JPH03245827A - Dehydration of permselective hollow fiber membrane - Google Patents
Dehydration of permselective hollow fiber membraneInfo
- Publication number
- JPH03245827A JPH03245827A JP4214990A JP4214990A JPH03245827A JP H03245827 A JPH03245827 A JP H03245827A JP 4214990 A JP4214990 A JP 4214990A JP 4214990 A JP4214990 A JP 4214990A JP H03245827 A JPH03245827 A JP H03245827A
- Authority
- JP
- Japan
- Prior art keywords
- hollow fiber
- fiber membrane
- water
- permselective
- permselective hollow
- 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.)
- Granted
Links
- 239000012528 membrane Substances 0.000 title claims abstract description 58
- 239000012510 hollow fiber Substances 0.000 title claims abstract description 36
- 230000018044 dehydration Effects 0.000 title description 7
- 238000006297 dehydration reaction Methods 0.000 title description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 12
- 238000009987 spinning Methods 0.000 claims abstract description 3
- 239000007864 aqueous solution Substances 0.000 claims description 5
- 230000035699 permeability Effects 0.000 abstract description 13
- 239000012530 fluid Substances 0.000 abstract description 11
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 abstract description 8
- 238000000926 separation method Methods 0.000 abstract description 8
- 229910052943 magnesium sulfate Inorganic materials 0.000 abstract description 4
- 235000019341 magnesium sulphate Nutrition 0.000 abstract description 4
- 238000007654 immersion Methods 0.000 abstract description 3
- 238000000137 annealing Methods 0.000 abstract description 2
- 238000005406 washing Methods 0.000 abstract description 2
- 208000005156 Dehydration Diseases 0.000 description 6
- 230000007423 decrease Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- ALYNCZNDIQEVRV-UHFFFAOYSA-N 4-aminobenzoic acid Chemical compound NC1=CC=C(C(O)=O)C=C1 ALYNCZNDIQEVRV-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 125000003118 aryl group Chemical group 0.000 description 2
- 229920002301 cellulose acetate Polymers 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000011796 hollow space material Substances 0.000 description 2
- QQVIHTHCMHWDBS-UHFFFAOYSA-N isophthalic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920000768 polyamine Polymers 0.000 description 2
- 238000001223 reverse osmosis Methods 0.000 description 2
- HYYVCACCUFXMMU-UHFFFAOYSA-N 3-(7-azabicyclo[4.1.0]hepta-1,3,5-triene-7-carbonyl)benzamide Chemical compound NC(=O)C1=CC=CC(C(=O)N2C3=CC=CC=C32)=C1 HYYVCACCUFXMMU-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- 229920001747 Cellulose diacetate Polymers 0.000 description 1
- 241000243251 Hydra Species 0.000 description 1
- 229920001007 Nylon 4 Polymers 0.000 description 1
- 229920002292 Nylon 6 Polymers 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- 229920002164 Polyalkylene glycol copolymer Polymers 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 229960004050 aminobenzoic acid Drugs 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000000502 dialysis Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- QRXWMOHMRWLFEY-UHFFFAOYSA-N isoniazide Chemical compound NNC(=O)C1=CC=NC=C1 QRXWMOHMRWLFEY-UHFFFAOYSA-N 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- INHCSSUBVCNVSK-UHFFFAOYSA-L lithium sulfate Inorganic materials [Li+].[Li+].[O-]S([O-])(=O)=O INHCSSUBVCNVSK-UHFFFAOYSA-L 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- -1 nylon- 88 Polymers 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920001447 polyvinyl benzene Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 description 1
- 229910052939 potassium sulfate Inorganic materials 0.000 description 1
- 235000011151 potassium sulphates Nutrition 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 125000000020 sulfo group Chemical group O=S(=O)([*])O[H] 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- RBTVSNLYYIMMKS-UHFFFAOYSA-N tert-butyl 3-aminoazetidine-1-carboxylate;hydrochloride Chemical compound Cl.CC(C)(C)OC(=O)N1CC(N)C1 RBTVSNLYYIMMKS-UHFFFAOYSA-N 0.000 description 1
- GETQZCLCWQTVFV-UHFFFAOYSA-N trimethylamine Chemical compound CN(C)C GETQZCLCWQTVFV-UHFFFAOYSA-N 0.000 description 1
- 238000000108 ultra-filtration Methods 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業」−１の利用分身）
本発明は、液体中の成分の分離、濃縮に用いられる選択
透過性中空繊維膜の流体透過性を下げることなく選択透
過性中空繊維膜を脱水する方法を提供するものである。Detailed Description of the Invention (Usage of Industry-1) The present invention provides a method for forming selectively permeable hollow fiber membranes without lowering the fluid permeability of permselective hollow fiber membranes used for separating and concentrating components in liquids. A method for dehydrating membranes is provided.
