JPH05137980A - Membrane for separating vapor of organic solvent - Google Patents
Membrane for separating vapor of organic solventInfo
- Publication number
- JPH05137980A JPH05137980A JP30174691A JP30174691A JPH05137980A JP H05137980 A JPH05137980 A JP H05137980A JP 30174691 A JP30174691 A JP 30174691A JP 30174691 A JP30174691 A JP 30174691A JP H05137980 A JPH05137980 A JP H05137980A
- Authority
- JP
- Japan
- Prior art keywords
- membrane
- organic solvent
- polymethylpentene
- porous support
- solvent vapor
- 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
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、気体中の有機溶剤蒸気
を選択的に分離する分離膜に関する。さらに詳しくは、
有機溶剤蒸気に対して耐性があり、かつ分離特性の優れ
た有機溶剤蒸気分離膜に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a separation membrane for selectively separating an organic solvent vapor in a gas. For more details,
The present invention relates to an organic solvent vapor separation membrane that is resistant to organic solvent vapor and has excellent separation characteristics.
【０００２】[0002]
【従来の技術】近年、有機溶剤を使用している場所で
は、労働衛生上などの要請から有機蒸気の発生を極力抑
制したり、地球規模の環境を汚染させないため、大気中
に有機蒸気を排出することを極力少なくすることが求め
られている。2. Description of the Related Art In recent years, where organic solvents are used, organic vapors are discharged into the atmosphere in order to suppress the generation of organic vapors to the utmost and to prevent pollution of the global environment due to requirements such as occupational health. It is required to do as little as possible.
【０００３】従来、ポリメチルペンテンを使用した分離
膜は、酸素富化膜として良く知られている（特開昭５０
−３８６８３号公報、同５４−１４６２７７号公報、同
５５−４１０８号公報、同５５−４１８０９号公報、同
５６−８９８０３号公報、同５６−９２９２５号公報、
同６１−１２５４２４号公報など）。これらの公知例は
いずれも、ポリメチルペンテンが酸素を選択的に富化ま
たは濃縮することに着目した発明である。Conventionally, a separation membrane using polymethylpentene is well known as an oxygen-enriched membrane (Japanese Patent Laid-open No. Sho 50).
No. 38683, No. 54-146277, No. 55-4108, No. 55-41809, No. 56-89803, No. 56-92925.
61-125424, etc.). All of these known examples are inventions focusing on the fact that polymethylpentene selectively enriches or concentrates oxygen.
【０００４】また、別の公知例としては、有機溶剤蒸気
分離膜としてはシリコーン樹脂と多孔質支持体とを複合
化させた複合膜が知られている（特開平１−２３６９１
８号公報）。また、この膜を用いた有機溶剤の回収装置
が実際に市販されている。As another known example, a composite membrane in which a silicone resin and a porous support are complexed is known as an organic solvent vapor separation membrane (Japanese Patent Laid-Open No. 1-23691).
No. 8). An organic solvent recovery device using this membrane is actually commercially available.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、従来技
術のたとえば特開平１−２３６９１８号公報の発明は、
分離膜に用いられているシリコーン樹脂は、空気と有機
溶剤蒸気の分離性能が低く、この膜を用いた有機溶剤の
回収は他の方法、例えば、冷却法、吸着法、吸収法など
と比較して技術的にも経済的にも有利であるとはいえな
い。However, the prior art, for example, the invention of Japanese Patent Laid-Open No. 1-236918,
The silicone resin used for the separation membrane has a low separation performance between air and organic solvent vapor, and the recovery of the organic solvent using this membrane is compared with other methods, for example, cooling method, adsorption method, absorption method, etc. Therefore, it is not technically or economically advantageous.
【０００６】本発明は、前記従来技術の課題を解決する
ため、特定のポリマーを活性薄膜とし多孔質支持体に担
持せしめることによって、空気と有機溶剤蒸気の分離性
能が優れた分離膜を提供することを目的とする。In order to solve the above-mentioned problems of the prior art, the present invention provides a separation membrane having an excellent performance of separating air and organic solvent vapor by supporting a specific polymer as an active thin film on a porous support. The purpose is to
【０００７】[0007]
【課題を解決するための手段】前記目的を達成するた
め、本発明の有機溶剤蒸気分離膜は、気体中の有機溶剤
蒸気を選択的に分離する分離膜であって、前記分離膜
は、有機溶剤に安定な多孔質支持体上にポリメチルペン
テン緻密層が形成されていることを特徴とする。In order to achieve the above object, the organic solvent vapor separation membrane of the present invention is a separation membrane for selectively separating organic solvent vapor in a gas, wherein the separation membrane is organic. A dense layer of polymethylpentene is formed on a solvent-stable porous support.
