KR20160063505A - Purifying container and purifying method - Google Patents

Abstract

Provided are a purifying container and a purifying method for separating ionic liquid including a crystallized organic material and an impurity after inducing crystallization of the organic material under constant temperature and atmosphere after combining the organic material into the ionic liquid by integrally forming the purifying container. The purifying container comprises: a case which includes a body having a hollow hole, and a filter coupled to be detachable from the body; a first cap which can be coupled to one side of the body; and a second cap which can be coupled to the other side of the body. The first cap includes: a coupling unit composed of a first material; and a heat transfer unit which can be coupled to the coupling unit, and is composed of a second material having heat conductivity greater than that of the first material.

Description

[0001] PURIFYING CONTAINER AND PURIFYING METHOD [0002]

The present invention relates to a purification vessel and a purification method, and more specifically, relates to a purification vessel and a purification method for purifying a conductive organic material.

Recently, electronic devices using organic materials have been increasing. For example, organic materials have been used for organic light-emitting diodes (OLEDs), organic semiconductor devices, and organic photoelectric conversion devices.

In the organic material, a considerable amount of impurities such as unreacted materials and intermediates remain in the course of its synthesis. When an organic material having such a low purity and containing such impurities is used as it is in the production of an organic electronic device, the device performance is adversely affected. To at least 99%, preferably at least 99.5%.

Generally, a method of purifying a solid is a method of dissolving a solid in a solvent at a high temperature and then recrystallizing at a low temperature. However, in the case of a conductive organic material, a soluble solvent is limited and the solubility is very low. Further, the solvent should not volatilize under high-temperature vacuum, and the heat capacity should be large. It is very difficult to find an appropriate solvent because there is no possibility that impurities are contained due to reaction with the solvent in the purification process.

Currently, the sublimation purification method disclosed in H.J. Wagner, el al., Journal of Materials Science, 17, 2781 (1982) is the only practical method for mass purification of organic materials of high purity at a practicable level. The sublimation purification method is a purification method using a difference in sublimation point between an organic material and impurities contained therein. In the sublimation purification method, an organic material disposed at one longitudinal end portion in a tube maintained in a vacuum state is heated to a sublimation point or higher, The organic material is cooled and recrystallized in the other end region in the longitudinal direction, thereby obtaining an organic material of high purity from which impurities have been removed. If a temperature gradient is formed in the longitudinal direction of the tube by using a plurality of heaters disposed outside the tube, the position where the organic material and the impurities contained therein are recrystallized is different, so that the organic material and the impurities can be separated .

However, according to the sublimation purification method, the recrystallized and purified organic material is deposited on the inner wall of the tube. Therefore, it is necessary to manually scrape off the organic material. In general, the difference in sublimation point between the organic material and the impurity is not sufficiently large, Therefore, a single high-purity organic material can not be obtained by a single process, and the process is complicated and takes a long time, for example, the same process must be repeated three times or more. In addition, a significant amount of organic material is lost without being deposited on the inner wall of the pipe due to the pumping operation by the vacuum pump connected to the other longitudinal end of the pipe and the flow of the inert gas flowing into the pipe for controlling the atmosphere. In addition, it is difficult to prevent the loss of the organic material even in the process of collecting the organic material deposited on the inner wall of the pipe so as not to mix with the impurities. Therefore, the amount of the organic material purified through the sublimation purification method is only about 60 to 70% of the amount of the organic material before purification. In addition, due to the nature of the meteorological method, high temperature, high vacuum, and long process time are required. In order to mass-purify, the sublimation purifier must be enlarged. Therefore, the purification efficiency is limited. There is a problem that a long period of process and equipment optimization is required until it is obtained. That is, the sublimation purification method has problems such as inconvenience during harvesting, long purification time, loss of organic materials during purification, low purification efficiency, and difficulty in process and equipment optimization.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a method of manufacturing an organic thin film transistor, And to provide a tablet vessel and a tabletting method for separating a sex liquid.

A tablet vessel according to an embodiment of the present invention includes a case including a hollow body and a filter detachably coupled to the body, a first cap that can be coupled to one side of the body, And the first cap includes a heat transfer portion formed of a first material and a heat transfer portion coupled to the heat transfer portion and made of a second material having a thermal conductivity higher than that of the first material.

