JPH0448903A - Method for drying article - Google Patents
Method for drying articleInfo
- Publication number
- JPH0448903A JPH0448903A JP15706190A JP15706190A JPH0448903A JP H0448903 A JPH0448903 A JP H0448903A JP 15706190 A JP15706190 A JP 15706190A JP 15706190 A JP15706190 A JP 15706190A JP H0448903 A JPH0448903 A JP H0448903A
- Authority
- JP
- Japan
- Prior art keywords
- ion exchange
- exchange resin
- regeneration
- water
- dehydration
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000001035 drying Methods 0.000 title claims abstract description 20
- 239000003456 ion exchange resin Substances 0.000 claims abstract description 43
- 229920003303 ion-exchange polymer Polymers 0.000 claims abstract description 43
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 claims abstract description 40
- 239000002904 solvent Substances 0.000 claims abstract description 30
- 150000008280 chlorinated hydrocarbons Chemical class 0.000 claims abstract description 29
- 238000001816 cooling Methods 0.000 claims description 10
- 238000004064 recycling Methods 0.000 claims description 4
- 230000008929 regeneration Effects 0.000 abstract description 35
- 238000011069 regeneration method Methods 0.000 abstract description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 35
- 239000007789 gas Substances 0.000 abstract description 33
- 230000018044 dehydration Effects 0.000 abstract description 29
- 238000006297 dehydration reaction Methods 0.000 abstract description 29
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 10
- 230000001172 regenerating effect Effects 0.000 abstract description 10
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical group ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 abstract description 8
- 239000011347 resin Substances 0.000 abstract description 6
- 229920005989 resin Polymers 0.000 abstract description 6
- UOCLXMDMGBRAIB-UHFFFAOYSA-N 1,1,1-trichloroethane Chemical compound CC(Cl)(Cl)Cl UOCLXMDMGBRAIB-UHFFFAOYSA-N 0.000 abstract description 4
- 239000011261 inert gas Substances 0.000 abstract description 3
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 3
- UBOXGVDOUJQMTN-UHFFFAOYSA-N trichloroethylene Natural products ClCC(Cl)Cl UBOXGVDOUJQMTN-UHFFFAOYSA-N 0.000 abstract description 3
- 238000005342 ion exchange Methods 0.000 abstract description 2
- 208000005156 Dehydration Diseases 0.000 description 26
- 238000001179 sorption measurement Methods 0.000 description 11
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 4
- 229910001873 dinitrogen Inorganic materials 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- SCYULBFZEHDVBN-UHFFFAOYSA-N 1,1-Dichloroethane Chemical compound CC(Cl)Cl SCYULBFZEHDVBN-UHFFFAOYSA-N 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000004063 acid-resistant material Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 150000001721 carbon Chemical class 0.000 description 1
- 239000003729 cation exchange resin Substances 0.000 description 1
- 229940023913 cation exchange resins Drugs 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000011437 continuous method Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000007791 dehumidification Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 1
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Treatment Of Liquids With Adsorbents In General (AREA)
- Extraction Or Liquid Replacement (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
Description
【発明の詳細な説明】
イ）発明の目的
〔産業上の利用分野〕
本発明は、塩素化炭化水素系溶剤を用いて、物品に付着
した水分を脱水し乾燥する方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION A) Object of the Invention [Industrial Field of Application] The present invention relates to a method for removing water adhering to an article and drying it using a chlorinated hydrocarbon solvent.
トリクロロエチレンまたはｌ、１．１）リクロロエタン
等の塩素化炭化水素系溶剤を用いて、各種の金属製部品
その他の物品を乾燥する方法はすでに実用に供されてお
り、またこれに使用される脱水用組成物例えば塩素化炭
化水素系溶剤にアルコールや界面活性剤等を配合した組
成物も知られているが、脱水乾燥に使用された塩素化炭
化水素系溶剤は水分を吸収し、次第に含有量が増加する
水分は、物品に鯖を発生させる原因となる。また１収水
分と塩素化炭化水素系溶剤は、熱その他の要因により化
学反応を起こして塩酸を生成し、脱水乾燥装置や乾燥す
べき物品の素材である金属を腐食する等の悪影響を及ぼ
す、といった問題がある。Methods for drying various metal parts and other articles using chlorinated hydrocarbon solvents such as trichlorethylene or 1.1) dichloroethane are already in practical use, and dehydration methods used for this method are For example, compositions made by blending alcohol, surfactants, etc. with chlorinated hydrocarbon solvents are also known, but the chlorinated hydrocarbon solvents used for dehydration and drying absorb moisture and gradually reduce their content. The increased moisture content causes mold to appear on the product. In addition, due to heat and other factors, the water content and chlorinated hydrocarbon solvent can cause a chemical reaction to produce hydrochloric acid, which can have negative effects such as corroding the dehydration drying equipment and the metals that are the materials of the items to be dried. There are problems like this.
