JPH04256402A - Method for removing combustible solvent from article surface - Google Patents
Method for removing combustible solvent from article surfaceInfo
- Publication number
- JPH04256402A JPH04256402A JP1415491A JP1415491A JPH04256402A JP H04256402 A JPH04256402 A JP H04256402A JP 1415491 A JP1415491 A JP 1415491A JP 1415491 A JP1415491 A JP 1415491A JP H04256402 A JPH04256402 A JP H04256402A
- Authority
- JP
- Japan
- Prior art keywords
- solvent
- article
- flammable
- vapor
- combustible
- 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.)
- Withdrawn
Links
- 239000002904 solvent Substances 0.000 title claims abstract description 127
- 238000000034 method Methods 0.000 title claims description 20
- 150000001298 alcohols Chemical class 0.000 claims abstract description 4
- 150000002148 esters Chemical class 0.000 claims abstract description 4
- 229930195733 hydrocarbon Natural products 0.000 claims abstract description 4
- 150000002430 hydrocarbons Chemical class 0.000 claims abstract description 4
- 150000002576 ketones Chemical class 0.000 claims abstract description 4
- 238000009835 boiling Methods 0.000 claims description 20
- 239000000126 substance Substances 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 2
- 238000009834 vaporization Methods 0.000 abstract description 3
- 230000008016 vaporization Effects 0.000 abstract description 3
- 238000001035 drying Methods 0.000 description 7
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 6
- 238000001704 evaporation Methods 0.000 description 5
- 230000008020 evaporation Effects 0.000 description 5
- 238000004880 explosion Methods 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- UOCLXMDMGBRAIB-UHFFFAOYSA-N 1,1,1-trichloroethane Chemical compound CC(Cl)(Cl)Cl UOCLXMDMGBRAIB-UHFFFAOYSA-N 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 3
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- AJDIZQLSFPQPEY-UHFFFAOYSA-N 1,1,2-Trichlorotrifluoroethane Chemical compound FC(F)(Cl)C(F)(Cl)Cl AJDIZQLSFPQPEY-UHFFFAOYSA-N 0.000 description 2
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical group ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000004821 distillation Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004817 gas chromatography Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 2
- ZJIJAJXFLBMLCK-UHFFFAOYSA-N perfluorohexane Chemical compound FC(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F ZJIJAJXFLBMLCK-UHFFFAOYSA-N 0.000 description 2
- RVZRBWKZFJCCIB-UHFFFAOYSA-N perfluorotributylamine Chemical compound FC(F)(F)C(F)(F)C(F)(F)C(F)(F)N(C(F)(F)C(F)(F)C(F)(F)C(F)(F)F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F RVZRBWKZFJCCIB-UHFFFAOYSA-N 0.000 description 2
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- LOJJTTDNNWYSGX-UHFFFAOYSA-N 1,1,1,2,2,3,3,4,4-nonafluoro-4-(1,1,2,2,3,3,4,4,4-nonafluorobutoxy)butane Chemical compound FC(F)(F)C(F)(F)C(F)(F)C(F)(F)OC(F)(F)C(F)(F)C(F)(F)C(F)(F)F LOJJTTDNNWYSGX-UHFFFAOYSA-N 0.000 description 1
- NTIZESTWPVYFNL-UHFFFAOYSA-N Methyl isobutyl ketone Chemical compound CC(C)CC(C)=O NTIZESTWPVYFNL-UHFFFAOYSA-N 0.000 description 1
- UIHCLUNTQKBZGK-UHFFFAOYSA-N Methyl isobutyl ketone Natural products CCC(C)C(C)=O UIHCLUNTQKBZGK-UHFFFAOYSA-N 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- JMMWKPVZQRWMSS-UHFFFAOYSA-N isopropanol acetate Natural products CC(C)OC(C)=O JMMWKPVZQRWMSS-UHFFFAOYSA-N 0.000 description 1
