WO2012169330A1 - フッ素ガス生成装置 - Google Patents
フッ素ガス生成装置 Download PDFInfo
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- WO2012169330A1 WO2012169330A1 PCT/JP2012/062592 JP2012062592W WO2012169330A1 WO 2012169330 A1 WO2012169330 A1 WO 2012169330A1 JP 2012062592 W JP2012062592 W JP 2012062592W WO 2012169330 A1 WO2012169330 A1 WO 2012169330A1
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
- B01D53/0407—Constructional details of adsorbing systems
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/68—Halogens or halogen compounds
- B01D53/685—Halogens or halogen compounds by treating the gases with solids
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B7/00—Halogens; Halogen acids
- C01B7/19—Fluorine; Hydrogen fluoride
- C01B7/20—Fluorine
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/24—Halogens or compounds thereof
- C25B1/245—Fluorine; Compounds thereof
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B15/00—Operating or servicing cells
- C25B15/08—Supplying or removing reactants or electrolytes; Regeneration of electrolytes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/112—Metals or metal compounds not provided for in B01D2253/104 or B01D2253/106
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2256/00—Main component in the product gas stream after treatment
- B01D2256/26—Halogens or halogen compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/20—Halogens or halogen compounds
- B01D2257/204—Inorganic halogen compounds
- B01D2257/2047—Hydrofluoric acid
Definitions
- the present invention relates to a fluorine gas generator that can efficiently use an adsorbent without waste.
- an electrolytic bath for electrolyzing hydrogen fluoride in an electrolytic bath made of a molten salt containing hydrogen fluoride is provided, and a main gas mainly composed of fluorine gas is generated on the anode side, and hydrogen gas is supplied on the cathode side.
- a fluorine gas generator that generates a by-product gas as a main component is known.
- the fluorine gas generated from the anode of the electrolytic cell is mixed with hydrogen fluoride gas (HF) vaporized from the molten salt. Therefore, in order to separate the hydrogen fluoride from the gas generated from the anode and purify the fluorine gas, there is a purification apparatus equipped with a detoxification tower filled with an adsorbent (detoxifying agent) such as sodium fluoride (NaF). Provided.
- adsorbent detoxifying agent
- NaF sodium fluoride
- the fluorine and hydrogen gas generated from the electrolytic cell contains hydrogen fluoride vaporized from the molten salt contained in the electrolytic cell and the mist component of the molten salt itself, and these components cause the deterioration of the adsorbent. It has become.
- the adsorbent near the entrance of the detoxification tower may be solidified by fusion or pulverized by volume expansion due to contact with a high concentration of hydrogen fluoride. There was a case. When such clogging occurs, the flow of gas is suppressed, causing a problem of blocking the detoxification tower.
- Patent Document 1 discloses that a space is formed between a gas inlet and an adsorbent in a fluorine gas generator in which an adsorbent such as sodium fluoride (NaF) is packed in a detoxification tower. In this space, the mist component droplets are diffused and settled, making it difficult for the adsorbent and molten salt mist component droplets to come into contact with each other.
- a technique for reducing the frequency of maintenance of a detoxification tower is disclosed.
- all adsorbents used once include adsorbents that do not sufficiently adsorb HF. It is common to dispose of and replace.
- Patent Document 1 in the replacement of the adsorbent, there is a loss of the adsorbent that has not adsorbed HF due to disposal, and all the adsorbent packed in the detoxification tower can be used efficiently without waste. There was a problem that it was difficult.
- the present invention has been made in view of the above problems, and an object of the present invention is to provide a fluorine gas generation apparatus that can efficiently use an adsorbent that adsorbs and removes hydrogen fluoride without waste.
- the present invention is a fluorine gas generation device that generates fluorine gas by electrolyzing hydrogen fluoride in a molten salt containing hydrogen fluoride
- the fluorine gas generation device includes hydrogen fluoride.
- Electrolysis of hydrogen fluoride in an electrolytic bath made of molten salt generates a main product gas mainly composed of fluorine gas on the anode side and a by-product gas mainly composed of hydrogen gas on the cathode side.