【０００８】前記構成においては、ポリメチルペンテン
緻密層の厚みが０．０５〜５μｍであることが好まし
い。また前記構成においては、多孔質支持体の窒素ガス
透過速度が１〜１０００Ｎｍ3 ／（ｍ2 ・ｈ・ａｔｍ）
であることが好ましい。In the above structure, the dense layer of polymethylpentene preferably has a thickness of 0.05 to 5 μm. Further, in the above structure, the nitrogen gas permeation rate of the porous support is 1 to 1000 Nm 3 / (m 2 · h · atm).
Is preferred.
【０００９】[0009]
【作用】前記した本発明の構成によれば、有機溶剤に化
学的に安定な多孔質支持体上にポリメチルペンテン緻密
層が形成されているので、有機溶剤蒸気に対して耐性が
あり、かつ空気と有機溶剤蒸気（有機ガス）との分離特
性の優れた分離膜とすることができる。According to the above-mentioned constitution of the present invention, since the polymethylpentene dense layer is formed on the porous support which is chemically stable in the organic solvent, it is resistant to the organic solvent vapor, and It is possible to obtain a separation membrane having excellent separation characteristics between air and organic solvent vapor (organic gas).
【００１０】また、ポリメチルペンテン緻密層の厚みが
０．０５〜５μｍであるという本発明の好ましい構成に
よれば、空気と有機溶剤蒸気との分離機能を有効に発揮
できる。また、多孔質支持体の窒素ガス透過速度が１〜
１０００Ｎｍ3 ／（ｍ2 ・ｈ・ａｔｍ）であるという本
発明の好ましい構成によれば、同様に空気と有機溶剤蒸
気との分離機能を有効に発揮できる。このような観点及
び有機溶剤蒸気に対する耐性の観点から、最も好ましい
多孔質支持体の材料は、ポリイミド膜である。Further, according to the preferable constitution of the present invention in which the dense layer of polymethylpentene has a thickness of 0.05 to 5 μm, the function of separating air from organic solvent vapor can be effectively exhibited. Further, the nitrogen gas permeation rate of the porous support is 1 to
According to the preferable constitution of the present invention of 1000 Nm 3 / (m 2 · h · atm), the function of separating air from organic solvent vapor can be effectively exhibited. From such a viewpoint and from the viewpoint of resistance to organic solvent vapor, the most preferable material for the porous support is a polyimide film.
【００１１】[0011]
【実施例】以下実施例を用いて本発明をさらに具体的に
説明する。本発明において、有機溶剤蒸気とは、一般に
は炭化水素類、アルコール類、ケトン類、ハロゲン化炭
化水素類（フロンガスを含む）、カルボン酸類、カルボ
ン酸エステル類等の有機溶剤の蒸気をいい、具体的に
は、例えば、メタン、エタン、プロパン、ブタン、ペン
タン、ヘキサン、ヘプタン、オクタン、イソブタン、イ
ソペンタン、イソオクタン等に代表される飽和脂肪族炭
化水素類、エチレン、プロピレン、ブテン、イソブテ
ン、ペンテン等に代表される不飽和脂肪族炭化水素類、
アセトン、メチルエチルケトン等に代表されるケトン
類、ベンゼン、トルエン、キシレン等に代表される芳香
炭化水素類、メタノール、エタノール、プロピルアルコ
ール、イソプロピルアルコール等に代表されるアルコー
ル類、四塩化炭素、クロロホルム、塩化メチレン、トリ
クロロエチレン、トリクロロエタン、フロン１１３等に
代表されるハロゲン化炭化水素、酢酸に代表されるカル
ボン酸類、酢酸メチル、酢酸エチル、酢酸ブチル、アク
リル酸ブチル等に代表されるカルボン酸エステル類の蒸
気等をいう。The present invention will be described in more detail with reference to the following examples. In the present invention, the organic solvent vapor generally means vapors of organic solvents such as hydrocarbons, alcohols, ketones, halogenated hydrocarbons (including Freon gas), carboxylic acids, carboxylic acid esters, etc. Specifically, for example, saturated aliphatic hydrocarbons represented by methane, ethane, propane, butane, pentane, hexane, heptane, octane, isobutane, isopentane, isooctane, ethylene, propylene, butene, isobutene, pentene, etc. Representative unsaturated aliphatic hydrocarbons,
Acetone, ketones typified by methyl ethyl ketone, aromatic hydrocarbons typified by benzene, toluene, xylene, alcohols typified by methanol, ethanol, propyl alcohol, isopropyl alcohol, carbon tetrachloride, chloroform, chlorinated Halogenated hydrocarbons typified by methylene, trichloroethylene, trichloroethane, freon 113, carboxylic acids typified by acetic acid, vapors of carboxylic acid esters typified by methyl acetate, ethyl acetate, butyl acetate, butyl acrylate, etc. Say.