- 229940011051 isopropyl acetate Drugs 0.000 description 1
- GWYFCOCPABKNJV-UHFFFAOYSA-N isovaleric acid Chemical compound CC(C)CC(O)=O GWYFCOCPABKNJV-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 229960004624 perflexane Drugs 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- UBOXGVDOUJQMTN-UHFFFAOYSA-N trichloroethylene Natural products ClCC(Cl)Cl UBOXGVDOUJQMTN-UHFFFAOYSA-N 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
Landscapes
- Extraction Or Liquid Replacement (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本願発明は、不燃性溶剤の蒸気を
用いた物品表面からの可燃性溶剤の除去方法に関する。
更に詳しくは金属、金属メッキ品、硝子、セラミックス
、プラスチックス等の物品表面に残留する可燃性溶剤を
不燃性溶剤蒸気によって取除くことができる物品からの
可燃性溶剤の除去方法に関する。従って、この除去方法
は精密機械工業、光学機械工業、電気電子工業、プラス
チックス工業等において、可燃性溶剤で精密に洗浄され
た部品や製品等の物品から速やかに可燃性溶剤を除去し
乾燥する必要のある分野において利用される。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for removing a flammable solvent from the surface of an article using vapor of a non-flammable solvent. More specifically, the present invention relates to a method for removing flammable solvents from articles such as metals, metal plated articles, glass, ceramics, plastics, etc., in which flammable solvents remaining on the surfaces of articles can be removed using nonflammable solvent vapor. Therefore, this removal method is used in the precision machinery industry, optical machinery industry, electrical and electronic industry, plastics industry, etc. to quickly remove and dry flammable solvents from articles such as parts and products that have been precisely cleaned with flammable solvents. It is used in fields where it is needed.
【０００２】0002
【従来の技術】従来、金属、金属メッキ品、硝子、セラ
ミックス、プラスチックス等の物品に付着している無機
または有機質の汚れ成分や水分等をイソプロピルアルコ
ールや工業ガソリン等の引火点を有する可燃性溶剤で除
去した後、物品表面に残留する可燃性溶剤の除去方法に
次の方法がある。[Prior Art] Conventionally, inorganic or organic dirt components and moisture adhering to metals, metal plated products, glass, ceramics, plastics, etc. have been removed using combustible substances with flash points such as isopropyl alcohol and industrial gasoline. The following methods are available to remove the flammable solvent remaining on the surface of the article after removal with a solvent.
【０００３】先ず、引火点を有しない１，１，２−トリ
フルオロ−１，２，２−トリクロロエタン（以下、ＣＦ
Ｃ−１１３と称す）、１，１，１−トリクロロエタン、
トリクロロエチレン等の不燃性溶剤蒸気による蒸気乾燥
がある。具体的には、これらの不燃性溶剤を蒸気槽に投
入後沸点まで加熱して不燃性溶剤蒸気を連続的に発生さ
せ、その不燃性溶剤蒸気中に可燃性溶剤が残留する物品
を曝して可燃性溶剤を除去し物品を乾燥する方法である
。First, 1,1,2-trifluoro-1,2,2-trichloroethane (hereinafter referred to as CF
C-113), 1,1,1-trichloroethane,
There is steam drying using nonflammable solvent vapor such as trichlorethylene. Specifically, these nonflammable solvents are put into a steam tank and then heated to the boiling point to continuously generate nonflammable solvent vapor, and articles with residual flammable solvents are exposed to the nonflammable solvent vapor to prevent combustibility. This method removes the solvent and dries the product.
【０００４】次に、不燃性溶剤を使用しない除去乾燥法
である。具体的には物品に熱風を当て表面に残留する可
燃性溶剤を蒸発させる蒸発乾燥法と、物品表面に残留す
る可燃性溶剤の沸点よりも低沸点の可燃性溶剤を使用し
て低沸点可燃性溶剤蒸気による蒸気乾燥法がある。Next is a removal drying method that does not use a nonflammable solvent. Specifically, the evaporative drying method involves blowing hot air onto the product to evaporate the flammable solvent remaining on the surface, and the low-boiling-point flammable method uses a flammable solvent with a boiling point lower than that of the flammable solvent remaining on the surface of the product. There is a steam drying method using solvent vapor.
