JP2007064815A - Tool for detecting and/or recovering oils - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tool useful for determining (i.e. detecting oils) the presence of petroleum leaked from an underground buried tank in a factory, an oil tank yard, a gas station or the like, and piping or the like therefrom, oils exuded into a well drilled for soil examination or the like, or contaminated oil or the like exuded together with underground water, and/or useful for recovering the oils. <P>SOLUTION: In this tool for detecting and/or recovering oils, (B) at least one part of a film-like material wherein a time until a water drop starts absorption into the film-like material when 0.5 ml of water is dropped on the film-like material by a syringe is 15 seconds or more, and wherein a time until an oil drop starts absorption into the film-like material when 0.5 ml of oil is dropped on the film-like material by the syringe is 5 seconds or less, is joined to (A) at least one end of (a) a porous bag-like body storing an oil absorbing material in its inside, or (b) woven cloth or unwoven cloth comprising a lipophilic synthetic resin. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention has the presence or absence of oil leaked from underground buried tanks such as factories, oil tanks, and gas stations, and pipes from the tanks, oil leached into wells bored in soil surveys, etc., or contaminated oil leached together with groundwater. The present invention relates to a tool useful for determination (ie, detection of oils) and / or recovery.

In facilities with underground tanks such as factories, oil depots, and gas stations, it is required by law to conduct periodic inspections in order to quickly detect oil leaks from underground tanks. As countermeasures, groundwater in the pipe or well is collected in a suitable container or collected and checked with a tube connected to a suction pump, or a leak detection bar is inserted into the pipe or well and the detection bar is inserted. A method of visually confirming was performed.
In some cases, a measuring scale used to measure the amount of gasoline remaining in the tank, etc. was applied, and an oil paste (Sankyo Chemical) was applied thereto, and the presence or absence of leaking oil was determined by discoloration of the oil paste. As another method, a method of detecting gas in a detection tube is also known (see JIS K01028, JIS K010210.1, EPA 4030, EPA 4035, etc.).

  In the conventional method of collecting leaked oil from the detection tube or well (main purpose is to collect the amount necessary for analysis), if there is enough leaked oil, it can be easily detected, but the initial leak Thus, when the amount of oil is small, the determination is difficult, and particularly when visual determination is difficult, analysis using an analytical instrument is necessary. On the other hand, the current situation is that the detection rods and measuring scales are used less frequently with the maintenance of instruments. In addition, the oil paste develops a red color as time passes after application, and sometimes it is difficult to determine whether or not the leaked oil has adhered and developed. In the case of gas detection, in order to be accurate, it must be collected in a collection bag, and gas detection is not simple. When leaked oil is leaching into groundwater, a method of collecting it at the same time as groundwater is taken, but it is part of the conditions that can detect the presence of groundwater, and any of these methods is the presence of leaked oil. It's hard to say that it's a good way to quickly determine.

  As a technique for detecting oil leakage from large tanks, containers, pipes, joints thereof, etc., in Patent Document 1, (a) volatile solvent, (b) transparent when wet, and opaque when dried. A technique has been proposed in which a leakage inspection agent mainly composed of white inorganic powder and (c) a color pigment is applied to the surface of a test object, and a change in the color tone is checked. A leakage inspection material consisting of a dark colored layer provided thereon and a white layer provided on the colored layer, which becomes transparent when wet and becomes opaque when dried, is applied to the surface of the inspection object, and the change in color tone Patent Document 3 discloses a water-dispersed oil inspection agent containing 0.1 to 5% by weight of an oil-soluble dye having a particle size of 10 μm or less and 5 to 70% by weight of white fine powder. Is applied to the surface of the test object A technique for checking a change in tone has been proposed. In Patent Document 4, oil-soluble dye having a particle size of 10 μm or less is 0.1 to 5% by weight, dispersant is 0.05 to 5% by weight, white fine powder is 5 to 5%. A technique for applying a water-dispersed oil leak detection paint containing 70% by weight and a water-based binder of 0.5 to 50% by weight to an inspection object and checking the change in color tone is disclosed. A technique is disclosed in which a variety of oil leakage detectors are attached to a surface of a test object with a uniform thickness on a flexible sheet material having heat resistance and liquid permeability, and the color tone is checked. Yes. However, these techniques are techniques for checking a change in color tone by bringing a detection agent into contact with an inspection body such as a tank or a pipe, and are not a technical idea for detecting oil leaking underground.

JP-A-10-142166 JP-A-10-185742 Japanese Patent Laid-Open No. 11-030594 Japanese Patent Application Laid-Open No. 11-044604 JP 2001-221705 A

  An object of the present invention is to provide a tool for oil detection and / or recovery, which is an improvement on the invention of Japanese Patent Application No. 2003-30192 filed earlier in order to eliminate the above-mentioned drawbacks.

