JPH0615018B2 - Emulsion separation method - Google Patents
Emulsion separation methodInfo
- Publication number
- JPH0615018B2 JPH0615018B2 JP60116802A JP11680285A JPH0615018B2 JP H0615018 B2 JPH0615018 B2 JP H0615018B2 JP 60116802 A JP60116802 A JP 60116802A JP 11680285 A JP11680285 A JP 11680285A JP H0615018 B2 JPH0615018 B2 JP H0615018B2
- Authority
- JP
- Japan
- Prior art keywords
- emulsion
- surfactant
- membrane
- dispersion
- polymer porous
- 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.)
- Expired - Lifetime
Links
- 239000000839 emulsion Substances 0.000 title claims description 37
- 238000000926 separation method Methods 0.000 title description 13
- 239000012528 membrane Substances 0.000 claims description 27
- 238000000034 method Methods 0.000 claims description 17
- 239000002612 dispersion medium Substances 0.000 claims description 14
- 239000011148 porous material Substances 0.000 claims description 13
- 229920000642 polymer Polymers 0.000 claims description 12
- 239000004094 surface-active agent Substances 0.000 claims description 12
- 239000002736 nonionic surfactant Substances 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 description 12
- 239000002245 particle Substances 0.000 description 12
- 239000006185 dispersion Substances 0.000 description 9
- 230000005484 gravity Effects 0.000 description 5
- 230000002209 hydrophobic effect Effects 0.000 description 5
- 239000012466 permeate Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- YEVQZPWSVWZAOB-UHFFFAOYSA-N 2-(bromomethyl)-1-iodo-4-(trifluoromethyl)benzene Chemical compound FC(F)(F)C1=CC=C(I)C(CBr)=C1 YEVQZPWSVWZAOB-UHFFFAOYSA-N 0.000 description 4
- 239000000701 coagulant Substances 0.000 description 4
- 238000005315 distribution function Methods 0.000 description 4
- 229920001477 hydrophilic polymer Polymers 0.000 description 4
- -1 polyethylene Polymers 0.000 description 4
- XOJVVFBFDXDTEG-UHFFFAOYSA-N pristane Chemical compound CC(C)CCCC(C)CCCC(C)CCCC(C)C XOJVVFBFDXDTEG-UHFFFAOYSA-N 0.000 description 4
- ZORQXIQZAOLNGE-UHFFFAOYSA-N 1,1-difluorocyclohexane Chemical compound FC1(F)CCCCC1 ZORQXIQZAOLNGE-UHFFFAOYSA-N 0.000 description 3
- 239000011259 mixed solution Substances 0.000 description 3
- 239000001593 sorbitan monooleate Substances 0.000 description 3
- 229940035049 sorbitan monooleate Drugs 0.000 description 3
- 235000011069 sorbitan monooleate Nutrition 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 230000005653 Brownian motion process Effects 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 2
- 238000005537 brownian motion Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920001600 hydrophobic polymer Polymers 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 239000002033 PVDF binder Substances 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 230000004931 aggregating effect Effects 0.000 description 1
- 238000000149 argon plasma sintering Methods 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000000635 electron micrograph Methods 0.000 description 1
- 238000001493 electron microscopy Methods 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 239000012510 hollow fiber Substances 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 239000002563 ionic surfactant Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920002492 poly(sulfone) Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 239000004627 regenerated cellulose Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- 238000000790 scattering method Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、エマルジョンの分離方法に関する。更に詳し
くはエマルジョンの分散液滴と分散媒との界面張力の差
を利用し、高分子多孔膜でろ過することにより分離する
方法に関するものである。TECHNICAL FIELD The present invention relates to a method for separating an emulsion. More specifically, the present invention relates to a method of separating by performing filtration through a polymer porous membrane by utilizing the difference in interfacial tension between dispersed droplets of emulsion and dispersion medium.
〔従来の技術〕 エマルジョンが工業的に利用される反面、エマルジョン
を破壊し、これを分離する操作が必要な場合がしばしば
ある。特に産業廃水処理の立場からはこの問題が重要で
ある。このため、従来は分散液滴と分散媒との比重差を
利用した浮上または沈降による分離、凝集剤等の添加に
より分散液滴の凝集を利用した分離及び吸着による分散
等の分離方法が知られている。[Prior Art] While emulsions are used industrially, it is often necessary to break the emulsions and separate them. This problem is particularly important from the viewpoint of industrial wastewater treatment. Therefore, conventionally, separation methods such as separation by flotation or sedimentation utilizing the difference in specific gravity between dispersed droplets and dispersion medium, separation utilizing aggregation of dispersed droplets by addition of a coagulant, and dispersion by adsorption are known. ing.