（従来の技術）
・般に、流体中の成分の分離またはｌ：ｉ縮は、選択透
過性膜を使用して逆浸透法または限外濾過法によって行
われる。この際の流体分離速度は膜面積に比例するため
に、いかにして容積効率を」二げかつ膜面積を大きくす
るかが課題であり、その解決手段として選択透過性中空
繊維膜か開発された。(Prior Art) - Separation or l:i reduction of components in a fluid is generally performed by reverse osmosis or ultrafiltration using selectively permeable membranes. Since the fluid separation rate in this case is proportional to the membrane area, the problem was how to increase the volumetric efficiency and increase the membrane area, and a permselective hollow fiber membrane was developed as a solution. .
このような選択透過性中空繊維膜のモジュール化には接
着工程があり、その際湿潤した選択透過性中空繊維膜の
中空部の水を除去しなければならない。なぜならば、接
腎［、程でモジュールを倒、ｆ７したときに、中空部の
水が接着部にしたたり落ち、接着を阻害するからである
。一方、膜内の水は膜性能維持のために保持することか
必要である。Modularization of such a permselective hollow fiber membrane involves an adhesion step, during which water in the hollow portion of the permselective hollow fiber membrane must be removed. This is because when the module is folded down at f7, the water in the hollow part drips onto the adhesive part and inhibits adhesion. On the other hand, it is necessary to retain water within the membrane to maintain membrane performance.
従来、選択透過性中空繊維膜の脱水方法としては、特開
昭５７−２１９０３かある。しかしながら、いくつかの
選択透過性中空繊維膜では、この方法による処理では接
着工程での倒立の際に、中空部の水がしたたり落ち、接
ｄを阻害した。そこで、鋭意研究を市ねた結束、硫酸塩
水溶液による脱水か最も効果があることかわかった。A conventional method for dehydrating permselective hollow fiber membranes is disclosed in Japanese Patent Application Laid-Open No. 57-21903. However, in some permselective hollow fiber membranes, when the membranes are inverted during the adhesion process, water in the hollow parts drips down and impairs adhesion. After extensive research, it was discovered that dehydration using a sulfate aqueous solution was the most effective.
（発明か解決しようとする課題）
本発明は、選択透過性中空繊維膜の流体透過性を低丁さ
せるこ上なく選択透過性中空繊維膜の中空部の水を除（
方法を提供するものである。(Problems to be Solved by the Invention) The present invention aims at removing water from the hollow portion of the permselective hollow fiber membrane without reducing the fluid permeability of the permselective hollow fiber membrane.
The present invention provides a method.
（課題を解決するための手段）
本発明は、紡糸後、水洗、アニール処理した湿潤状態の
選択透過性中空繊維膜を０．３〜３．０Ｊ／（硫酸塩水
溶液に５〜１８０分間、２０〜９０℃で浸漬処理し、中
空部の水を除去することを特徴とする選択透過性中空繊
維膜の脱水方法である。(Means for Solving the Problems) The present invention provides a wet permselective hollow fiber membrane that has been spun, washed with water, and annealed. This is a method for dehydrating a permselective hollow fiber membrane, which is characterized by immersion treatment at ~90°C to remove water in the hollow portion.
本発明の方法を適用しうる選択透過性中空繊維膜として
は、例えば芳香族系コポリアミドもしくは、酢酸セルロ
ース、二酢酸セルロース、−７酢酸セルロースまたはこ
れらの混合物、もしくは透導体ポリヒドロキノエチル（
メタ）アクリレートまたはその共重合体、ポリアクリル
酸共重合体、ナイロン−４、ナイロン−６、ナイロン−
８８、ポリエチレンオ共重合体、Ｐ−フェニレンイソフ
タルアミドのようなポリアミド、Ｐ−アミノ安息香酸ヒ
トラッド、イソフタル酸／ヒドラ／ドまたはそれらの１
Ａ導体のようなポリヒトランド、ポリビニルアセクール
、ポリエステル−ポリアルキレングリコール共重合体、
ポリスチレンスルホ／酸−ポリビニルベンゼントリメチ
ルアンモニウムのような物質を主とし、紡糸法によって
選択透過性中空繊維膜に成形したものか使用されるが、
これらの物質に限定されるものではない。Examples of permselective hollow fiber membranes to which the method of the present invention can be applied include aromatic copolyamides, cellulose acetate, cellulose diacetate, -7 cellulose acetate, or mixtures thereof, or the transparent conductor polyhydroquinoethyl (
meth)acrylate or its copolymer, polyacrylic acid copolymer, nylon-4, nylon-6, nylon-
88, polyethylene oxide copolymers, polyamides such as P-phenylene isophthalamide, P-aminobenzoic acid hydrad, isophthalic acid/hydra/do or one thereof
A conductor-like polyhydrand, polyvinyl acecool, polyester-polyalkylene glycol copolymer,
It is mainly made of materials such as polystyrene sulfo/acid-polyvinylbenzene trimethylammonium, and is formed into a permselective hollow fiber membrane by a spinning method.