水分を吸収した塩素化炭化水素系溶剤の脱水力法として
は種々の方法があるが、作業環境上あるいは省エネルギ
ーの観点から、イオン交樹脂による吸着脱水法が有利で
ある。Although there are various methods for dehydrating chlorinated hydrocarbon solvents that have absorbed water, adsorption dehydration using an ion exchange resin is advantageous from the viewpoint of working environment and energy saving.
イオン交樹脂による吸着脱水法において、水分岐着後の
イオン交樹脂を再生する方法としては、例えば特公昭４
６−２８５２２号公報および特公昭４５−１１７３号公
報に記載の方法があるが、再生効率を高めるために、塩
素化炭化水素系溶剤の分解温度以上でイオン交樹脂の乾
燥再生が行なわれる結果、水分と共に吸着された微量の
塩素化炭化水素系溶剤が吸着水分と反応して塩酸を生じ
、装置等の腐食の原因となり、従って高価な素材の装置
を用いる必要がある。In the adsorption dehydration method using an ion exchange resin, methods for regenerating the ion exchange resin after water branching and adsorption include, for example,
There are methods described in Japanese Patent Publication No. 6-28522 and Japanese Patent Publication No. 45-1173, but in order to increase the regeneration efficiency, the ion exchange resin is dried and regenerated at a temperature higher than the decomposition temperature of the chlorinated hydrocarbon solvent. A trace amount of the chlorinated hydrocarbon solvent adsorbed together with the water reacts with the adsorbed water to produce hydrochloric acid, which causes corrosion of equipment, etc., and therefore requires the use of equipment made of expensive materials.
またイオン交樹脂を再生に使用され再生用循環ガスから
、水分および塩素化炭化水素系溶剤を離脱させるため、
ガスの冷却処理が行われるが、冷却後のガス中に残存す
る塩素化炭化水素系溶剤の濃度は高く、これを大気中に
放出すれば環境面で問題となり、またこれを循環使用す
る連続方式の場合には、循環ガスを更に除湿をするため
の除湿吸着器を装備する必要があり、再生システムが複
雑で費用が寓む等、未だ工業的に満足する方法は見出さ
れていない。In addition, in order to remove water and chlorinated hydrocarbon solvents from the regeneration circulating gas when the ion exchange resin is used for regeneration,
The gas is cooled, but the concentration of chlorinated hydrocarbon solvents remaining in the gas after cooling is high, and releasing this into the atmosphere would pose an environmental problem.Also, a continuous method that recycles and uses it is not recommended. In this case, it is necessary to equip a dehumidifying adsorption device to further dehumidify the circulating gas, and the regeneration system is complicated and expensive, so no method that is industrially satisfactory has yet been found.
物品の脱水乾燥に用いられた塩素化炭化水素系溶剤は、
４００ｐｐｍ以上から数千ｐｐｍにも達する多量の水分
を吸収しているが、本発明者らは、これをイオン交樹脂
で脱水し、かつ水分を吸着したイオン交樹脂を再生する
物品の乾燥方法につき鋭意研究した結果、本発明を完成
した。The chlorinated hydrocarbon solvent used for dehydrating and drying the product is
A large amount of water is absorbed, ranging from more than 400 ppm to several thousand ppm, but the present inventors have developed a drying method for articles that dehydrates this with an ion exchange resin and regenerates the ion exchange resin that has absorbed water. As a result of intensive research, the present invention was completed.