- the purification device includes a cylindrical member that circulates the main raw gas; and A gas inlet for introducing main raw gas, a gas outlet for extracting main raw gas from the cylindrical member, and a space for securing a flow path for the main raw gas flowing through the cylindrical member are formed.
- Adsorption arranged in A holder, a stirring means for stirring the main raw gas flowing in from the gas inlet, and a gas flow guide tube for circulating or diffusing the main raw gas in the space in the cylindrical member; It is a fluorine gas generation device characterized by having.
- the gas flow guide cylinder has a cylindrical shape with both end faces open, and is provided along the inner peripheral surface of the cylindrical member.
- the stirring means is located between the gas inlet and the adsorbent holder in the inflow direction of the main raw gas flowing from the gas inlet.
- the present invention may be configured to provide a circulation path for circulating a part of the main raw gas discharged from the cylindrical member and introducing it again into the cylindrical member.
- the internal space of the cylindrical member through which the main gas flows is stirred, and the gas flow guide tube for efficiently circulating or diffusing the main gas is provided. It is possible to prevent hydrogen fluoride from directly contacting the adsorbent and deteriorating the adsorbent. Therefore, it is possible to provide a fluorine gas generator that efficiently uses the adsorbent without waste.
- the fluorine gas generation device 100 generates fluorine gas by electrolysis of molten salt containing hydrogen fluoride, and supplies the generated fluorine gas to the external device 4.
- the external device 4 is, for example, a semiconductor manufacturing device.
- fluorine gas is used as a cleaning gas, for example, in a semiconductor manufacturing process.
- the fluorine gas generation device 100 includes an electrolytic cell 1 that generates fluorine gas by electrolysis, a fluorine gas supply system 2 that supplies the fluorine gas generated from the electrolytic cell 1 to the external device 4, and the generation of fluorine gas. And a by-product gas processing system 3 for processing the generated by-product gas.
- the electrolytic bath 1 stores a molten salt containing hydrogen fluoride (HF).
- HF hydrogen fluoride
- the composition of the fluorine compound gas generated from the electrolytic cell 1 can be appropriately changed.
- NF 3 nitrogen trifluoride
- a mixture of F 2 and NF 3 is obtained.
- the embodiment of the present invention will be described using a mixed molten salt (KF ⁇ 2HF) of hydrogen fluoride and potassium fluoride as the molten salt.
- the inside of the electrolytic cell 1 is partitioned into an anode chamber 11 and a cathode chamber 12 by a partition wall 6 immersed in the molten salt.
- the anode 7 and the cathode 8 are immersed, respectively.
- a main raw gas mainly containing fluorine gas (F2) is generated at the anode 7
- a hydrogen gas (H2) is mainly contained at the cathode 8.
- a by-product gas is generated.
- a carbon electrode is used for the anode 7, and soft iron, monel, or nickel is used for the cathode 8.
- a first gas chamber 11a into which fluorine gas generated at the anode 7 is guided, and a second gas chamber 12a into which hydrogen gas generated at the cathode 8 is guided. are partitioned by the partition wall 6 so that the mutual gas cannot pass.
- the first air chamber 11a and the second air chamber 12a are completely separated by the partition wall 6 in order to prevent a reaction due to the contact of fluorine gas and hydrogen gas.
- the molten salt in the anode chamber 11 and the cathode chamber 12 is not separated by the partition wall 6 but communicates through the lower portion of the partition wall 6.
- the temperature of the molten salt is preferably adjusted to 91 to 93 ° C.
- hydrogen fluoride is vaporized from the molten salt by the vapor pressure and mixed.
- each of the fluorine gas generated at the anode 7 and guided to the first air chamber 11a and the hydrogen gas generated at the cathode 8 and guided to the second air chamber 12a includes hydrogen fluoride gas. Yes.
- a first main passage 15 for supplying fluorine gas to the external device 4 is connected to the first air chamber 11a.
- the first main passage 15 is provided with a first pump 17 for deriving and transporting fluorine gas from the first air chamber 11a.
- a positive displacement pump such as a bellows pump or a diaphragm pump is used.
- a purification device 20 is provided upstream of the first pump 17 in the first main passage 15 to collect hydrogen fluoride mixed in the fluorine gas and purify the fluorine gas. The purification device 20 will be described in detail later.
- a second main passage 30 for discharging hydrogen gas to the outside is connected to the second air chamber 12a.
- the second main passage 30 is provided with a second pump 31 for deriving and transporting hydrogen gas from the second air chamber 12a.
- a detoxifying section 34 is provided downstream of the second pump 31 in the second main passage 30, and the hydrogen gas transported by the second pump 31 is adsorbed and removed by hydrogen fluoride in the detoxifying section 34 and is harmless. Is released.
- the fluorine gas generation device 100 also includes a raw material supply system 5 for supplying hydrogen fluoride, which is a raw material of fluorine gas, to the molten salt in the electrolytic cell 1 for replenishment. Below, the raw material supply system 5 is demonstrated.
- the electrolytic cell 1 is connected through a raw material supply passage 41 and a hydrogen fluoride supply source 40 in which hydrogen fluoride for replenishing the electrolytic cell 1 is stored. Hydrogen fluoride stored in the hydrogen fluoride supply source 40 is supplied into the molten salt of the electrolytic cell 1 through the raw material supply passage 41.
- a carrier gas supply passage 46 that guides the carrier gas supplied from the carrier gas supply source 45 into the raw material supply passage 41 is connected to the raw material supply passage 41.
- the carrier gas is a gas for introducing hydrogen fluoride from the hydrogen fluoride supply source 40 into the molten salt, and nitrogen gas which is an inert gas is used. Nitrogen gas is supplied together with hydrogen fluoride into the molten salt in the cathode chamber 12, hardly dissolves in the molten salt, and is discharged from the second air chamber 12 a through the second main passage 30.
- the purification apparatus 20 is an apparatus that removes hydrogen fluoride mixed in fluorine gas by adsorbing hydrogen fluoride mixed in fluorine gas on an adsorbent such as sodium fluoride (NaF).
- an adsorbent such as sodium fluoride (NaF).
- the purification apparatus 20 includes a cylindrical member 31a through which a gas can be circulated, and main gas introduction for guiding the fluorine gas generated at the anode 7 is introduced into the cylindrical member 31a.
- the mouth 51a is connected to a main raw gas outlet 52a for leading out fluorine gas.
- an adsorbent holder 201 for accommodating and holding the adsorbent 205 that adsorbs hydrogen fluoride, and an agitating blade 202 (stirring means) for agitating and mixing the flowing fluorine gas.
- a gas flow guide tube 203 for efficiently circulating or diffusing the fluorine gas in the space in the tubular member 31a.
- the adsorbent holder 201 accommodates and holds a predetermined amount of the adsorbent 205, and is arranged inside the cylindrical member 31a so as to form a gap for securing a gas flow path. Thereby, even when a part of the adsorbent 205 is clogged, the gas can be circulated without being blocked.
- a plurality of adsorbent holders 201 may be provided with a certain interval.
- the adsorbent holder 201 may be provided with a through hole (not shown).
- the through-hole here is not particularly limited as long as it is a size of a hole capable of holding the adsorbent 205 and allowing gas to pass therethrough, and is appropriately designed.
- the adsorbent holder 201 is preferably porous or mesh.
- the specific shape of the adsorbent holder 201 is not particularly limited as long as the gas flow path inside the cylindrical member 31a can be secured and the adsorbent 205 can be accommodated and held.
- the method of providing the adsorbent material holder 201 inside the cylindrical member 31a is not particularly limited as long as it is arranged so as to form a gap for securing the gas flow path.
- the adsorbent holder 201 is cylindrical. Examples thereof include a method of suspending in the internal space of the member 31a and a method of fixing the member 31a to the inner wall of the cylindrical member 31a.
- the adsorbent holder 201 is made of a tray-shaped member. Particularly preferred.
