WO2006064645A1 - ハロゲン系ガスの除去方法及びハロゲン系ガスの除去剤 - Google Patents
ハロゲン系ガスの除去方法及びハロゲン系ガスの除去剤 Download PDFInfo
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- WO2006064645A1 WO2006064645A1 PCT/JP2005/021611 JP2005021611W WO2006064645A1 WO 2006064645 A1 WO2006064645 A1 WO 2006064645A1 JP 2005021611 W JP2005021611 W JP 2005021611W WO 2006064645 A1 WO2006064645 A1 WO 2006064645A1
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- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/68—Halogens or halogen compounds
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- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
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- B01J20/04—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
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- B01J20/04—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
- B01J20/043—Carbonates or bicarbonates, e.g. limestone, dolomite, aragonite
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- B01J20/045—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium containing sulfur, e.g. sulfates, thiosulfates, gypsum
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- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
- B01J20/103—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate comprising silica
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- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
- B01J20/16—Alumino-silicates
- B01J20/18—Synthetic zeolitic molecular sieves
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- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28002—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their physical properties
- B01J20/28004—Sorbent size or size distribution, e.g. particle size
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- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
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- B01J20/28002—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their physical properties
- B01J20/28011—Other properties, e.g. density, crush strength
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- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
- B01J20/2803—Sorbents comprising a binder, e.g. for forming aggregated, agglomerated or granulated products
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- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/3007—Moulding, shaping or extruding
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- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/3028—Granulating, agglomerating or aggregating
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/3092—Packing of a container, e.g. packing a cartridge or column
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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
- B01D2257/202—Single element halogens
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01J2220/00—Aspects relating to sorbent materials
- B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
- B01J2220/42—Materials comprising a mixture of inorganic materials
Definitions
- the present invention relates to a method for removing a halogen-based gas contained in an exhaust gas generated in a semiconductor manufacturing process or the like, and a halogen-based gas remover.
- carrier gas such as N (nitrogen) gas, F, CI, Br, I, and Cal
- the present halogen-based gas selected from the group consisting of compounds capable of hydrolyzing to produce halogenated hydrogen or hypohalous acid.
- these halogen-based gas treatment methods include a dry treatment method using an activated carbon adsorbent as a packing material for the purpose of downsizing equipment and simplifying operation and equipment maintenance. Is often adopted.
- a dry treatment method using an activated carbon adsorbent as a packing material for the purpose of downsizing equipment and simplifying operation and equipment maintenance. Is often adopted.
- there is a risk of ignition due to the heat of adsorption of the gas to be treated generation of carbon monoxide due to the reaction between the activated carbon and the gas to be treated, and work when replacing the filler due to the odor of this halogen gas desorbed from the used adsorbent.
- Environmental problems and the disposal of solid waste are problems, and a solution has been sought.
- in order to reduce the frequency of replacing the packing further increase in the adsorption capacity of the packing has been demanded. These problems are particularly noticeable when removing frequently used C1 gas or mixed gas of C1 and BC1 (trisalt-boron).
- Patent Document 2 discloses a removal method using a remover consisting of a mixture of a solid base and activated carbon. This method is based on the above-mentioned ignition due to the heat of adsorption of the gas to be treated and the replacement of the filler due to the odor of the halogen-based gas that also desorbs the used adsorbent power. It was able to solve most of the requirements such as the deterioration of the working environment and solid waste disposal, and the increase in packing adsorption capacity to reduce the frequency of packing replacement work. However, since the chemical contains activated carbon, it has the disadvantage of producing carbon monoxide by the reaction between activated carbon and the halogen gas.
- Patent Document 3 discloses a remover containing slaked lime and thiosulfate.
- slaked lime is exothermic during the neutralization reaction.
- slaked lime remains a lot of unreacted slaked lime that has poor reaction efficiency with the halogen gas.
- slaked lime has a very low solubility in water, it is difficult to reduce the volume by dissolving in water during treatment after use.
- Patent Document 1 US Patent No. 6685901
- Patent Document 2 Pamphlet of International Publication No. 03Z033115
- Patent Document 3 Japanese Patent Laid-Open No. 2001-17831
- the present invention suppresses heat generation during adsorption of the present norogen-based gas, which has a high processing capacity of the present norogen-based gas, and reacts with the present halogen-based gas to produce a monoacid. It is an object of the present invention to provide a halogen-based gas removal method that can reduce generation of solid waste without generating carbon and a removal agent used therefor, and to improve semiconductor manufacturing processes and the like. Means for solving the problem
- the present invention relates to F, CI, Br, I, and hydrolyzed hydrogen halide or hypohalous halogen.
