JP5613895B2 - Crystal filtration method - Google Patents

Description

  The present invention relates to a technique for separating a solution and a mixture composed of liquids and solids insoluble in the solution.

Conventionally, there are chemical and physical separation techniques as separation techniques for liquid-liquid mixtures and solid-liquid mixtures. The chemical separation technique is to extract a target substance using a solvent such as hexane. Further, as a physical separation technique, the following separation plate type centrifugal separation method is mainly used, and there are a filtration method and the like. Here, the liquid-liquid mixture is a mixture of a solution and a liquid insoluble in the solution (hereinafter referred to as an insoluble body) (may be a plurality of insoluble bodies), and a solid-liquid mixture is a liquid and a solid. Product (solid may be solidified oil). Hereinafter, the liquid-liquid mixture and the solid-liquid mixture may be collectively referred to as a mixture to be separated.
1. Separation Plate Centrifugal Separation Plate Centrifugal Separation Plate Centrifugal Separation Plate Centrifugal Separation Plate Centrifugal Separation Plate Centrifugal Separation Plate Centrifugal Separation Plate Centrifugal Separation Plate Centrifugal Separation Plate Centrifugation Method The substance is separated. Therefore, the separation ability is proportional to the specific gravity difference between the dispersion medium in the mixture to be separated and the liquid and solid matter insoluble in the dispersion medium, and inversely proportional to the viscosity of the dispersion medium. This technique is often used as a liquid-liquid / solid-liquid separation technique.
The structure and principle of the technology of the above-mentioned separation plate type centrifugal separation method (Disk-centrifugation) are described in, for example, Patent Document 1 and Non-Patent Documents 1 and 2.
U. S. PAT. 2179941, 11/1939, 233/27 Perry Robert H. "Perry's Chemical Engineers'Handbook," 6th ed. , P.M. 19, 89-103 (1984) Kenzo Toyama, Toru Takagi, Takeshi Watanabe, “Fisheries Oil Science”, Housseisha Koseikaku Co., Ltd. 19 (1988)

2. Filtration method Filtration method forms a filtration layer with porous (diatomaceous earth, etc.) or fibrous filter material, supplies the separation mixture to the filtration layer under pressure or centrifugal force, and supplies a liquid with low viscosity or liquid Is passed through a filtration layer, and a high-viscosity liquid or solid is captured and separated in the filtration layer.
The filtration method is considered to be a technique that can be used for separation of minute and small viscous liquids and emulsions, suspensions, and solid-liquid and liquid-liquid mixtures having a small specific gravity difference.
The technique of the said filtration method (Filtration) is described in the patent document 2 and the nonpatent literature 3, 4, 5, 6, for example.
U. S. PAT. 4368119, 1/1983, 210/137 Perry Robert H. "Perry's Chemical Engineers'Handbook," 6th ed. P .; 19, 65-89 (1984) Spielman, L .; A. and Goren, S .; L. , “A review of progress in the coalescence of liquid-liquid suspension and a new theoretical framework for porous by media.”, A review of progress in the coalescence of liquid-liquid suspension and a new theoretic framework for porous by media. Eng. Chem. , Vol. 62, no. 10, P.I. 10-24 (1970) Scheidegger, A.M. E. "The Physics of Flow through Porous Media," 3rd ed. , University of Toronto Press, Toronto (1974) Toshio Furukawa, “Cost reduction measures for liquid cleaning”, Chemical Equipment, Industrial Research Committee, P.A. 32-43 (1998)