【００１２】本発明においては、有機溶剤蒸気は有機化
合物のガスを含有していてもよい。上記多孔質支持体と
しては、窒素ガス透過速度１〜１０００Ｎｍ3 ／（ｍ2
・ｈ・ａｔｍ）であれば、任意のものを用いることがで
きるが、特に、多くの有機溶剤蒸気や有機化合物のガス
に膨潤しない性質（耐性）にすぐれるポリイミド、ポリ
スルホン、ポリフッ化ビニリデン、ポリアクリロニトリ
ル、ポリアミド、ポリエーテルアミド等からなる多孔質
膜が好ましい。とくにポリイミドは好ましい素材であ
る。In the present invention, the organic solvent vapor may contain a gas of an organic compound. The above-mentioned porous support has a nitrogen gas permeation rate of 1 to 1000 Nm 3 / (m 2
If h.atm), any one can be used, but in particular, polyimide, polysulfone, polyvinylidene fluoride, poly (vinylidene fluoride), which has excellent properties (resistance) not to swell in many organic solvent vapors and gases of organic compounds. A porous membrane made of acrylonitrile, polyamide, polyetheramide or the like is preferable. Polyimide is a particularly preferable material.
【００１３】これら多孔質膜は、通常、膜形成素材とし
ての樹脂を含む有機溶液を適宜の基材上に塗布し、これ
を樹脂を溶解しない溶剤中に浸漬して、樹脂を凝固させ
ると共に、脱溶剤する相転換法または湿式製膜法によっ
て、限外瀘過膜や精密瀘過膜等の分離水準を有する所謂
湿潤膜として得ることができる。このようにして得られ
る多孔質膜は、表面層としての緻密層と、この緻密層を
一体に支持する多孔素質層とからなる異方性構造を有
し、本発明においては、多孔質支持膜としては、このよ
うな異方性膜が複合膜の製造上の有利性から好ましく用
いられる。In these porous membranes, an organic solution containing a resin as a film-forming material is usually coated on an appropriate base material and immersed in a solvent that does not dissolve the resin to coagulate the resin. A so-called wet membrane having a separation level such as an ultrafiltration membrane or a precision filtration membrane can be obtained by a phase conversion method of removing a solvent or a wet membrane formation method. The porous membrane thus obtained has an anisotropic structure composed of a dense layer as a surface layer and a porous layer integrally supporting the dense layer. In the present invention, the porous support membrane is used. As such, such an anisotropic film is preferably used because of its advantage in manufacturing a composite film.
【００１４】次いで、この多孔質膜の表面にポリメチル
ペンテンの溶液を塗布し、溶剤を揮散させれば、多孔質
支持膜の表面に活性薄膜としてのポリメチルペンテン薄
膜を形成することができる。Then, a solution of polymethylpentene is applied to the surface of the porous membrane, and the solvent is volatilized to form a polymethylpentene thin film as an active thin film on the surface of the porous support membrane.