The present invention also has another aspect called a purification method. The purification method according to an embodiment of the present invention includes the steps of supplying and mixing the pre-purification organic material and the ionic liquid, crystallizing the mixed organic material by changing the temperature of the ionic liquid, Separating the organic material from the ionic liquid, and recovering the separated organic material, wherein the mixing, crystallizing, separating, and recovering steps are performed in the same purification vessel.

The present invention relates to a purification vessel for separating an organic material and an ionic liquid containing impurities after inducing crystallization of an organic material at a constant temperature and atmosphere after an organic material is mixed into an ionic liquid, .

1 is a view for explaining a tablet vessel according to an embodiment of the present invention,
2 is a view for explaining a tablet vessel according to another embodiment of the present invention,
FIG. 3 is a flow chart for explaining a purification method according to an embodiment of the present invention,
FIG. 4 is a flow chart for explaining steps of separating a purification method according to an embodiment of the present invention; FIG.
FIG. 5 is a flow chart for explaining steps of recovering a purification method according to an embodiment of the present invention; FIG.
FIG. 6A is a view for explaining how a tablet vessel according to an embodiment of the present invention stores an organic material before purification and an ionic liquid; FIG.
FIG. 6B is a view for explaining that a tablet vessel according to an embodiment of the present invention stores an ionic liquid containing an organic material; FIG.
7 is a view for explaining that a tablet vessel according to an embodiment of the present invention stores an ionic liquid containing a crystallized organic material and an impurity;
FIG. 8 is a view for explaining a separation step of a purification method according to an embodiment of the present invention; FIG.
FIGS. 9A and 9B are diagrams for explaining steps of recovering a purification method according to an embodiment of the present invention;
FIGS. 10A and 10B are views for explaining the molecular structure of an ionic liquid which can be used in a purification apparatus according to an embodiment of the present invention. FIG.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings. Like reference numerals throughout the specification denote substantially identical components. In the following description, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The names of components used in the following description are selected in consideration of ease of specification, and may be different from actual product names.

1 is a view for explaining a tablet vessel according to an embodiment of the present invention. Referring to FIG. 1, a tablet vessel 1000 according to the present invention includes a case 1100, a first cap 1200, and a second cap 1300.

The case 1100 includes a hollow body 1110, a filter 1120 detachably coupled to the body 1110, and an organic material recovery member 1130 detachably coupled to the inner peripheral surface of the body 1110 do. The pre-purification organic material S1 and the ionic liquid L1 are supplied and mixed in the hollow of the body 1110. [ The ionic liquid L2 containing the organic material generated in the mixing step is not shown in FIG. 1 but will be described with reference to FIG. 6B. In the step of crystallizing, an ionic liquid (L3) containing a crystallized organic material (S2) and an impurity is produced. The filter 1120 separates the crystallized organic material S2 from the impurity-containing ionic liquid L3. The size of the plurality of holes included in the filter 1120 may be set smaller than the particle size of the crystallized organic material S2 and larger than the particle size of the ionic liquid L3 containing impurities. The organic material recovery member 1130 recovers the crystallized organic material S2 adhered to the inner peripheral surface of the body 1110 in the step of crystallizing. The organic material collecting member 1130 may be a sheet paper or the like. The organic material recycling member 1130 is separated from the body 1110 after the organic material S2 is separated from the ionic liquid L3 containing the impurity. The crystallized organic material S2 when a physical force is applied to the crystallized organic material S2 attached to the organic material recycling member 1130 (for example, when scraped) . ≪ / RTI >

The first cap 1200 can be coupled to one side of the body 1110 and includes a coupling part 1210 made of a first material and a heat transfer part 1220 made of a second material. The second material has a higher thermal conductivity than the first material. The coupling portion 1210 is designed to be coupled to one side of the body 1110. Since the heat transfer part 1220 is made of a material having a high thermal conductivity, the heat transfer part 1200 exchanges heat between the inside of the case 1100 and the outside of the case 1100 to change the temperature of the material stored in the case. When the first cap 1200 is separated from the body 1110, since the filter 1120 is exposed to the outside, the ionic liquid L3 containing impurities can be discharged to the outside through the filter 1120 , The crystallized organic material S2 may remain in the body.