口）発明の構成
（課題を解決する為の手段〕
本発明は、塩素化炭化水素系溶剤を用いて、物品に付着
した水分を脱水し乾燥する方法において、水分を吸収し
た塩素化炭化水素系溶剤をイオン交樹脂と接触させ、水
分を吸着したイオン交樹脂を、５０℃〜９０℃の再使用
循環ガスと接触させ、次いで再生用循環ガスを０℃〜１
２℃に冷却して凝縮液を分離した後、再生用循環ガスを
再度循環使用し、イオン交樹脂と接触させることを特徴
とする物品の乾燥方法である。(1) Structure of the invention (Means for solving the problem) The present invention provides a method for dehydrating and drying moisture adhering to an article using a chlorinated hydrocarbon solvent. A solvent is brought into contact with an ion exchange resin, and the ion exchange resin that has adsorbed water is brought into contact with a reused circulating gas at a temperature of 50°C to 90°C, and then a regeneration circulating gas is brought into contact with a temperature of 0°C to 1°C.
This method of drying an article is characterized in that after cooling to 2° C. and separating the condensate, the recycling gas for regeneration is recycled and brought into contact with the ion exchange resin.
本発明における物品の脱水乾燥工程は、既に知られてい
るいずれの方法によって行われる。また脱水乾燥工程に
より水分を吸収した塩素化炭Ｊ’′（素系熔荊は、各種
のイオン交樹脂、例えば強酸性陽イオン交樹脂と接触さ
せる。この工程も従来知られている、イオン交樹脂によ
る脱水処理操作の方法と条件に従って行えばよい。The step of dehydrating and drying the article in the present invention is performed by any known method. In addition, the chlorinated carbon J'' that has absorbed moisture through the dehydration and drying process is brought into contact with various ion exchange resins, such as strongly acidic cation exchange resins. This may be carried out according to the method and conditions for dehydration treatment using resin.
脱水乾燥工程において、塩素化炭化水素系溶剤中の多量
の水分を吸着したイオン交樹脂は、これを再生用循環ガ
スと接触させることにより、吸着水分を離脱させる。イ
オン交樹脂の再生用循環ガスとしては、一般に用いられ
ている窒素等の不活性ガスや空気が挙げられるが、安全
性の面から窒素等の不活性ガスが好ましい。In the dehydration drying step, the ion exchange resin that has adsorbed a large amount of water in the chlorinated hydrocarbon solvent is brought into contact with the regeneration circulating gas to remove the adsorbed water. Examples of the circulating gas for regenerating the ion exchange resin include commonly used inert gases such as nitrogen, and air, but in terms of safety, inert gases such as nitrogen are preferred.
イオン交樹脂の再生に使用される循環ガスの温度は、５
０℃〜９０℃でなければならない、温度が９０℃より高
いと、イオン交樹脂に吸着された水分と塩素化炭化水素
系溶剤が、熱風により化学変化を起こして塩化水素を生
成し、装置の腐食が起こり、一方温度が５０℃より低い
と脱水が充分に行われない、塩素化炭化水素系溶剤のう
ち、特に１．１．１−トリクロロエタンの脱水に使用さ
れたイオン交樹脂を対象とする場合、再生用循環ガスの
温度は５０℃〜７０℃さらには５８℃〜６５℃が好まし
く、またトリクロロエチレンの脱水に使用されたイオン
交樹脂の場合は、７０℃〜９０℃さらには７５℃〜８５
℃が好ましい。The temperature of the circulating gas used to regenerate the ion exchange resin is 5
Must be between 0°C and 90°C. If the temperature is higher than 90°C, the water and chlorinated hydrocarbon solvents adsorbed on the ion exchange resin will undergo chemical changes due to the hot air, producing hydrogen chloride, which will damage the equipment. Among chlorinated hydrocarbon solvents that cause corrosion and do not fully dehydrate when the temperature is lower than 50°C, this target is particularly aimed at ion exchange resins used in the dehydration of 1.1.1-trichloroethane. In this case, the temperature of the regeneration circulating gas is preferably 50°C to 70°C, more preferably 58°C to 65°C, and in the case of the ion exchange resin used for dehydration of trichlorethylene, the temperature is 70°C to 90°C, and more preferably 75°C to 85°C.
°C is preferred.