【０００５】[0005]
【発明が解決しようとする課題】従来から使用されてい
るＣＦＣ−１１３、１，１，１−トリクロロエタン、ト
リクロロエチレン等の不燃性溶剤は可燃性溶剤と任意に
溶解するため、発生した蒸気を冷却した凝縮液や物品に
凝縮して物品から落ちた落下液は均一相になって回収さ
れる。この回収液は蒸留等を行い不燃性溶剤を多量含有
する留分を取出し蒸気槽に戻している。しかし、蒸留等
では完全なる分離が困難であるため蒸気槽に可燃性溶剤
が蓄積していき、ついには火災等を誘発する可燃性混合
蒸気を形成するといった問題がある。[Problems to be Solved by the Invention] Conventionally used non-flammable solvents such as CFC-113, 1,1,1-trichloroethane, and trichloroethylene dissolve arbitrarily in flammable solvents, so the generated vapor must be cooled. The condensate or the liquid that condenses on the article and falls off the article is collected as a homogeneous phase. This recovered liquid is subjected to distillation, etc., and a fraction containing a large amount of nonflammable solvent is extracted and returned to the steam tank. However, since it is difficult to completely separate the solvent by distillation or the like, there is a problem in that the flammable solvent accumulates in the steam tank, eventually forming a flammable mixed vapor that can cause a fire or the like.
【０００６】熱風によって物品表面に残留した可燃性溶
剤を除去し乾燥する場合は、常に火災や爆発の危険性が
ある。一般的に低沸点溶剤ほど引火点が低く且つ爆発範
囲が広いため、低沸点溶剤が残留する物品の乾燥工程で
は完全防爆型装置や厳密な作業環境維持等の対策が必要
となる。また、高沸点溶剤を使用し火災や爆発の危険性
を低減する方法も採用されているが、危険性を完全に回
避できないことや物品表面の可燃性溶剤を除去するに多
大な時間や熱エネルギーを必要とする等の問題がある。[0006] When hot air is used to remove and dry flammable solvents remaining on the surface of an article, there is always a risk of fire or explosion. In general, the lower the boiling point solvent, the lower the flash point and the wider the explosive range, so measures such as completely explosion-proof equipment and maintaining a strict working environment are required in the process of drying products in which low-boiling point solvents remain. In addition, methods have been adopted to reduce the risk of fire and explosion by using high boiling point solvents, but the danger cannot be completely avoided and it takes a great deal of time and heat energy to remove the flammable solvent from the surface of the product. There are problems such as the need for
【０００７】低沸点可燃性溶剤蒸気によって物品表面の
高沸点可燃性溶剤を除去乾燥する場合は、従来の不燃性
溶剤蒸気による蒸気乾燥と同様に分離が困難であること
や、常に火災や爆発の危険性を伴う等の問題がある。よ
って本願発明は、物品表面に残留する可燃性溶剤を容易
に且つ効率良く除去し、しかも回収した液から可燃性溶
剤と不燃性溶剤とを容易に分離して不燃性溶剤をすぐに
再使用することを目的とする。When removing and drying high-boiling flammable solvents from the surface of articles using low-boiling flammable solvent vapor, separation is difficult and there is always the risk of fire or explosion, similar to conventional vapor drying using non-flammable solvent vapor. There are problems such as danger. Therefore, the present invention easily and efficiently removes the flammable solvent remaining on the surface of an article, easily separates the flammable solvent and the non-flammable solvent from the recovered liquid, and immediately reuses the non-flammable solvent. The purpose is to
【０００８】[0008]
【課題を解決するための手段】本願発明者等は、上記目
的を達成するために種々検討を重ねた結果、本願の目的
を達し得る可燃性溶剤の除去方法を見出し本願発明に到
達した。すなわち、本願発明は、アルコール類、炭化水
素類、ケトン類、エステル類から選ばれる可燃性溶剤の
一種以上で湿潤した物品を、当該可燃性溶剤と実質的に
相溶しない不燃性溶剤の蒸気中に曝すことを特徴とする
物品表面からの可燃性溶剤の除去方法である。[Means for Solving the Problems] As a result of various studies to achieve the above object, the inventors of the present invention have found a method for removing flammable solvents that can achieve the object of the present invention, and have arrived at the present invention. That is, the present invention allows an article moistened with one or more flammable solvents selected from alcohols, hydrocarbons, ketones, and esters to be soaked in vapor of a nonflammable solvent that is substantially incompatible with the flammable solvent. A method for removing a flammable solvent from the surface of an article, the method comprising: exposing the surface of an article to flammable solvents;
【０００９】本願発明におけるアルコール類、炭化水素
類、ケトン類、エステル類の可燃性溶剤には、沸点が５
０〜３００℃の範囲にあるエタノール、イソプロピルア
ルコール、ｎ−プロピルアルコール、ｎ−ブチルアルコ
ール、ｎ−ヘキサン、ｎ−ヘプタン、工業ガソリン５号
、メチルエチルケトン、メチルイソブチルケトン、酢酸
エチル、酢酸イソプロピル、酢酸ｎ−ブチル等多数の溶
剤が挙げられる。[0009] The flammable solvent of alcohols, hydrocarbons, ketones, and esters in the present invention has a boiling point of 5
Ethanol, isopropyl alcohol, n-propyl alcohol, n-butyl alcohol, n-hexane, n-heptane, industrial gasoline No. 5, methyl ethyl ketone, methyl isobutyl ketone, ethyl acetate, isopropyl acetate, acetic acid n in the range of 0 to 300°C A number of solvents are mentioned, such as -butyl.