- a halogen-based gas removal method in which a halogenated gas is removed by contacting a granulated product containing 1 to 20% by mass of thiosulfate (hereinafter referred to as the present granulated product) in the presence of water.
- the present invention also relates to a halogen-based product comprising a granulated product containing 80 to 99.9% by mass of an alkali metal base and 0.1 to 20% by mass of thiosulfate with respect to the total mass of the granulated product.
- a gas scavenger Provides a gas scavenger.
- the granulated product contains an alkali metal base, so that the processing capacity of the main gas and the rogen-based gas can be improved as compared with the alkaline earth metal base. Rogen-based gas can be removed stably and effectively.
- the alkali metal base means an alkali metal salt that can react with halogen hydrogen, that is, a basic alkali metal salt.
- the granulated product contains thiosulfate, it undergoes an acid-reduction reaction with the halogen-based gas in the presence of water to generate an acid.
- the generated acid reacts with the hypohalite that also generates the halogen gas power, and it is considered that the removal reaction of the halogen gas is accelerated as a whole.
- the granulated product of the present invention suppresses heat generation during adsorption of the present norogen-based gas, which has a high processing capacity for the present norogen-based gas, and reacts with the present halogen-based gas to produce carbon monoxide.
- the generation of solid waste can be reduced without generating.
- the halogen-based gas removal method of the present invention can greatly contribute to the improvement of semiconductor production by improving the capacity of semiconductor manufacturing facilities that require the use of various gases while maintaining a high operating rate of the facilities.
- the gas to be processed targeted by the granulated product is F, CI, Br, I, and additive.
- the gas containing the halogen-based gas examples include dry etching exhaust gas, CVD chamber exhaust gas, ion implantation exhaust gas, doping exhaust gas and the like generated in the semiconductor manufacturing process.
- the compound that hydrolyzes to generate hydrogen halide, hypochlorous acid, or rogenic acid includes SiF
- COC1 phosgene
- a compound that hydrolyzes to produce hydrogen halide or hypohalous acid is obtained by hydrolysis.
- HF, HC1, HBr, or HI hydrogen halide or HFO, HC10, HBrO, HIO hypohalous acid include water contained in the gas to be treated, a small amount of water adhering to the granulated product, water generated by its elimination when the alkali metal base and Z or thiosulfate are hydrates.
- it can be hydrolyzed with water or the like which is a reaction product of the granulated product.
- the temperature of the halogen-based gas is 0 to 100 ° C. because it can be efficiently removed. If the temperature of the halogen-based gas is lower than 0 ° C, the reaction rate between the granulated product and the halogen-based gas may be reduced. In addition, if the temperature of the main gas and the rogen-based gas is 100 ° C. or lower, operations and equipment that do not require expensive heat-resistant materials or structures for equipment such as packed towers can be simplified.
- the alkali metal base in the present invention is preferably at least one selected from the group consisting of an alkali metal bicarbonate, carbonate, acid salt, and hydroxide strength.
- the bicarbonate include sodium bicarbonate and potassium bicarbonate.
- the carbonate include sodium carbonate, sodium sesquicarbonate (Na 2 CO 3 ⁇ NaHCO 2), carbonate power
- Examples of the oxide include sodium hydroxide and potassium oxide, and examples of the hydroxide include sodium hydroxide and potassium hydroxide.
- Other alkali metal bases include sodium silicate, soda lime, sodium tripolyphosphate or sodium citrate.
- sodium carbonate and sesquicarbonate can be used regardless of whether they are natural or synthetic, and sodium carbonate can be used regardless of whether it is light (light ash) or heavy (heavy ash).
- the alkali metal base is a carbonate or hydrogen carbonate
- carbon dioxide is generated in the reaction with the halogen-based gas to form pores on the surface of the removal agent. This is preferable because the processing capacity of the halogen-based gas can be increased.