The above-mentioned conventional chemical separation technique becomes a high-cost method due to the modification of the target substance with a solvent such as hexane and the distillation operation for solvent recovery.
On the other hand, the separation plate type centrifugal separation method and the filtration method which are physical separation techniques have the following problems.
1. Separation plate type centrifugal separation method
{Circle around (1)} (from the principle of the first page, lines 15 to 27) When the specific gravity difference between the separation objects cannot be obtained or when the dispersion medium has a high viscosity, it cannot be used.
(2) Further, according to the above principle (specific gravity difference and dispersion medium viscosity), the higher the temperature of the mixture to be separated, the higher the separation ability. For this reason, in the separation plate type centrifugal separation method, the mixture to be separated is often used after being heated.
(3) Since a powerful (high rotation) centrifugal force is required, there is a limit to the amount of processing (size of the apparatus).
2. Filtration method In conventional filtration methods, it is difficult to separate the trapped material (viscous liquid and solid matter) trapped in the filter medium after the filtration treatment and the filter medium. For this reason, many filter media (diatomaceous earth etc.) have the following problems.
(1) It is not possible to recover the trapped material captured by the filter medium.
{Circle around (2)} In {circle around (1)} above, disposal of filter media also causes pollution problems such as bad odor.
(3) The cost of the filter material for replacing the filter medium and the disposal of the filter medium after use (disposal, etc.) are excessive.
{Circle around (4)} {circle over (2)} and {circle around (3)} mean that it is difficult to apply the filtration method when there are a large number of objects to be trapped in the filter medium.
As a method for solving the above-mentioned problems, there are cleaning methods for regeneration of the trapping material (filter material or membrane material) and recovery methods of the trapped material, but these also have the following problems.
(1) Cleaning and regeneration of trapping material using water or aqueous solution:
Regeneration is often incomplete (because the objects to be captured are trapped in pores or fine spaces). In addition, a large amount of cleaning liquid is used. For this reason, it is difficult to recover an object to be captured from the cleaning liquid after cleaning, or disposal (waste liquid) treatment of the cleaning liquid becomes expensive.
(2) Washing and regeneration of trapping materials using organic solvents, or recovery of trapped materials:
Separation of the solvent and the trapped substance after using the solvent is generally performed by an evaporation method (see page 8, lines 2 to 7). For this reason, there is a problem of high cost and denaturation of the captured object.
As one type of filtration method, there is a coalescer technique using a lipophilic fibrous substance. Coalessa technology is used to separate waste oil or mineral oil in aqueous solution. However, this technique is not suitable for solid-liquid separation (due to the difficulty in collecting the captured material described above with the filter medium (fibrous material)), and it is not natural (septic) oils and fats. There is no example used to separate the aqueous solution from the aqueous solution.
In addition, there is a membrane method as a separation technique similar to the filtration method. However, when the membrane method is used for separation of natural oils and fats and aqueous solutions, the viscosity of the oils and the cleaning of the filter medium (high cost, etc.) are problematic and there are few practical examples.
An object of the present invention is to solve the problems of conventional separation methods and apparatuses for separating a target substance from a mixture to be separated.

In order to achieve the above object, the present invention is basically a physical separation method and apparatus composed of the following steps 1, 2, and 3 (FIG. 1).
1) Step 1: The filter crystal 2a is produced from the stock solution 1a.
Here, the filter crystal is a single crystal or polycrystal (hereinafter referred to as crystal) having the following size or shape. Fine (including granular) crystals, or needle / bar, or dendritic, flake / plate, or crushed crystals, crystals containing the crystals shown on the left, or crystals containing a mixture of the crystals shown on the left It is. The filter crystal may be accompanied by a liquid.
2) Step 2: A filtration layer (hereinafter, crystal filtration layer 6a) is formed using the filter crystal 2a. Next, the separation mixture 5a is supplied to the surface of the crystal filtration layer 6a, and the separation mixture 5a is divided into a crystal filtration layer and a crystal filtration layer support wall (the left support wall includes a rotating basket hole wall, a filter cloth, a screen, etc. The liquid is separated into the passing liquid 7a passing through the crystal filtration layer and the trapped substance (large viscosity solution 8b and solid matter) of the crystal filtration layer trapped in the crystal filtration layer.
3) Step 3: Collect the crystal filtration layer 6a and the material to be captured in the melting tank 8. The crystal filtration layer is melted in the melting tank 8.
The effect | action of the said structure of this invention is the following (it describes corresponding to 1 of said process, 2), and 3)).
1) The stock solution 1a is sent from the stock solution tank 1 to the filter crystal generator 2.
The filter crystal generator 2 generates the filter crystal 2a from the stock solution 1a. Regarding the filter crystal on the left, the following methods and devices for generating various types of ice (such as artificial snow) are described.
Patent Document 3 describes an apparatus that generates ice by injecting low-humidity / low-temperature compressed air into spray water. Also, Green Fine Air Tech Inc. (Korea) (2009) sells equipment using a rotating freezing drum that produces ice powder. In addition, there is an ice generating device that introduces water vapor from a warming humidifier to a cooling plate, grows frost on the cooling plate, and scrapes the frost from the cooling plate. Further, there is an apparatus for introducing water vapor from low-temperature humidified water vapor into a rotating film, growing frost on the film, and removing the frost from the film.
Examples of the product other than water that can be the filter crystal of the present invention include clathrate hydrate (Patent Document 4).
PCT / JP2007 / 074330 U. S. PAT. 6237346 B1 5/2001, 62/4