- the term “bowl-shaped member” refers to a flat container that can accommodate an object, and is not particularly limited in shape, such as a substantially circular shape or a substantially square shape, as long as it can accommodate an adsorbent. It is designed appropriately depending on the shape.
- the gas flow guide tube 203 is for efficiently circulating or diffusing the flowing fluorine gas into the internal space of the tubular member 31a by stirring with the stirring blade 202.
- the gas flow guide cylinder 203 has a cylindrical shape with both end faces opened, and is appropriately designed without any particular shape limitation as long as the gas can be circulated or diffused.
- the gas flow guide cylinder 203 is arranged such that the outer peripheral surface of the gas flow guide cylinder 203 is along the inner peripheral surface without the cylindrical member 31a in the longitudinal direction of the cylindrical member 31a. It is good to arrange in.
- fluorine gas can form a gas flow along the inner peripheral surface and the outer peripheral surface of the gas flow guide tube 203, so that the gas can be more efficiently used. Can be circulated or diffused.
- the fluorine gas stirred by the stirring blade 202 is more efficiently diffused or circulated through the gas flow guide tube 203.
- the hydrogen fluoride can be sufficiently adsorbed and removed by sufficiently contacting the adsorbent 205.
- the position where the stirring blade 202 is provided is preferably positioned between the main raw gas introduction port 51a and the adsorbent holder 201 in the inflow direction of the fluorine gas flowing from the main product gas introduction port 51a. According to this configuration, it is possible to prevent fluorine gas containing high-concentration hydrogen fluoride from coming into direct contact with the adsorbent 205 accommodated in the adsorbent holder 201. As a result, deterioration due to solidification of the adsorbent 205 and clogging due to pulverization can be more effectively prevented.
- the rotation speed of the stirring blade 202 is preferably 300 to 2000 rpm, and more preferably 600 to 1500 rpm.
- the rotation speed of the stirring blade 202 is smaller than 300 rpm, the fluorine gas in the cylindrical member 31a cannot be uniformly mixed to sufficiently adsorb hydrogen fluoride, and the concentration of hydrogen fluoride at the gas outlet 51a Is unfavorable because of the high.
- the rotation speed of the stirring blade 202 is larger than 2000 rpm, the stirring blade 202 causes shaft shake and cannot be stirred, which is not preferable.
- the average linear velocity of the gas flowing through the cylindrical member 31a can be 0.03 m / second to 5.0 m / second. More preferably, it is 0.05 to 2.0 m / sec.
- the average linear velocity of the gas flowing through the cylindrical member 31a may be measured using a general commercially available anemometer.
- the stirring blade 202 is not particularly limited as long as it can stir and mix the fluorine gas flowing inside the cylindrical member 31a.
- specific shapes include a paddle (flat) type, a turbine type, a screw type, Common examples such as a ribbon type can be mentioned.
- a stirring means in addition to stirring and mixing by the stirring blade 202, a configuration for stirring and mixing using a stirring rod, a configuration in which a separate pump is provided to circulate gas inside and mixing, or the inside of the cylindrical member 31a Alternatively, a temperature gradient may be generated, and a gas flow may be generated in the interior by this temperature gradient to stir and mix. Among them, it is preferable to use a stirring blade in order to stir the gas more simply and efficiently.
- the positional relationship between the main raw gas inlet 51a and the main raw gas outlet 52a is provided on the same surface side of the cylindrical member 31a, but this positional relationship is not particularly limited.
- the main raw gas inlet 51a and the main raw gas outlet 52a may be provided on the opposite surface side of the cylindrical member 31a or on the adjacent side surfaces of the cylindrical member 31a, respectively.
- the residence time of the fluorine gas in the cylindrical member 31a should be set according to the conditions of the apparatus to be operated as appropriate, but as a general condition, it is preferably 10 to 100 minutes, and more preferably 20 to 75. More preferably, minutes. If the staying time is shorter than 10 minutes, a sufficient contact time with the adsorbent 205 cannot be secured, and the HF concentration at the outlet becomes high, so that a sufficient function as a purification apparatus cannot be obtained. If the staying time is longer than 100 minutes, the purification apparatus becomes too large for the gas throughput, which is not suitable. Further, the volume of the cylindrical member 31a should be appropriately designed according to the flow rate of the main raw gas and the residence time in the cylindrical member 31a.