- the alkali metal base is a hydrogen carbonate
- the hydrogen carbonate has a fire extinguishing property as sodium hydrogen carbonate is used as a fire extinguishing agent. Since it is an endothermic reaction, it has the great advantage that there is no risk of ignition compared to the adsorption operation with activated carbon that does not generate heat like slaked lime.
- sodium bicarbonate is easy to produce and store granules that are hygroscopic and large. It is particularly preferable because it is suitable as an industrial production raw material because it is available in a small amount and at a low price. on the other hand
- Examples of the thiosulfate in the present invention include sodium thiosulfate, potassium thiosulfate, and ammonium thiosulfate.
- sodium thiosulfate is preferred because it is inexpensive and easily available industrially. In addition, it is easy to supply the water necessary for the halogen gas removal reaction! /, So pentahydrate is preferred over anhydride.
- the alkali metal base and Z or thiosulfate in the present invention are preferably hydrates.
- acid gases such as these non-hydrogen gas powers HF, HC1, HBr and HI without the addition of new equipment or packing.
- acidic gases are used for the decomposition of hypohalite generated from the halogen gas.
- alkali metal base hydrates include sodium carbonate monohydrate, sodium carbonate heptahydrate, sodium carbonate decahydrate, etc.
- the content of the alkali metal base in the granulated product is 80 to 99.9% by mass, and the content of thiosulfate is 0.1 to 20% by mass. If the content of thiosulfate in the granulated product is less than 0.1% by mass, the effects described below containing thiosulfate cannot be obtained, and therefore, it is not preferable. Similarly, this is not preferable because the processing capacity of the halogen-based gas is reduced.
- the content of thiosulfate in the granulated product is particularly preferably 5 to: LO mass%.
- halogen-based gas is F, CI, Br or I
- a larger amount of the halogen-based gas can be removed in the presence of water than when the same amount of the alkali metal base is used.
- the thiosulfate in this granulated product undergoes an oxidation-reduction reaction with F, CI, Br or I in the presence of water to produce an acid.
- salty hydrogen (Equation [2]).
- the water required for the reaction of formula [2] is water mixed in the gas to be treated, a slight amount of water adhering to the granulated product, alkali metal base and Z or thiosulfate is a hydrate.
- pentahydrate as sodium thiosulfate because water can be easily supplied.
- Anhydrate and pentahydrate may be mixed at an arbitrary ratio and used.
- water is also supplied as the reaction product of this granulated product (Formula [1], Formula [3-1], Formula [3-2]). Acids such as salt hydrogen generated in Equation [2] are thought to promote the decomposition of sodium hypochlorite produced on the right side of Equation [1] (Equation [3-1], [3-2]).
- hypohalite is formed in the same way, and its decomposition is
- a porous body made of an inorganic oxide (hereinafter simply referred to as a porous body) is 1 to 20 It is preferable to contain by mass.
- the halogen-based gas and the halogen-hydrogen gas generated by the above reaction formula are guided to the interior of the granulated product to react with the entire granulated product. Can do. If the content of the porous material is less than 1% by mass, the effect of the addition may not be sufficiently manifested. If the content exceeds 20% by mass, the proportion of the active ingredient in the granulated product decreases. Since reaction efficiency falls, it is not preferable.
- the porous body preferably has an average pore radius of 0.1 to 50 nm and a pore volume of 0.005 to 0.5 cmVg.
- the porous material increases the specific surface area for the reaction of the granulated product by allowing the halogenated gas and the hydrogen halide gas generated by the above reaction formula to reach the deep part of the granulated product! ] This improves the reaction rate and reaction efficiency between the granulated product, the halogen-based gas and the hydrogen halide gas generated by the above reaction formula. If the average pore radius and pore volume of the porous material are smaller than the above values, gas diffusion becomes insufficient and the reaction rate and reaction efficiency are lowered, which is not preferable.
- the porous body particularly preferably has an average pore radius of 0.2 to 50 nm and a pore volume of 0.01 to 0.2 cm 3 Zg.
- the average pore radius was determined by measuring the pore volume by the nitrogen adsorption method using a pore distribution measuring device by the gas adsorption method, and calculating the cumulative curve with the total pore volume being 100%. The pore radius (nm) at the point where the cumulative pore volume is 50%.