The size and shape of the crystals produced by the above method are considered to be a filter medium for trapping viscous solutions and solids.
2) The filter crystal 2a from the filter crystal generator 2 is put into the separator 6, and a crystal filtration layer 6a using the filter crystal 2a as a filter medium is formed in the separator. Here, as a means for sending the filter crystal 2a from the filter crystal generator 2 to the separator 6, it is preferable to use a transport means such as a screw conveyor.
Next, the to-be-separated mixture 5a is supplied to the surface of the crystal filtration layer 6a (in which centrifugal force, pressure difference, or a combination force thereof works in the separator 6). Here, the separator 6 does not have to be a centrifugal separation means (such as a cylinder by a pressure difference or a vessel). In the centrifugal separator 6, the supply of the separated mixture 5 a to the crystal filtration layer 6 a is preferably sprayed.
In addition, let the temperature of the to-be-separated mixture 5a supplied be the temperature at which the filter crystal 2a maintains the role of a filter medium. The temperature of the mixture to be separated may be lower than the melting point of the filter crystal.
Further, the separation mixture 5a may be frozen (before being supplied to the crystal filtration layer 6a), and the effect of eliminating the emulsion in the separation mixture 5a may be expected (Non-patent Document 7).
Iritani, E .; S. Matsumoto and N.M. Katagiri, “Formation and Consolidation of Filter Cake in Microfiltration of Emulsion-Slurry,” J. Membrane Sci. , 318 (1-2), 56-64 (2008)

