JP3051002B2 - HCFC-141b recovery method - Google Patents
HCFC-141b recovery methodInfo
- Publication number
- JP3051002B2 JP3051002B2 JP5014059A JP1405993A JP3051002B2 JP 3051002 B2 JP3051002 B2 JP 3051002B2 JP 5014059 A JP5014059 A JP 5014059A JP 1405993 A JP1405993 A JP 1405993A JP 3051002 B2 JP3051002 B2 JP 3051002B2
- Authority
- JP
- Japan
- Prior art keywords
- activated carbon
- hcfc
- present
- recovery
- gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/151—Reduction of greenhouse gas [GHG] emissions, e.g. CO2
- Y02P20/155—Perfluorocarbons [PFC]; Hydrofluorocarbons [HFC]; Hydrochlorofluorocarbons [HCFC]; Chlorofluorocarbons [CFC]
Landscapes
- Treating Waste Gases (AREA)
- Separation Of Gases By Adsorption (AREA)
- Carbon And Carbon Compounds (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、洗浄装置あるいは蒸留
再生装置等から蒸散したＨＣＦＣ−１４１ｂを活性炭に
より回収するＨＣＦＣ−１４１ｂ回収方法に関するもの
である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for recovering HCFC-141b, which has been evaporated from a washing device or a distillation regeneration device, using activated carbon.
【０００２】[0002]
【従来の技術とその解決しようとする課題】電子部品、
精密部品等の洗浄に使用されている１，１，２−トリク
ロロ−１，２，２−トリフルオロエタン（ＣＦＣ−１１
３）の代替フロンとして開発された１，１−ジクロロ−
１−フルオロエタン（以下、ＨＣＦＣ−１４１ｂ）は、
特定フロン（ＣＦＣ）と同様にオゾン層破壊や地球温暖
化に重大な影響を及ぼす事が判明している為、規制物質
として取り扱われ、終局的には全廃される事が決定して
いるので、１４１ｂの使用に際しては、環境保護の立場
から出来るだけ大気には排出せずに回収して再利用する
事が強く望まれている。2. Description of the Related Art Electronic components,
1,1,2-Trichloro-1,2,2-trifluoroethane (CFC-11) used for cleaning precision parts and the like
1,1-Dichloro- which was developed as an alternative fluorocarbon of 3)
1-fluoroethane (hereinafter, HCFC-141b) is
It has been found that it has a significant effect on ozone layer depletion and global warming as well as specified chlorofluorocarbons (CFCs), so it has been decided to be treated as a controlled substance and eventually abolished altogether. When using 141b, it is strongly desired to recover and reuse it as much as possible without discharging it to the atmosphere from the standpoint of environmental protection.
【０００３】フロン規制以降、フロンの消費量を削減す
る方法として、活性炭を用いたガス回収装置が使用され
ている。溶剤を回収する回収装置においては、回収装置
に使用する活性炭の種類や回収装置の脱着用水蒸気温
度、水蒸気量、脱着時間等の条件によっては、少なから
ず吸着成分は分解して微量の分解物質を生成するもので
ある。代替フロンであるＨＣＦＣ−１４１ｂは、ヤシ殻
を原料にして製造した粒状活性炭を使用した回収装置で
回収し、回収された溶剤をガスクロマトグラフにより分
析すると、新液には存在しなかったピークが検出され、
主成分の純分が低下している場合があり、再利用には適
さない事がある。分解により生成する物質は、１，１−
ジクロロエチレン（以下、ＨＣＣ−１１３０ａ）、１−
クロロ−１−フルオロエチレン（以下、ＨＣＦＣ−１１
３１ａ）及び、１−クロロ−１−フルオロエタン（以
下、ＨＣＦＣ−１５１ａ）であり、特に、ＨＣＣ−１１
３０ａの生成が多く、ＨＣＦＣ−１４１ｂの純分低下の
主原因になっている。又、ＨＣＣ−１１３０ａは沸点が
３２℃でＨＣＦＣ−１４１ｂの沸点とほゞ同沸点である
ため、分解生成すると分離が難しく、加えて、引火性
（引火点は−２２℃）を有するので、着火の危険性があ
り回収装置の安全性上、重大な問題となる。[0003] Since the regulation on CFCs, a gas recovery device using activated carbon has been used as a method for reducing the consumption of CFCs. Depending on the type of activated carbon used in the recovery device and the conditions of the desorption steam temperature, the amount of water vapor, the desorption time, etc. of the recovery device in the recovery device for recovering the solvent, the adsorbed components are decomposed to a considerable extent and trace amounts of decomposed substances are removed. To generate. HCFC-141b, an alternative chlorofluorocarbon, was recovered by a recovery device using granular activated carbon produced from coconut shells, and the recovered solvent was analyzed by gas chromatography to find peaks not present in the new liquid. And
In some cases, the net content of the main component has decreased, and it may not be suitable for reuse. The substances generated by decomposition are 1,1-
Dichloroethylene (hereinafter, HCC-1130a), 1-
Chloro-1-fluoroethylene (hereinafter referred to as HCFC-11
31a) and 1-chloro-1-fluoroethane (hereinafter, HCFC-151a).