- the cylindrical member referred to here contains an adsorbent that adsorbs hydrogen fluoride inside, allows the fluorine gas generated from the electrolytic cell 1 to pass therethrough, and adsorbs and removes hydrogen fluoride in the fluorine gas. It represents a container, and its shape is not particularly limited.
- the material of the cylindrical member is preferably one having resistance to fluorine gas and hydrogen fluoride gas, and examples thereof include metals or alloys such as stainless steel, monel, and nickel.
- a pellet (NaF pellet) made of sodium fluoride (NaF) can be used as the adsorbent 205. Since the adsorption capability of sodium fluoride varies depending on the temperature, a heater 41a is provided around the cylindrical member 31a as a temperature controller for adjusting the internal temperature of the cylindrical member 31a.
- the temperature controller is not particularly limited as long as the temperature inside the cylindrical member 31a can be adjusted. For example, a heating / cooling device using a heater, steam heating, a heating medium, or a refrigerant may be used.
- alkali metal fluorides such as NaF, KF, RbF, and CsF can be used, among which NaF (sodium fluoride) is particularly preferable.
- NaF sodium fluoride
- the adsorption capacity of hydrogen fluoride varies depending on the temperature of sodium fluoride. The lower the temperature, the higher the adsorption capacity. For example, the general preset temperature is set to 20 ° C. to 100 ° C. If the preset temperature exceeds 100 ° C., the adsorbent cannot sufficiently adsorb HF.
- the purification apparatus 20 of the present invention since the gas flowing through the cylindrical member 31a is sufficiently circulated or diffused, fluorine gas containing a high concentration of HF does not come into contact with the adsorbent. Even if HF is adsorbed at a room temperature of about 30 ° C., deterioration and pulverization due to solidification of NaF pellets can be suppressed. Therefore, the purification apparatus 20 of the present invention can efficiently perform HF adsorption in a state where the inside of the cylindrical member 31a is set to a low temperature of about room temperature and the adsorption capability of NaF pellets is increased.
- a circulation path 53a that circulates part of the main raw gas discharged from the cylindrical member 31a and introduces it again into the cylindrical member 31a is provided. You may do it.
- a method for circulating a part of the main raw gas discharged from the cylindrical member 31a is not particularly limited, but a method using a compression pump 206 or a blower (not shown) as shown in FIG. General and preferred. Moreover, you may make it provide a valve
- the main gas flowing through the cylindrical member 31a can be mixed more uniformly, and the adsorbent can be used more efficiently and efficiently.
- the respective purification apparatuses may be used alternately while being switched.
- the purification apparatus may be provided on the anode side where the fluorine gas is generated and the cathode side where the hydrogen gas is generated, or may be provided only on the cathode side where the hydrogen gas is generated.
- the present invention can be applied to an apparatus that generates fluorine gas.
- a purification ability test of a purification apparatus applicable to the embodiment of the present invention as shown in FIG. 2 was conducted.
- As a purification capacity test the concentration of hydrogen fluoride contained in the gas at the gas inlet and the gas outlet of the refiner in repeated use was measured.
- Example 1 A tray type container (adsorbent holder) made of mesh (mesh spacing 1 mm) inside a cylindrical member (reaction volume 15 L) having a diameter of 200 mm ⁇ ⁇ length of 1500 mm equipped with a gas flow guide cylinder for circulating or diffusing gas. 201) was installed in five stages so as to form a space for securing a gas flow path inside the cylindrical member.
- the tray-type container used was a rectangular tray-shaped container, and was filled so that the bulk of pellet-shaped sodium fluoride (NaF pellets) was 50% with respect to the height of the container of 20 mm.
- the gas flow guide tube and the tray type container were made of stainless steel.
- the gas flow guide cylinder has a cylindrical shape with both end faces in the longitudinal direction opened, one end side has a substantially conical tapered portion, and the opening on one end side has a substantially circular shape. It was used.