【００１０】本願発明に用いる可燃性溶剤と実質的に相
溶しない不燃性溶剤とは、可燃性溶剤の溶解度が５重量
％未満を与える不燃性溶剤である。また、その不燃性溶
剤は下記化２で示される完全フッ素化化合物であり、具
体例としてパーフルオロヘキサン、パーフルオロジブチ
ルエーテル等があり、商品名としてはフロリナート（住
友３Ｍ）、アフルード（旭硝子）、エフリード（関東電
化工業）、エフトップ（三菱金属）、ガルデン（日本モ
ンテジソン）等が挙げられる。The nonflammable solvent that is substantially incompatible with the flammable solvent used in the present invention is a nonflammable solvent that provides a solubility of the flammable solvent of less than 5% by weight. In addition, the nonflammable solvent is a fully fluorinated compound shown in the following chemical formula 2, and specific examples include perfluorohexane, perfluorodibutyl ether, etc., and product names include Fluorinert (Sumitomo 3M), Affluid (Asahi Glass), Examples include Efreed (Kanto Denka Kogyo), Ftop (Mitsubishi Metals), and Galden (Nippon Montageson).
【００１１】[0011]
【化２】[Case 2]
【００１２】本願発明の方法によれば、可燃性溶剤と実
質的に相溶しない不燃性溶剤を沸点まで加熱し不燃性溶
剤蒸気を連続的に発生させ、その不燃性溶剤蒸気中に可
燃性溶剤を湿潤する物品を曝すことにより物品表面に残
留する可燃性溶剤を容易に除去し物品を乾燥することが
できる。その作用は、物品に残留する可燃性溶剤が不燃
性溶剤蒸気から蒸発熱を奪い可燃性溶剤自身が蒸発して
物品表面から除去される作用（以下、この作用を蒸発作
用と称す。）および／または蒸発熱を奪われた不燃性溶
剤蒸気が物品表面に凝縮し物品表面に残留する可燃性溶
剤を置換する作用（以下、この作用を置換作用と称す。
）による。According to the method of the present invention, a nonflammable solvent that is substantially incompatible with a flammable solvent is heated to its boiling point to continuously generate nonflammable solvent vapor, and the flammable solvent is contained in the nonflammable solvent vapor. By exposing the article to moisture, the flammable solvent remaining on the surface of the article can be easily removed and the article can be dried. The action is that the flammable solvent remaining on the article absorbs the heat of evaporation from the non-flammable solvent vapor, and the flammable solvent itself evaporates and is removed from the surface of the article (hereinafter, this action is referred to as evaporation action). Alternatively, nonflammable solvent vapor from which heat of vaporization has been removed condenses on the surface of the article and replaces the flammable solvent remaining on the surface of the article (hereinafter, this action is referred to as displacement action).