A large amount of 30a is produced, which is the main cause of the decrease in the pure content of HCFC-141b. Further, HCC-1130a has a boiling point of 32 ° C., which is almost the same as the boiling point of HCFC-141b, so that it is difficult to separate it when it is decomposed and formed. This poses a serious problem in terms of the safety of the recovery device.
【０００４】一般的に不純物の生成は、活性炭層に吸着
された物質が活性炭中に存在する金属塩やアルカリおよ
びアルカリ土類金属酸化物等の不純物（灰分）の触媒作
用によって吸着成分が分解して生成すると云われてい
る。[0004] Generally, the generation of impurities is caused by the fact that the substance adsorbed on the activated carbon layer is decomposed by the catalytic action of impurities (ash) such as metal salts and alkali and alkaline earth metal oxides present in the activated carbon. It is said to be generated.
【０００５】従来より、反応性に富む溶剤の回収や回収
溶剤を新液レベルで再利用しようとする場合には、活性
炭中に不純物（灰分）が少なく又、触媒性の低い繊維状
活性炭を用いたガス回収装置が使用されている。繊維状
活性炭は、粒状活性炭に比べて非常に高価であるが、
吸、脱着速度が速いので回収装置をコンパクトに出来る
事、さらに触媒性が低い事から回収溶剤を新液レベルで
再利用しようとする場合には有用である。しかし、繊維
状活性炭は、高濃度ガスに対する吸着能が極端に悪く、
例えばＣＦＣ−１１３の代替フロンであるＨＣＦＣ−１
４１ｂのような低沸点型溶剤は、蒸発しやすいので処理
ガスの濃度が高くなり易く、一般的な装置仕様では高回
収率が見込めない問題がある。この為、吸着処理しやす
い好ましい濃度まで処理ガスに希釈空気を加える方法や
繊維状活性炭の充填量を増量して対応する方法或いは、
回収された溶剤中の不純物を分離、精製する装置を付加
する方法等が考えられるが、何れも装置の大型化や重装
備となり実用的ではない。また、これらの方法によって
も高回収率、高品質の溶剤が得られるとは限らない。加
えて、繊維状活性炭は処理ガス中の不純物に対して吸着
能の影響度合いが大きいので短期間で劣化する場合があ
り、劣化時における新品活性炭との交換は連続運転の大
きな障害であり、併せて、交換費用も高額となる等の問
題がある。Conventionally, when recovering a highly reactive solvent or reusing the recovered solvent at a new liquid level, it is necessary to use a fibrous activated carbon having a small amount of impurities (ash) and a low catalytic property in the activated carbon. Used gas recovery equipment is used. Fibrous activated carbon is very expensive compared to granular activated carbon,
Since the absorption and desorption speeds are high, the recovery device can be made compact, and the catalytic activity is low, so that it is useful when the recovered solvent is to be reused at a new liquid level. However, fibrous activated carbon has extremely poor adsorption capacity for high concentration gas,
For example, HCFC-1 which is a substitute for CFC-113
A low-boiling-point solvent such as 41b tends to evaporate easily, so that the concentration of the processing gas tends to be high, and there is a problem that a high recovery rate cannot be expected with general equipment specifications. For this reason, a method of adding dilution air to the processing gas to a preferable concentration that facilitates the adsorption treatment, a method of increasing the filling amount of fibrous activated carbon, or
A method of adding a device for separating and purifying the impurities in the recovered solvent can be considered, but these methods are not practical because the device becomes large and heavy equipment is used. Further, even with these methods, a high recovery rate and a high quality solvent are not always obtained. In addition, fibrous activated carbon has a large influence on the impurities in the processing gas due to the large effect of adsorption capacity, and may deteriorate in a short period of time.Replacement with new activated carbon during deterioration is a major obstacle to continuous operation. Therefore, there is a problem that the replacement cost is high.