- the gas flow guide cylinder has the tapered portion positioned on the gas inlet side provided in the cylindrical member so that the axial direction of the cylindrical member and the gas flow guide cylinder is the same, and the outer peripheral surface of the gas flow guide cylinder Is arranged along the inner peripheral surface of the cylindrical member.
- the stirring blade is disposed between the gas introduction port and the adsorbent holder in the gas inflow direction from the gas introduction port. It was arrange
- the diameter of the stirring blade is substantially the same as the size of the opening at one end of the gas flow guide tube (one end is tapered to narrow the gas flow path to the diameter of the stirring blade.
- a screw type having a diameter of 100 mm was used.
- the rotation speed of the stirring blade was set to 600 rotations per minute, and the gas stirring was performed with the gas linear velocity inside the cylindrical member set to 0.05 m / s. In addition, the gas linear velocity was measured using the anemometer installed in the position between the 3rd stage and the 4th stage of the tray.
- the gas flow guide cylinder is installed inside the cylindrical member, and the gas flowing into the cylindrical member is sufficiently circulated or diffused by the stirring blade, so that the high concentration hydrogen fluoride does not contact the adsorbent.
- the purification ability test was conducted in such a configuration.
- 9% hydrogen fluoride gas diluted with nitrogen gas was circulated so as to have a residence time of 30 minutes inside the cylindrical member. At this time, the cylindrical member was not heated.
- the hydrogen fluoride concentration at the gas outlet was analyzed by Fourier transform infrared spectroscopy (FT-IR).
- the temperature of the cylindrical member is adjusted to 250 ° C. by a heater provided on the outer periphery of the cylindrical member, and nitrogen gas is circulated so that the residence time inside the cylindrical member is 3 minutes.
- the desorption operation of hydrogen fluoride adsorbed on sodium hydride) was performed.
- the adsorption process for adsorbing the same hydrogen fluoride to the adsorbent and the desorption process of hydrogen fluoride were performed five times, and the measurement of the hydrogen fluoride concentration was measured at each time. After completion of the desorption process, the inside NaF pellets were observed. In the repetition test, a total of 3000 L of 9% hydrogen fluoride gas diluted with nitrogen gas was circulated at 0.55 L / min. Even in five repeated purification tests, it was not possible to confirm the pulverization and adhesion of the internally filled NaF pellets. Further, the hydrogen fluoride concentration at the gas outlet at all five times was 5000 ppm or less.
- the purification apparatus of the present invention since the increase in the weight of each tray container after completion of the repetitive purification test is almost the same, the purification apparatus of the present invention does not adsorb HF at a local portion, but almost all tray containers. It was found that HF can be evenly adsorbed, the load on the adsorbent is reduced, and the adsorbent can be used efficiently to the end.
- the hydrogen fluoride concentration at the gas outlet was about 9000 ppm immediately after the start of gas inflow, and hydrogen fluoride could not be sufficiently adsorbed, so that sufficient purification ability could not be obtained.
- Example 2 In the same manner as in Example 1, after 9% hydrogen fluoride gas was circulated at a total of 3000 L at 0.55 L / min, the cylindrical member was disassembled, and the NaF pellets stored and held therein were observed. Some of the NaF pellets housed near the gas inlet were solidified due to adhesion, confirming the deterioration of the adsorbent.