【００１３】可燃性溶剤の沸点が低く且つ不燃性溶剤の
沸点が高くなる組合せほど蒸発作用による除去が大きく
なり、その沸点差が２０℃以上のとき蒸発作用による除
去が主体となる。本願発明における可燃性溶剤と不燃性
溶剤は、実質的に相溶せずしかも可燃性溶剤の比重に比
べ不燃性溶剤の比重が大きい。従って、置換作用による
除去で物品表面から蒸気槽内に落下した可燃性溶剤と凝
縮して落下した不燃性溶剤は、蒸気槽外に設けた比重差
分離器等に送入して可燃性溶剤と不燃性溶剤とを容易に
分離できる。また、物品から蒸発した可燃性溶剤蒸気と
余剰の不燃性溶剤蒸気は、冷却後同様にして分離できる
。分離された不燃性溶剤は、実質的に可燃性溶剤を含有
しないためすぐに蒸気槽に戻して再使用することができ
る。これらの操作を繰り返しても蒸気相における可燃性
成分は、主に物品表面から蒸発したものであり火災や爆
発を誘発するような蒸気組成には至りにくい。[0013] The lower the boiling point of the flammable solvent and the higher the boiling point of the non-flammable solvent, the greater the removal by evaporation, and when the difference in boiling point is 20°C or more, the removal by evaporation becomes main. The flammable solvent and the non-flammable solvent in the present invention are not substantially compatible with each other, and the specific gravity of the non-flammable solvent is greater than the specific gravity of the flammable solvent. Therefore, the flammable solvent that has fallen from the surface of the product into the steam tank due to removal by displacement and the non-flammable solvent that has condensed and fallen are sent to a specific gravity difference separator installed outside the steam tank and separated into combustible solvents. Can be easily separated from nonflammable solvents. Further, the flammable solvent vapor evaporated from the article and the excess nonflammable solvent vapor can be separated in the same manner after cooling. The separated nonflammable solvent contains substantially no flammable solvent and can be immediately returned to the steam tank for reuse. Even if these operations are repeated, the combustible components in the vapor phase mainly evaporate from the surface of the article, and the vapor composition is unlikely to cause a fire or explosion.
【００１４】尚、可燃性溶剤が主に蒸発作用だけで除去
される場合は、可燃性溶剤蒸気と余剰の不燃性溶剤蒸気
を冷却した後の分離操作だけであり作業性や経済性をも
向上する。物品表面から可燃性溶剤を除去した後に物品
を不燃性溶剤蒸気中から引上げて次の工程で使用するた
め、使用する不燃性溶剤は物品表面から速やかに蒸発し
て物品表面から消失することが好ましい。従って、本願
発明を実施するににあたっては沸点が５０〜１５０℃の
範囲にある低沸点の不燃性溶剤が望ましい。[0014] In addition, when the flammable solvent is mainly removed by evaporation alone, the flammable solvent vapor and the excess non-flammable solvent vapor are only separated after cooling, which improves work efficiency and economical efficiency. do. After removing the flammable solvent from the surface of the article, the article is pulled up from the nonflammable solvent vapor and used in the next process, so it is preferable that the nonflammable solvent used quickly evaporates and disappears from the surface of the article. . Therefore, in carrying out the present invention, a low boiling point nonflammable solvent having a boiling point in the range of 50 to 150°C is desirable.