【０００６】[0006]
【課題を解決するための手段】本発明者らは、かかる問
題を解決すべく鋭意検討の結果、特定の活性炭を用いる
ことにより活性炭層に吸着されたＨＣＦＣ−１４１ｂの
分解を抑止し、再利用上、問題とならない品質の回収液
が得られることを見出し本発明に到達した。Means for Solving the Problems The inventors of the present invention have conducted intensive studies to solve the above-mentioned problems, and as a result, by using a specific activated carbon, the decomposition of HCFC-141b adsorbed on the activated carbon layer was suppressed, and the HCFC-141b was reused. In addition, the present inventors have found that a recovery liquid having a quality that does not cause any problem can be obtained, and reached the present invention.
【０００７】すなわち本発明は、洗浄装置あるいは蒸留
再生装置等から蒸散したＨＣＦＣ−１４１ｂを含有する
処理ガスを粒状活性炭を充填した活性炭塔で吸着、回収
する方法において、活性炭塔に強熱残分（灰分）２．４
％以下、ＰＨ４．０〜９．０、電導度１５０μＳ以下、
含有塩化物３００ｐｐｍ以下である活性炭を充填するよ
うにしたことを特徴とするＨＣＦＣ−１４１ｂ回収方法
を提供するものである。That is, the present invention relates to a method for adsorbing and recovering a treated gas containing HCFC-141b evaporated from a washing device or a distillation regeneration device in an activated carbon column filled with granular activated carbon, wherein the activated carbon column contains (Ash content) 2.4
%, PH 4.0 to 9.0, conductivity 150 μS or less,
An object of the present invention is to provide a method for recovering HCFC-141b, wherein activated carbon having a chloride content of 300 ppm or less is filled.
【０００８】本発明において用いる活性炭の強熱残分
（灰分）が、２．４％を越えると灰分として含まれる無
機成分の触媒作用により、１１３０ａ等の不純物の生成
量が多くなり好ましく使用できない。強熱残分の好まし
い値は、２．４％以下であり、２．０％以下であればよ
り好ましく使用できる。[0008] If the ignition residue (ash) of the activated carbon used in the present invention exceeds 2.4%, the amount of impurities such as 1130a increases due to the catalytic action of the inorganic component contained as ash, which is not preferable. A preferable value of the residue of the ignition is 2.4% or less, and a value of 2.0% or less can be more preferably used.
【０００９】また、そのＰＨ値が、活性炭中に酸性物質
を多く含む４．０以下の場合や塩基性物質を多く含む
９．０以上の場合は、それらの触媒作用により１１３０
ａ等の不純物の生成量が多くなるので好ましく使用でき
ない。ＰＨの好ましい値は４．０〜９．０であり、５．
５〜８．０であればより好ましく使用できる。When the PH value of the activated carbon is 4.0 or less containing a large amount of an acidic substance or 9.0 or more containing a large amount of a basic substance in activated carbon, 1130 or more is caused by their catalytic action.
Since the amount of impurities such as a increases, it cannot be preferably used. Preferred values of PH are 4.0 to 9.0, and 5.
If it is 5 to 8.0, it can be more preferably used.
【００１０】また、活性炭中に含まれる可溶性でイオン
化する塩類の量的指標となる電導度が、１５０μＳを越
えるとそれら塩類の触媒作用により１１３０ａ等の不純
物の生成量が多くなり好ましく使用できない。電導度の
好ましい値は１５０μＳ以下であり、１００μＳ以下で
あればより好ましく使用できる。On the other hand, if the electric conductivity, which is a quantitative indicator of soluble and ionizable salts contained in the activated carbon, exceeds 150 μS, the amount of impurities such as 1130a increases due to the catalytic action of these salts, which is not preferable. A preferred value of the conductivity is 150 μS or less, and a value of 100 μS or less can be more preferably used.