本発明においては、イオン交樹脂と接触後の再生用循環
ガスをＯ′Ｃ〜１２℃、好ましくは３℃〜５℃に冷却し
、ガス中の水分および塩素化炭化水素系溶剤を凝縮させ
、凝縮液の分離を通常の気液分動操作により行った後、
再生用循環ガスを循環使用する。In the present invention, the regeneration circulating gas after contact with the ion exchange resin is cooled to O'C to 12°C, preferably 3°C to 5°C, to condense moisture and chlorinated hydrocarbon solvent in the gas, After separating the condensate by normal gas-liquid separation operation,
Recycling gas for regeneration is used.
再生用循環ガスの冷却温度が０“Ｃ未満では、凝縮液中
の水分の凍結による、配管の閉塞等の問題が生し、また
冷却に過剰のエネルギーを消費する点で、経済的に不利
であり、１２℃を鰯えると循環する再生用循環ガス中の
水分の凝縮が充分行われないため、再生用循環ガス中の
水分濃度が低下せず、これを再循環して連続的にイオン
交樹脂の再生処理を行おうとしても、効率的な再生を望
めず、また該循環ガスを系外に廃棄する場合には環境上
の問題が生じる。If the cooling temperature of the circulating gas for regeneration is less than 0"C, problems such as pipe blockage may occur due to freezing of water in the condensate, and excessive energy is consumed for cooling, which is economically disadvantageous. However, when the temperature reaches 12°C, the moisture in the circulating regeneration gas does not condense sufficiently, so the water concentration in the regeneration circulation gas does not decrease, and it is recirculated to continuously exchange ions. Even if an attempt is made to regenerate the resin, efficient regeneration cannot be expected, and environmental problems arise when the circulating gas is disposed of outside the system.
再生用循環ガスを冷却する際、急冷すると局所的に過冷
却され、冷却器へ氷が付着する場合があり、これを避け
るために予備冷却を行うことは、より効率的な方法であ
る。When cooling the regenerating circulating gas, rapid cooling may result in local supercooling and ice may adhere to the cooler.To avoid this, a more efficient method is to pre-cool the gas.
本発明は上記の如く、脱水乾燥工程で水分を吸収した、
１，１．１−）リクロロエタンおよびトリクロロエチレ
ンその他の塩素化炭化水素系溶剤から、水分を除去する
ために使用されたイオン交樹脂から、吸着水分を離脱さ
せてイオン交樹脂を再生する工程を、連続的にを利に行
い得る物品の乾燥方法である。イオン交樹脂の再生を従
来の方法で連続的に行おうとすれば、脱水後の再生用循
環ガスの冷却が充分でないため除湿吸着装置を必要とし
、複雑な再生システムで行わざるを得ないが、再生後の
循環ガスをＯ′Ｃ〜１２℃に冷却することにより、除湿
吸着装置は不要となる。As described above, the present invention is characterized by absorbing moisture in the dehydration and drying process.
1,1.1-) A step of regenerating the ion exchange resin by removing adsorbed moisture from the ion exchange resin used to remove moisture from the chlorinated hydrocarbon solvents such as dichloroethane and trichloroethylene, This is a method of drying articles that can be carried out continuously. If you try to continuously regenerate the ion exchange resin using the conventional method, you will need a dehumidifying and adsorption device because the regenerating circulating gas after dehydration is not sufficiently cooled, and you will have to use a complicated regeneration system. By cooling the regenerated circulating gas to O'C to 12C, a dehumidification/adsorption device is not required.
本発明において、脱水再生の対象となるイオン交樹脂が
、高濃度の水分を含有する塩素化炭化水素系溶剤から吸
着した、多量の水分を含有しているものであるにもかか
わらず、凝縮液を分緬後の再生用循環ガスの相対湿度は
、意外なことに僅か０．７〜０．８％程度と極めて低く
、そのまま加温して再生に再使用することができ、再生
後のイオン交樹脂は長時間にわたって高い脱水能力を維
持しており、本発明の方法は非常に経済的であり、また
環境上の問題もない。In the present invention, although the ion exchange resin to be dehydrated and regenerated contains a large amount of water adsorbed from a chlorinated hydrocarbon solvent containing a high concentration of water, the condensate Surprisingly, the relative humidity of the circulating gas for regeneration after separation is extremely low at only 0.7 to 0.8%, so it can be heated as is and reused for regeneration, and the ions after regeneration are The cross-resin maintains a high dewatering capacity over a long period of time, making the process of the invention very economical and without any environmental problems.