It is not limited to these substances.
上記選択透過性中空繊維膜を硫酸塩水溶液に浸漬処理す
るが、使用する塩としては、硫酸リチウム、硫酸ナトリ
ウム、硫酸カリウム、硫酸マグネ／ラム等がある。特に
、硫酸マグネシウムの効果か大きく、この結晶水を用い
ることが溶解の点からも好ましい。The permselective hollow fiber membrane is immersed in an aqueous sulfate solution, and the salts used include lithium sulfate, sodium sulfate, potassium sulfate, and magne/rum sulfate. In particular, the effect of magnesium sulfate is large, and it is preferable to use this water of crystallization from the viewpoint of dissolution.
これらの硫酸塩は、好ましくは０．３〜３．０加Ｑ／Ｑ
１さらに好ましくは０．５〜１．５加Ｑ／Ｑの水溶液と
して使用する。硫酸塩濃度が極端に低いと本発明の効果
すなわち流体透過性を下げることなく中空部の水を除く
ことができないし、また１度か極端に高いと膜の脱水和
が強く行われて膜のゲル構造が破壊されて脱水、脱水の
ｉＪ逆性が失われ、膜の流体透過性か著しく低下する。These sulfates are preferably 0.3 to 3.0 added Q/Q
1 More preferably, it is used as an aqueous solution with an addition Q/Q of 0.5 to 1.5. If the sulfate concentration is extremely low, the effect of the present invention, that is, the water in the hollow part cannot be removed without reducing the fluid permeability, and if the sulfate concentration is extremely high, the membrane will be strongly dehydrated and the membrane will deteriorate. The gel structure is destroyed, dehydration and iJ reversibility of dehydration are lost, and the fluid permeability of the membrane is significantly reduced.
Ｌ記硫酸塩水溶液に中空繊維膜を浸漬する際には
、選択透過性中空繊維膜はｌ！Ｉ！潤状態で浸漬する。When a hollow fiber membrane is immersed in an aqueous sulfate solution, the permselective hollow fiber membrane is l! I! Soak in a moist state.
選択透過性中空繊維膜が乾燥すると選択透過性を小すゲ
ル状細孔か閉塞して透過性か低下するからである。−漬
処理は、温度２０〜９０℃好ましくは３０〜７０°Ｃて
行い、処理時間は、硫酸塩の種類、濃度等によって名「
の相違はあるが、通常１分〜１８０分間、好ましくは５
分〜３０分である。処理時間が短すぎると硫酸塩の選択
透過性中空繊維膜内への拡散が不１・分で、本発明の効
果を発揮しない欠点かあり、逆に処理時Ｕ川か長すぎる
と選択透過性中空繊維膜の硫酸塩水溶液濃度が−１−昇
し、旦脱水された水かｉｆｆび吸収される現象が起こり
、効果か減退する欠点がある。次に、この選択透過性中
空繊維膜を遠心脱水処理等にかけて表面の水分を除去す
る。This is because when the permselective hollow fiber membrane dries, the gel-like pores that reduce the permselectivity become clogged and the permeability decreases. - The soaking treatment is carried out at a temperature of 20 to 90°C, preferably 30 to 70°C, and the treatment time varies depending on the type and concentration of the sulfate.
Although there are differences, it is usually 1 minute to 180 minutes, preferably 5 minutes.
The time is between 30 minutes and 30 minutes. If the treatment time is too short, the diffusion of sulfate into the permselective hollow fiber membrane will take less than 1 minute, which may prevent the effects of the present invention from being exerted.On the other hand, if the treatment time is too long, the permselectivity will decrease. There is a drawback that the concentration of the sulfate aqueous solution in the hollow fiber membrane increases by -1-, and the water that has been dehydrated is iffed and absorbed, resulting in a decrease in effectiveness. Next, this permselective hollow fiber membrane is subjected to centrifugal dehydration treatment or the like to remove surface moisture.