The second cap 1300 may be coupled to the other side of the body 1110 and includes a gas supply unit 1310. The gas supply unit 1310 supplies the gas G to the body 1110. The gas G is selected as a material which does not chemically react with the ionic liquid L1 so that the ionic liquid L1 in contact with the substrate G is not oxidized or discolored even when heated. In addition, a step 1320 may be formed in the second cap 1300. The amount of the crystallized organic material S2 adhered to the second cap 1300 decreases because the area in contact with the ionic liquid L1 due to the step 1320 decreases. Although only the step 1320 is shown in FIG. 1, the second cap 1300 may be provided with a curved surface for reducing the contact area with the ionic liquid L1. In the case of the second cap 1300, an organic material recovery member (not shown) may be detachably coupled to the inside for recovery of the organic material. The amount of the organic material to be lost by the second cap 1300 is reduced, so that the amount of the recovered organic material is increased.

In the case of the tablet vessel described with reference to Fig. 1, the second cap 1300 must be separated from the body 1110 in order to introduce the pre-purification organic material S1 or the ionic liquid L1, In order to discharge the ionic liquid L3, the first cap 1200 must be separated from the body 1110. [ In the purifying vessel 1000, the pre-purification organic material S1 and the ionic liquid L1 can be supplied and mixed, and the crystallized organic material S2 and the ionic liquid L3 containing impurities are generated And the crystallized organic material S2 can be separated from the ionic liquid L3 containing impurities and the crystallized organic material S2 can be recovered.

2 is a view for explaining a tablet vessel according to another embodiment of the present invention. Referring to FIGS. 1 and 2, a tablet vessel 2000 according to the present invention includes a case 2100, a first cap 2200, and a second cap 2300. Since the case 2100 is the same as the case 1100, detailed description may be omitted. Since the gas supply unit 2310 and the step 2320 are the same as the gas supply unit 1310 and the step 1320, detailed description may be omitted.

The first cap 2200 further includes a fluid discharge portion 2230 and discharges the ionic liquid L3 and the gas G containing the impurities in the case 2100 to the outside. The fluid discharge portion 2230 includes a valve (not shown), and the filter 2120 can be exposed to the outside only when a valve (not shown) is opened.

The second cap 2300 further includes an organic material supply portion 2330 and an ionic liquid supply portion 2340. The organic material supply unit 2330 supplies the pre-purification organic material S1 into the case 2100 and the ionic liquid supply unit 2340 supplies the ionic liquid L1 into the case 2100.

2, the pre-purification organic material S1 and the ionic liquid L1 can be introduced into the case 2100 even when the second cap 2300 is coupled to the body 2110 When the first cap 1200 is coupled to the body 1110, if the valve (not shown) is opened, the filter 2120 is exposed to the outside, so that the ionic liquid L3 containing the impurities can be discharged to the outside .

3 is a flowchart illustrating a purification method according to an embodiment of the present invention. Hereinafter, description will be made with reference to Figs. 1 to 10B.

In step S100, the pre-purification organic material S1 and the ionic liquid L1 are supplied into the case 1100. Referring to FIG. 6A, the second cap 1300 is separated from the body 1110, and the first cap 1200 is coupled to the body 1110. The preliminary organic material S1 and the ionic liquid L1 flow into the body 1110 and are stored by the first cap 1200. [ In the case of the tablet vessel 2000 described with reference to FIG. 2, the pre-purification organic material S1 is supplied into the case 2100 through the organic material supply portion 2330, and the ionic liquid L1 is supplied into the ionic liquid And is supplied into the case 2100 through the supply part 2340. [ The embodiment shown in Fig. 6A shows the pre-purge organic material S1 and the ionic liquid L1 before mixing.