また本発明によれば、イオン交樹脂再生装置の材質につ
いて懸念する必要がなく、例えばオーステナイト系のス
テンレス鋼等を用いれば十分であるが、塩素化炭化水素
系溶剤の中でも安定性が比較的低い、ｌ、１．１−）リ
クロロエタンの脱水に使用されたイオン交樹脂を再生す
る場合には、竪着塔、凝縮タンクに耐酸処理を施したり
、再生用循環ガスの冷却器に耐酸材を用いることが好ま
しい。Furthermore, according to the present invention, there is no need to worry about the material of the ion exchange resin regeneration device; for example, it is sufficient to use austenitic stainless steel, etc., but the stability is relatively low even among chlorinated hydrocarbon solvents. , l, 1.1-) When regenerating the ion exchange resin used in the dehydration of rechloroethane, it is necessary to apply acid-resistant treatment to the column tower and condensation tank, and to add acid-resistant materials to the cooler for the circulating gas for regeneration. It is preferable to use
以下実施例、比較例に基づき、本発明をさらに詳細に説
明する。The present invention will be explained in more detail below based on Examples and Comparative Examples.
実施例１〜２、比較例１〜３
塩素化炭化水素系溶剤として１．１．Ｉ−）リクロロエ
タンを用いて、常法に従い金属製物品の脱水乾燥を行っ
た。Examples 1-2, Comparative Examples 1-3 1.1. I-) Using dichloroethane, the metal article was dehydrated and dried according to a conventional method.
イオン交樹脂〔ダイヤイオン５ＫＩＢ：三菱化成工業株
製］２ＩＶ、が充填された内容積ｌｏＰ、の水分咬着塔
に、脱水乾燥に使用した後の、４５０ｐｐｍの水分を含
有する１、１．１−トリクロロエタンを、２（ｌｅ／ｈ
ｒの流速で３４時間供給し脱水を行った後、イオン交樹
脂の再生を開始した。1,1.1 containing 450 ppm of water after being used for dehydration and drying in a moisture trapping tower with internal volume loP filled with ion exchange resin [Diaion 5KIB: manufactured by Mitsubishi Chemical Industries, Ltd.] 2IV. -Trichloroethane at 2 (le/h
After dehydration by supplying water at a flow rate of r for 34 hours, regeneration of the ion exchange resin was started.
脱水により咬着した水分は約２００ｇ／’ｌ（イオン交
樹脂基！１りであった。なお、脱水および再生装置は５
ＵＳ３０４製である。The amount of water absorbed during dehydration was approximately 200 g/'l (ionic exchange resin base!1).The dehydration and regeneration equipment was
Made of US304.
再生用循環ガスとして、第１表記載の温度に加熱した窒
素ガスを用い、これを６ Ｎ＋ｗ”／ｌｒの流量で水分
吸着塔に供給して、イオン交樹脂と接触させ、水分吸着
塔から排出される窒素ガスを第１表記載の温度に冷却し
、主として水からなる凝縮液を分離し、分離後の窒素ガ
スを再加熱して水分吸着塔に循環する方法によって、イ
オン交樹脂の再生を７時間連続して行った。As the circulating gas for regeneration, nitrogen gas heated to the temperature listed in Table 1 is used, and this is supplied to the moisture adsorption tower at a flow rate of 6 N+w''/lr, brought into contact with the ion exchange resin, and discharged from the moisture adsorption tower. The ion exchange resin is regenerated by cooling the nitrogen gas to the temperature listed in Table 1, separating the condensate mainly consisting of water, and reheating the separated nitrogen gas and circulating it to the moisture adsorption tower. It went on for 7 hours straight.
再生終了時の、装置の状態および凝縮液のＰ Ｈは、第
１表に記載のとおりであった。At the end of the regeneration, the condition of the apparatus and the pH of the condensate were as shown in Table 1.
イオン交樹脂を上記のようにして再生した後の水分吸着
塔に、同じ＜４５０ｐｐｍの水分を含有する１、１．ｌ
−トリクロロエタンを、２０１／ｈｒの流速で連続供給
して脱水を行い、１．１．ｔトリクロロエタン中の含有
水分量の経時変化を測定した。その結果を第２表に示す
。After the ion exchange resin was regenerated as described above, the water adsorption tower contained 1, 1. l
- Trichloroethane is continuously supplied at a flow rate of 201/hr to perform dehydration, 1.1. The change in water content in trichloroethane over time was measured. The results are shown in Table 2.