- the addition of clay to the granulated product also has a gap in the granulated product because the clay has a layered structure, and gas is supplied to the interior of the granulated product in the same manner as the porous body. It is preferable because it is easy to guide to If the clay content is less than 1% by mass, the effect is not improved, and if the content exceeds 20% by mass, the hardness of the granulated product may decrease. When the porous body and clay are used in combination, the total amount is preferably 20% by mass or less.
- the ratio of the alkali metal base to the porous material or clay in the granulated product is optimized depending on the composition of the target main gas, the rogen-based gas, concentration, pressure, temperature, required processing time, etc. .
- concentration, pressure, and temperature of the main and gas-based gases are low, the contact time between the granulated product and the halogen-based gas is short. In this case, it is preferable to increase the content of the porous material.
- Examples of the porous body include natural or synthetic zeolite, silica gel, alumina, porous glass, diatomaceous earth, and porous ceramics.
- the clay includes activated clay, acid clay, pearlite, layered silicates such as chrysotile and bentonite, sepiolite, palygorskite, alofen, imogolite, acid treatment products of antigolite, synthetic layered mixture, etc. Is mentioned.
- silica gel, natural or synthetic zeolite is preferable, and as the clay, activated clay and bentonite are particularly preferable because they are easily available industrially at low cost.
- the alkali metal base preferably has an average primary particle diameter of 1 to 500 ⁇ m.
- Thiosulphate can be applied to readily available crystalline products with a diameter of about 1 to: LOmm, but using pulverized to 1 to 500 / ⁇ ⁇ before forming the granulated product This is preferable because it can be mixed more uniformly in the step of mixing the raw materials.
- the average particle diameter of these primary particles is 1 to 500 ⁇ m. When the average particle size of the primary particles is less than 1 ⁇ m, handling such as handling with poor fluidity tends to be difficult.
- the average particle diameter of the primary particles is more than 500 m, uniform mixing of the alkali metal base and the porous material or clay in the granulated material becomes difficult. This is not preferable because it is difficult to manufacture and is expensive.
- the primary particles are alkali metal base single crystals, thiosulfate crystals or powders, porous powders, and clay powders.
- the average particle size of those having an average particle size of 70 ⁇ m or more, such as powder and granulated product is the value of each sieve and the lowermost tray in the sieving method. Measure the mass remaining above, create a cumulative curve with the total mass as 100%, and the particle diameter at the point where the cumulative mass is 50%.
- the average particle size of particles with an average particle size of less than 70 m is the average particle size measured by a laser diffraction scattering type particle size distribution analyzer and the cumulative volume is 50% when the total volume is calculated as 100%. This is the particle diameter at the point where% is obtained.
- the average particle size of the granulated product is preferably 0.5 to 20 mm.
- the filling type equipment for activated carbon and zeolite that has been used conventionally without introducing new equipment.
- the average particle size of the granulated product is less than 0.5 mm, the pressure loss due to the halogen gas, which is the gas to be treated, passing through the packed bed of the granulated product increases. There is a tendency that the suction equipment needs to be strengthened and the required power increases. Further, if the average particle diameter is more than 20 mm, the area of the contact portion between the halogen-based gas and the outer surface of the granulated product decreases, and the removal performance of the halogen-based gas of the granulated product tends to decrease. .
- the average particle size of the granulated product is particularly preferably from 0.5 to LOmm.
- the granulated product having a particle size of not more than 90 mm is 90% or more on a mass basis, If the granulated product with a particle diameter of 1. Omm or less is 10% or less on the mass basis, the structure of the packed bed becomes uniform and higher removal performance is achieved. This is because the number of theoretical plates increases when the packed bed structure is uniform.
- the reaction rate of the granulated product may be reduced.
- a binder can be mixed in the granulated product.
- the binder can be appropriately selected depending on the composition of the halogen-based gas such as water glass (concentrated sodium silicate aqueous solution), sodium silicate, CMC (carboxymethylcellulose) or PVA (polybutyl alcohol).
- the mixing amount of the binder is preferably 0.01 to L0 mass% with respect to the total mass of the granulated product. If the mixing amount of the binder is less than 0.01% by mass, the effect of improving the hardness by the binder is not seen, so there is no point in using the binder, and if the mixing amount exceeds 10% by mass, the reaction There is a risk that the amount of the active ingredient in the product may decrease.
