 4 (4) into the heavy liquid phase.
The heavy liquid phase side was made of polyester cotton, and the filling height was 10 ml and 1 m, respectively.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of an extraction device having a packed bed according to the present invention, Fig. 1 is an analytical view of an extraction device ^101 in which a mixing chamber and a static separation chamber according to the invention are located concentrically, and Fig. 3 is a cross-sectional view of an extraction device according to the present invention having a packed bed. Figure 1 is a cross-sectional view of an extraction device with a rising connecting pipe according to the invention; Figure 1 is a cross-sectional view of a mixing chamber with a connecting rising pipe in the mixing chamber; In the figure, /...heavy liquid inlet, λ...light liquid inlet, 3...mixing chamber, G...overflow wall, S...static separation chamber, 6.7...packed bed,・・Heavy liquid outlet, 9.・Light liquid outlet, lO・・Stirring shaft,
l/... phase separation interface, /2... mixing chamber outlet, 13... ascending connecting pipe, /4/... suction chamber 1, e', - 蓬〉糺7en Z
0Patent Applicant Representative of Nippon Solex Co., Ltd.

Claims (1)

[Claims] l An extraction device using a heavy liquid and a light liquid that are immiscible with each other, (1) a mixing and stirring section equipped with a heavy liquid inlet, a light liquid inlet, and an agitator; (2) a mixing- a stationary separation section for stationary separation of the mixed liquid from the stirring section; (3) communication means for connecting the mixing and stirring section and the stationary separation section in a fluid flow manner; (4) the stationary separation section. (5) Packed bed separation zones to remove fine foreign phase droplets mixed into the heavy liquid and light liquid phases at the top and bottom of the An extraction device comprising an outlet. A mixing and stirring section is provided with a suction section sectioned at the bottom,
The extraction according to claim 1, further comprising a rising communication means for guiding the mixed liquid of heavy liquid and light liquid from the compartment to the upper part of the mixing and stirring compartment and directing the flow of the mixed liquid in the mixing and stirring compartment downward. Device. 3. The extraction device according to claim 1, wherein the filling layer is made of synthetic resin, metal, or natural fiber in the form of cotton or sheet, or a mixture of cotton and sheet.