【００１５】[0015]
【実施例】本願発明を実施例によって具体的に説明する
。なお、実施例に示す試験は次の方法によって行った。
−試験法１−
３００ｃｃ丸底フラスコに１００ｃｃの不燃性溶剤を投
入し、不燃性溶剤の沸点まで加熱する。沸点に到達後、
、可燃性溶剤を含んだガラス繊維濾紙（以下、この時の
可燃性溶剤含浸量を湿潤量と称す。）を丸底フラスコの
主管上部から紐で吊し、すぐに栓をして不燃性溶剤蒸気
による可燃性溶剤の除去を５分間実施する。除去中に発
生する可燃性溶剤蒸気は、リービッヒ冷却管を通過させ
２０ｃｃの１，１，１−トリクロロエタン中に回収する
（以下、この操作で回収した可燃性溶剤量を回収量と称
す。）５分経過後、濾紙を取出し２０ｃｃの１，１，１
−トリクロロエタン中に浸漬し濾紙に残っている可燃性
溶剤を抽出する（以下、この操作で抽出した可燃性溶剤
量を抽出量と称す。）これら２種の１，１，１−トリク
ロロエタン中の可燃性溶剤濃度をガスクロマトグラフィ
ーで測定し各々の可燃性溶剤量を求め、下記数１により
可燃性溶剤の除去率を算出した。その結果を表１に示す
。[Example] The present invention will be specifically explained by referring to an example. Note that the tests shown in Examples were conducted by the following method. -Test method 1- 100 cc of nonflammable solvent is put into a 300 cc round bottom flask and heated to the boiling point of the nonflammable solvent. After reaching the boiling point,
A glass fiber filter paper containing a flammable solvent (hereinafter, the amount of flammable solvent impregnated at this time is referred to as the wet amount) is hung from the top of the main pipe of the round-bottomed flask with a string, and the stopper is immediately capped to remove the non-flammable solvent. Steam removal of flammable solvents is carried out for 5 minutes. The flammable solvent vapor generated during the removal is passed through a Liebig cooling pipe and recovered in 20 cc of 1,1,1-trichloroethane (hereinafter, the amount of flammable solvent recovered in this operation is referred to as the recovered amount)5. After minutes, remove the filter paper and use 20cc of 1, 1, 1.
- Extract the flammable solvent remaining on the filter paper by immersing it in trichloroethane (hereinafter, the amount of flammable solvent extracted by this operation is referred to as the extracted amount). The concentration of the flammable solvent was measured by gas chromatography to determine the amount of each flammable solvent, and the removal rate of the flammable solvent was calculated using Equation 1 below. The results are shown in Table 1.
【００１６】[0016]
【数１】[Math 1]
【００１７】−試験法２−
３０ｃｃ試験管に不燃性溶剤１０ｃｃと可燃性溶剤１０
ｃｃを投入し、激しく振とう後２分間静置して、下層に
ある不燃性溶剤中の可燃性溶剤濃度をガスクロマトグラ
フィーで測定した。その結果を表２に示す。実施例中の
不燃性溶剤は、住友３Ｍ製のフロリナートを使用し、そ
の商品名で記載する。ＦＣ−７２の沸点は５６℃、ＦＣ
−７５の沸点は１０２℃、ＦＣ−４０の沸点は１５５℃
である。- Test method 2 - 10 cc of non-flammable solvent and 10 ml of flammable solvent in a 30 cc test tube
cc was added, and after shaking vigorously, it was allowed to stand for 2 minutes, and the concentration of the flammable solvent in the nonflammable solvent in the lower layer was measured by gas chromatography. The results are shown in Table 2. Fluorinert manufactured by Sumitomo 3M is used as the nonflammable solvent in the examples, and is described by its trade name. The boiling point of FC-72 is 56℃, FC
-75 has a boiling point of 102℃, FC-40 has a boiling point of 155℃
It is.
【００１８】表１から明らかなように、本願発明の方法
は物品表面から容易に可燃性溶剤を除去することができ
る。更に、表２から実質的に相溶しないため分離性に優
れるものである。As is clear from Table 1, the method of the present invention can easily remove flammable solvents from the surface of articles. Furthermore, as shown in Table 2, they are substantially incompatible and have excellent separability.
【００１９】[0019]
【表１】[Table 1]
【００２０】[0020]
【表２】[Table 2]
【００２１】[0021]
【発明の効果】本願発明の方法は、物品表面に残留する
可燃性溶剤を容易に除去し、しかも回収した液から可燃
性溶剤と不燃性溶剤を容易に分離して、不燃性溶剤をす
ぐに再使用することができる。また、火災や爆発の危険
性を防止できる効果も有する。[Effects of the Invention] The method of the present invention easily removes the flammable solvent remaining on the surface of the article, easily separates the flammable solvent from the non-flammable solvent from the recovered liquid, and immediately removes the non-flammable solvent. Can be reused. It also has the effect of preventing the risk of fire and explosion.
