JPS58170502A - Removal of contaminant of membrane - Google Patents
Removal of contaminant of membraneInfo
- Publication number
- JPS58170502A JPS58170502A JP5442482A JP5442482A JPS58170502A JP S58170502 A JPS58170502 A JP S58170502A JP 5442482 A JP5442482 A JP 5442482A JP 5442482 A JP5442482 A JP 5442482A JP S58170502 A JPS58170502 A JP S58170502A
- Authority
- JP
- Japan
- Prior art keywords
- membrane
- water
- weight
- contaminated
- org
- 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)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
Description
【発明の詳細な説明】
本発明はアニオン系電着塗料含有液の膜分離処理に使用
した透過膜に付着している汚染物の除去方法に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for removing contaminants adhering to a permeable membrane used for membrane separation treatment of a liquid containing anionic electrodeposition paint.
従来より自動車工場、家庭電器製造工場等において電着
塗料を用いた電着塗装が行なわれているつこの電着塗装
は塗装浴槽内に物品を浸漬して通電し、その表面に塗料
樹脂を電着させ、しかるのちこれを引き上げて付着して
いる余分の塗料を水洗工程で洗浄するものである0この
洗浄後の水洗水中には回収価値の高い塗料が多量に含ま
れているため、透過膜を用いて水洗水中の溶剤としての
水、アミン、その他金属塩、金属イオン等を取シ除いて
有価塗料を回収すると共に得られた透過液を水洗用水と
して再利用する方法が用いられている。Electrodeposition painting, which has traditionally been carried out using electrodeposition paint in automobile factories, home appliance manufacturing factories, etc., involves dipping the object in a paint bath and applying electricity to coat the surface with paint resin. After that, it is pulled up and the excess paint that has adhered to it is washed away with water.0 Since the washing water after this washing contains a large amount of paint that has a high recovery value, the permeable membrane A method is used in which water as a solvent, amines, other metal salts, metal ions, etc. are removed from the washing water using a rinsing water, valuable paint is recovered, and the obtained permeate is reused as washing water.
ところがこのような透過膜を長期間使用すると、膜面に
電着塗料固廖分等の汚染物が付着して透過水量の減少、
圧損の増大等とい−、た不都合な問題が生じてくる。However, when such a permeable membrane is used for a long period of time, contaminants such as electrodeposited paint particles adhere to the membrane surface, resulting in a decrease in the amount of permeated water.
Other inconvenient problems arise, such as increased pressure loss.
このような不都合を解消するために、汚染物付着膜面に
界面活性剤を接触させて膜面洗浄を行なう等の提案が行
なわれているが未だ満足する結果は得られていない。In order to eliminate such inconveniences, proposals have been made to clean the membrane surface by bringing a surfactant into contact with the surface of the membrane to which contaminants have adhered, but satisfactory results have not yet been obtained.
本発明はこのような従来技術の欠点を解決するためにな
されたものであって、アニオン系電着塗料含有液の膜分
離処理に使用した透過膜に付着している汚染物を除去す
るに当り、該汚染膜に、水1〔)0重量部、水と相溶す
る有機溶剤少なくともIAnt部、アミノアルコール少
なくとも1重量部よりなる混合液を接触させることによ
−2て膜汚染物を効果的に除去することができる方法を
提供するものである。The present invention has been made to solve the drawbacks of the prior art, and is a method for removing contaminants adhering to a permeable membrane used for membrane separation of a liquid containing anionic electrodeposition paint. , by contacting the contaminated membrane with a mixed solution consisting of 1[0 parts by weight of water, at least 1 part by weight of an organic solvent compatible with water, and at least 1 part by weight of an amino alcohol, the membrane contaminants are effectively removed. The present invention provides a method that can remove these substances.
本発明における有機溶剤としては、水と相溶すると共に
電着塗料固形分を溶解しつるもので且つ透過膜を溶解し
ないものが用いられ、例えばプロピルアルコール、メタ
ノール、エタノール、メチルセロソルブ、エチルセロソ
ルブ、ブチルセロソルブ、酢酸セロソルブアセトン等を
挙げることができ、好ましくはブチルセロソルブ及び/
又はイソプロピルアルコールが用いられる。The organic solvent used in the present invention is one that is compatible with water, dissolves the solid content of the electrodeposition paint, and does not dissolve the permeable membrane, such as propyl alcohol, methanol, ethanol, methyl cellosolve, ethyl cellosolve, Examples include butyl cellosolve, acetic acid cellosolve, acetone, etc., butyl cellosolve and/or acetone are preferred.
Or isopropyl alcohol is used.
上記有機溶剤は、水100重量部当り少なくとも1重量
部必要であり、通常1〜20重量部が用いられる5有機
溶剤が11i量部以下の場合には膜汚染物の除去効果が
十分ではないからである。The above-mentioned organic solvent is required to be used in an amount of at least 1 part by weight per 100 parts by weight of water, and normally 1 to 20 parts by weight is used.If the amount of the organic solvent is less than 11 parts by weight, the removal effect of membrane contaminants will not be sufficient. It is.