The to-be-separated mixture 5a receives the following effects in the crystal filtration layer 6a.
When the separated mixture 5a is a liquid-liquid mixture,
A low viscosity solution (such as an aqueous solution) in the liquid-liquid mixture passes between the crystals of the crystal filtration layer 6a and through the holes in the crystal filtration layer support wall, and is discharged out of the crystal filtration layer support wall. It is trapped in the crystal filtration layer. Here, the low-viscosity solution and the high-viscosity solution 8b are a solution in a liquid-liquid mixture and a non-solution body, which are a low-viscosity solution and a high-viscosity solution 8b in the comparison of the viscosities.
In the filtration of a solution, it is well known that the ability of trapping the solution in the filtration layer (the reciprocal of the permeation flow rate per unit time) is proportional to the viscosity of the solution (for example, Non-Patent Document 4 and Non-Patent Document 4). Reference 5 (refer to P. 73-78, 99-123). Therefore, the present invention provides a method and apparatus suitable for separating the high viscosity solution 8b and the low viscosity solution. In particular, in oil-containing solutions such as natural products (a mixture of fats and aqueous solutions), the viscosity of oil generally increases remarkably as the temperature decreases (solidifies as the temperature decreases). On the other hand, the aqueous solution has a slow increase in viscosity due to lowering of temperature. Therefore, a low temperature oil-containing solution such as a natural product has a viscosity difference between the solution and the non-solution body, and becomes a separated mixture 5a that is favorable for application to the present invention.
On the other hand, when the separated mixture 5a is a solid-liquid mixture,
The liquid in the solid-liquid mixture passes through the pores of the crystal filtration layer and the crystal filtration layer support wall, is discharged out of the crystal filtration layer support wall, and the solid matter is captured by the crystal filtration layer. Furthermore, when the liquid in the solid-liquid mixture is composed of a solution and a non-solution body in the same manner as the liquid-liquid mixture described above, a high viscosity solution may be trapped in the crystal filtration layer depending on the use of the present invention, and not trapped. There is also.
Furthermore, the present invention aims to separate a plurality of non-solution bodies in a liquid-liquid and solid-liquid mixture by the same principle as in the case of the above-mentioned liquid-liquid mixture (due to the difference in viscosity between non-solution bodies). You may use as a method and an apparatus which isolate | separate a large solution and a solution with small viscosity.
In the invention, a solution or a non-solution body may be added to the mixture to be separated before separation (in this case, the mixture to be separated may contain a solid substance). In addition, this liquid addition thing is not limited to the component substance of a to-be-separated mixture. In the treatment by adding the liquid to the mixture to be separated, the separation efficiency may be lowered or not changed in the separation plate centrifugal method (see page 1, lines 15 to 27). This is because the separation plate centrifugal method increases the residence time of the solution in the centrifugal force field due to the increase in the solution of the mixture to be separated, or the non-solution, or the fine particles (solution, non-solution and solids) in the non-solution. This is considered to be the cause. In the case of such a mixture to be separated, the application of the present invention by adding liquid is suitable.
Moreover, even if a centrifugal separation method is used as the separator 6, the present invention does not require high-speed rotation as compared with a separation plate centrifugal separation method (see the first page, lines 15 to 27). The reason is that the separation principle (utilization of centrifugal force) in the separator of the present invention is mainly due to the difference in permeability between the solid-liquid and liquid-liquid filtration layers (granule / droplet (emulsion, etc.) gathering effect. On the other hand, it is because the separation principle (use of centrifugal force) in the separation plate type centrifugal separation method requires a specific gravity difference. The low-speed rotation can reduce the strength of the material and structure of the centrifuge, increase the size of the centrifuge (allowing a large amount of processing), and reduce the cost.
3) Through the above operation, the passing liquid 7a of the crystal filtration layer support wall is collected in the passing liquid tank 7, and the crystal filtration layer 6a and the trapped substance (large viscosity solution 8b and solid matter) of the crystal filtration layer are the melting tank. Collect in 8. The crystal filtration layer is melted in the melting tank 8 (hereinafter, the melt of the crystal filtration layer is used as a melt).
Separation of the mixture in the melting tank (separation of melt and high viscosity solution (and solids)) can be done by static separation (separation by specific gravity difference), separation plate centrifugal method, cylindrical centrifugal method, decanter It can be carried out by a mold separation method, membrane, filtration, coalescer or the like.
Furthermore, this method is accompanied by the effect of collecting particles and droplets in the mixture 5a to be separated in the filtration layer (as described above), and a part of the aggregate is mixed into the passing liquid 7a. For this reason, a stationary separation method, a separation plate type centrifugal separation method, a cylindrical centrifugal separation method, and the separation of the mixture in the passage liquid tank 7 or the mixture obtained by mixing the mixture in the passage liquid tank and the mixture in the melting tank 8; A decanter type separation method or a membrane, filtration, coalescer, or the like may be used. The size of the aggregate of particles / drops varies depending on the degree of the aggregation, and the larger aggregate is more easily captured by the filtration layer.
The melt, small viscosity solution and large viscosity solution separated by the above-described various separation techniques include the large viscosity solution, the low viscosity solution, the solid matter and the mixture thereof in the mixture to be separated (by the use of the present invention ( Including other means before and after that) may be incorporated in an amount (to the extent that the user's purpose is achieved).
The separated melt may be used as the stock solution 1a of the filter crystal generator 2 (reuse). In this case, energy for replenishing the stock solution 1a to the stock solution tank 1 and cooling (or warming) the stock solution 1a, and draining treatment of the melt, etc. are reduced, and a low-cost, energy-saving method and apparatus are provided. Become. In addition, the reuse of the melt reduces the cost of the filter material for replacing the filter medium and the cost for disposal (disposal) of the filter medium after use, as compared with the conventional filtration method.
Furthermore, in the re-use of this melt into the stock solution 1a, the generation of filter crystals by vaporization of the stock solution (in the filter crystal generator) (page 4, line 23 to page 5, line 7) is performed in the melt. It will have the advantage of preventing contamination of the high viscosity solution, the solute in the low viscosity solution and the solid matter into the filter crystal, and vaporization at a low temperature will further prevent the vaporization and contamination thereof.
As described above, the present invention is a method of separating the filter medium and the captured object by melting the filter medium. For this reason, the method has the following advantages.
{Circle around (1)} Separation of the trapping material (filter material or membrane material) and the trapped substance becomes easy, and high separation efficiency can be obtained (in the separation described on the left). For this reason, it becomes possible to use the trapped substance as a separation target substance.
(2) It is not necessary to clean the filter media for regenerating the filter media.
(3) Resolve the pollution problem of filter media disposal (when reusing the melt or making the filter medium a non-polluting substance such as ice).
In addition, in many cases, the present invention is a low-cost method compared to the case where water, an aqueous solution, or an organic solvent is used to recover an object to be captured from a capture material by using existing filtration and membrane technology (see 3 above). Page 18-26). This is because the heat energy necessary for the present invention (melting and solidifying latent heat of the filter medium) is generally smaller than the heat energy required for the existing filtration and membrane technology (latent heat of evaporation and a large amount of cleaning liquid, etc.). . For example, water has a latent heat of evaporation of about 560 Kcal / Kg and a latent heat of solidification of about 80 Kcak / Kg.
The present invention may be carried out in a low temperature environment where the target substance 5a in the mixture to be separated is not subject to denaturation or oxidation due to temperature.
Further, the present invention provides a batch-type separation target mixture 5a in which the above-described components (filter crystal generator 2, separator 6 and melting tank 8) are not repeatedly operated for research, experiment and demonstration purposes. You may use as a processing method and an apparatus.
In the present invention, the filter medium (filter crystal) of the present invention may be used as a filter aid (body feeding method and pre-coating method).
Note that US Patents (Patent Documents 5 and 6) describe a technique in which a solid-liquid mixture or liquid passes through a layer formed of ice crystals. Further, Patent Document 5 describes a centrifugal dehydration method in which an ice crystal layer is formed using a rotating basket described in the best mode for carrying out the present invention. In addition, it is described that spherical ice crystals are formed by increasing the residence time by slow freezing, and that fine ice crystals are formed by shortening the residence time by rapid freezing. Moreover, the said patent document 6 is a technique which isolate | separates an ice crystal and solidified WAX from Oil.
U. S. PAT. 3845230, 10/1974, 426/384 U. S. PAT. 3320153, 5/1967, 208/33