【００１１】また、含有塩化物が、３００ｐｐｍを越え
ると１１３０ａ等の不純物の生成量が多くなり好ましく
使用できない。含有塩化物の好ましい値は３００ｐｐｍ
以下であり、２００ｐｐｍ以下であればより好ましく使
用できる。On the other hand, if the content of chloride exceeds 300 ppm, the amount of impurities such as 1130a increases, and it cannot be used preferably. Preferred value of contained chloride is 300 ppm
Or less, and more preferably 200 ppm or less.
【００１２】本発明においては、これらの特性値をすべ
て満足していることが必要で、ひとつでもこの範囲外で
あれば、分解抑止効果が低下する。本発明において用い
る活性炭の形状は、球状、ペレット状あるいは、顆粒状
であっても分解抑止が可能であるが、特に４〜６メッシ
ュのペレット状で粒度が揃っている物が好ましい。In the present invention, it is necessary that all of these characteristic values are satisfied. If at least one of the characteristic values is out of this range, the effect of suppressing decomposition is reduced. The shape of the activated carbon used in the present invention can be suppressed even if it is spherical, pellet-like, or granular, but it is particularly preferable to use pellets of 4 to 6 mesh having a uniform particle size.
【００１３】次に本発明の活性炭を用いた回収装置につ
いて詳細に説明する。図１は、本発明を実施するＨＣＦ
Ｃ−１４１ｂ回収装置の１例を示す工程図である。図１
において、１は、ＨＣＦＣ−１４１ｂのガスが発生する
洗浄装置であり、この装置内にＨＣＦＣ−１４１ｂ新液
を所定量投入して、１４１ｂガスを発生させた。発生し
たＨＣＦＣ−１４１ｂのガスは、処理ガスブロアー２で
活性炭塔３ａ、３ｂへ通気され、デミスター７を通って
大気に排出される。活性炭塔内３ａ、３ｂには精製した
活性炭が充填してあり、１４１ｂを含む処理ガスはその
活性炭層を通過するようになっている。この際に処理ガ
ス中に含まれる１４１ｂは活性炭に吸着されてＨＣＦＣ
−１４１ｂを含まない清浄な空気が大気に排出される。
一方、活性炭塔内の活性炭に吸着されたＨＣＦＣ−１４
１ｂは、水蒸気を通気することにより脱着される。脱着
されたＨＣＦＣ−１４１ｂを含む水蒸気は、凝縮器４で
凝縮、液化され、水分離槽５でＨＣＦＣ−１４１ｂ回収
液と水とに分離される。Next, the recovery apparatus using the activated carbon of the present invention will be described in detail. FIG. 1 shows an HCF embodying the present invention.
It is a flowchart showing an example of a C-141b collection device. FIG.
Numeral 1 is a cleaning device that generates HCFC-141b gas. A predetermined amount of a new HCFC-141b solution was charged into the cleaning device to generate 141b gas. The generated gas of HCFC-141b is passed to the activated carbon towers 3a and 3b by the processing gas blower 2, and is discharged to the atmosphere through the demister 7. The activated carbon towers 3a and 3b are filled with purified activated carbon, and the processing gas containing 141b passes through the activated carbon layer. At this time, 141b contained in the processing gas is adsorbed on the activated carbon to form HCFC.
Clean air containing no -141b is exhausted to the atmosphere.
On the other hand, HCFC-14 adsorbed on activated carbon in the activated carbon tower
1b is desorbed by passing steam. The water vapor containing the desorbed HCFC-141b is condensed and liquefied in the condenser 4 and separated in the water separation tank 5 into a recovered HCFC-141b solution and water.