本発明の処理を施すこきによって、中空部の水を除去す
ることができる。これによって接着工程での、モノニー
ル倒＼γ中の水のしたたりか阻１）二でき、完全な接ν
ｔか可能となる。また収縮率の形状変化か少な（なるこ
とは、モノニールを組み立てる上で極めて有利である。Water in the hollow portion can be removed by the plow subjected to the treatment of the present invention. This prevents water from dripping into the monolayer during the adhesion process, resulting in complete contact.
It becomes possible. In addition, the shrinkage rate and shape change are small, which is extremely advantageous in assembling monoyl.
すなわち、選択透過性中空繊維膜は、表面積か大きいた
めにモジュールとして組み立てる際、短時間で水が蒸発
し、乾燥し過ぎて膜性能、特に流体透過性が低下する。That is, since the permselective hollow fiber membrane has a large surface area, when assembled into a module, water evaporates in a short period of time and the membrane becomes too dry, resulting in a decrease in membrane performance, particularly fluid permeability.
しかしながら、本発明の処理を施した選択透過性中空繊
維膜は、膜内の水分は保持されているために含水率の低
下か遅く、膜性能、すなわち流体透過性及び成分分離能
に変化がない。さらには遠心脱水によって膜表面の水分
は除去されているために、樹脂により該選択透過性中空
！１！維膜東を強固に接着することができ、頑丈なモジ
ュールを容易に得ることができる。従来の方法（特開昭
５７−２１９０３）では、いくつかの選択透過性中空繊
維膜の中空部の水を十分に除去できない状態で樹脂によ
る接着を行っており、そのために剥離を起こしたり、選
択透過性中空繊維膜の収縮によって樹脂層内でひび割れ
を起こしたりしてリークが発生していた。このことを４
慮すれば、本発明は実用−１−きわめて有益な発明であ
る。しかも、本発明の処理を施したモンユールは、水中
に浸漬することによって流体透過性及び成分分離能にな
んらの変化はな（、優れた分離性能を発揮する。However, in the permselective hollow fiber membrane subjected to the treatment of the present invention, the moisture content decreases slowly because the moisture within the membrane is retained, and there is no change in membrane performance, that is, fluid permeability and component separation ability. . Furthermore, since the water on the membrane surface is removed by centrifugal dehydration, the permselective hollow space is created by the resin! 1! The fiber membrane can be firmly bonded and a sturdy module can be easily obtained. In the conventional method (Japanese Unexamined Patent Publication No. 57-21903), resin is used to adhere some selectively permeable hollow fiber membranes in a state where water cannot be sufficiently removed from the hollow part of the membrane, which may cause peeling or selective permeability. The shrinkage of the permeable hollow fiber membrane caused cracks within the resin layer, causing leaks. This 4
Taking this into consideration, the present invention is a practical-1 extremely useful invention. Furthermore, Monyur treated according to the present invention exhibits excellent separation performance without any change in fluid permeability or component separation ability when immersed in water.
本発明の処理を施した選択透過性中空繊維膜を組み込ん
たモノニールは、水中の各種塩類、有機低分子類化合物
の分離、濃縮、品分Ｙ化合物の透析等に使用されて、著
しい効果を発揮するか、この用途に限定されるものでは
ない。Mononyl incorporating a selectively permeable hollow fiber membrane treated according to the present invention can be used for the separation and concentration of various salts and organic low molecular weight compounds in water, and the dialysis of grade Y compounds, etc., and exhibits remarkable effects. However, it is not limited to this use.
次に実施例及び比較例を用いて本発明を史に詳細に説明
する。Next, the present invention will be explained in detail using Examples and Comparative Examples.
（実施例）
芳香族系ポリアミ／化合物と脂肪族ポリアミン化合物を
混合ポリアミン成分とし、芳香族ポリカルボン酸を酸成
分としたコポリアミドを主成分とし、水洗、アニール後
の湿潤状態の選択透過性中空繊維膜（含水率６０％）を
第１表のような硫酸マグネンウム水溶液（３０℃）に５
分間浸漬し、ただちに表面材ＮＦ水を遠心骨ｉ１ｔ （
１，４００ｒｐｍ、７００Ｇ１２０分間、室温）シた。(Example) A permselective hollow in a wet state after washing with water and annealing, the main component being a copolyamide with a mixed polyamine component of an aromatic polyamide/compound and an aliphatic polyamine compound and an acid component of aromatic polycarboxylic acid. A fiber membrane (60% water content) was added to a magnesium sulfate aqueous solution (30°C) as shown in Table 1 for 5 minutes.