- the total amount of alkali metal base and thiosulfate is 80% by mass or more. Is more preferably 85% by mass or more. If the total amount of the alkali metal base and thiosulfate is less than 80% by mass, the gas treatment capacity as the removal agent of the present norogen-based gas may be reduced, and the replacement frequency of the removal agent packed bed may be increased.
- the granulated product can also be obtained by a dry method or a wet method! /.
- the granulation method include compression molding methods, rolling granulation methods, stirring granulation methods, extrusion molding methods, spray drying methods, and fluidized bed methods.
- a dry compression molding method such as a tableting method or a roll press method is advantageous for industrial production because the drying process is not required and is advantageous for industrial production. It is preferable because the total amount of the alkali metal base and thiosulfate can be increased and there is no concern about the strength reduction of the granulated particles due to the deterioration of the binder by the halogen-based gas.
- a step of crushing and sieving after molding with a dry compression molding machine can be employed as a method for adjusting the particle size distribution and the average particle size of the granulated product.
- an alkali metal base and thiosulfate, or if necessary, a porous material, a water-soluble binder such as CMC, and water are mixed, and then a pelletizer is used.
- a method of adjusting the particle size distribution and the average particle size by drying and sieving after molding with a wet extrusion molding machine such as the above.
- the melting point is 48 ° C. Therefore, when the raw material mixture is heated to 48 ° C or higher, sodium thiosulfate itself Can be used as a binder to granulate.
- Hardness is used as a strength evaluation method of the granulated product. Hardness is the force when compressing and destroying a particle by applying a force vertically from above. Since this hardness is affected by the particle diameter even if the material is the same, it is necessary to measure it after sorting the particles by sieving. There is.
- this granulated product has an average particle size of 0.5 to 20 mm, each particle is sieved by 0.5 mm in increments of 0.5 mm. For example, for particles with an average particle size of 1.5 mm or more and less than 2. Omm, sieve with 1.5 mm sieve and sieve 2. Omm sieve, 1.5 on sieve and 2. Omm Collect 20 particles under the sieve, measure the hardness of each particle, and adopt the average value as the evaluation standard of particle strength.
- the hardness of the granulated product is such that the average hardness of the granulated product having a particle size of 0.5 mm or more and less than 1 Omm is 5N or more, or the average hardness of the granulated product having a particle size of 1. Omm or more and less than 1.5 mm.
- the average hardness of the granulated product with a hardness of 15N or more, or a particle size of 1.5 mm or more and less than Omm is 25N or more, or the average hardness of a granulated product with a particle size of 2. Omm or more must be 5N or more. preferable.
- each of the above particle diameter ranges has a value equal to or higher than the average hardness listed above.
- This granulated product has an advantage that the processing capacity can be increased since the bulk density is high and the packing mass of the column of the abatement apparatus can be increased.
- the packing density of the activated carbon used conventionally 0. 4 ⁇ 0. 6 gZcm is 3 whereas the packing density of the granule is 0. 7GZcm 3 or more, preferably 0. 8 g ZCM 3 or more, further It is preferably 0.9 gZcm 3 or more, and the processing amount of the halogen-based gas having a high packing density per unit volume is large.
- the alkali metal base in the granulated product is sodium hydrogen carbonate or potassium hydrogen carbonate, they are water-soluble themselves, and many of the reaction products with the halogen-based gas become water-soluble salts. .
- water-soluble salts are produced, most of the materials other than the porous material are soluble in water after detoxifying the halogen-based gas, so that solid waste can be greatly reduced, which is preferable.
- the porous material can be recovered by filtering the granulated product when dissolved in water, which can be reused as needed, and can be used for resource recycling.
- the alkali metal base in the granulated product reacts with the halogen-based gas to produce a non-volatile salt in the environment of use. Therefore, when replacing the packing, only the activated carbon is used. Generation of gas due to desorption of this halogen-based gas as in the case of detoxification by adsorption, and Does not generate halogen odor. For this reason, the working environment during the replacement work of the packing material is greatly improved, so that the abatement equipment installed in the workplace where the worker can work with a force that is preferable in terms of labor safety can be reduced in size.