分散液滴と分散媒との比重差を利用する方法は長時間を
要し、これを解決するため遠心分離も行われている。し
かし、これら比重差を利用する方法は、比重差が小さい
場合には分離に長時間を要し、装置も大型となり、且つ
分離が完全でない等の欠点を有している。また、エマル
ジョン粒子径が小さくなると、ブラウン運動により、エ
マルジョン粒子の比重差による分離が不可能となる。ま
た、凝集剤等の添加により分散液滴の凝集を利用した分
離では、この操作のみでは分離できず、遠心分離等の処
理を更に必要とする。更に、添加する凝集剤の種類、添
加量によって逆に安定剤として作用する場合もあり、凝
集剤の選択が困難である等の問題がある。さらに吸着に
よる分離では、吸着剤の表面がたちまち飽和されて吸着
機能を失うことなどから、大量の処理に適さない等の問
題がある。The method of utilizing the difference in specific gravity between the dispersed droplets and the dispersion medium requires a long time, and centrifuging is also performed to solve this. However, these methods using the difference in specific gravity have the drawbacks that the separation takes a long time when the difference in specific gravity is small, the apparatus becomes large, and the separation is not perfect. Also, when the emulsion particle size becomes smaller, the Brownian motion makes it impossible to separate the emulsion particles due to the difference in specific gravity. Further, in the separation utilizing the aggregation of the dispersed droplets by adding the aggregating agent or the like, the separation cannot be performed only by this operation, and a treatment such as centrifugation is further required. Further, depending on the type and amount of the coagulant to be added, the coagulant may act as a stabilizer on the contrary, and there is a problem that it is difficult to select the coagulant. Furthermore, the separation by adsorption has a problem that it is not suitable for a large amount of treatment because the surface of the adsorbent is saturated immediately and loses its adsorption function.
本発明者らは、かかる状況下に単一操作で充分な分離性
があり、大量の処理にも適したエマルジョンの分離技術
を実現すべく、分散液滴と分散媒との界面張力に着眼
し、鋭意検討した結果、この目的を充分に達成し得る本
発明に到達したものである。Under the circumstances, the present inventors have focused on the interfacial tension between the dispersed liquid droplets and the dispersion medium in order to realize an emulsion separation technology that has sufficient separability in a single operation and is suitable for large-scale processing. As a result of intensive studies, the inventors have reached the present invention capable of sufficiently achieving this object.
本発明は、界面活性剤を用いて得られたエマルジョンの
分離において、該エマルジョンを高分子多孔膜でろ過す
ることにより、分散液適を分離することを特徴とするエ
マルジョンの分離方法である。更に詳しくは、ＨＬＢ価
が６以下の非イオン性界面活性剤を用いて得られる直径
０．０４〜１０μｍの分散液滴を有するＷ／Ｏ型エマル
ジョンを、該液滴の直径の５０倍以下で０．０２μｍ以
上の平均孔径を持つ高分子多孔膜でろ過することによ
り、分散液滴と、界面活性剤を含む分散媒とを分離する
ことを特徴とするエマルジョンの分離方法である。The present invention is a method for separating an emulsion, characterized in that in the separation of the emulsion obtained by using a surfactant, the emulsion is filtered through a polymer porous membrane to separate the dispersion. More specifically, a W / O emulsion having dispersed droplets having a diameter of 0.04 to 10 μm obtained by using a nonionic surfactant having an HLB value of 6 or less is prepared at 50 times or less the diameter of the droplet. A method for separating an emulsion, characterized in that a dispersion liquid droplet and a dispersion medium containing a surfactant are separated by filtering with a polymer porous membrane having an average pore size of 0.02 μm or more.
まず、本発明におけるエマルジョンとは、互いに溶解し
ない２種以上の液体が界面活性剤によりある成分の液体
が連続相（分散媒）となり、残りの成分が微細な多数の
液滴（分散液滴）となり分散媒中に分散保持されている
系であり、分散液滴が、０．０４μｍ〜１０μｍの平均
直径を有するものを意味する。First, the emulsion in the present invention means that two or more kinds of liquids which do not dissolve in each other are a surfactant and a liquid of a certain component becomes a continuous phase (dispersion medium), and the remaining components are a large number of fine droplets (dispersion droplets). It means a system in which the dispersion droplet is held in a dispersion medium, and the dispersed droplets have an average diameter of 0.04 μm to 10 μm.