【００１５】本発明において用いるポリメチルペンテン
とは、下記式（化１）に示される構造のポリ（４−メチ
ル−１−ペンテン）などが好ましい。The polymethylpentene used in the present invention is preferably poly (4-methyl-1-pentene) having a structure represented by the following formula (Formula 1).
【００１６】[0016]
【化１】 [Chemical 1]
【００１７】多孔質支持膜上に形成されるポリメチルペ
ンテンからなる活性薄膜（緻密層）の膜厚は、０．０５
〜５μｍであることが好ましい。膜厚が０．０５μｍよ
りも小さい場合には、膜に欠陥が生じやすく、一方、５
μｍよりも大きい場合には、透過速度が小さくなり、実
用に適さなくなるからである。The thickness of the active thin film (dense layer) made of polymethylpentene formed on the porous support film is 0.05.
It is preferably ˜5 μm. If the film thickness is less than 0.05 μm, defects tend to occur in the film, while 5
This is because if it is larger than μm, the transmission speed becomes small and it becomes unsuitable for practical use.
【００１８】このようにして得られる複合膜は、強度を
付与するために、ポリエステル、ポリエチレン、ポリプ
ロピレン等からなる織布または不織布などで裏打ちされ
ていてもよい。The composite membrane thus obtained may be lined with a woven or non-woven fabric made of polyester, polyethylene, polypropylene or the like in order to impart strength.
【００１９】以下に具体的実施例を挙げて本発明を説明
する。これらの実施例は単に例を挙げたもので、本発明
の範囲を限定し、また、その原理の基礎とするものでは
ない。なお実施例において、ガス分離性能の測定は、柳
本製作所社製のガス透過速度測定装置を用いて、２５℃
で行った。窒素ガスおよびヘキサン蒸気の透過速度を計
算し、両者の比から分離係数を求めた。The present invention will be described below with reference to specific examples. These examples are merely illustrative and do not limit the scope of the invention or form the basis of its principles. In the examples, the gas separation performance was measured at 25 ° C. using a gas permeation rate measuring device manufactured by Yanagimoto Seisakusho.
I went there. The permeation rates of nitrogen gas and hexane vapor were calculated, and the separation coefficient was obtained from the ratio of both.
【００２０】実施例１ 多孔質支持膜材料として、ポリマの繰り返し単位が下記
式（化２）で示されるポリイミドを用いた。Example 1 As a porous support membrane material, a polyimide having a polymer repeating unit represented by the following formula (Formula 2) was used.
【００２１】[0021]
【化２】 [Chemical 2]
【００２２】前記式（化２）で示されるポリイミドを１
６重量％の割合で次の混合溶媒（極性溶媒を含む）に加
えて均一溶液とし塗布液を調整した。混合溶媒として
は、ジエチレングリコールジメチルエーテル１６重量％
及びジメチルホルムアミド２７重量％を含むＮ−メチル
−２−ピロリドン溶液とした。この調整塗布液を厚さ１
５０μｍでポリエステル不織布に塗布し、これを水に浸
漬することにより、窒素ガス透過速度が３５０Ｎｍ3 ／
（ｍ2 ・ｈ・ａｔｍ）の異方性構造を有する多孔質膜を
作成した。The polyimide represented by the above formula (Formula 2) is 1
A coating solution was prepared by adding 6 wt% to the following mixed solvent (including a polar solvent) to form a uniform solution. 16% by weight of diethylene glycol dimethyl ether as a mixed solvent
And N-methyl-2-pyrrolidone solution containing 27% by weight of dimethylformamide. Apply this adjusted coating solution to a thickness of 1
By coating the polyester non-woven fabric with 50 μm and immersing it in water, the nitrogen gas permeation rate is 350 Nm 3 /
A porous film having an anisotropic structure of (m 2 · h · atm) was prepared.
【００２３】次に１．５重量％ポリメチルペンテン（三
井石油化学工業株式会社製ＴＰＸ）のシクロヘキサン溶
液に、前記ポリイミド膜の表面を約５秒間浸漬して、ポ
リイミド製多孔質支持膜の上に前記溶液を均一に付着さ
せた後、この塗膜を５０℃の温度に約５分間加熱して、
塗布膜からシクロヘキサンを蒸発揮散させた。そして、
ポリイミド支持膜の上に厚さ約２．５μｍのポリメチル
ペンテンからなる活性薄膜を有する複合膜を形成した。Next, the surface of the polyimide membrane was immersed in a cyclohexane solution of 1.5% by weight polymethylpentene (TPX manufactured by Mitsui Petrochemical Industry Co., Ltd.) for about 5 seconds to form a layer on the porous polyimide support membrane. After applying the solution uniformly, the coating film is heated to a temperature of 50 ° C. for about 5 minutes,
Cyclohexane was evaporated from the coating film. And
A composite film having an active thin film made of polymethylpentene having a thickness of about 2.5 μm was formed on the polyimide supporting film.
【００２４】この膜の分離性能を測定した結果を表１に
示す。 実施例２ 実施例１と同様にして調整したポリイミド膜に、０．３
重量％ポリメチルペンテン（実施例１と同じポリマ）の
シクロヘキサン溶液を用い、実施例１と同様に処理する
ことにより、厚さが約０．２μｍのポリメチルペンテン
からなる活性薄膜を有する複合膜を調製した。The results of measuring the separation performance of this membrane are shown in Table 1. Example 2 A polyimide film prepared in the same manner as in Example 1 was coated with 0.3
A cyclohexane solution of wt% polymethylpentene (the same polymer as in Example 1) was used and treated in the same manner as in Example 1 to obtain a composite film having an active thin film of polymethylpentene having a thickness of about 0.2 μm. Prepared.
【００２５】この膜の分離性能を測定した結果を表１に
示す。 実施例３ ポリイミド（実施例１と同じポリマ）１６重量％を含む
Ｎ−メチル−２−ピロリドン溶液を用い、実施例１と同
様の方法で、窒素ガス透過速度が５Ｎｍ3／（ｍ2 ・ｈ
・ａｔｍ）の多孔質膜を調製した。The results of measuring the separation performance of this membrane are shown in Table 1. Example 3 A N-methyl-2-pyrrolidone solution containing 16% by weight of polyimide (the same polymer as in Example 1) was used, and the nitrogen gas permeation rate was 5 Nm 3 / (m 2 · h) in the same manner as in Example 1.
Atm) porous membrane was prepared.
【００２６】次にこの膜に実施例１と同様の処理をする
ことにより、厚さ約２μｍのポリメチルペンテンからな
る活性薄膜を有する複合膜を調製した。この膜の分離性
能を測定した結果を表１に示す。Next, this membrane was treated in the same manner as in Example 1 to prepare a composite membrane having an active thin film of polymethylpentene having a thickness of about 2 μm. The results of measuring the separation performance of this membrane are shown in Table 1.
【００２７】実施例４ 繰り返し単位が、下記式（化３）で示されるポリスルホ
ン１７．５重量％をジメチルホルムアミド溶液に溶解
し、厚さ１５０μｍでポリエステル不織布に塗布し、こ
れを水に浸漬することにより、窒素ガス透過速度が３０
Ｎｍ3 ／（ｍ2 ・ｈ・ａｔｍ）の異方性構造を有する多
孔質膜を調整した。Example 4 A repeating unit was prepared by dissolving 17.5% by weight of polysulfone represented by the following formula (Formula 3) in a dimethylformamide solution, applying it to a polyester nonwoven fabric with a thickness of 150 μm, and immersing it in water. Therefore, the nitrogen gas permeation rate is 30
A porous film having an anisotropic structure of Nm 3 / (m 2 · h · atm) was prepared.
【００２８】[0028]
【化３】 [Chemical 3]
【００２９】次にこの膜に実施例１と同様の処理をする
ことにより、厚さ約２μｍのポリメチルペンテンからな
る活性薄膜を有する複合膜を調製した。この膜の分離性
能を測定した結果を表１に示す。Then, this membrane was treated in the same manner as in Example 1 to prepare a composite membrane having an active thin film of polymethylpentene having a thickness of about 2 μm. The results of measuring the separation performance of this membrane are shown in Table 1.
【００３０】比較例１ 実施例１と同様にして調製したポリイミド膜を５重量％
シリコーン樹脂（ゼネラルエレクトリック社製ＲＴＶ−
６１５）のイソオクタン溶液に約５秒間浸漬して、ポリ
イミド膜上にシリコーン樹脂溶液を均一に付着させた
後、この塗膜を９０℃の温度に約１５分間加熱して、塗
膜からイソオクタンを蒸発揮散させると共に、シリコー
ン樹脂を架橋させてポリイミド支持膜上に厚さ約３μｍ
の架橋シリコーン樹脂からなる活性薄膜を有する複合膜
を調製した。この膜の分離性能を測定した結果を表１に
あわせて示す。Comparative Example 1 5% by weight of a polyimide film prepared in the same manner as in Example 1
Silicone resin (RTV-made by General Electric Company)
615) is soaked in the isooctane solution for about 5 seconds to evenly adhere the silicone resin solution on the polyimide film, and then this coating film is heated to a temperature of 90 ° C. for about 15 minutes to evaporate isooctane from the coating film. Approximately 3 μm thick on the polyimide support film by volatilizing and cross-linking the silicone resin
A composite film having an active thin film made of the cross-linked silicone resin was prepared. The results of measuring the separation performance of this membrane are also shown in Table 1.
【００３１】[0031]
【表１】 [Table 1]
【００３２】表１に示す通り、本実施例による有機溶剤
蒸気分離膜の有機溶剤蒸気と空気の分離性能が優れてい
ることが確認できた。さらに本実施例の多孔質支持体は
有機溶剤蒸気に耐性があり、長期間使用しても溶解、膨
潤などの変形はみられなかった。As shown in Table 1, it was confirmed that the organic solvent vapor separation membrane according to this example has an excellent performance of separating organic solvent vapor from air. Furthermore, the porous support of this example was resistant to organic solvent vapor, and no deformation such as dissolution or swelling was observed even after long-term use.
【００３３】[0033]
【発明の効果】以上説明した通り本発明によれば、有機
溶剤に化学的に安定な多孔質支持体上にポリメチルペン
テン緻密層が形成されているので、有機溶剤蒸気に対し
て耐性があり、かつ空気と有機溶剤蒸気（有機ガス）と
の分離特性の優れた分離膜とすることができる。とくに
空気中における空気と有機ガスとの分離に有効である。As described above, according to the present invention, since a dense layer of polymethylpentene is formed on a porous support which is chemically stable in an organic solvent, it is resistant to organic solvent vapor. In addition, it is possible to obtain a separation membrane having excellent separation characteristics between air and organic solvent vapor (organic gas). It is particularly effective for separating air and organic gas in the air.
【００３４】また、ポリメチルペンテン緻密層の厚みが
０．０５〜５μｍであるという本発明の好ましい構成に
よれば、空気と有機溶剤蒸気との分離機能を有効に発揮
できる。さらに、多孔質支持体の窒素ガス透過速度が１
〜１０００Ｎｍ3 ／（ｍ2 ・ｈ・ａｔｍ）であるという
本発明の好ましい構成によれば、同様に空気と有機溶剤
蒸気との分離機能を有効に発揮できる。Further, according to the preferable constitution of the present invention in which the dense layer of polymethylpentene has a thickness of 0.05 to 5 μm, the function of separating air from organic solvent vapor can be effectively exhibited. Furthermore, the nitrogen gas permeation rate of the porous support is 1
According to the preferable constitution of the present invention that is ˜1000 Nm 3 / (m 2 · h · atm), the function of separating air from organic solvent vapor can be effectively exhibited in the same manner.
Claims (3)
る分離膜であって、前記分離膜は、有機溶剤に安定な多
孔質支持体上にポリメチルペンテン緻密層が形成されて
いることを特徴とする有機溶剤蒸気分離膜。1. A separation membrane for selectively separating organic solvent vapor in a gas, wherein the separation membrane has a dense layer of polymethylpentene formed on a porous support which is stable to the organic solvent. An organic solvent vapor separation membrane characterized by:
０．０５〜５μｍである請求項１に記載の有機溶剤蒸気
分離膜。2. The thickness of the polymethylpentene dense layer is:
The organic solvent vapor separation membrane according to claim 1, which has a thickness of 0.05 to 5 μm.
〜１０００Ｎｍ3／（ｍ2 ・ｈ・ａｔｍ）である請求項
１に記載の有機溶剤蒸気分離膜。3. The nitrogen gas permeation rate of the porous support is 1
The organic solvent vapor separation membrane according to claim 1, which has a viscosity of 1000 Nm 3 / (m 2 · h · atm).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30174691A JPH05137980A (en) | 1991-11-18 | 1991-11-18 | Membrane for separating vapor of organic solvent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30174691A JPH05137980A (en) | 1991-11-18 | 1991-11-18 | Membrane for separating vapor of organic solvent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05137980A true JPH05137980A (en) | 1993-06-01 |
Family
ID=17900669
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30174691A Pending JPH05137980A (en) | 1991-11-18 | 1991-11-18 | Membrane for separating vapor of organic solvent |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05137980A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006130796A (en) * | 2004-11-05 | 2006-05-25 | Daicel Chem Ind Ltd | Laminate having polymethylpentene resin layer and its production method |
| JP2010099863A (en) * | 2008-10-21 | 2010-05-06 | Mitsui Chemicals Inc | Method for manufacturing coating film and method for cleaning member |
| CN106659983A (en) * | 2014-03-13 | 2017-05-10 | 3M创新有限公司 | Asymmetric membranes and related methods |
-
1991
- 1991-11-18 JP JP30174691A patent/JPH05137980A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006130796A (en) * | 2004-11-05 | 2006-05-25 | Daicel Chem Ind Ltd | Laminate having polymethylpentene resin layer and its production method |
| JP2010099863A (en) * | 2008-10-21 | 2010-05-06 | Mitsui Chemicals Inc | Method for manufacturing coating film and method for cleaning member |
| CN106659983A (en) * | 2014-03-13 | 2017-05-10 | 3M创新有限公司 | Asymmetric membranes and related methods |
| EP3116633A4 (en) * | 2014-03-13 | 2017-11-22 | 3M Innovative Properties Company | Asymmetric membranes and related methods |
| US10010835B2 (en) | 2014-03-13 | 2018-07-03 | 3M Innovative Properties Company | Asymmetric membranes and related methods |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5387378A (en) | Integral asymmetric fluoropolymer pervaporation membranes and method of making the same | |
| US5749943A (en) | Method of selectively separating unsaturated hydrocarbon | |
| CN106914153B (en) | A kind of complex reverse osmosis membrane | |
| JPH0647058B2 (en) | Gas selective permeable membrane | |
| JPH04506766A (en) | Composite membrane for separating water from fluid mixtures containing organic components by means of pervaporation | |
| JPH0554374B2 (en) | ||
| Byun et al. | Pervaporation behavior of asymmetric sulfonated polysulfones and sulfonated poly (ether sulfone) membranes | |
| JP5851508B2 (en) | Membrane having non-porous separation layer, and use and manufacturing method of membrane | |
| JPH0451578B2 (en) | ||
| KR20170023144A (en) | Asymmetric articles with a porous substrate and a polymeric coating extending into the substrate and methods of making the same | |
| JPH05137980A (en) | Membrane for separating vapor of organic solvent | |
| Chen et al. | Composite membranes prepared from glutaraldehyde cross-linked sulfonated cardo polyetherketone and its blends for the dehydration of acetic acid by pervaporation | |
| JPH0852332A (en) | Composite gas separation membrane and production thereof | |
| JPH04139237A (en) | Hydrophilic porous fluororesin material | |
| JP2002126479A (en) | Porous membrane, gas separating membrane and method of manufacturing for the same | |
| JPS62140608A (en) | Composite semipermeable membrane, its production, and treatment of aqueous solution | |
| JPH119974A (en) | Composite hollow-yarn membrane for external pressure gas separation and method for producing the same | |
| JPH06182167A (en) | Fluorine-containing polyimide-based gas separation membrane and method of mixture gas separation/ concentration using said membrane | |
| JPH051049B2 (en) | ||
| JPH02207827A (en) | Anisotropic hollow fiber composite membrane | |
| JPH09239248A (en) | Method for treatment of pervaporation membrane | |
| JPS5836617A (en) | Manufacture of film for separating gas | |
| JPS63278944A (en) | Porous membrane | |
| CA3136757C (en) | Method of wetting low surface energy substrate and a system therefor | |
| JPH0673229A (en) | Water-repellent porous membrane and its preparation |