- the granulated product may be used in combination with other removal agents. For example, depending on the composition of the gas to be treated, it is mixed with a granulated product of activated carbon or a granulated product of sodium hydrogen carbonate, or used in combination with a layer of granulated product of activated carbon or a granulated product of sodium hydrogen carbonate. It can be used by packing in the column of the device. For example, when hydrogen chloride is the majority of the halogen-based gas, a packed bed of granulated sodium hydrogen carbonate is placed upstream of the halogen-based gas and the packed bed of the granulated material is downstream. I prefer to distribute it.
- Examples 1 and 4 The following description is based on examples (Examples 1 and 4) and comparative examples (Examples 2, 3 and 5).
- the hardness was measured using a Kiya type digital hardness tester KHT-20 type (manufactured by Fujiwara Seisakusho).
- KHT-20 type manufactured by Fujiwara Seisakusho.
- the hardness was measured for those with a uniform particle diameter by sieving.
- the average particle size those having an average particle size of less than 70 ⁇ m are measured using a micro track FRA9220 (manufactured by Nikkiso Co., Ltd.), and those having an average particle size of 70 m or more are sieved. It was measured.
- the average pore radius and pore volume were measured using an automatic surface area measuring device (manufactured by AMCONE, trade name: Soapmatic 1990).
- the obtained flaky shaped product was rolled into a roll-type crushing and granulating machine (Nihon Dara-Yureta Co., Ltd., The product was coarsely pulverized and sized by a product name: Crushing Roll Dara-Yureta GRN-2521).
- the crusher was installed in two stages, the pitch of the rotating teeth in the first stage was 14 mm, and the second stage was 4 mm.
- the sized particles are sieved with a standard mesh made of wire mesh stainless steel with an inner diameter of 200 mm, and 1.7 mm and 4. Omm are set in two stages and sieved by hand. Particles were collected to obtain the granulated product.
- the average particle size of the granulated product was 1.8 mm.
- the granulated product with a particle size of 4 mm or less was 100% by mass, and the granulated product with a particle size of 1.41 mm or less was 4.8% by mass.
- the hardness of the granulated product was measured by the hardness measurement method described above. That is, the obtained granulated product with an average particle size of 1.8 mm was sieved with sieves of 1.4 mm, 2.0 mm, and 2.8 mm, and the average value was obtained by measuring 20 hardnesses of each particle size. However, the average hardness of the particles between 1.4 and 2.0 mm was 14.9 N, 2.0 to 2.8 mm was 56.9 N, and 2.8 mm or more was 81.3 N.
- the granulated product was filled as a filling material into a glass reaction tube having a bottom surface of a breathable glass plate having an inner diameter of 30 mm and a length of 300 mm so that the packed bed height was 100 mm.
- the filling volume was 70.7 cm 3
- the filling mass was 83.5 g
- the packing density was 1.18 gZcm 3 .
- the standard condition (0.C, 0. lOMPa) at a flow rate per minute 424Cm 3
- the temperature was highest on the gas downstream side and lowest on the gas upstream side. In addition, the highest temperature and the lowest temperature moved to the gas downstream side as the reaction progressed. This tendency was common to the following examples. In addition, including Example 5 below, the outside temperature of the device was 23-26 ° C.
- Example 1 the test was conducted in the same manner as in Example 1 except that the granulated material was changed to only sodium bicarbonate.
- the average particle size of this granulated product was 2.1 mm. Particles with a particle size of 4 mm or less were 100% on a mass basis, and particles with a particle size of 1. Omm or less were 21.1% on a mass basis.
- the packing volume was 70.7 cm 3
- the packing mass was 67 g
- the packing density was 0.92 gZcm 3 .
- Example 1 As in Example 1, a glass container containing litmus test paper and iodine iodine-iodide starch paper was installed at the gas outlet of the packed glass reaction tube, but there was no change immediately after the start.
- Example 1 A test was conducted in the same manner as in Example 1 except that impregnated activated carbon (trade name: Granular White Birch XRC) manufactured by Takeda Pharmaceutical Company Limited was used instead of the granulated product of Example 1.
- the average particle size is 1.4mm Particles with a diameter of less than or equal to mm were 100% on a mass basis, and particles with a particle size of 1. Omm or less were 10.3% on a mass basis.
- the packing volume was 70.7 cm 3
- the packing mass was 43 g
- the packing density was 0.61 gZcm 3 .
- the chlorine gas detector did not work and the C1 concentration was 0.01 volume ppm or less.
- the vessel has been activated.