次に本発明における高分子多孔膜とは、エマルジョンの
分散液滴と分散媒とを分離するための膜であり、このよ
うな膜としては、電子顕微鏡法による平均孔径が０．０
２μｍ以上で、重量法による空孔率が４０％以上であ
り、ポリエチレン、ポリプロピレン、ポリフッ化ビニリ
デン、ポリテトラフルオロエチレン、ポリスルホン、ポ
リ塩化ビニル、ポリビニルアルコール、ポリアミド、セ
ルロース等の重合体または共重合体からなる高分子多孔
膜が適している。平均孔径が０．０２μｍ未満では膜の
透過性が小さく、粒子径の５０倍以上ではエマルジョン
が充分分離されない。また、空孔率が４０％未満では充
分な透過性が得られない。かかる高分子多孔膜は公知の
方法、例えば、特開昭５４−１６３８２号に記載の方法
で製造することができる。Next, the polymeric porous film in the present invention is a film for separating dispersed droplets of an emulsion and a dispersion medium, and such a film has an average pore size of 0.0 by electron microscopy.
Polymers or copolymers of polyethylene, polypropylene, polyvinylidene fluoride, polytetrafluoroethylene, polysulfone, polyvinyl chloride, polyvinyl alcohol, polyamide, cellulose, etc., having a porosity of 40% or more by gravimetric method of 2 μm or more. Polymer porous membranes consisting of are suitable. If the average pore size is less than 0.02 μm, the membrane has low permeability, and if it is 50 times the particle size or more, the emulsion is not sufficiently separated. Further, if the porosity is less than 40%, sufficient permeability cannot be obtained. Such a polymer porous membrane can be produced by a known method, for example, the method described in JP-A-54-16382.
また、高分子多孔膜の形態としては、平膜、チューブ
上、中空糸などの任意の形態のものを用いることができ
る。これら高分子多孔膜の膜圧は１０μｍ〜１mm、好ま
しくは１０〜２００μｍであるのが適当である。Further, as the form of the polymer porous film, any form such as a flat film, a tube, a hollow fiber and the like can be used. The membrane pressure of these polymeric porous membranes is suitably 10 μm to 1 mm, preferably 10 to 200 μm.
工業的に多く利用されるエマルジョンは、互いに混合し
ない水系液体と疎水性液体との系からなる。これらのエ
マルジョンは、疎水性液体系が分散液滴となり、水系が
分散媒となるＯ／Ｗ型と、逆に水系が分散液滴となり、
疎水性液体系が分散媒となるＷ／Ｏ型に分けられる。Emulsions that are often used industrially consist of a system of an aqueous liquid and a hydrophobic liquid that are immiscible with each other. In these emulsions, a hydrophobic liquid system becomes dispersed droplets, and an aqueous system becomes a dispersion medium, whereas an aqueous system becomes dispersed droplets.
Hydrophobic liquid systems are classified into W / O type, which is a dispersion medium.
本発明の方法は、ＨＬＢ価が６以下の非イオン系界面活
性剤を用いて得られるＷ／Ｏ型エマルジョンの分離に特
に有用である。The method of the present invention is particularly useful for separating a W / O type emulsion obtained by using a nonionic surfactant having an HLB value of 6 or less.
界面活性剤のＨＬＢ価（Hydrophilic Lipophi-lic Bal
ance）はGriffin,W.C.（J.Soc.Cosmetic chemisti,1（1
949））により非イオン性界面活性剤について提唱さ
れ、その後、Davies(2nd inter.Congress of Surface A
ctivity,1（1957）)）により、すべての界面活性剤につ
いて適用されるようになった。本発明における非イオン
性界面活性剤のＨＬＢ価は、Griffinの方法により決定
するものである。HLB value of surfactant ( Hy drophilic Li pophi-lic B al
ance) is Griffin, WC (J.Soc.Cosmetic chemisti, 1 (1
949)) for nonionic surfactants, and then Davies (2nd inter.Congress of Surface A
ctivity, 1 (1957))) has been applied to all surfactants. The HLB value of the nonionic surfactant in the present invention is determined by the Griffin method.