実施例３〜５、比較例４〜６
実施例１と同様に、金属製物品の脱水乾燥に用いた後の
、水分含装置が５５００ｐｐｍのトリクロロエチレンを
、水分吸着塔に１０４！／ｈｒの流速で５時間供給し脱
水を行った。脱水により吸着した水分は約２００ｇ／ｌ
（イオン交樹脂基準）であった。Examples 3 to 5, Comparative Examples 4 to 6 In the same manner as in Example 1, after being used for dehydration and drying of metal articles, the moisture content device transferred trichlorethylene with a concentration of 5500 ppm to a moisture absorption tower of 104%. Dehydration was carried out by supplying water at a flow rate of /hr for 5 hours. Water absorbed by dehydration is approximately 200g/l
(ion exchange resin standard).
窒素ガスの加熱および冷却温度を第３表記載の温度とし
た以外は、実施例１と同様にして、吸着水分の除去とイ
オン交樹脂の再生を、７時間連続して行った。The removal of adsorbed water and the regeneration of the ion exchange resin were carried out continuously for 7 hours in the same manner as in Example 1, except that the heating and cooling temperatures of nitrogen gas were set to the temperatures listed in Table 3.
再生終了時の、装置の状態および凝縮液のＰＨは、第３
表に記載のとおりであった。At the end of regeneration, the condition of the device and the pH of the condensate are as follows:
It was as described in the table.
上記のようにしてイオン交樹脂を再生した後の水分吸着
塔に、同じ＜５５００ｐｐｍの水分を含有するトリクロ
ロエチレンを、１０１／ｈｒの流速で連続供給して脱水
を行い、トリクロロエチレン中の含有水分量の経時変化
を測定した。その結果を第４表に示す。After the ion exchange resin has been regenerated as described above, trichlorethylene containing <5500 ppm of water is continuously supplied to the water adsorption tower at a flow rate of 101/hr to perform dehydration. Changes over time were measured. The results are shown in Table 4.
−信９−
ハ）発明の効果
本発明によれば、物品の脱水乾燥に使用した後の、水分
を含有する１、１．１−トリクロロエタンおよびトリク
ロロエチレンその他の塩素化炭化水素系溶剤を、イオン
交樹脂と接触させることによって、塩素化炭化水素系溶
剤中の水分を容易にかつ効率良く除去することができ、
水分を吸着したイオン交樹脂の再生時に、塩素化炭化水
素系溶剤の分解による塩酸の発生を防止し、装置等を腐
食することなく再生を行うことを可能とし、またイオン
交樹脂と接触さセた後の再生用循環ガスを、簡単な処１
により再循環させることにより、再生の連Ｍｌｉ業を可
能とし、さらに脱水と再生との連続操業が可能であり、
しかも再生後のイオン交樹脂は、長時間にわたって高い
脱水能力を保持しており、工業的にも経済的にも、さら
に環境的見地からも、Ｊｉ常に優れた方法である。-Communication 9- c) Effects of the Invention According to the present invention, 1,1,1-trichloroethane, trichlorethylene and other chlorinated hydrocarbon solvents containing water after being used for dehydration and drying of articles are removed by ion exchange. By contacting with the resin, water in the chlorinated hydrocarbon solvent can be easily and efficiently removed.
When regenerating ion exchange resins that have absorbed water, it prevents the generation of hydrochloric acid due to decomposition of chlorinated hydrocarbon solvents, making it possible to perform regeneration without corroding equipment, etc. The recycled gas for regeneration after
By recirculating the water, it is possible to perform a continuous process of regeneration, and furthermore, continuous operation of dehydration and regeneration is possible.
Moreover, the ion exchange resin after regeneration maintains high dehydration ability for a long period of time, and Ji is always an excellent method from an industrial, economical, and environmental standpoint.