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Abstract
Description
上記の本発明の実施の形態以外に、他の変形例として、筒状部材31a内から排出される主生ガスの一部を循環させ、再び筒状部材31a内に導入させる循環経路53aを設けるようにしてもよい。
ガスを循環又は拡散させるガス流案内筒を装着した直径200mmφ×長さ1500mmの筒状部材(反応容積量15L)の内部に、メッシュ(網目間隔1mm)で作製したトレイ型容器(吸着剤保持具201)を、筒状部材の内部にガスの流路を確保する空間を形成するようにして5段設置した。なお、トレイ型容器には、角型盆状の形状のものを使用し、容器の高さ20mmに対して、ペレット状のフッ化ナトリウム(NaFペレット)の嵩が50%となるように充填した。なお、ガス流案内筒およびトレイ型容器はステンレス製のものを使用した。
筒状部材内に、攪拌羽根及びガス流案内筒を設置しない以外は実施例1と同様な実験条件で精製能力試験を行った。
1 電解槽
2 フッ素ガス供給系
3 副生ガス供給系
4 外部装置
5 原料供給系
7 陽極
8 陰極
11a 第1気室
12a 第2気室
15 第1メイン通路
17 第1ポンプ
20 精製装置
30 第2メイン通路
31 第2ポンプ
51a 主生ガス導入口
52a 主生ガス導出口
201 吸着剤保持具
202 攪拌羽根
203 ガス流案内筒
205 吸着剤
Claims (4)
- フッ化水素を含む溶融塩中のフッ化水素を電気分解することによって、フッ素ガスを生成するフッ素ガス生成装置であって、
前記フッ素ガス生成装置は、
フッ化水素を含む溶融塩からなる電解浴中でフッ化水素を電解することによって陽極側にフッ素ガスを主成分とする主生ガスを発生させると共に、陰極側に水素ガスを主成分とする副生ガスを発生させる電解槽と、前記主生ガスに混入したフッ化水素を吸着剤によって除去する精製装置と、を備え、
前記精製装置は、
前記主生ガスを流通させる筒状部材と、
前記筒状部材に前記主生ガスを導入するガス導入口と、
前記筒状部材から前記主生ガスを導出するガス導出口と、
前記筒状部材を流通する前記主生ガスの流路を確保する空間を形成するように配置された吸着剤保持具と、
前記ガス導入口から流入した前記主生ガスを攪拌するための攪拌手段と、
前記主生ガスを前記筒状部材内の空間に循環又は拡散させるためのガス流案内筒と、を有することを特徴とするフッ素ガス生成装置。 - 前記ガス流案内筒が、両端面が開口した筒形状であり、前記筒状部材の内周面に沿うように設けられたことを特徴とする請求項1に記載のフッ素ガス生成装置。
- 前記攪拌手段が、前記ガス導入口から流入する前記主生ガスの流入方向において、前記ガス導入口と前記吸着剤保持具の間に位置していることを特徴とする請求項1又は請求項2に記載のフッ素ガス生成装置。
- 前記筒状部材内から排出される前記主生ガスの一部を循環させ、再び前記筒状部材内に導入させる循環経路を設けたことを特徴とする請求項1乃至請求項3の何れかに記載のフッ素ガス生成装置。
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US14/112,850 US9194050B2 (en) | 2011-06-10 | 2012-05-17 | Fluorine gas generator |
CN201280028631.3A CN103597122A (zh) | 2011-06-10 | 2012-05-17 | 氟气生成装置 |
KR1020137033044A KR20140013074A (ko) | 2011-06-10 | 2012-05-17 | 불소 가스 생성 장치 |
EP12797054.9A EP2719798A4 (en) | 2011-06-10 | 2012-05-17 | FLUOR GAS GENERATOR |
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JP2011-129663 | 2011-06-10 | ||
JP2011129663A JP5757168B2 (ja) | 2011-06-10 | 2011-06-10 | フッ素ガス生成装置 |
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US (1) | US9194050B2 (ja) |
EP (1) | EP2719798A4 (ja) |
JP (1) | JP5757168B2 (ja) |
KR (1) | KR20140013074A (ja) |
CN (1) | CN103597122A (ja) |
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CN113880049A (zh) * | 2021-11-01 | 2022-01-04 | 衢州市鼎盛化工科技有限公司 | 一种回收氟化氢的方法及系统 |
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JPWO2021131816A1 (ja) * | 2019-12-27 | 2021-07-01 | ||
US20240157284A1 (en) | 2021-03-02 | 2024-05-16 | Resonac Corporation | Hydrogen fluoride gas removal device and method for removing hydrogen fluoride gas |
US20240139670A1 (en) | 2021-03-02 | 2024-05-02 | Resonac Corporation | Hydrogen fluoride gas removal device and method for removing hydrogen fluoride gas |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62171728A (ja) * | 1986-01-22 | 1987-07-28 | Babcock Hitachi Kk | ガス吸収分離装置 |