ＨＬＢ価が６以下である非イオン性界面活性剤は安定な
Ｗ／Ｏ型エマルジョンを生成し、これから得られるＷ／
Ｏ型エマルジョンを疎水性高分子多孔膜でろ過すると、
大部分の界面活性剤を含んだ疎水性液体系の分散媒のみ
が膜を透過する。また、あらかじめ水に濡れた親水性高
分子多孔膜でろ過すると、分散液滴のみが膜を透過し、
透過液は水系の連続相として得られ、界面活性剤と大部
分は親水性高分子多孔膜で阻止されるので、疎水性液体
中に残存せしめることができる。A nonionic surfactant having an HLB value of 6 or less produces a stable W / O type emulsion, and the W / O type emulsion obtained therefrom is
When the O-type emulsion is filtered through a hydrophobic polymer porous membrane,
Only hydrophobic liquid-based dispersion media containing most of the surfactant permeate the membrane. Also, when filtered through a hydrophilic polymer porous membrane that has been wet with water in advance, only dispersed droplets permeate the membrane,
The permeate is obtained as an aqueous continuous phase, and since most of the surfactant and the hydrophilic polymer are blocked by the hydrophilic polymer porous membrane, the permeate can be left in the hydrophobic liquid.
ＨＬＢ価が６を越える非イオン性界面活性剤またはイオ
ン性界面活性剤を用いて得られるＷ／Ｏ型エマルジョン
も、本発明の方法により、分散液滴と分散媒とに分離す
ることはできる、界面活性剤と分散液滴との分離はでき
ない。A W / O type emulsion obtained by using a nonionic surfactant or an ionic surfactant having an HLB value of more than 6 can also be separated into a dispersion droplet and a dispersion medium by the method of the present invention. The surfactant and dispersed droplets cannot be separated.
本発明のエマルジョンの分離方法によれば、エマルジョ
ンを高分子多孔膜でろ過するという単純な操作で分離す
ることができ、且つエマルジョンの種類と界面活性剤の
ＨＬＢ価とにより、分散液滴と、界面活性剤を含む分散
倍の分離を実現することができる。According to the method for separating an emulsion of the present invention, the emulsion can be separated by a simple operation of filtering it with a polymer porous membrane, and depending on the type of emulsion and the HLB value of the surfactant, dispersed droplets can be obtained. It is possible to realize a dispersion-type separation containing a surfactant.
尚、この明細書で言及するエマルジョン分散粒子系およ
ぶ高分子多孔膜の平均粒径の測定は次の方法によったも
のである。The average particle size of the emulsion-dispersed particle system and the polymer porous membrane referred to in this specification was measured by the following method.
＜エマルジョン分散粒子径の測定方法＞ エマルジョン分散粒子径の測定は光準弾性散乱法を用い
た。すなわち、ブラウン運動を行う分散粒子を含む溶液
に光を照射すると、粒子からの散乱光周波数はドップラ
ー効果を示す。従って、この光散乱電場の時間的強度変
化を解析することにより、粒子の拡散係数（Ｄ）が求め
られる（例えば、D.E.Koppe，J.chem phys 57,4814（19
72））。そして、この拡散係数からアインシュタイン−
ストークスの式：Ｄ＝ｋＴ／３πηｒを用い、平均粒子
径を算出した。<Emulsion Dispersion Particle Diameter Measurement Method> The emulsion dispersion particle diameter was measured by a light quasi-elastic scattering method. That is, when light is irradiated to a solution containing dispersed particles that undergo Brownian motion, the frequency of scattered light from the particles exhibits a Doppler effect. Therefore, the diffusion coefficient (D) of the particle can be obtained by analyzing the temporal intensity change of the light scattering electric field (for example, DEKoppe, J. chem phys 57 , 4814 (19).
72)). And from this diffusion coefficient, Einstein-
The average particle diameter was calculated using the Stokes' equation: D = kT / 3πηr.
ここで、ｋ，Ｔ，η，ｒはそれぞれボルツマン定数、エ
マルジョンの絶対温度、粘性係数、粒子直径を表す。Here, k, T, η, and r represent the Boltzmann constant, the absolute temperature of the emulsion, the viscosity coefficient, and the particle diameter, respectively.
＜高分子多孔膜の平均孔形の測定方法＞ 多孔膜１cm2当たりの孔半径がｒ〜ｒ＋ｄｒに存在する
孔の数をN(r)drと表示すると(N(r)は孔径分布関数）、
ｉ次の平均孔半径 は(1) 与えられる。<Measurement Method of Average Pore Shape of Polymeric Porous Membrane> When the number of pores existing in a pore radius of r to r + dr per cm 2 of the porous membrane is expressed as N (r) dr (N (r) is a pore size distribution function) ,
The average pore radius of order i is given by (1).