【００１４】本回収装置では、活性炭塔３ａ、３ｂの２
基の活性炭塔により吸着操作と脱着操作を交互に繰り返
し、処理ガス中に含有するＨＣＦＣ−１４１ｂの吸着と
吸着されたＨＣＦＣ−１４１ｂの脱着を自動で切り替え
るシステムとしているので連続運転が可能である。又、
回収装置の吸着率を向上させるために、脱着完了直後の
一時的に高温、多湿状態の活性炭にＨＣＦＣ−１４１ｂ
ガスを供給すると、活性炭の吸着特性上、吸着能が著し
く低下し、大気側にＨＣＦＣ−１４１ｂが排出されるの
で、その対応策として、脱着工程が完了した活性炭塔に
は、冷却乾燥ブロアー６で室内空気を吸い込み活性炭塔
に通気することで強制的に室温近傍まで乾燥、冷却し
て、次の吸着に備えるシステムとしている。In the present recovery apparatus, the activated carbon towers 3a and 3b
The adsorption operation and the desorption operation are alternately repeated by the base activated carbon tower, and the system automatically switches between adsorption of the HCFC-141b contained in the processing gas and desorption of the adsorbed HCFC-141b, so that continuous operation is possible. or,
In order to improve the adsorption rate of the recovery device, HCFC-141b was temporarily added to activated carbon in a high-temperature, high-humidity state immediately after the completion of desorption.
When the gas is supplied, the adsorption performance of the activated carbon is significantly reduced due to the adsorption characteristics of the activated carbon, and HCFC-141b is discharged to the atmosphere side. The system is designed to forcibly dry and cool to near room temperature by sucking indoor air and passing it through the activated carbon tower to prepare for the next adsorption.
【００１５】本発明において、活性炭を充填する活性炭
塔の充填部の高さは最低３８ｃｍ以上必要であり、これ
より塔の高さを低くすると吸着能が低く、高吸着率が望
めない場合があり好ましくない。In the present invention, the height of the packed portion of the activated carbon tower to be filled with activated carbon must be at least 38 cm or more. If the height of the tower is lower than this, the adsorptivity is low, and a high adsorption rate may not be expected. Not preferred.
【００１６】また、活性炭塔へ供する処理ガスは、空塔
速度が０．２〜０．７ｍ／ｓｅｃの範囲がＨＣＦＣ−１
４１ｂの吸着性能が最も高く、この範囲外であっても分
解性及び、吸着特性に何ら影響を与える事は無いが、あ
まり空塔速度が速いと吸着熱により、ＨＣＦＣ−１４１
ｂの分解が促進される可能性がある。又、あまりにも空
塔速度が遅すぎる場合は装置が大型化して実用的でな
い。The processing gas supplied to the activated carbon tower has a superficial velocity in the range of 0.2 to 0.7 m / sec.
The adsorption performance of HCb-41b is the highest, and even if it is outside this range, there is no effect on the decomposability and the adsorption characteristics.
The decomposition of b may be accelerated. On the other hand, if the superficial velocity is too low, the apparatus becomes large in size and is not practical.
【００１７】活性炭に吸着したＨＣＦＣ−１４１ｂの脱
離条件は、一般的な回収装置に使用出来る温度、流量及
び、脱離時間の範囲であれば問題とはならない。本発明
の方法により処理する事の出来るＨＣＦＣ−１４１ｂの
処理濃度は、１０，０００ｐｐｍｖ以下であることが好
ましい。処理濃度がこの範囲を越えている場合には、処
理濃度が好ましい範囲になるよう処理ガスを希釈空気で
希釈して対応出来るので問題はないが、処理ガスの風量
が希釈により増加するので装置を大型化する必要があ
る。The conditions for desorbing HCFC-141b adsorbed on activated carbon are not problematic as long as they are within the range of temperature, flow rate and desorption time which can be used in a general recovery apparatus. The treatment concentration of HCFC-141b that can be treated by the method of the present invention is preferably 10,000 ppmv or less. If the processing concentration exceeds this range, there is no problem because the processing gas can be diluted with dilution air so that the processing concentration is in a preferable range, but there is no problem. It is necessary to increase the size.