本発明において用いるアミノアルコールは、素数1〜5
の脂肪族炭化水素基、 R’、 R“はH又は炭素数
1〜4のアルキル基、n、mは1〜3の正の整数を示す
。)で表されるものであり、例えばジメチル−1ミノエ
タノール、2−アミノエタノール、37ミノブロパノー
ル、2−アミノブタン−3−オール、2−アミノベンタ
ンー4−オール、3−ノナルアミノプロパン−2−オー
ル、2−メチルアミノ−2−メチルペンタノール等を挙
げることができるが、好ましくはジメチルアミノエタノ
ールが用いられる。上記アミノアルコールは、水100
重量部当り少なくとも1重量部、通常1〜20改量部が
実用的に用いられる。The amino alcohol used in the present invention has a prime number of 1 to 5.
is an aliphatic hydrocarbon group, R', R'' is H or an alkyl group having 1 to 4 carbon atoms, n and m are positive integers of 1 to 3), such as dimethyl- 1minoethanol, 2-aminoethanol, 37minopropanol, 2-aminobutan-3-ol, 2-aminobentan-4-ol, 3-nonalaminopropan-2-ol, 2-methylamino-2-methylpentanol, etc. However, dimethylaminoethanol is preferably used.The above amino alcohol is
At least 1 part by weight, usually 1 to 20 parts by weight, is practically used.
本発明は上述の有機溶剤、アミノアルコール及び水から
なる混合液を汚染膜に接触させることによって膜汚染物
を除去するものであり、さらに本発明において工業上好
ましい使用態様は、アニオン系電着塗料含有液を膜分離
処理して得られた透過液に有機溶剤とアミノアルコール
を加えて汚染膜に接触させる方法である。何故ならばア
ニオン系電着塗料含有液を膜分離処理して得られる透過
液はブチルセロソルブやイソプロピルアルコールなどの
有機溶剤を少量ではあるが含有しているからである。The present invention removes membrane contaminants by bringing the above-mentioned mixed solution consisting of an organic solvent, an amino alcohol, and water into contact with a contaminated membrane, and furthermore, an industrially preferred mode of use in the present invention is anionic electrocoating paint. This is a method in which an organic solvent and an amino alcohol are added to the permeate obtained by membrane separation of the contained liquid, and the mixture is brought into contact with a contaminated membrane. This is because the permeate obtained by membrane separation of a liquid containing anionic electrodeposition paint contains a small amount of an organic solvent such as butyl cellosolve or isopropyl alcohol.
以上に述べた如く本発明によれば、水、有機溶剤及びア
ミノアルコールからなる混合液を汚染膜に接触させるこ
とによって膜汚染物を除去するものであるから、膜素材
や電着塗装工程にも何ら影響を及ぼすことなく、汚染物
によ−2て低下した膜性能を高度に回復させることがで
きる。As described above, according to the present invention, membrane contaminants are removed by bringing a mixed solution consisting of water, an organic solvent, and an amino alcohol into contact with the contaminated membrane. Membrane performance degraded by -2 due to contaminants can be recovered to a high degree without any adverse effects.
以下、本発明を実施例及び比較例を用いて具体的に説明
する。Hereinafter, the present invention will be specifically explained using Examples and Comparative Examples.
実施例1
電着塗料回収システムにおいて、管状モジーールとして
1日東電工社製限外f過モジーールNTU−2020−
M4(1(面積0.39 ’77k、分画分子蓋200
00)を80本使用して、アニオン系電着塗料含有液と
してオイル変性アルキッド樹脂含有液(固形分10重量
%)を圧力5kg/c#/、液温30℃の条件下で半年
間膜分離処理した。仁のとき得られた透過水量は初期(
最初の1日間)では16 外tnであ−7たが、半年間
処理後は10’/minであり、初期の63%まで低下
していた。Example 1 In an electrocoating paint recovery system, as a tubular module, ultra-f ultra-module NTU-2020- manufactured by Tokyo Denko Corporation was used.
M4 (1 (area 0.39'77k, fractionated molecule lid 200
Using 80 bottles of 00), an oil-modified alkyd resin-containing liquid (solid content 10% by weight) was membrane-separated for half a year at a pressure of 5 kg/c#/ and a liquid temperature of 30°C as an anionic electrodeposition paint-containing liquid. Processed. The amount of permeated water obtained at the time of keratin was at the initial stage (
During the first day), it was 16 tn and -7, but after half a year of treatment it was 10'/min, which was 63% of the initial rate.
この状態の透過膜を洗浄するために、得られた透過液中
にブチルセロソルブ及びジメチルアミノエタノールをそ
れぞれの濃度が15重量%になるように添加して、その
液を圧力4に9/Qwtの条件下で1時間循環させて膜
洗浄を行な−、たとζろ、透過水量回復率は971とな
夛膜性能は良好に回復した。In order to wash the permeable membrane in this state, butyl cellosolve and dimethylaminoethanol were added to the obtained permeate so that the concentration of each was 15% by weight, and the liquid was mixed under the conditions of pressure 4 and 9/Qwt. The membrane was cleaned by circulating the membrane for 1 hour, and the permeated water recovery rate was 971, indicating that the membrane performance was well recovered.