高分子多孔膜の表面の電子顕微鏡写真を走査型電子顕微
鏡を用いて撮影する。該写真から公知の方法で孔径分布
関数N(r)を算出し、これを(1) 式に代入する。すなわ
ち、走査型電子顕微鏡写真を適当な大きさ（たとえば２
０cm×２０cm）に拡大して焼付けし、得られた写真上に
等間隔にテストライン（直線）を２０本描く。各々のテ
ストラインは多数の孔を横切る。孔を横切った際の孔内
に存在するテストラインの長さを測定し、この頻度分布
関数を求める。この頻度分布関数を用いて、例えばステ
レオロジ（例えば、諏訪紀夫著”定量形態学”岩波書
店）の方法でN(r)を定める。なお、平均孔径は２ である。 An electron micrograph of the surface of the polymer porous film is taken using a scanning electron microscope. The pore size distribution function N (r) is calculated from the photograph by a known method, and this is substituted into the equation (1). That is, the scanning electron micrograph is appropriately sized (for example, 2
It is enlarged to 0 cm x 20 cm and baked, and 20 test lines (straight lines) are drawn on the obtained photograph at equal intervals. Each test line crosses multiple holes. The length of the test line existing in the hole when the hole is traversed is measured, and this frequency distribution function is obtained. Using this frequency distribution function, N (r) is determined by, for example, the method of stereology (for example, Norio Suwa "Quantitative Morphology" Iwanami Shoten). The average pore size is 2 Is.
以下、実施例により本発明を更に詳細に説明するが、本
発明は下記の実施例により何ら制限されるものではな
い。Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited to the following Examples.
実施例１ リン酸トリオクチルと２，６，１０，１４−テトラメチ
ルペンタデカンとの混合液（２：１重量比）１００ml
と、これを互いに混じり合わない水１００mlとを、ＨＬ
Ｂ価が４．３の非イオン性界面活性剤であるソルビタン
モノオレエート０．２ｇを用いてＷ／Ｏ型エマルジョン
を調整した。このエマルジョンを室温下に４８時間静置
しても２相に分離することなく、外観上の変化はみられ
なかった。Example 1 100 ml of a mixed solution of trioctyl phosphate and 2,6,10,14-tetramethylpentadecane (2: 1 weight ratio)
And 100 ml of water that does not mix with each other, HL
A W / O emulsion was prepared using 0.2 g of sorbitan monooleate, which is a nonionic surfactant having a B value of 4.3. Even when this emulsion was allowed to stand at room temperature for 48 hours, it did not separate into two phases and no change in appearance was observed.
このエマルジョンを撹拌しながら、あらかじめ水で湿潤
した親水性高分子多孔膜である再生セルロース膜（東洋
ろ紙（株）製ＴＭ３００Ｐ、公称平均孔径３μｍ）でろ
過したところ分散媒である水が１００Kg／m2・ｈｒの流
速で膜を透過した。分散液滴であるリン酸トリオクチル
／２，６，１０，１４−テトラメチルペンタデカン混合
液は膜を透過せず、連続相を形成し、残存した。この
時、水柱のソルビタンモノオレエートは０．０１ｇ以下
であった。This emulsion was filtered with a regenerated cellulose membrane (TM300P manufactured by Toyo Roshi Kaisha, Ltd., nominal average pore diameter 3 μm), which is a hydrophilic polymer porous membrane that was previously wet with water, while stirring, and the dispersion medium water was 100 kg / m 2. It permeated through the membrane at a flow rate of 2 · hr. The mixed liquid of trioctyl phosphate / 2,6,10,14-tetramethylpentadecane, which is a dispersed droplet, did not permeate through the membrane and formed a continuous phase and remained. At this time, the amount of sorbitan monooleate in the water column was 0.01 g or less.
実施例２ 実施例１で得たＷ／Ｏ型エマルジョンを、疎水性高分子
多孔膜であるポリテトラフルオロエチレン膜（住友電工
（株）製フロロポア、公称平均孔径２μｍ）でろ過した
ところ、分散液滴であるリン酸トリオクチル／２，６，
１０，１４−テトラメチルペンタデカン混合液のみが、
３５Kg／m2・ｈｒの流速で膜を透過し、連続相として得
られた。膜を透過したリン酸トリオクチル／２，６，１
０，１４−テトメチルペンタデカン混合液中のソルビタ
ンモノオレートは０．０１ｇ以下であった。Example 2 The W / O type emulsion obtained in Example 1 was filtered through a polytetrafluoroethylene membrane which is a hydrophobic polymer porous membrane (Fluoropore manufactured by Sumitomo Electric Co., Ltd., nominal average pore diameter 2 μm) to obtain a dispersion liquid. Trioctyl phosphate / 2,6, which is a drop
Only the 10,14-tetramethylpentadecane mixed solution
It was permeated through the membrane at a flow rate of 35 kg / m 2 · hr and was obtained as a continuous phase. Trioctyl phosphate / 2,6,1 permeated through the membrane
The amount of sorbitan monooleate in the 0,14-tetomethylpentadecane mixed solution was 0.01 g or less.