- the activated carbon powder and the activated carbon adhered to each other.
- water was added to the filling, it did not dissolve.
- a maximum temperature of 73 ° C was observed and heat generation was observed. The minimum temperature was 25 ° C.
- Example 2 The same granulated product as in Example 1 was filled in the same manner as in Examples 1 to 3 so that the packed bed height was 100 mm.
- the filling volume was 70.7 cm 3
- the packing mass was 82.0 g
- the packing density was 1.16 gZcm 3 .
- Standard condition (0 ° C, 0.1 lOMPa), flow rate 424cm 3 / min, composition BC1 0.6% by volume
- Example 1 As in Example 1, a glass container containing litmus paper and iodine iodine iodide paper was installed at the gas outlet of the packed glass reaction tube, but there was no change immediately after the start. Also, carbon monoxide was not detected.
- Example 5 (comparative example)] 8.8 kg of slaked lime, 0.2 kg of bentonite, and 0.5 kg of sodium thiosulfate pentahydrate were uniformly mixed, and molded, crushed and sieved in the same manner as in Example 1 to obtain a granulated product.
- the average particle size of the granulated product was 1.6 mm, particles having a particle size of less than or equal to mm were 100% on a mass basis, and particles having a particle size of 1.41 mm or less were 5.1% on a mass basis.
- Example 1 As in Example 1, when the granulated product was filled so that the packed bed height was 100 mm, the filling capacity was 70.7 cm 3 , the filling mass was 69.0 g, and the packing density was 0.98 gZcm 3. Met. As in Example 1, a mixed gas of chlorine and nitrogen was injected to treat the gas.
- exhaust gas such as dry etching and CVD, and the halogen-based gas in various processes can be removed.
- the halogen-based gas removing agent of the present invention can be suitably used for spraying agents for emergency detoxification, absorption tubes for gas masks, and the like.
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Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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EP05809764A EP1842579A4 (en) | 2004-12-13 | 2005-11-24 | METHOD FOR REMOVING GAS FROM HALOGEN BASIS AND MEANS FOR REMOVING GAS FROM HALOGEN BASIS |
JP2006548740A JP4952250B2 (ja) | 2004-12-13 | 2005-11-24 | ハロゲン系ガスの除去方法及びハロゲン系ガスの除去剤 |
US11/762,097 US20070253879A1 (en) | 2004-12-13 | 2007-06-13 | Method for removing halogen series gas and agent for removing halogen series gas |
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JP2004-360414 | 2004-12-13 | ||
JP2004360414 | 2004-12-13 |
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US11/762,097 Continuation US20070253879A1 (en) | 2004-12-13 | 2007-06-13 | Method for removing halogen series gas and agent for removing halogen series gas |
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US (1) | US20070253879A1 (ja) |
EP (1) | EP1842579A4 (ja) |
JP (1) | JP4952250B2 (ja) |
KR (1) | KR20070087600A (ja) |
TW (1) | TW200628216A (ja) |
WO (1) | WO2006064645A1 (ja) |
Cited By (8)
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JP2011121000A (ja) * | 2009-12-10 | 2011-06-23 | Chubu Electric Power Co Inc | ガス処理方法、ガス処理装置、およびガス処理剤 |