なお、透過水量回復率とは次式で定義した〇実施例2
実カ靭例1における洗浄前の汚染膜を、透過液中のブチ
ルセロソルブ濃度を10重量%及びジメチルアミンエタ
ノール濃度を10重tSとした以外は実施例1と同様に
して膜洗浄したところ、透過水量回復率は92チであ−
、た〇
実施例3
実施例1に2ける洗浄前の汚染膜を、透過液中のブチル
セロソルブ濃度を5重量%及びジメチルアミンエタノー
ル濃度を5重量%とした以外は実施例1と同様にして、
膜洗浄したところ、透過水量回復率は80チであ−、た
。The permeated water recovery rate is defined by the following formula. When the membrane was cleaned in the same manner as in Example 1 except for the above, the permeated water recovery rate was 92 cm.
, 〇 Example 3 The contaminated membrane before cleaning in Example 1 was prepared in the same manner as in Example 1, except that the concentration of butyl cellosolve in the permeate was 5% by weight and the concentration of dimethylamine ethanol was 5% by weight.
When the membrane was washed, the permeate water recovery rate was 80 cm.
比較例1
実施例1における洗浄前の汚染膜を、透過液中にブチル
セロソルブを添加せずかつジメチルアミンエタノール濃
度を10重量%とした以外は実施例1と同様にして膜洗
浄したところ、透過水量回復率は72チであ−、た。Comparative Example 1 The contaminated membrane before cleaning in Example 1 was cleaned in the same manner as in Example 1 except that butyl cellosolve was not added to the permeate and the dimethylamine ethanol concentration was 10% by weight. The recovery rate was 72.
比較例2
実施例1における洗浄前の汚染膜を、透過液中にジメチ
ルアミノエタノールを添加せずかつブチルセロソルブ濃
度をlO重f%とした以外は実施例1と同様にして膜洗
浄したところ、透過水量回復率は70%であ−、た〇
特許出願人
日東電気工業株式会社
代表者土方三部Comparative Example 2 The contaminated membrane in Example 1 before cleaning was washed in the same manner as in Example 1 except that dimethylaminoethanol was not added to the permeate and the butyl cellosolve concentration was 1O w/f%. The water recovery rate is 70%, and the patent applicant: Nitto Electric Industry Co., Ltd.
Claims (1)
膜に付着している汚染物を除去するに当り、該汚染膜に
、水100重量部、水と相溶する有機溶剤少なくとも1
重量部、アミノアルコール少なくとも1重量部よりなる
混合液を接触させることを特徴とする膜汚染物除去方法
0When removing contaminants adhering to a permeable membrane used for membrane separation treatment of a solution containing anionic electrodeposition paint, add 100 parts by weight of water and at least 1 part of an organic solvent compatible with water to the contaminated membrane.
Membrane contaminant removal method 0 characterized by contacting a mixed solution consisting of at least 1 part by weight and amino alcohol at least 1 part by weight.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5442482A JPS58170502A (en) | 1982-03-31 | 1982-03-31 | Removal of contaminant of membrane |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5442482A JPS58170502A (en) | 1982-03-31 | 1982-03-31 | Removal of contaminant of membrane |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS58170502A true JPS58170502A (en) | 1983-10-07 |
Family
ID=12970324
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5442482A Pending JPS58170502A (en) | 1982-03-31 | 1982-03-31 | Removal of contaminant of membrane |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS58170502A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60220108A (en) * | 1984-04-17 | 1985-11-02 | Asahi Chem Ind Co Ltd | Washing method of ultrafiltration membrane |
JP2007170817A (en) * | 2005-12-19 | 2007-07-05 | Chugoku Electric Power Co Inc:The | Measuring apparatus and measuring method |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5551406A (en) * | 1978-10-12 | 1980-04-15 | Ebara Infilco Co Ltd | Removal of contaminant of membrane |
JPS56113303A (en) * | 1980-02-13 | 1981-09-07 | Nitto Electric Ind Co Ltd | Removal of contaminant on membrane |
-
1982
- 1982-03-31 JP JP5442482A patent/JPS58170502A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5551406A (en) * | 1978-10-12 | 1980-04-15 | Ebara Infilco Co Ltd | Removal of contaminant of membrane |
JPS56113303A (en) * | 1980-02-13 | 1981-09-07 | Nitto Electric Ind Co Ltd | Removal of contaminant on membrane |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60220108A (en) * | 1984-04-17 | 1985-11-02 | Asahi Chem Ind Co Ltd | Washing method of ultrafiltration membrane |
JP2007170817A (en) * | 2005-12-19 | 2007-07-05 | Chugoku Electric Power Co Inc:The | Measuring apparatus and measuring method |
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