このような高分子多孔膜によるエマルジョンの分離方法
によれば、単一の操作で迅速にエマルジョンを分離する
ことができ、且つ分散液滴と界面活性剤の分離も同時に
行うことができる。According to such an emulsion separation method using a polymer porous membrane, the emulsion can be rapidly separated by a single operation, and the dispersed droplets and the surfactant can be separated at the same time.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭59−22603（ＪＰ，Ａ) 特開 昭55−79011（ＪＰ，Ａ) 特開 昭55−15625（ＪＰ，Ａ) 特開 昭54−164061（ＪＰ，Ａ) 特開 昭54−163904（ＪＰ，Ａ) 特開 昭54−125187（ＪＰ，Ａ) 特開 昭54−94167（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-59-22603 (JP, A) JP-A-55-79011 (JP, A) JP-A-55-15625 (JP, A) JP-A-54- 164061 (JP, A) JP 54-163904 (JP, A) JP 54-125187 (JP, A) JP 54-94167 (JP, A)
Claims (1)
を用いて得られる直径０．０４〜１０μｍの分散液滴を
有するＷ／Ｏ型エマルジョンを、該液滴の直径の５０倍
以下で０．０２μｍ以上の平均孔径を持つ高分子多孔膜
でろ過することにより、分散液滴と、界面活性剤を含む
分散媒とを分離することを特徴とするエマルジョンの分
離方法。1. A W / O emulsion having dispersed droplets with a diameter of 0.04 to 10 μm obtained by using a nonionic surfactant having an HLB value of 6 or less is 50 times or less the diameter of the droplets. The method for separating an emulsion is characterized in that the dispersed droplets and the dispersion medium containing a surfactant are separated by filtering with a polymer porous membrane having an average pore size of 0.02 μm or more.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60116802A JPH0615018B2 (en) | 1985-05-31 | 1985-05-31 | Emulsion separation method |
| US06/842,838 US4717480A (en) | 1985-05-31 | 1986-03-24 | Method for separation of liquid mixture |
| DE19863618121 DE3618121A1 (en) | 1985-05-31 | 1986-05-30 | METHOD FOR SEPARATING LIQUID MIXTURES |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60116802A JPH0615018B2 (en) | 1985-05-31 | 1985-05-31 | Emulsion separation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61274708A JPS61274708A (en) | 1986-12-04 |
| JPH0615018B2 true JPH0615018B2 (en) | 1994-03-02 |
Family
ID=14696025
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60116802A Expired - Lifetime JPH0615018B2 (en) | 1985-05-31 | 1985-05-31 | Emulsion separation method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0615018B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7595022B2 (en) * | 2019-10-25 | 2024-12-05 | 株式会社カネカ | Method for producing aqueous polymer dispersion |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5579011A (en) * | 1978-12-13 | 1980-06-14 | Asahi Chem Ind Co Ltd | Separation of oil emulsion |
| JPS5494167A (en) * | 1978-01-10 | 1979-07-25 | Asahi Chem Ind Co Ltd | Oil separation method |
| JPS54125187A (en) * | 1978-03-24 | 1979-09-28 | Asahi Chem Ind Co Ltd | Membrane separating method for oil-containing treating liquid |
| JPS54163904A (en) * | 1978-06-13 | 1979-12-27 | Asahi Chemical Ind | Oil treating method |
| JPS54164061A (en) * | 1978-06-13 | 1979-12-27 | Asahi Chemical Ind | Method of treating oillcontained waste liquid |
| JPS5515625A (en) * | 1978-07-20 | 1980-02-02 | Asahi Chem Ind Co Ltd | Emulsion treating method |
| JPS5922603A (en) * | 1982-07-27 | 1984-02-04 | Kanegafuchi Chem Ind Co Ltd | Method and device for separating two phase mixed liquid |
-
1985
- 1985-05-31 JP JP60116802A patent/JPH0615018B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61274708A (en) | 1986-12-04 |
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