As described above, the present invention provides a method and apparatus having the following effects.
Separation of emulsions and suspensions because the technology is filtration (especially natural products, fatty acids, monoglycerides, etc. have a surface-active effect, and fats and oils, etc. are refined), and solid-liquid and liquid-liquid mixtures with small specific gravity difference Separation is possible.
In the present invention,
{Circle around (1)} It is possible to recover the solid matter and liquid trapped in the trapping material.
(2) It is not necessary to clean the filter media for regenerating the filter media.
(3) Resolve the pollution problem of filter media disposal (when reusing the melt or making the filter medium a non-polluting substance such as ice).
Furthermore, in the present invention, when the filter medium is ice (which may be artificial snow or natural snow), the following advantages are obtained in addition to the above.
(1) There is no problem of harmfulness due to mixing of the filter material into the separated product after separation.
(2) New production of filter media is easy.
(3) Deterioration (oxidation / denaturation) of the target substance can be prevented (because of the low temperature).

FIG. 1 is a process diagram showing an embodiment of the present invention. In FIG. 1, separation after the trapped crystal filtration layer is melted is a stationary separation method in the case of a liquid-liquid mixture. Moreover, the case where the melt 8a in the stationary separation method is reused as a stock solution is indicated by a dotted line.
FIG. 2 is a schematic diagram of a cooling plate type in a filter crystal generator.
FIG. 3 is a cross-sectional schematic diagram showing the operation of the separator of the filter cloth reversal type.