  The present invention includes (1) (a) at least one end of a porous bag-like material described in JP-A-2005-069944 or (b) a woven or non-woven fabric made of lipophilic synthetic resin, and (2) oil from water. The present invention relates to a tool for detecting and / or collecting oils formed by joining a film-like material that absorbs preferentially.

The first of the present invention is
(A) (A) A porous bag-like material containing an oil-absorbing material therein,
Or
(B) At least one end of a woven or non-woven fabric made of a lipophilic synthetic resin,
(B) When 0.5 ml of water is dropped onto the membrane with a dropper, the time until the water droplets start to be absorbed by the membrane is 15 seconds or longer, and 0.5 ml of oil is put on the membrane. For oil detection and / or characterized by joining at least part of a film-like material in which the time until oil droplets start to be absorbed by the film-like material is 5 seconds or less when dropped with a dropper It relates to a recovery tool.
2. The oil detecting and / or collecting tool according to claim 1, wherein the porous bag-like product is made of a synthetic resin selected from the group consisting of polyolefin, polyamide, polyester and polyurethane. About.
The third of the present invention relates to the oil detection and / or recovery tool according to claim 1, wherein the lipophilic synthetic resin is made of a synthetic resin selected from the group consisting of polyolefin, polyamide, polyester and polyurethane. .
According to a fourth aspect of the present invention, the oil-absorbing material is selected from the group consisting of diatomaceous earth, white clay, charcoal, activated alumina, silica gel, and a mixture thereof. Or it relates to a recovery tool.
A fifth aspect of the present invention relates to the oil detection and / or collection tool according to any one of claims 1 to 4, wherein the membrane (B) is a porous synthetic resin film.
A sixth aspect of the present invention relates to the oil detection and / or collection tool according to any one of claims 1 to 5, wherein the film-like material (B) has a water absorption rate of 0.7% or less according to ASTM D570.
The seventh aspect of the present invention is that the film-like material (B) is composed of a material selected from the group consisting of polypropylene, polytetrafluoroethylene and polyvinylidene chloride. The present invention relates to the oil detection and / or recovery tool.

  The role of (A) is to collect an amount of oil necessary for analysis, and the role of (B) is to immediately identify the presence or absence of oil with the naked eye.

  Examples of the oil-absorbing material in (A) (A) include porous inorganic materials such as diatomaceous earth, white clay (acidic white clay, bentonite, etc.), charcoal (including activated carbon), activated alumina, silica gel, and mixtures thereof, or Examples thereof include wood, which has been carbonized, plant fibers, lipophilic wood, porous organic materials such as artificially produced hollow fibers and mixtures thereof, and mixtures of the inorganic materials and organic materials. The charcoal has a mysterious ability to absorb oil even when wet. Since the porous material retains the absorbed oil in its voids, the absorbed oil is not easily re-released, and when used for analysis, the porous material that has adsorbed the oil is heated to The sample for analysis can be prepared using a method such as desorbing or extracting oil with a solvent. The oil-absorbing material is preferably of a size that is easy to be stored and held in a porous bag-like material such as a granule or a fiber and that is advantageous for absorption.

  As a preferable oil-absorbing material, in addition to the charcoal, a particle group having a particle diameter in the range of 100 μm to 10 mm, preferably 100 μm to 5 mm is 50% by weight or more, preferably 60% by weight or more, more preferably 70% by weight or more, particularly preferably 80% by weight or more, most preferably 90% by weight or more, of which particles having a particle diameter exceeding 3 mm are at least 5% by weight (the total amount of particles falling within the range of 100 μm to 10 mm) ), Preferably 10% by weight, particularly preferably 15% by weight, and those having a particle size of 1 mm or less occupy 35% by weight or less (based on the total amount of particles falling within the range of 100 μm to 10 mm). An oil-absorbing material made of diatomaceous earth particles can be mentioned.

In the present invention, if the particle diameter is in the range of 100 μm to 10 mm, preferably 100 μm to 5 mm, in other words, the particle diameter is 100 μm or more, the liquid to be absorbed can easily flow into the gap between the particles. It was found that the absorption rate was improved. In particular, the particle group falling within this range is 10% or less, preferably 5% or less 100% (where% is based on weight), 3 mm or less 70-90%, 2 mm or less 40-60% It is preferable that it is 15 to 35% of 1 mm or less. With such a distribution, it is presumed that the apparent absorption rate for the liquid to be absorbed becomes very high when particles of various particle sizes coexist. It is presumed that the liquid to be absorbed then gradually penetrates into the pores of the particles from the particle gap. On the other hand, an absorbent material composed only of fine particles of 100 μm or less has a very small particle gap, so that it cannot rapidly penetrate into the particle gap, and as a result, it takes a very long time to penetrate into the individual fine particles. It is considered a thing. Moreover, when the viscosity of the liquid to be absorbed is as high as C heavy oil, it is desirable to contain at least 5% by weight of a liquid having a particle diameter exceeding 3 mm. As a result, the liquid to be absorbed having high viscosity can smoothly penetrate into the particle gap.
Such a tendency, that is, whatever the oil-absorbing material is, since the particle gap is larger when the particle size is at least 100 μm, the absorbed liquid easily penetrates into the particle gap, and apparent It is thought that the absorption rate is improved. In addition, a small particle size such as 100 μm or less is likely to form lumps when in contact with the liquid to be absorbed, but a larger particle diameter is more preferable to form lumps even if the liquid to be absorbed has a high viscosity. Show the trend. This is apparent from reference examples 3 and 4.