Claims (2)
、エステル類から選ばれる可燃性溶剤の一種以上で湿潤
した物品を、当該可燃性溶剤と実質的に相溶しない不燃
性溶剤の蒸気中に曝すことを特徴とする物品表面からの
可燃性溶剤の除去方法。Claim 1: An article moistened with one or more flammable solvents selected from alcohols, hydrocarbons, ketones, and esters is immersed in a vapor of a nonflammable solvent that is substantially incompatible with the flammable solvent. A method for removing a flammable solvent from the surface of an article, the method comprising exposing the surface of an article to a flammable solvent.
が５０〜１５０℃の範囲にある完全フッ素化化合物であ
ることを特徴とする特許請求の範囲請求項１記載の除去
方法。 【化１】2. The removal method according to claim 1, wherein the nonflammable solvent is a fully fluorinated compound represented by the following formula 1 and having a boiling point in the range of 50 to 150°C. [Chemical formula 1]
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1415491A JPH04256402A (en) | 1991-02-05 | 1991-02-05 | Method for removing combustible solvent from article surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1415491A JPH04256402A (en) | 1991-02-05 | 1991-02-05 | Method for removing combustible solvent from article surface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04256402A true JPH04256402A (en) | 1992-09-11 |
Family
ID=11853235
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1415491A Withdrawn JPH04256402A (en) | 1991-02-05 | 1991-02-05 | Method for removing combustible solvent from article surface |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04256402A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014004500A (en) * | 2012-06-21 | 2014-01-16 | Kazuya Masuda | Decontamination method of fluorescent lamp stabilizer |
-
1991
- 1991-02-05 JP JP1415491A patent/JPH04256402A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014004500A (en) * | 2012-06-21 | 2014-01-16 | Kazuya Masuda | Decontamination method of fluorescent lamp stabilizer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5789359A (en) | Detergent, method of cleaning, and apparatus for cleaning | |
| US5346645A (en) | Desiccant composition and a method of desiccating articles | |
| US3728268A (en) | Mixtures of 1,1,2-trichloro-1,2,2-trifluoroethane,ethanol and acetone and a ternary azeotrope thereof | |
| EP0643780B2 (en) | Multiple solvent cleaning system | |
| US5445757A (en) | Compositions comprising pentafluorobutane and use of these compositions | |
| US5599783A (en) | Cleaning solvent composition and a method for cleaning or drying articles | |
| TWI279261B (en) | Compositions and methods for cleaning contaminated articles | |
| JPH06166894A (en) | Composition for cleaning and/or drying of solid surface based on 1,1,1,3,3-pentafluorobutane and dichloromethane | |
| JPH04256402A (en) | Method for removing combustible solvent from article surface | |
| JPH03504871A (en) | Azeotrope-like composition of 1,1-dichloro-1-fluoroethane and methanol | |
| BE1005163A3 (en) | Composition containing fluorinated ether and use thereof. | |
| WO1994028196A1 (en) | Multiple solvent cleaning system | |
| US5102563A (en) | Cleaning composition based on 1,1,1,2,2-pentafluoro-3,3-dichloropropane and methyl tert-butyl ether | |
| JPH0321688A (en) | Fluorine-containing alcoholic dehydrating agent and method for dehydrating and drying article | |
| US3477952A (en) | Azeotropic composition | |
| US5395548A (en) | Non-azeotropic solvent composition for cleaning and defluxing electrical assemblies | |
| JPH05184807A (en) | Method for removing combustible solvent from article surface | |
| JP3266936B2 (en) | Composition for removing water and method for removing water from articles | |
| RU2113921C1 (en) | Cleaning liquid composition, variant thereof, and method of removing contaminations from substrate using cleaning composition | |
| JPH04350186A (en) | Method for removing flammable solvent from surface of article | |
| US5482563A (en) | Method for electrical assembly cleaning using a non-azeotropic solvent composition | |
| EP0098384A2 (en) | Cleaning method and solvent for removing residue compositions containing both polar and non-polar materials | |
| JP7126830B2 (en) | Method for regenerating fluorinated liquids and regenerating apparatus using same | |
| US5152913A (en) | Cleaning composition based on 1,1-dichloro-1-fluoroethane, methyl formate and methanol | |
| EP1068289A1 (en) | Organic-based composition |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Application deemed to be withdrawn because no request for examination was validly filed |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19980514 |