After the pre-purification organic material S1 and the ionic liquid L1 are supplied, the pre-purification organic material S1 and the ionic liquid L1 are mixed. Referring to FIG. 6B, it can be confirmed that an ionic liquid L2 containing an organic material is generated by mixing the pre-purification organic material S1 and the ionic liquid L1. For mixing, the pre-purification organic material S1 and the ionic liquid L1 may be exposed to external physical forces or temperature changes. The external physical force can be shaken by an ultrasonic stirrer, an orbital shaker or a stirrer. As for the temperature change, heating or cooling is possible. External physical forces or temperature changes may be performed selectively and may be performed together. If performed together, they may be performed concurrently or stepwise. In the case of a temperature change, the heating section H can supply heat to the tablet vessel 1000. Since the heat transfer portion 1220 is made of a material having a high thermal conductivity, heat generated by the heating portion H is supplied to the pre-purification organic material S1 and the ionic liquid L1. When the temperatures of the organic material S1 before the purification and the temperature of the ionic liquid L1 are mixed with each other, the mixing mechanism is not limited to one. The dominant crystallization mechanism may vary depending on the combination of the conductive organic material and the ionic liquid, process conditions such as temperature, pressure, atmosphere, etc., even within the scope of the present invention. For example, the pre-purification organic material S1 may be melted by heating, and the pre-purification organic material S1 may be dissolved in the ionic liquid L1. That is, it should be understood that the present invention encompasses all cases where the conductive organic material is mixed with the ionic liquid by external physical force or temperature change. The gas G may be supplied into the case 1100 while being heated. The second cap 1300 can be coupled to the body 1110 after the organic material S1 before the purification and the ionic liquid L1 are supplied and the body G can be coupled to the body 1110 through the gas supply unit 1310. [ 1110). Since the ionic liquids L1 and L2 do not react with the gas G, they are not discolored or oxidized even when heated.

In step S200, an organic material S2 crystallized in the body 1110 and an ionic liquid L3 containing an impurity are generated. Referring to FIG. 7, the mixed organic material and the ionic liquid may be maintained at a first temperature and then at a second temperature. The first temperature may be a temperature above the minimum temperature at which the molecular structure changes and the second temperature may be the temperature at which the organic material crystallizes. 7, the heating by the heating unit H is interrupted and does not come into contact with the other temperature changing means. However, the heating unit H may be continuously heated, and may be rapidly cooled by the cooling unit (not shown) It is possible. Since the heat transfer portion 1220 is made of a material having a high thermal conductivity, the temperature of the crystallized organic material S2 and the ionic liquid L3 containing the impurities are smoothly changed. During the crystallizing step, a part of the crystallized organic material S2 produced is adhered to the filter 1120 or the organic material recycling member 1130.

The formation of the crystallized organic material S2 is carried out by a so-called solution crystallization mechanism in which the conductive organic material dissolved in the ionic liquid at high temperature is precipitated in the course of cooling at a low temperature, or a so- Melt crystallization mechanism. That is, it should be understood that the present invention encompasses all cases in which the conductive organic material mixed in the ionic liquid is crystallized. The conductive organic material crystals purified to a high purity of about 99.5% can be obtained only by performing the step S200.

In step S300, the crystallized organic material S2 is separated from the ionic liquid L3 containing impurities. Referring to FIG. 8, the first cap 1200 is separated from the body 1110, and the filter 1120 is exposed to the outside. Since the gas G is supplied from the gas supply unit 1310, the ionic liquid L3 containing the impurities and the crystallized organic material S2 are pressurized to the outside. The ionic liquid (L3) containing the impurities is discharged through the filter (1120) by pressurization. The crystallized organic material S2 can not pass through the filter 1120 even if it is pressurized and is collected around the filter 1120. [ Thus, the crystallized organic material S2 is separated from the ionic liquid L3 containing the impurity. In the embodiment described with reference to FIG. 2, the filter 2120 may be exposed to the outside due to the opening of the valve (not shown), with the first cap 2200 coupled to the body 2110. The ionic liquid L3 containing the impurities can be discharged to the outside through the fluid discharge portion 2230. [

In step S400, the crystallized organic material S2 is recovered. Since the purity is high, the determined organic material S2 is usable again.

Steps S100 to S400 are performed in the same purification vessel 1000, 2000. Therefore, there is no loss due to the movement of the organic material, and the space consumption is reduced.

FIG. 4 is a flow chart for explaining steps of separating the purification method according to an embodiment of the present invention.

In step S310, the filters 1120 and 2120 are exposed to the outside. In the case of the filter 1120, since the first cap 1200 is separated from the body 1110, the filter 1120 is exposed to the outside, and in the case of the filter 2120, the valve (not shown) (2120) is exposed to the outside.

In step S320, the crystallized organic material S2 and the ionic liquid L3 containing impurities are pressed to the outside. The ionic liquid (L3) containing the impurities is discharged through the filter (1120) by pressurization. The crystallized organic material S2 can not pass through the filter 1120 even if it is pressurized and is collected around the filter 1120. [

FIG. 5 is a flow chart for explaining steps of recovering a purification method according to an embodiment of the present invention.