Soak for a minute, then immediately centrifuge the surface material NF water (
1,400 rpm, 700G for 120 minutes, room temperature).
得られた選択透過性中空繊維膜の含水率を測定した結果
、４６％になった。これは、中空部の水か除去されたと
推ｐてきる数値である。この選択透過性中空繊維膜をモ
ジュール化し、膜性能試験を実施した結果、塩除去率、
透水量共に好ましい結果が得られた。The moisture content of the obtained permselective hollow fiber membrane was measured and found to be 46%. This is a value that indicates that water in the hollow portion has been removed. As a result of modularizing this permselective hollow fiber membrane and conducting membrane performance tests, the salt removal rate,
Favorable results were obtained in terms of water permeability.
そして、モンユールを分解して接着部を観察した結果、
リークは１つも認められなかった。（第１表）
なお膜性能試験は、１度０．１５重量％の食塩水を用い
て操作圧３０ ｋｇ ／ ｃｙｉｌ−Ｇ ％温度２５℃
、回収率５．０％の条件で逆浸透処理を行った。Then, as a result of disassembling Monyur and observing the adhesive part,
Not a single leak was observed. (Table 1) The membrane performance test was performed once using 0.15% by weight saline at an operating pressure of 30 kg/cyl-G% and a temperature of 25°C.
, reverse osmosis treatment was performed under the conditions of a recovery rate of 5.0%.
（比較例１．２）
硫酸マグネシウム水／８液中への浸漬処理を行わすに脱
水のみを施したものを比較例１として、また従来の方法
（特開昭５７−２１９０３）を用いたものを比較例２と
して、実施例と同じ膜性能試験を行った結果を第１表に
掲げた。共に塩除去率が低ドし、透水−１，が増大した
ため、モジュールを分解して接着部を観察したところ、
リークが認められた。(Comparative Example 1.2) Comparative Example 1 is one in which only dehydration was performed after immersion treatment in magnesium sulfate water/8 solution, and one in which a conventional method (Japanese Patent Application Laid-open No. 57-21903) was used. The same membrane performance test as in the example was conducted using Comparative Example 2, and the results are listed in Table 1. In both cases, the salt removal rate was low and the water permeability -1 increased, so when we disassembled the module and observed the bonded parts, we found that:
Leak confirmed.
（発明の効果）
以−に記載のように、本発明は、選択透過性中空繊維膜
を硫酸水溶液に浸漬処理し、選択透過性中空繊維膜の流
体透過性及び成分分離能を低減することなく中空部の水
を除去する方法を提供するものである。(Effects of the Invention) As described below, the present invention immerses a permselective hollow fiber membrane in an aqueous sulfuric acid solution to obtain a membrane without reducing the fluid permeability and component separation ability of the permselective hollow fiber membrane. The present invention provides a method for removing water from a hollow space.
Claims (1)
中空繊維膜を０．３〜３．０ｍｏｌ／ｌ硫酸塩水溶液に
１〜１８０分間、２０〜９０℃で浸漬処理し、中空部の
水を除去することを特徴とする選択透過性中空繊維膜の
脱水方法。After spinning, the permselective hollow fiber membrane in a wet state that has been washed with water and annealed is immersed in a 0.3 to 3.0 mol/l sulfate aqueous solution at 20 to 90°C for 1 to 180 minutes to remove the water in the hollow part. 1. A method for dehydrating a permselective hollow fiber membrane, the method comprising: removing water from a permselective hollow fiber membrane;
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4214990A JP2890618B2 (en) | 1990-02-22 | 1990-02-22 | Dehydration method of permselective hollow fiber membrane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4214990A JP2890618B2 (en) | 1990-02-22 | 1990-02-22 | Dehydration method of permselective hollow fiber membrane |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03245827A true JPH03245827A (en) | 1991-11-01 |
| JP2890618B2 JP2890618B2 (en) | 1999-05-17 |
Family
ID=12627887
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4214990A Expired - Fee Related JP2890618B2 (en) | 1990-02-22 | 1990-02-22 | Dehydration method of permselective hollow fiber membrane |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2890618B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0604883A3 (en) * | 1992-12-30 | 1995-02-15 | Hoechst Ag | Process for preparing porous hydrophilic membranes. |
-
1990
- 1990-02-22 JP JP4214990A patent/JP2890618B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0604883A3 (en) * | 1992-12-30 | 1995-02-15 | Hoechst Ag | Process for preparing porous hydrophilic membranes. |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2890618B2 (en) | 1999-05-17 |
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