【００１８】[0018]
【実施例】本発明の実施例を以下に示すがかかる実施例
に限定されるものではない。 実施例１〜８、比較例１〜７ 処理は種々の物性の活性炭を図１に示す装置に充填し行
った。ＨＣＦＣ−１４１ｂ新液を内容量２５ｌの洗浄装
置に入れ、処理風量＝３Ｎｍ3 ／分、処理ガス濃度＝１
０，０００ｐｐｍｖ、吸着サイクル＝３０分、脱着時間
＝２０分、脱着用水蒸気温度＝１００〜１１５℃、乾燥
冷却時間＝１０分の条件で連続運転した。この結果を表
１、表２に示した。Embodiments of the present invention will be described below, but the present invention is not limited to these embodiments. Examples 1 to 8 and Comparative Examples 1 to 7 The treatment was carried out by charging activated carbon having various physical properties into the apparatus shown in FIG. The new HCFC-141b liquid was put into a washing device having a content of 25 l, and the processing air volume was 3 Nm 3 / min and the processing gas concentration was 1
Continuous operation was performed under the conditions of 000 ppmv, adsorption cycle = 30 minutes, desorption time = 20 minutes, desorption steam temperature = 100 to 115 ° C., and drying / cooling time = 10 minutes. The results are shown in Tables 1 and 2.
【００１９】[0019]
【表１】 [Table 1]
【００２０】[0020]
【表２】 [Table 2]
【００２１】[0021]
【発明の効果】本発明は、ガス回収装置で回収、再利用
しようとする溶剤がＨＣＦＣ−１４１ｂで、活性炭層に
吸着されたＨＣＦＣ−１４１ｂが分解してＨＣＣ−１１
３０ａ等を生成して再利用上問題となるまで純分が低下
する場合や引火性を有する為に回収装置の安全性が問題
となる場合には、本発明て得られた活性炭を用いた回収
方法を使用する事により、従来の一般的な活性炭を用い
た回収機で回収されたＨＣＦＣ−１４１ｂ液に比べて、
ＨＣＦＣ−１４１ｂの分解が抑止できるので、ＨＣＣ−
１１３０ａ等の不純物を含有しない新液と同等品質の回
収液が得られる。このようにして得られた液は、新液と
同様に使用できて、使用量が削減できる。加えて、不純
物の生成抑止は、活性炭の劣化防止にもなり回収率の性
能維持が期待出来る。さらに、ＨＣＣ−１１３０ａ等の
生成防止は回収装置本体の安全性向上にもなるものであ
る。According to the present invention, the solvent to be recovered and reused by the gas recovery apparatus is HCFC-141b, and the HCFC-141b adsorbed on the activated carbon layer is decomposed to form HCC-11.
In the case where 30a or the like is generated and the pure content is reduced until it becomes a problem in reuse, or when the safety of the recovery device becomes a problem due to its flammability, recovery using activated carbon obtained by the present invention is performed. By using the method, compared to the HCFC-141b liquid recovered by a conventional general activated carbon recovery machine,
Since the decomposition of HCFC-141b can be suppressed, HCC-
A recovery liquid having the same quality as a new liquid containing no impurities such as 1130a can be obtained. The liquid thus obtained can be used in the same manner as a new liquid, and the amount of use can be reduced. In addition, the suppression of the generation of impurities also prevents deterioration of the activated carbon, and can maintain the performance of the recovery rate. Furthermore, prevention of generation of HCC-1130a and the like also improves safety of the main body of the recovery device.
【図１】本発明方法を実施するＨＣＦＣ−１４１ｂ回収
装置の工程図を示す。FIG. 1 shows a process diagram of an HCFC-141b recovery apparatus for carrying out the method of the present invention.