1 Stock solution tank 1a Stock solution 2 Filter crystal generator (Process 1)
DESCRIPTION OF SYMBOLS 21 Cooling plate type filter crystal generator 211 Cooling plate 212 Vaporizer 213 Raw material vaporized 214 Scraping device 215 Filter crystal discharge 221 Refrigerator 222 Refrigerant or heat medium 2a Filter crystal 5 Separation mixture tank 5a Separation mixture 6 Separator (Process 2)
61 Filter cloth reversing type separator 611 Rotating hole wall basket 612 Filter cloth 6a Crystal filtration layer 6b Capture crystal filtration layer (crystal filtration layer, large viscosity solution and solid substance trapped in the crystal filtration layer, etc.)
7 Passing liquid tank 7a Passing liquid 8 Melting tank (Process 3)
8a Melting solution 8b High viscosity solution a: Filter crystal supply step b: Separation mixture supply step c: Capture crystal filtration layer discharge step

As the filter crystal generator 2 of the present invention, there are devices such as a spray water type, an ice powder type, a cooling plate type, and a membrane type in addition to the rotating cylindrical type and cylindrical internal scraping type described in Patent Document 7.
Further, the separator 6 of the present invention includes devices such as an extrusion plate type, a screw type, a filter cloth reversal type, an automatic batch type, a conical basket type, and a bottom discharge type described in Patent Document 7.
PCT / JP2007 / 074330

In the present invention, the combination of the filter crystal generator 2 and the separator 6 of the present invention may be any combination of the filter crystal generator 2 and the separator 6 described above (and below).
Hereinafter, an embodiment of the present invention will be described in the case where the filter crystal generator 2 is a cooling plate type 21 (FIG. 2) and the separator 6 is a filter cloth inversion type 61 (FIG. 3).
The cooling plate type filter crystal generator 21 is basically composed of a vaporizer 212, a cooling plate 211 and a scraping device 214. The filter cloth reversing type separator 61 is basically composed of a rotating hole wall basket 611 and a filter cloth 612 mounted inside the hole wall basket 611.
The operation of the above configuration will be described.
Cooling plate type filter crystal generator 21
The stock solution 1a from the stock solution tank 1 is sent to a vaporizer 212 (which may be a vaporization other than heating). The stock solution is vaporized in the vaporizer 212, the vaporized product (water vapor or the like) is guided to the cooling plate 211, and crystals are generated on the surface of the cooling plate. A refrigerant or a heat medium flows through the back surface of the cooling plate surface. The crystals formed on the surface of the cooling plate are continuously peeled from the surface of the cooling plate by the scraping tool 214 close to the surface of the cooling plate. The peeled crystal becomes the filter crystal 2a.
The shape and the size of the filter crystal 2a generated by the cooling plate type filter crystal generator are the temperature of the cooling plate 211, the supply amount / speed of vaporized material to the cooling plate, the scraping speed of the scraping tool 214, etc. This can be done by adjusting.
Filter cloth reversing type separator 61
(A) The filter crystal 2a from the filter crystal generator 2 is put into a filter cloth 612 mounted inside the rotating hole wall basket 611 (the filter cloth rotates together with the basket). A crystal filtration layer 6a using the filter crystal 2a as a filter material is formed by a rotational centrifugal force.
(B) The mixture 5a to be separated is supplied to the surface of the formed crystal filtration layer 6a. In the supplied mixture 5a to be separated, the low-viscosity solution passes through the crystal filtration layer and the basket wall hole (passage liquid 7a), and the high-viscosity solution 8b and the solid matter are captured by the crystal filtration layer.
(C) Stop supplying the mixture to be separated. Thereafter, the filter cloth 612 is reversed (turned over), and the trapped crystal filtration layer 6b (the crystal filtration layer, the large viscosity solution 8b trapped in the crystal filter layer, solids, etc.) is peeled from the filter cloth 612. The separated trapped crystal filtration layer 6b is dropped and discharged from the bottom of the separator.
In this separator, in order to increase the separation efficiency and separation amount of the target product, the supply amount and supply speed of the filter crystal 2a and the mixture to be separated 5a, and the rotation speed and rotation time of the rotating hole wall basket are adjusted. Do.
Further, the supply of the filter crystal 2a and the mixture to be separated 5a to the separator may be common in the supply pipe, but is preferably separate.
Through the operation of the separator, etc., the passing liquid 7a on the support wall of the crystal filtration layer is collected in the pass liquid tank 7, and the crystal filtration layer and the trapped substances (such as high viscosity solution and solid matter) of the crystal filtration layer are melted. Collect in tank 8. The crystal filtration layer is melted in the melting tank 8.