また、本発明では、再生用循環ガスを系外に排出するこ
となく、塩素化炭化水素系溶剤の脱水とイオン交樹脂の
再生を繰り返しつつ、物品の脱水乾燥を行うことができ
、再生用循環ガスの浪費が防止されるとともに、これを
系外に放出する場合の、塩素化炭化水素系溶剤の回収操
作および損失といった問題も解消される。In addition, in the present invention, it is possible to dehydrate and dry the article while repeating dehydration of the chlorinated hydrocarbon solvent and regeneration of the ion exchange resin without discharging the regeneration circulation gas outside the system. Waste of gas is prevented, and problems such as recovery operations and losses of the chlorinated hydrocarbon solvent when the gas is discharged outside the system are also eliminated.
Claims (1)
分を脱水し乾燥する方法において、水分を吸収した塩素
化炭化水素系溶剤をイオン交換樹脂と接触させ、水分を
吸着したイオン交換樹脂を、５０℃〜９０℃の再生用循
環ガスと接触させ、次いで再生用循環ガスを０℃〜１２
℃に冷却して凝縮液を分離した後、再生用循環ガスを再
度循環使用し、イオン交樹脂と接触させることを特徴と
する物品の 乾燥方法。[Claims] 1. In a method of dehydrating and drying moisture adhering to an article using a chlorinated hydrocarbon solvent, the chlorinated hydrocarbon solvent that has absorbed moisture is brought into contact with an ion exchange resin, and the moisture is removed. The ion exchange resin adsorbed with
A method for drying an article, which comprises cooling the article to ℃ and separating the condensate, and then recycling the recycling gas again and bringing it into contact with the ion exchange resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15706190A JPH0448903A (en) | 1990-06-15 | 1990-06-15 | Method for drying article |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15706190A JPH0448903A (en) | 1990-06-15 | 1990-06-15 | Method for drying article |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0448903A true JPH0448903A (en) | 1992-02-18 |
Family
ID=15641357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15706190A Pending JPH0448903A (en) | 1990-06-15 | 1990-06-15 | Method for drying article |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0448903A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05177102A (en) * | 1991-12-27 | 1993-07-20 | Japan Field Kk | Removal of moisture bonded to article to be washed |
-
1990
- 1990-06-15 JP JP15706190A patent/JPH0448903A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05177102A (en) * | 1991-12-27 | 1993-07-20 | Japan Field Kk | Removal of moisture bonded to article to be washed |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| SU786860A3 (en) | Method of gas drying | |
| US2992895A (en) | Process for recovering oxides of nitrogen and sulfur from gaseous mixtures | |
| KR101170891B1 (en) | Removal of carbon dioxide from flue gas with ammonia comprising medium | |
| JP6310907B2 (en) | Recovering and recovering pollutants from exhaust gas | |
| JP3535320B2 (en) | Method for recovering reaction gas when oxidizing HCl to obtain chlorine | |
| KR20190126184A (en) | Regenerative recovery of sulfur dioxide from effluent gases | |
| JPH07506383A (en) | How to remove hydrocarbons from polymer slurry | |
| RU2018140500A (en) | SULPHATE REMOVAL FROM ANION EXCHANGE RESIN SOLVENTS | |
| CN102658000A (en) | Method and absorption solvent for removing sulfur dioxide from flue gas | |
| JPH0233645B2 (en) | ||
| US4399111A (en) | Process for removal of sour gases by scrubbing | |
| JP4298264B2 (en) | Methods for drying hydrocarbon streams | |
| JPH0448903A (en) | Method for drying article | |
| US3708955A (en) | Method for drying gases | |
| JP2625993B2 (en) | Regeneration method of ion exchange resin | |
| JPS61168506A (en) | Production of sulfuric trioxide from fuming sulfuric acid | |
| RU2087181C1 (en) | Method of removing acidic gases such as hydrogen sulfide and/or carbon dioxide | |
| JP2625996B2 (en) | Regeneration method of ion exchange resin | |
| JPS5820224A (en) | Removal of mercury in gas | |
| JP3010463B2 (en) | How to remove water from alcohol | |
| JPH0824818B2 (en) | Exhaust gas purification method | |
| CN111408238B (en) | Material recycling device and method for preparing ethylene glycol from synthesis gas | |
| JPS5851881B2 (en) | Oxygen recycling ozone generation method and generator | |
| US2875848A (en) | Method of preparation of sulfur dioxide | |
| JPS632883B2 (en) |