In step S410, the filter 1120 is separated from the body 1110, and the crystallized organic material S2 collected in the filter 1120 is recovered. 2, the first cap 2200 is detached from the body 2100, the filter 2120 is detached from the body 2110, and the crystallized organic material collected in the filter 1120 S2 are retrieved.

In step S420, the crystallized organic material S2 formed on the inner peripheral surface of the body 1110 is recovered. The crystallized organic material S2 can be smoothly recovered by wrapping the inner peripheral surface of the body 1110 with another member. Referring to FIGS. 1 and 9A, an organic material recycling member 1130 is detachably coupled to an inner peripheral surface of a body 1110. Accordingly, in step S200, the crystallized organic material S2 is formed on the organic material recovery member 1130, not on the inner peripheral surface of the body 1110. [ In step S420, the organic material recycling member 1130 is separated from the body 1110, and the crystallized organic material S2 collected in the organic material recycling member 1130 is recovered. Alternatively, the crystallized organic material S2 formed on the inner peripheral surface of the body 1110 may be directly recovered. 9B, an organic material recovery piston 1400 designed to correspond to the inner circumferential surface of the body 1110 is brought into contact with the inner circumferential surface of the body 1110. By the piston motion, the crystallized organic material S2 formed on the inner peripheral surface of the body 1110 is separated from the body 1110. [ The recovered organic material may be recycled together with the recovered crystallized organic material S2 in step S410.

FIGS. 10A and 10B are views for explaining the molecular structure of an ionic liquid which can be used in the method of treating an organic material according to an embodiment of the present invention.

Ionic liquids are ionic salts composed of ionic organic cations and inorganic anions. They exist in a liquid state (room temperature ionic liquid) at temperatures below 100 ° C. They have a wide range of melting, usually asymmetric cations and smaller anions As a salt, FIG. 10A is a view for explaining a cation portion of a molecular structure of an ionic liquid which can be used in a purification apparatus according to an embodiment of the present invention. FIG.

Referring to FIG. 10a, the cation moiety may be selected from the group consisting of tetraalkylammonium, dialkylimidazolium, trialkylimidazolium, tetraalkylimidazolium, alkylpyridinium ( At least one selected from the group consisting of Alkylpyridinium, Dialkylpyrrolidinium, Dialkylpiperidinium, Tetraalkylphosphonium and Trialkylsulfonium can be selected from the group consisting of Alkylpyridinium, Dialkylpyrrolidinium, Dialkylpyrrolidinium, Dialkylpiperidinium, Tetraalkylphosphonium and Trialkylsulfonium. Anionic portion is _{^{Cl -, Br -, NO 3}} -, BF 4 -, PF 6 -, AlCl 4 -, Al 2 Cl 7 -, AcO -, CH 3 COO -, CF 3 COO -, CH 3 SO 3 -, ^{_{CF 3 SO 3 -, (CF}} 3 SO 2) 2 N -, (CF 3 SO 2) 3 C -, (CF 3 CF 2 SO 2) 2 N -, C 4 F 9 SO 3 -, C 3 F 7 ^{_{COO -, (CF 3 SO 2}} ) (CF 3 CO) N -, C 4 F 10 N -, C 2 F 6 NO 4 S 2 -, C 2 F 6 NO 6 S 2 -, C 4 F 10 NO 4 S ₂ ^- , CF ₃ SO ₂ ^- , C ₄ F ₉ SO ₂ ^- , C ₄ F ₉ SO ₃ ^- , C ₂ H ₆ NO ₄ S ₂ ^- , C ₃ F ₆ NO ₃ S ^- and CH ₃ CH (OH may be selected at least one from the group consisting of ^-) CO _2.

The ionic liquid has a low melting point due to its structural characteristics and has a very low vapor pressure and is present as a stable liquid in a wide temperature range. In addition, it is excellent in thermal stability and ionic conductivity, can dissolve various organic, inorganic and polymeric substances having hydrophilic and hydrophobic properties, is low in volatility, low in flammability, and low in explosibility, thus being environmentally friendly.