  The present invention is suitable when the filter crystal is ice and the mixture to be separated is a natural product (a mixture of oil and aqueous solution). Useful components separated from natural products are often harmless to animals (human body, etc.) and plants (compared to chemical compounds), and their use is rapidly expanding.

Claims (5)

a) A filter crystal that does not require a liquid removal step to be used as a filter medium as it is from the stock solution is produced,
b) forming a crystal filtration layer by the filter crystal, supplying a mixture to be separated to the surface of the formed crystal filtration layer, and a substance to be captured that is captured by the crystal filtration layer; Separated into a filtrate passing through the pores of the filtration layer and the crystal filtration layer support wall,
c) Collecting the crystal filtration layer and the trapped material captured by the crystal filtration layer, melting the crystal filtration layer to form a crystal filtration layer melt, and separating the crystal filtration layer and the trapped material ;
d) reusing the crystal filtration layer melt as a stock solution;
A method for producing a separated product from the separated mixture. a) vaporizing the stock solution to produce filter crystals;
b) forming a crystal filtration layer by the filter crystal, supplying a mixture to be separated to the surface of the formed crystal filtration layer, and a substance to be captured that is captured by the crystal filtration layer; Separated into a filtrate passing through the pores of the filtration layer and the crystal filtration layer support wall,
c) Collecting the crystal filtration layer and the trapped substance trapped in the crystal filtration layer, melting the crystal filtration layer to separate the crystal filtration layer and the trapped substance as a crystal filtration layer melt,
A method for producing a separated product from the separated mixture. a) The stock solution is atomized to produce filter crystals,
b) forming a crystal filtration layer by the filter crystal, supplying a mixture to be separated to the surface of the formed crystal filtration layer, and a substance to be captured that is captured by the crystal filtration layer; Separated into a filtrate passing through the pores of the filtration layer and the crystal filtration layer support wall,
c) Collecting the crystal filtration layer and the trapped material captured by the crystal filtration layer, melting the crystal filtration layer to form a crystal filtration layer melt, and separating the crystal filtration layer and the trapped material ;
d) reusing the crystal filtration layer melt as a stock solution;
A method for producing a separated product from the separated mixture. a) generating powdery filter crystals from the stock solution,
b) forming a crystal filtration layer by the filter crystal, supplying a mixture to be separated to the surface of the formed crystal filtration layer, and a substance to be captured that is captured by the crystal filtration layer; Separated into a filtrate passing through the pores of the filtration layer and the crystal filtration layer support wall,
c) Collecting the crystal filtration layer and the trapped material captured by the crystal filtration layer, melting the crystal filtration layer to form a crystal filtration layer melt, and separating the crystal filtration layer and the trapped material ;
d) reusing the crystal filtration layer melt as a stock solution;
A method for producing a separated product from the separated mixture. a) producing crystals from the stock solution;
b) crushing the crystals to make filter crystals,
c) Forming a crystal filtration layer by the filter crystal, supplying a mixture to be separated to the surface of the formed crystal filtration layer, and a substance to be captured that is captured by the crystal filtration layer, and the crystal Separated into a filtrate passing through the pores of the filtration layer and the crystal filtration layer support wall,
d) Collecting the crystal filtration layer and the trapped substance trapped in the crystal filtration layer, melting the crystal filtration layer to separate the crystal filtration layer and the trapped substance as a crystal filtration layer melt,
A method for producing a separated product from the separated mixture.

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