１． ＨＣＦＣ−１４１ｂ洗浄装置 ２． 処理ガスブロアー ３ａ．活性炭塔 ３ｂ．活性炭塔 ４． 凝縮器 ５． 水分離槽 ６． 冷却、乾燥ブロアー ７． デミスター 1. 1. HCFC-141b cleaning device Process gas blower 3a. Activated carbon tower 3b. Activated carbon tower Condenser 5. Water separation tank 6. 6. Cooling and drying blower Demister
───────────────────────────────────────────────────── フロントページの続き (72)発明者 阿部 進 岡山県備前市鶴海4125−２ (72)発明者 藤原 盛隆 岡山県岡山市西幸西288 (56)参考文献 特開 平５−192494（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) B01D 53/70 B01D 53/04 B01D 53/34 C01B 31/08 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Susumu Abe 4125-2 Tsuruumi, Bizen City, Okayama Prefecture (72) Moritaka Fujiwara 288 Nishi Konishi, Okayama City, Okayama Prefecture (56) References JP-A-5-192494 (JP) , A) (58) Field surveyed (Int. Cl. 7 , DB name) B01D 53/70 B01D 53/04 B01D 53/34 C01B 31/08
Claims (1)
散したＨＣＦＣ−１４１ｂを含有する処理ガスを粒状活
性炭を充填した活性炭塔で吸着、回収するに際して、活
性炭塔に強熱残分（灰分）２．４％以下、ＰＨ４．０〜
９．０、電導度１５０μＳ以下、含有塩化物３００ｐｐ
ｍ以下である活性炭を充填するようにしたことを特徴と
するＨＣＦＣ−１４１ｂ回収方法。1. When a treated gas containing HCFC-141b evaporated from a washing device or a distillation regeneration device is adsorbed and collected by an activated carbon column filled with granular activated carbon, a residue on ignition (ash content) in the activated carbon column. 4% or less, PH 4.0-
9.0, conductivity 150μS or less, chloride content 300pp
m. The method for recovering HCFC-141b, characterized in that activated carbon not more than m is filled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5014059A JP3051002B2 (en) | 1993-01-29 | 1993-01-29 | HCFC-141b recovery method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5014059A JP3051002B2 (en) | 1993-01-29 | 1993-01-29 | HCFC-141b recovery method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06226045A JPH06226045A (en) | 1994-08-16 |
| JP3051002B2 true JP3051002B2 (en) | 2000-06-12 |
Family
ID=11850523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5014059A Expired - Fee Related JP3051002B2 (en) | 1993-01-29 | 1993-01-29 | HCFC-141b recovery method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3051002B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110817873A (en) * | 2019-11-26 | 2020-02-21 | 江苏京颐环保科技有限公司 | Activated carbon activation and regeneration device and method |
-
1993
- 1993-01-29 JP JP5014059A patent/JP3051002B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06226045A (en) | 1994-08-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3876393A (en) | Method and article for removing mercury from gases contaminated therewith | |
| RU2153923C2 (en) | Method of isolating substances from a gaseous medium involving dry adsorption technique | |
| US4285918A (en) | Regenerative CO2 absorbent | |
| JP2019136640A (en) | Method for determining performance recovery possibility of active charcoal, active charcoal regeneration method and active charcoal reuse system | |
| US20040076569A1 (en) | Decomposition of fluorine containing compounds | |
| US6225256B1 (en) | Activated carbon feedstock | |
| JP3051002B2 (en) | HCFC-141b recovery method | |
| CN106540510A (en) | It is a kind of can Detachment Activity charcoal fluidised bed adsorption dichloroethanes technique | |
| JP3132962B2 (en) | Method for producing modified activated carbon | |
| JP3909599B2 (en) | Oil desorption method | |
| JPH0671130A (en) | Apparatus for treating gas containing vapor of water-soluble organic substance | |
| JPH05201893A (en) | Method for purifying 1,1,1,2-tetrafluoroethane | |
| JP3353894B2 (en) | Purification of 1,1,1,2-tetrafluoroethane | |
| JP2007144319A (en) | Electrostatic type chlorofluorocarbon reproduction device | |
| JP2002087808A (en) | Adsorbent for purifying perfluorocarbon, manufacturing method thereof, high purity octafluorocyclobutane, method of purifying and manufacturing the same and utilization thereof | |
| JPH0624624B2 (en) | Adsorbent for gaseous organic halogen compounds | |
| RU2105744C1 (en) | Method for reactivation of worked out activated coal of recuperation of steam of alcohol-ether solvent system | |
| JP3993800B2 (en) | Method for treating PCB-containing exhaust gas | |
| JP4690953B2 (en) | Vacuum heating device with oil scrubber cleaning oil backflow prevention tank | |
| JP2006255498A (en) | Recovery method of hydrofluoroether | |
| JPH10249157A (en) | Chlorofluorocarbon recovering method | |
| JP2002035541A (en) | Method for recovering alcohols, etc., from waste gas | |
| JP3486767B2 (en) | Apparatus and method for removing harmful substances in exhaust gas and activated carbon for removing harmful substances | |
| EP0473850B1 (en) | Method of recovering hydrocarbon halide | |
| TW546161B (en) | Method for regeneration of exhaust absorbing and treating system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |