JPH07155567A - Method for inspecting and repairing separation membrane for pervaporation - Google Patents

Method for inspecting and repairing separation membrane for pervaporation

Info

Publication number
JPH07155567A
JPH07155567A JP30505493A JP30505493A JPH07155567A JP H07155567 A JPH07155567 A JP H07155567A JP 30505493 A JP30505493 A JP 30505493A JP 30505493 A JP30505493 A JP 30505493A JP H07155567 A JPH07155567 A JP H07155567A
Authority
JP
Japan
Prior art keywords
separation membrane
membrane
pervaporation
pinholes
pinhole
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
Application number
JP30505493A
Other languages
Japanese (ja)
Inventor
Masakazu Kondo
正和 近藤
Taro Fujita
太郎 藤田
Shinichi Yamashita
信市 山下
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsui Engineering and Shipbuilding Co Ltd
Original Assignee
Mitsui Engineering and Shipbuilding Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsui Engineering and Shipbuilding Co Ltd filed Critical Mitsui Engineering and Shipbuilding Co Ltd
Priority to JP30505493A priority Critical patent/JPH07155567A/en
Publication of JPH07155567A publication Critical patent/JPH07155567A/en
Pending legal-status Critical Current

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  • Separation Using Semi-Permeable Membranes (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)

Abstract

PURPOSE:To quickly and easily inspect the defects of a separation membrane such as pinholes, even by a nonexpert by applying a hydrophobic coating material on the surface of a separation membrane for pervaporation consisting of a porous membrane of hydrophilic polymer material and then immediately wiping off the coating material. CONSTITUTION:A separation membrane 1 for pervaporation is inspected as follows. Namely, a hydrophobic coating material such as azobenzene is applied on a separation membrane consisting of a nonporous membrane made of hydrophilic polymer material such as cellulose acetate membrane and then immediately wiped off. When such a coating soln., is applied, the soln. is deposited on the part of the membrane surface free of pinholes and infiltrated into the pinhole. Consequently, when the soln. is immediately wiped off after coating, the soln. remains only in the pinhole, and the pinhole is easily recognized as the colored spot.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明はパーベーパレーション用
分離膜の検査法及び補修法に係り、特に、高分子材料製
非多孔質膜よりなるパーベーパレーション用分離膜のピ
ンホールの有無を容易に検査し、また、このピンホール
を容易に補修する方法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for inspecting and repairing a separation membrane for pervaporation, and more particularly, to the presence / absence of pinholes in a separation membrane for pervaporation made of a non-porous polymer material. In addition, the present invention relates to a method for easily inspecting and repairing this pinhole.

【0002】[0002]

【従来の技術】高分子材料製非多孔質膜を利用したパー
ベーパレーション法による液体混合物の分離プロセス
は、蒸留では分離が困難な混合物を分離可能であるこ
と、及び、蒸留に比べて省エネルギー化が図れることな
どの利点を有することから、近年、注目を集めている。
2. Description of the Related Art A separation process of a liquid mixture by a pervaporation method using a non-porous membrane made of a polymer material is capable of separating a mixture which is difficult to separate by distillation, and energy saving as compared with distillation. Since it has advantages such as being able to achieve

【0003】しかして、従来、パーベーパレーション用
分離膜としては、有機物選択透過性能が非常に優れてい
るシリコーン系膜(特開昭58−84005号公報)、
ポリアセチレン系膜(特開昭61−174905号公
報,特開平1−194903号公報)、ポリアクリル酸
系膜およびポリエーテル系膜、或いは、水選択性透過膜
であるセルロースアセテート膜(特開昭59−1092
04号公報)、ポリビニールアルコール膜、ポリエチレ
ンイミン系架橋膜(特開昭59−55305号公報)が
提供されている。
However, conventionally, as a separation membrane for pervaporation, a silicone-based membrane (JP-A-58-84005), which has a very excellent organic substance permeation performance,
Polyacetylene-based membranes (JP-A-61-174905 and JP-A-1-194903), polyacrylic acid-based membranes and polyether-based membranes, or cellulose acetate membranes which are water-selective permeable membranes (JP-A-59 / 1984). -1092
No. 04), a polyvinyl alcohol film, and a polyethyleneimine-based crosslinked film (JP-A-59-55305).

【0004】現在、このようなパーベーパレーション用
の平膜はシート状或いはロール状で生産され、モジュー
ル化(例えば、プレートアンドフレーム型モジュール
化)するに際しては、膜にピンホールが無いことを確認
した後、所定の大きさに裁断する。膜の検査は非常に熟
練した作業員により目視にて実施され、一方、裁断は非
熟練作業員により実施されている。
Currently, such flat membranes for pervaporation are produced in a sheet shape or a roll shape, and it is confirmed that there is no pinhole in the membrane when modularizing (for example, plate and frame type modularization). After that, it is cut into a predetermined size. The inspection of the membrane is carried out visually by very skilled workers, while the cutting is carried out by unskilled workers.

【0005】[0005]

【発明が解決しようとする課題】熟練した作業員の目視
による従来の分離膜の検査方法では、検査に多大な人手
と時間を要するという欠点がある。因みに、作業員の目
視による場合には、面積10m2 程度の分離膜の検査に
約1時間を要し、分離膜が複合膜等の特殊な膜である場
合には、確実にピンホールを見つけることは難しく、検
査には更に長い時間を要した。
However, the conventional method for inspecting a separation membrane by visual inspection by a skilled worker has a drawback in that the inspection requires a large amount of manpower and time. By the way, it takes about 1 hour to inspect a separation membrane with an area of about 10 m 2 when visually inspected by an operator, and if the separation membrane is a special membrane such as a composite membrane, pinholes are surely found. It was difficult and the inspection took a longer time.

【0006】しかも、従来において、分離膜にピンホー
ルが発見された場合、そのピンホールを簡単に補修する
方法が提案されておらず、この結果、ピンホールのある
分離膜はもとより、ピンホールの疑いのある分離膜にい
たるまで、多くの分離膜を欠陥品として廃棄しているこ
とから、多くの無駄が生じていた。
In addition, conventionally, when a pinhole is found in the separation film, no method for easily repairing the pinhole has been proposed. As a result, not only the separation film having the pinhole but also the pinhole is detected. Since many separation membranes have been discarded as defective products up to the suspected separation membrane, much waste has occurred.

【0007】本発明は上記従来の問題点を解決し、非熟
練者であってもすばやく容易に分離膜のピンホール等の
欠陥を検査することができる検査法、及び、少量のピン
ホールないしは亀裂のある分離膜を容易にかつすばやく
補修することができる補修法を提供することを目的とす
る。
The present invention solves the above-mentioned problems of the prior art and allows an unskilled person to quickly and easily inspect for defects such as pinholes in a separation membrane, and a small amount of pinholes or cracks. An object of the present invention is to provide a repairing method capable of easily and quickly repairing a separation membrane having a defect.

【0008】[0008]

【課題を解決するための手段】請求項1のパーベーパレ
ーション用分離膜の検査法は、親水性高分子材料製非多
孔質膜よりなるパーベーパレーション用分離膜のピンホ
ールの有無を検査する方法において、該分離膜表面に疎
水性ペイントを塗布した後、直ちに拭き取ることを特徴
とする。
The method for inspecting a separation membrane for pervaporation according to claim 1 inspects the presence or absence of pinholes in the separation membrane for pervaporation made of a non-porous membrane made of a hydrophilic polymer material. The method is characterized in that a hydrophobic paint is applied to the surface of the separation membrane and then immediately wiped off.

【0009】請求項2のパーベーパレーション用分離膜
の検査法は、疎水性高分子材料製非多孔質膜よりなるパ
ーベーパレーション用分離膜のピンホールの有無を検査
する方法において、該分離膜表面に親水性ペイント又は
墨汁を塗布した後、直ちに拭き取ることを特徴とする。
The method for inspecting a separation membrane for pervaporation according to claim 2 is a method for inspecting the presence or absence of pinholes in the separation membrane for pervaporation made of a non-porous membrane made of a hydrophobic polymer material. It is characterized in that it is wiped off immediately after applying hydrophilic paint or India ink on the surface.

【0010】請求項3のパーベーパレーション用分離膜
の補修法は、高分子材料製非多孔質膜よりなるパーベー
パレーション用分離膜のピンホールを補修する方法にお
いて、該ピンホールに耐溶剤性材料のシートの小片を貼
り付けることを特徴とする。
According to a third aspect of the present invention, there is provided a method for repairing a separation membrane for pervaporation, which is a method for repairing a pinhole of a separation membrane for pervaporation comprising a non-porous membrane made of a polymer material, wherein the pinhole has solvent resistance. Characterized by sticking a small piece of a sheet of material.

【0011】請求項4のパーベーパレーション用分離膜
の補修法は、高分子材料製非多孔質膜よりなるパーベー
パレーション用分離膜のピンホールを補修する方法にお
いて、該ピンホールに耐溶剤性材料の塗布液を塗布する
ことを特徴とする。
The method for repairing a separation membrane for pervaporation according to claim 4 is a method for repairing a pinhole of a separation membrane for pervaporation comprising a non-porous membrane made of a polymer material, wherein the pinhole has solvent resistance. It is characterized in that a coating solution of the material is applied.

【0012】以下に本発明を詳細に説明する。The present invention will be described in detail below.

【0013】本発明のパーベーパレーション用分離膜の
検査法においては、下記のような親水性高分子材料製
非多孔質膜よりなる分離膜にあっては、下記(a) のよう
な疎水性ペイントを塗布し、また、下記のような疎水
性高分子材料製非多孔質膜よりなる分離膜にあっては、
下記(b) のような親水性ペイント又は墨汁を塗布し、い
ずれの場合も塗布後直ちに拭き取る。
In the method for inspecting the separation membrane for pervaporation of the present invention, the separation membrane composed of a non-porous membrane made of a hydrophilic polymer as described below has the following hydrophobic property (a): Applying paint, and in the case of a separation membrane composed of a non-porous membrane made of a hydrophobic polymer material as described below,
Apply hydrophilic paint or India ink as shown in (b) below and wipe off immediately after application.

【0014】 親水性高分子材料製非多孔質膜 セルロースアセテート膜、ポリビニールアルコール膜、
ポリエチレンイミン系架橋膜、キトサン膜、アクリル酸
/アクリロニトリル共重合体膜等の水選択性透過膜 疎水性高分子材料製非多孔質膜 シリコーン系膜、ポリアセチレン系膜、ポリアクリル酸
系膜、ポリエーテル系膜、含フッ素ポリマー膜、ポリイ
ミド膜等の有機物選択透過膜 (a) 疎水性ペイント アゾベンゼン・アゾ−β−ナフトール、フルオレッセン 例えばスーパーチェック(浸透性UPT:マークテック
(株)製) (b) 親水性ペイント オレイン酸ヘキサノール、塩化セチルピリジウム なお、いずれのペイントについても分離膜とは異なる色
調に着色していることが重要である。
Non-porous membrane made of hydrophilic polymer material Cellulose acetate membrane, polyvinyl alcohol membrane,
Water-selective permeable membrane such as polyethyleneimine crosslinked membrane, chitosan membrane, acrylic acid / acrylonitrile copolymer membrane, etc. Non-porous membrane made of hydrophobic polymer material Silicone membrane, polyacetylene membrane, polyacrylic acid membrane, polyether Organic membranes such as system membranes, fluorine-containing polymer membranes, and polyimide membranes (a) Hydrophobic paints Azobenzene / azo-β-naphthol, Fluoressen For example, Super Check (penetrative UPT: Marktec Co., Ltd.) (b) Hydrophilic Sex paint Hexanol oleate, Cetylpyridinium chloride It is important that all paints are colored in a different color tone from the separation membrane.

【0015】このような塗布液を分離膜表面に塗布する
と、分離膜表面のうちピンホールのない部分には塗布液
は付着するのみであるが、ピンホールには塗布液が浸透
する。このため、塗布後、塗布液を直ちに拭き取ること
により、ピンホール内のみに塗布液が残りピンホール部
分を着色した斑点として容易に確認することができる。
When such a coating liquid is applied to the surface of the separation membrane, the coating liquid only adheres to the portion of the surface of the separation membrane where there are no pinholes, but the coating liquid penetrates into the pinholes. Therefore, by immediately wiping off the coating liquid after coating, the coating liquid remains only in the pinholes, and the pinhole portions can be easily confirmed as colored spots.

【0016】なお、塗布液の塗布方法としては、スプレ
ー塗布、刷毛塗り等が挙げられ、塗布量は、通常の場
合、分離膜の面積当り10〜100g/m2 程度とする
のが好ましい。
Examples of the method for applying the coating liquid include spray coating and brush coating. In the usual case, the coating amount is preferably about 10 to 100 g / m 2 per area of the separation membrane.

【0017】また、塗布後の拭き取りには、ティッシ
ュ、木綿等の分離膜を傷付けることのない柔らかい布を
用いれば良い。
For wiping after application, a soft cloth that does not damage the separation membrane such as tissue or cotton may be used.

【0018】一方、本発明のパーベーパレーション用分
離膜の補修法においては、分離膜のピンホール箇所を次
の(i) 又は(ii)により補修する。
On the other hand, in the method of repairing the separation membrane for pervaporation of the present invention, the pinhole portion of the separation membrane is repaired by the following (i) or (ii).

【0019】(i) ピンホールを覆うように耐溶剤性材
料よりなるシートの小片を貼り付ける。
(I) A small piece of a sheet made of a solvent resistant material is attached so as to cover the pinhole.

【0020】(ii) ピンホール部分に耐溶剤性材料の塗
布液を塗布する。
(Ii) A coating solution of a solvent resistant material is applied to the pinhole portion.

【0021】(i) の方法において、耐溶剤性材料のシー
トとしては、PTFE(ポリテトラフルオロエチレン)
フィルム、PVDF(ポリビニリデンフロライド)フィ
ルム、PDMS(ポリジメチルシロキサン)フィルム等
を用いることができ、その大きさは、ピンホールを十分
に覆う程度であれば良く、通常の場合、一辺又は直径が
5〜10mmの正方形状又は円形状で厚さ0.5〜2m
mのものを用いることができる。
In the method (i), the sheet of solvent resistant material is PTFE (polytetrafluoroethylene).
A film, a PVDF (polyvinylidene fluoride) film, a PDMS (polydimethylsiloxane) film, or the like can be used, and the size thereof may be such that the pinholes are sufficiently covered. Square or circular shape with 5-10 mm thickness 0.5-2 m
m can be used.

【0022】このようなシートの接着に用いる接着剤と
してはエポキシ、ウレタン、ポリビニルアルコール等を
用いることができる。
Epoxy, urethane, polyvinyl alcohol or the like can be used as an adhesive used for adhering such a sheet.

【0023】また、(ii)の方法において、塗布液として
は、光架橋性樹脂、熱架橋性樹脂等の高分子材料、好ま
しくは補修する分離膜の材料と同一の高分子材料を光重
合型プレポリマー含有溶剤等を用いて塗料化したものを
用いることができる。
In the method (ii), as the coating liquid, a polymer material such as a photo-crosslinking resin or a heat-crosslinking resin, preferably the same polymer material as that of the separation membrane to be repaired is photopolymerized It is possible to use a paint prepared by using a solvent containing a prepolymer.

【0024】この方法において、塗布液の塗布量は、分
離膜のピンホール内に塗布液が浸透すると共に、その周
囲に若干の塗膜が形成される程度の量であれば良い。
In this method, the coating amount of the coating liquid may be such that the coating liquid permeates into the pinholes of the separation membrane and a slight coating film is formed around the pinholes.

【0025】[0025]

【作用】ピンホールのある親水性(又は疎水性)高分子
材料製非多孔質膜の表面に、疎水性ペイント(又は親水
性ペイント、墨汁)を塗布すると、ピンホールには塗布
液が浸透する。一方、ピンホールのない膜表面は塗布液
が付着するのみである。このため、塗布後直ちに拭き取
ることにより、ピンホール内に塗布液が残り、これが斑
点となって容易に目視により確認することができる。こ
のため、分離膜表面への塗布液の塗布及び拭き取りとい
う簡単な作業で容易かつ迅速に、しかも確実にピンホー
ル等の欠陥を検出できる。
[Function] When a hydrophobic paint (or hydrophilic paint, India ink) is applied to the surface of a hydrophilic (or hydrophobic) polymer material with pinholes, the coating solution penetrates into the pinholes. . On the other hand, the coating liquid only adheres to the film surface without pinholes. Therefore, by wiping off immediately after application, the application liquid remains in the pinholes, and these become spots that can be easily visually confirmed. Therefore, it is possible to detect defects such as pinholes easily, quickly, and reliably by the simple work of applying the coating liquid to the surface of the separation membrane and wiping it off.

【0026】前述の如く、従来の熟練者の目視によるピ
ンホール検査では、面積10m2 程度の分離膜の検査に
約1時間を要し、複合膜、非対称膜、均質膜では更に長
い時間を要したが、本発明の検査法によれば、5分程度
で複合膜、非対称膜、均質膜を問わず検査を行える。
As described above, in the conventional visual inspection of pinholes by a skilled person, it takes about 1 hour to inspect a separation membrane having an area of about 10 m 2 , and a longer time is required for a composite membrane, an asymmetric membrane and a homogeneous membrane. However, according to the inspection method of the present invention, it is possible to inspect a composite film, an asymmetric film, and a homogeneous film in about 5 minutes.

【0027】また、分離膜のピンホール等の欠陥箇所に
耐溶剤性材料の小片を貼り付けることにより、或いは、
耐溶剤性材料の塗布液を塗布することにより、ピンホー
ル等の欠陥を容易かつ迅速に補修して液の漏洩を防ぐこ
とができ、ピンホールの全くない健全な分離膜と同等の
性能を有する分離膜とすることができる。
Further, by sticking a small piece of a solvent resistant material to a defective portion such as a pinhole of the separation membrane, or
By applying a coating solution of solvent-resistant material, defects such as pinholes can be repaired easily and quickly to prevent leakage of the solution, and it has the same performance as a sound separation membrane without pinholes. It can be a separation membrane.

【0028】[0028]

【実施例】以下に実施例を挙げて本発明をより具体的に
説明する。
EXAMPLES The present invention will be described in more detail with reference to the following examples.

【0029】なお、パーベーパレーション用分離膜の実
使用テストには、図1に示す装置を用いた。
The apparatus shown in FIG. 1 was used for the actual use test of the separation membrane for pervaporation.

【0030】図1において、1はパーベーパレーション
用分離膜、2はセル、3は被分離液であって、ポンプ1
1Aを備える配管11よりセル2内に導入され、熱交換
器12Aを備える配管12より排出される。4は排出液
である。また、分離膜1内の透過側は、真空ポンプ5に
より配管13,13A,13B,14を経て吸引され
0.1Torrの真空度とされている。透過物は液体窒
素により冷却して冷却トラップ5に集めた。15は窒素
ガスの排出配管である。
In FIG. 1, 1 is a separation membrane for pervaporation, 2 is a cell, 3 is a liquid to be separated, and a pump 1
It is introduced into the cell 2 through a pipe 11 including 1A and discharged through a pipe 12 including a heat exchanger 12A. 4 is the discharged liquid. Further, the permeation side in the separation membrane 1 is sucked by the vacuum pump 5 through the pipes 13, 13A, 13B, 14 and has a vacuum degree of 0.1 Torr. The permeate was cooled by liquid nitrogen and collected in a cooling trap 5. Reference numeral 15 is a nitrogen gas discharge pipe.

【0031】なお、被分離液はマグネチックスターラー
(図示せず)によって攪拌した。セル2は恒温槽(ガラ
スヒーター及びヒーターコントローラー)7内に設置さ
れており、表1に示す処理温度に調節されている。透過
側真空度は凝縮器、油回転ポンプと電磁弁により常に1
0Torrに保持した。液組成の測定はガスクロマトグ
ラフ又はカールフィッシャー水分計により行った。
The liquid to be separated was stirred by a magnetic stirrer (not shown). The cell 2 is installed in a constant temperature bath (glass heater and heater controller) 7 and adjusted to the processing temperature shown in Table 1. Permeability vacuum is always 1 by condenser, oil rotary pump and solenoid valve
It was kept at 0 Torr. The liquid composition was measured by a gas chromatograph or Karl Fischer moisture meter.

【0032】実施例1 一見欠陥を有していないと思われる1m2 のポリビニー
ルアルコール複合脱水膜の表面に、赤色の塗料含有スー
パーチェック(浸透液UPT:マークテック(株)製)
を約10g/m2 の割合でスプレー塗布し、その後、す
ばやく木綿製布で拭き取った。その結果、4カ所に赤い
斑点が得られた。このピンホール4カ所を含む有効膜面
積22.04cm2 の膜を図1に示すパーベーパレーシ
ョン測定装置でテストしたところ、ピンホール欠陥のた
めに所定の透過側真空度(10Torr)に到達させる
ことはできず、100Torrに維持するのがやっとで
あった。
Example 1 On the surface of a 1 m 2 polyvinyl alcohol composite dehydrated film which seems to have no defects, a super-check containing red paint (penetrating liquid UPT: manufactured by Mark Tech Co., Ltd.)
Was spray-applied at a rate of about 10 g / m 2 , and then quickly wiped off with a cotton cloth. As a result, red spots were obtained at four places. When a film having an effective film area of 22.04 cm 2 including 4 pinholes was tested by the pervaporation measuring device shown in FIG. 1, it was confirmed that a predetermined permeation side vacuum (10 Torr) was reached due to pinhole defects. I couldn't do that, and I could barely maintain it at 100 Torr.

【0033】この膜のピンホール箇所に各々1mm角の
PTFEフィルム(厚さ100μm)をペンダントポリ
ビニルアルコールを用いて接着し、その後、この膜をフ
ランジベースのセルにセットし、膜面上の供給側には2
50mlの被分離液を供給した。
A 1 mm square PTFE film (thickness: 100 μm) was adhered to each pinhole of this film using pendant polyvinyl alcohol, and then this film was set in a flange-based cell to supply the film on the supply side. Is 2
50 ml of liquid to be separated was supplied.

【0034】被分離液(供給液)は95重量%エタノー
ル水溶液を標準とし、濃度は経時的に変化するので水を
補充して濃度変化を極力抑えた。
The liquid to be separated (supplied liquid) is a 95 wt% ethanol aqueous solution as a standard, and since the concentration changes with time, water was replenished to suppress the concentration change as much as possible.

【0035】分離膜の透過性能は単位面積、単位時間当
りの全透過量(g/m2 ・hr)と分離係数αにより比
較した。分離係数αは以下の式により求めた。
The permeation performance of the separation membrane was compared by the unit area, the total permeation amount (g / m 2 · hr) per unit time and the separation coefficient α. The separation coefficient α was calculated by the following formula.

【0036】[0036]

【数1】 [Equation 1]

【0037】表1に上記補修分離膜を用いた場合のテス
ト結果を示す。また、比較のため、欠陥のない健全な分
離膜を用いて同様にテストを行った結果を示す。
Table 1 shows the test results when the repair separation membrane was used. For comparison, the results of the same test performed using a sound separation film having no defects are also shown.

【0038】[0038]

【表1】 [Table 1]

【0039】表1に示すごとく、本発明で補修した分離
膜と欠陥の無い分離膜の性能は全く同等で、本発明の方
法が省力、省時間、膜の有効利用に効果的であることが
明らかである。
As shown in Table 1, the performance of the separation membrane repaired by the present invention is exactly the same as that of the separation membrane without defects, and the method of the present invention is effective for labor saving, time saving and effective utilization of the membrane. it is obvious.

【0040】実施例2 疎水性高分子材料であるPEBA(ポリエーテルブロッ
クアミド)製分離膜について、塗布液として墨汁を用い
たこと以外は実施例1と同様にしてピンホールの有無を
検査した。その結果、3カ所に黒色の斑点が認められ
た。
Example 2 With respect to the separation membrane made of PEBA (polyether block amide) which is a hydrophobic polymer material, the presence or absence of pinholes was inspected in the same manner as in Example 1 except that ink was used as the coating solution. As a result, black spots were found at three places.

【0041】この膜のピンホール箇所に、耐水性のPE
BA粒子をn−ブタノール/クロロホルム=4:1で塗
料化したものを塗布してピンホールの補修を行った。
Water resistant PE was applied to the pinholes of this film.
The pinholes were repaired by applying the BA particles made into a paint with n-butanol / chloroform = 4: 1.

【0042】この補修膜について、被分離液として5重
量%フェノール水溶液を用いて実施例1と同様にしてテ
ストを行い、健全膜のテスト結果と比較したところ、そ
の性能は健全膜と全く同等であった。
This repaired membrane was tested in the same manner as in Example 1 using a 5% by weight aqueous phenol solution as the liquid to be separated, and compared with the test results of the sound membrane, the performance was exactly the same as that of the sound membrane. there were.

【0043】[0043]

【発明の効果】以上詳述した通り、本発明のパーベーパ
レーション用分離膜の検査法によれば、分離膜のピンホ
ール等の欠陥を熟練した技術を要することなく、容易か
つ迅速に、しかも確実に検出することができ、また、本
発明のパーベーパレーション用分離膜の補修法によれ
ば、少量のピンホールや亀裂等の欠陥を容易かつ迅速に
補修することができる。
As described in detail above, according to the method for inspecting a separation membrane for pervaporation of the present invention, defects such as pinholes in the separation membrane can be easily and quickly obtained without requiring a skilled technique. According to the method for repairing the separation film for pervaporation of the present invention, defects such as pinholes and cracks can be easily and quickly repaired.

【0044】従って、本発明によれば、パーベーパレー
ション用分離膜の欠陥検査及び欠陥のある分離膜の補修
を容易かつ効率的に行うことにより、省力、省時間を図
ると共に、分離膜の有効利用を図ることが可能とされ
る。
Therefore, according to the present invention, the inspection of defects in the separation membrane for pervaporation and the repair of the defective separation membrane can be carried out easily and efficiently, thereby saving labor and time and improving the effectiveness of the separation membrane. It can be used.

【図面の簡単な説明】[Brief description of drawings]

【図1】実施例で用いたパーベーパレーション測定装置
の系統図である。
FIG. 1 is a system diagram of a pervaporation measuring device used in Examples.

【符号の説明】[Explanation of symbols]

1 パーベーパレーション用分離膜 2 セル 3 被分離液 4 排出液 5 真空ポンプ 6A,6B 冷却トラップ 7 恒温槽 1 Separation Membrane for Pervaporation 2 Cell 3 Liquid to be Separated 4 Discharged Liquid 5 Vacuum Pump 6A, 6B Cooling Trap 7 Constant Temperature Bath