WO2013137416A1 (ja) * | 2012-03-16 | 2013-09-19 | 栗田工業株式会社 | 酸性ガス処理剤及びその製造方法並びに酸性ガス処理剤用添加剤 |
JP2013539717A (ja) * | 2010-09-15 | 2013-10-28 | ソルヴェイ(ソシエテ アノニム) | ガスからのf2および/またはof2の除去方法 |
JP2015112546A (ja) * | 2013-12-12 | 2015-06-22 | 宇部興産株式会社 | ガスの処理装置及びガスの処理カートリッジ |
JP2015112545A (ja) * | 2013-12-12 | 2015-06-22 | 宇部興産株式会社 | ガスの処理装置及びガスの処理カートリッジ |
JP2018126679A (ja) * | 2017-02-07 | 2018-08-16 | クラリアント触媒株式会社 | ハロゲンガスの除去剤、その製造方法、それを用いたハロゲンガス除去方法、及びハロゲンガスを除去するシステム |
JP2019122906A (ja) * | 2018-01-15 | 2019-07-25 | 宇部興産株式会社 | ガス処理装置 |
JP2020018953A (ja) * | 2018-07-30 | 2020-02-06 | クラリアント触媒株式会社 | ハロゲンガス除去剤とその製造方法、及び除去剤の消費状態をモニターする方法 |
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KR20090019791A (ko) * | 2006-05-19 | 2009-02-25 | 아사히 가라스 가부시키가이샤 | 할로겐계 가스의 제거 방법 및 할로겐계 가스의 제거제 |
FR3031915B1 (fr) * | 2015-01-28 | 2018-11-30 | Centre National De La Recherche Scientifique (C.N.R.S) | Nouveau materiau comme adsorbant pour la decontamination moleculaire |
GB201513836D0 (en) * | 2015-08-05 | 2015-09-16 | Johnson Matthey Plc | Chemical absorbent composition |
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- 2005-11-24 EP EP05809764A patent/EP1842579A4/en not_active Withdrawn
- 2005-11-24 JP JP2006548740A patent/JP4952250B2/ja not_active Expired - Fee Related
- 2005-11-29 TW TW094141916A patent/TW200628216A/zh unknown
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Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2011121000A (ja) * | 2009-12-10 | 2011-06-23 | Chubu Electric Power Co Inc | ガス処理方法、ガス処理装置、およびガス処理剤 |
JP2013539717A (ja) * | 2010-09-15 | 2013-10-28 | ソルヴェイ(ソシエテ アノニム) | ガスからのf2および/またはof2の除去方法 |
WO2013137416A1 (ja) * | 2012-03-16 | 2013-09-19 | 栗田工業株式会社 | 酸性ガス処理剤及びその製造方法並びに酸性ガス処理剤用添加剤 |
JP2013193005A (ja) * | 2012-03-16 | 2013-09-30 | Kurita Water Ind Ltd | 酸性ガス処理剤及びその製造方法並びに酸性ガス処理剤用添加剤 |
JP2015112546A (ja) * | 2013-12-12 | 2015-06-22 | 宇部興産株式会社 | ガスの処理装置及びガスの処理カートリッジ |
JP2015112545A (ja) * | 2013-12-12 | 2015-06-22 | 宇部興産株式会社 | ガスの処理装置及びガスの処理カートリッジ |
JP2018126679A (ja) * | 2017-02-07 | 2018-08-16 | クラリアント触媒株式会社 | ハロゲンガスの除去剤、その製造方法、それを用いたハロゲンガス除去方法、及びハロゲンガスを除去するシステム |
WO2018146888A1 (ja) * | 2017-02-07 | 2018-08-16 | クラリアント触媒株式会社 | ハロゲンガスの除去剤、その製造方法、それを用いたハロゲンガス除去方法、及びハロゲンガスを除去するシステム |
CN110267738A (zh) * | 2017-02-07 | 2019-09-20 | 日商科莱恩触媒股份有限公司 | 卤素气体的去除剂、其制造方法、使用其的卤素气体去除方法以及去除卤素气体的系统 |
CN110267738B (zh) * | 2017-02-07 | 2022-09-20 | 日商科莱恩触媒股份有限公司 | 卤素气体的去除剂、其制造方法以及去除卤素气体的系统 |
JP2019122906A (ja) * | 2018-01-15 | 2019-07-25 | 宇部興産株式会社 | ガス処理装置 |
JP6992527B2 (ja) | 2018-01-15 | 2022-01-13 | 宇部興産株式会社 | ガス処理装置 |
JP2020018953A (ja) * | 2018-07-30 | 2020-02-06 | クラリアント触媒株式会社 | ハロゲンガス除去剤とその製造方法、及び除去剤の消費状態をモニターする方法 |
JP7253132B2 (ja) | 2018-07-30 | 2023-04-06 | クラリアント触媒株式会社 | ハロゲンガス除去剤とその製造方法、及び除去剤の消費状態をモニターする方法 |
Also Published As
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TW200628216A (en) | 2006-08-16 |
JPWO2006064645A1 (ja) | 2008-06-12 |
US20070253879A1 (en) | 2007-11-01 |
EP1842579A4 (en) | 2009-08-05 |
KR20070087600A (ko) | 2007-08-28 |
JP4952250B2 (ja) | 2012-06-13 |
EP1842579A1 (en) | 2007-10-10 |
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