JPH09276649A (ja) * | 1996-04-12 | 1997-10-28 | Ishikawajima Harima Heavy Ind Co Ltd | 排ガス処理装置 |
JP2002102649A (ja) * | 2000-09-28 | 2002-04-09 | Kashiyama Kogyo Kk | ガス処理方法及びガス処理装置 |
JP2007190544A (ja) * | 2005-11-15 | 2007-08-02 | Chiba Univ | 硫酸ピッチの処理方法およびその装置ならびに中和処理装置 |
JP2009215588A (ja) | 2008-03-10 | 2009-09-24 | Toyo Tanso Kk | フッ素ガス発生装置 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8147590B2 (en) | 2000-08-17 | 2012-04-03 | Bayne Carew | Fluid filter separator and method |
US6468321B2 (en) * | 2001-01-10 | 2002-10-22 | John W. Kinsel | Blade and skirt assembly for directional gas cleaning and drying system |
JP3905433B2 (ja) * | 2002-07-11 | 2007-04-18 | レール・リキード−ソシエテ・アノニム・ア・ディレクトワール・エ・コンセイユ・ドゥ・スールベイランス・プール・レテュード・エ・レクスプロワタシオン・デ・プロセデ・ジョルジュ・クロード | フッ素ガス生成装置 |
JP5659491B2 (ja) * | 2009-01-30 | 2015-01-28 | セントラル硝子株式会社 | フッ素ガス発生装置を含む半導体製造設備 |
JP5572981B2 (ja) * | 2009-04-01 | 2014-08-20 | セントラル硝子株式会社 | フッ素ガス生成装置 |
JP2011017077A (ja) * | 2009-06-12 | 2011-01-27 | Central Glass Co Ltd | フッ素ガス生成装置 |
-
2011
- 2011-06-10 JP JP2011129663A patent/JP5757168B2/ja active Active
-
2012
- 2012-05-17 KR KR1020137033044A patent/KR20140013074A/ko not_active Application Discontinuation
- 2012-05-17 WO PCT/JP2012/062592 patent/WO2012169330A1/ja active Application Filing
- 2012-05-17 CN CN201280028631.3A patent/CN103597122A/zh active Pending
- 2012-05-17 US US14/112,850 patent/US9194050B2/en not_active Expired - Fee Related
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Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62171728A (ja) * | 1986-01-22 | 1987-07-28 | Babcock Hitachi Kk | ガス吸収分離装置 |
JPH09276649A (ja) * | 1996-04-12 | 1997-10-28 | Ishikawajima Harima Heavy Ind Co Ltd | 排ガス処理装置 |
JP2002102649A (ja) * | 2000-09-28 | 2002-04-09 | Kashiyama Kogyo Kk | ガス処理方法及びガス処理装置 |
JP2007190544A (ja) * | 2005-11-15 | 2007-08-02 | Chiba Univ | 硫酸ピッチの処理方法およびその装置ならびに中和処理装置 |
JP2009215588A (ja) | 2008-03-10 | 2009-09-24 | Toyo Tanso Kk | フッ素ガス発生装置 |
Non-Patent Citations (1)
Title |
---|
See also references of EP2719798A4 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113880049A (zh) * | 2021-11-01 | 2022-01-04 | 衢州市鼎盛化工科技有限公司 | 一种回收氟化氢的方法及系统 |
CN113880049B (zh) * | 2021-11-01 | 2023-05-26 | 衢州市鼎盛化工科技有限公司 | 一种回收氟化氢的方法及系统 |
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CN103597122A (zh) | 2014-02-19 |
EP2719798A1 (en) | 2014-04-16 |
JP5757168B2 (ja) | 2015-07-29 |
US20140083844A1 (en) | 2014-03-27 |
EP2719798A4 (en) | 2015-03-11 |
US9194050B2 (en) | 2015-11-24 |
JP2012255195A (ja) | 2012-12-27 |
KR20140013074A (ko) | 2014-02-04 |
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