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 親水性高分子材料製非多孔質膜よりなる
パーベーパレーション用分離膜のピンホールの有無を検
査する方法において、該分離膜表面に疎水性ペイントを
塗布した後、直ちに拭き取ることを特徴とするパーベー
パレーション用分離膜の検査法。
1. A method for inspecting the presence or absence of pinholes in a separation membrane for pervaporation comprising a non-porous membrane made of a hydrophilic polymer material, which comprises applying hydrophobic paint to the surface of the separation membrane and then immediately wiping it off. A method for inspecting a separation membrane for pervaporation characterized by.
【請求項2】 疎水性高分子材料製非多孔質膜よりなる
パーベーパレーション用分離膜のピンホールの有無を検
査する方法において、該分離膜表面に親水性ペイント又
は墨汁を塗布した後、直ちに拭き取ることを特徴とする
パーベーパレーション用分離膜の検査法。
2. A method for inspecting the presence or absence of pinholes in a separation membrane for pervaporation comprising a non-porous membrane made of a hydrophobic polymer material, which is immediately after applying hydrophilic paint or India ink on the surface of the separation membrane. An inspection method for a separation membrane for pervaporation, which is characterized by wiping.
【請求項3】 高分子材料製非多孔質膜よりなるパーベ
ーパレーション用分離膜のピンホールを補修する方法に
おいて、該ピンホールに耐溶剤性材料のシートの小片を
貼り付けることを特徴とするパーベーパレーション用分
離膜の補修法。
3. A method for repairing a pinhole of a separation membrane for pervaporation comprising a non-porous membrane made of a polymer material, characterized in that a small piece of a sheet of solvent resistant material is attached to the pinhole. Repair method of separation membrane for pervaporation.
【請求項4】 高分子材料製非多孔質膜よりなるパーベ
ーパレーション用分離膜のピンホールを補修する方法に
おいて、該ピンホールに耐溶剤性材料の塗布液を塗布す
ることを特徴とするパーベーパレーション用分離膜の補
修法。
4. A method for repairing pinholes of a separation membrane for pervaporation comprising a non-porous membrane made of a polymer material, wherein a coating solution of a solvent resistant material is applied to the pinholes. Repair method for separation membrane for vaporization.
JP30505493A 1993-12-06 1993-12-06 Method for inspecting and repairing separation membrane for pervaporation Pending JPH07155567A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP30505493A JPH07155567A (en) 1993-12-06 1993-12-06 Method for inspecting and repairing separation membrane for pervaporation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP30505493A JPH07155567A (en) 1993-12-06 1993-12-06 Method for inspecting and repairing separation membrane for pervaporation

Publications (1)

Publication Number Publication Date
JPH07155567A true JPH07155567A (en) 1995-06-20

Family

ID=17940567

Family Applications (1)

Application Number Title Priority Date Filing Date
JP30505493A Pending JPH07155567A (en) 1993-12-06 1993-12-06 Method for inspecting and repairing separation membrane for pervaporation

Country Status (1)

Country Link
JP (1) JPH07155567A (en)

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* Cited by examiner, † Cited by third party
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JP2011507001A (en) * 2007-12-17 2011-03-03 ライフ テクノロジーズ コーポレーション Method for detecting defects in polymer surfaces coated with inorganic materials
WO2012090874A1 (en) * 2010-12-27 2012-07-05 北越紀州製紙株式会社 Wet-laid nonwoven fabric for semipermeable membrane supporting body, method for producing said wet-laid nonwoven fabric, and method for identifying low-density defect of wet-laid nonwoven fabric
JP2015027644A (en) * 2013-07-30 2015-02-12 富士フイルム株式会社 Method of producing acceleration transfer type separation membrane and acceleration transfer type separation membrane
US9310315B2 (en) 2007-12-17 2016-04-12 Life Technologies Corporation Methods for detecting defects in inorganic-coated polymer surfaces

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011507001A (en) * 2007-12-17 2011-03-03 ライフ テクノロジーズ コーポレーション Method for detecting defects in polymer surfaces coated with inorganic materials
US9310315B2 (en) 2007-12-17 2016-04-12 Life Technologies Corporation Methods for detecting defects in inorganic-coated polymer surfaces
WO2012090874A1 (en) * 2010-12-27 2012-07-05 北越紀州製紙株式会社 Wet-laid nonwoven fabric for semipermeable membrane supporting body, method for producing said wet-laid nonwoven fabric, and method for identifying low-density defect of wet-laid nonwoven fabric
KR101510976B1 (en) * 2010-12-27 2015-04-10 호쿠에츠 기슈 세이시 가부시키가이샤 Wet-laid nonwoven fabric for semipermeable membrane supporting body, method for producing said wet-laid nonwoven fabric, and method for identifying low-density defect of wet-laid nonwoven fabric
JP5934655B2 (en) * 2010-12-27 2016-06-15 北越紀州製紙株式会社 Method for producing wet nonwoven fabric for semipermeable membrane support and method for confirming low density defects thereof
US10443167B2 (en) 2010-12-27 2019-10-15 Hokuetsu Corporation Method for producing a wet-laid nonwoven fabric
JP2015027644A (en) * 2013-07-30 2015-02-12 富士フイルム株式会社 Method of producing acceleration transfer type separation membrane and acceleration transfer type separation membrane

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