FIG. 10B is a view for explaining two of the molecular structures of the ionic liquid that can be used in the purification apparatus according to one embodiment of the present invention. FIG. The ionic liquid may be appropriately selected according to the conductive organic material to be purified, and in particular, an imidazolium-based ionic liquid having a long alkyl substituent is particularly suitable as the ionic liquid of the present invention. In Figure 10b, the cationic moiety is 1-octyl-3-methylimidazolium or 1-butyl-3-methylimidazolium in DiAlkylimidazolium, and the anion moiety is triflouromethylsulfonyl Imide ((CF ₃ SO ₂ ) ₂ N ^- ) is possible. 10B shows a case where the cation portion is 1-octyl-3-methyl imidazolium and the anion portion is tri-fluoromethylsulfonyl imide. In the lower portion of FIG. 10B, the cation portion is 1-butyl -3-methylimidazolium, and the anion moiety is tri-fluoromethylsulfonylimide.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. It can be implemented.

The scope of the present invention is defined by the appended claims, and all differences within the scope of the claims are to be construed as being included in the present invention.

1100, 2100: Case 1200, 2200: first cap 1300, 2300: Second cap

Claims (13)

A case including a body having a hollow and a filter detachably coupled to the body;
A first cap that can be coupled to one side of the body;
And a second cap that can be coupled to the other side of the body,
Wherein the first cap includes a heat transfer portion that is made of a first material and a second material that can be coupled to the first portion and has a thermal conductivity higher than that of the first material. The method according to claim 1,
The heat exchanger exchanges heat with the outside to change the temperature of the material stored in the hollow,
Wherein said material comprises at least one of an organic material and an ionic liquid. The method according to claim 1,
And the second cap has a gas supply hole. 3. The method of claim 2,
Wherein the ionic liquid is composed of a cation portion and an anion portion,
The cation moiety may be selected from the group consisting of tetraalkylammonium, dialkylimidazolium, trialkylimidazolium, tetraalkylimidazolium, alkylpyridinium, dialkylpyridinium, At least one member selected from the group consisting of Dialkylpyrrolidinium, Dialkylpiperidinium, Tetraalkylphosphonium and Trialkylsulfonium,
The anionic portion is _{^{Cl -, Br -, NO 3}} -, BF 4 -, PF 6 -, AlCl 4 -, Al 2 Cl 7 -, AcO -, CH 3 COO -, CF 3 COO -, CH 3 SO 3 - ^{_{, CF 3 SO 3 -, (}} CF 3 SO 2) 2 N -, (CF 3 SO 2) 3 C -, (CF 3 CF 2 SO 2) 2 N -, C 4 F 9 SO 3 -, C 3 F ^{_{7 COO -, (CF 3 SO}} 2) (CF 3 CO) N -, C 4 F 10 N -, C 2 F 6 NO 4 S 2 -, C 2 F 6 NO 6 S 2 -, C 4 F 10 NO ₄ S ₂ ^- , CF ₃ SO ₂ ^- , C ₄ F ₉ SO ₂ ^- , C ₄ F ₉ SO ₃ ^- , C ₂ H ₆ NO ₄ S ₂ ^- , C ₃ F ₆ NO ₃ S ^- and CH ₃ CH OH) < / RTI > CO < _{RTI ID = 0.0} > ^- . ≪ / _RTI > The method according to claim 1,
Wherein the case further comprises an organic material recovery member detachably coupled to an inner peripheral surface of the body. The method according to claim 1,
And the second cap is detachably coupled to the inner circumferential surface of the cap. The method according to claim 1,
Further comprising an organic material recovery piston for removing a solid formed on an inner peripheral surface of the body. The method according to claim 1,
And the second cap has a stepped portion. The method according to claim 1,
The second cap further comprises an organic material supply part for supplying an organic material to the case and an ionic liquid supply part for supplying an ionic liquid to the case,
Wherein the first cap further comprises a fluid discharge portion for discharging the ionic liquid and gas in the case to the outside. Supplying and mixing the pre-purification organic material and the ionic liquid;
Changing the temperature of the ionic liquid to crystallize the mixed organic material;
Separating the crystallized organic material from the ionic liquid and
Recovering the separated organic material,
Wherein the mixing step, the crystallizing step, the separating step and the recovering step are carried out in the same purification vessel. 11. The method of claim 10,
Wherein the recovering comprises recovering the organic material formed in the filter of the tablet vessel and recovering the organic material formed on the inner circumferential surface of the body of the tablet vessel,
Wherein the organic material formed on the inner peripheral surface is formed by the step of crystallizing. 11. The method of claim 10,
Wherein the crystallization step is performed once to produce an organic material purified (crystallized) at a purity of 99% or more. 11. The method of claim 10,
Exposing the filter of the tablet vessel to the outside; And
And pressurizing the ionic liquid.

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