  The porous bag-like material in (A) (A) is preferably a nonwoven fabric or a woven fabric, particularly a bag made of a nonwoven fabric. The material constituting these nonwoven fabrics and woven fabrics is preferably a synthetic resin, particularly an oleophilic synthetic resin selected from the group consisting of polyolefin, polyamide, polyester and polyurethane. The size of the porous bag-like material is not particularly limited, but is preferably a size that can be charged into the detection tube in consideration of being charged into the detection tube and inspected. Considering these points, the width is usually 1.5 to 5 cm, the length is 2 to 5 cm, and the thickness (the thickness of the thickest portion when the absorbent material is stored) is 2 to 10 mm.

  The lipophilic synthetic resin in (B) of (A) is preferably the same as the synthetic resin constituting the porous bag-like material in (A) of (A). Preferred are those selected from the group consisting of polyamide, polyester and polyurethane.

  The oil-absorbing material (B) has a time of 15 seconds or longer, preferably 20 seconds or longer, until the water droplets are absorbed by the film-like material when 0.5 ml of water is dropped on the film-like material with a dropper. Particularly preferably, it is 30 seconds or more, and when 0.5 ml of oil is dropped on the membrane with a dropper, the time until the oil droplet starts to be absorbed by the membrane is 5 seconds or less, preferably 3 seconds or less. A film-like material having physical properties of 1 second or less is preferable.

The film-like material (B) is a porous synthetic resin film, a synthetic resin woven fabric or a synthetic resin nonwoven fabric, and the synthetic resin has a water absorption rate of 0.7% or less according to ASTM D570. preferable. Specific examples of preferred synthetic resins include polypropylene, polytetrafluoroethylene, and polyvinylidene chloride.
In addition, the typical thing of the synthetic resin of 0.7% or less of water absorption is as follows.
Resin name Water absorption (%)
Polypropylene <0.01-0.03
Polyethylene <0.015
Polyvinylidene chloride <0.1
Polycarbonate 0.2
Polyethylene terephthalate 0.6

As the film-like material (B), a porous synthetic resin film is particularly preferable. Examples of the porous synthetic resin film include microporous films made of synthetic resin having open cells, for example, polypropylene or polyethylene. The porous synthetic resin film may be white or colored, and it becomes transparent if white using the fact that its light transmittance increases when oil adheres, and the color becomes dark if colored. In other words, the change in the color of the contact portion with oil is more conspicuous than in the case of woven fabric or non-woven fabric, so that the presence of oil can be easily detected visually.
Examples of the synthetic resin microporous film having open cells include a trade name “3M microporous film” manufactured by Sumitomo 3M Limited. This is a polypropylene porous film with countless fine pores with a maximum diameter of 0.3 μm, and the fine pores occupy 35% of the total, and what is marketed as “oiled paper” in the cosmetics market. Can be diverted.

  Examples of the synthetic resin woven fabric or non-woven fabric constituting the membrane (B) are polyester non-woven fabric marketed by Toyobo Co., Ltd. as industrial cartridge air filter “BESTSHOT”, and polyester long fiber manufactured by the same company. Examples include the trade name Ecule, which is a non-woven fabric, and a hydrophobic durapore filter (trade name) manufactured by Millipore (made of polytetrafluoroethylene or polyvinylidene chloride). The water absorption rate of these products is not necessarily the same as the water absorption rate of the resin itself. The reason is that some processing may be performed by the manufacturer. However, the water absorption rate of these products is less than 0.7%.

0.5 ml of water or oil was dropped with a dropper at room temperature on the following materials including 3M microporous film (polypropylene) manufactured by Sumitomo 3M. The time until dripped water or oil begins to be absorbed is shown below. The point at which water or oil begins to be absorbed can be easily identified as the water or oil droplets begin to get smaller, and the difference between the time when water and oil begins to be absorbed is too large, so this judgment is actually Very simple. In addition, although investigated using JIS No. 2 gasoline and JIS No. 2 light oil as oil, since all showed the same result, it expressed as "oil" in the table | surface.

  In claim 1, when 0.5 ml of water is dropped onto the film-like material with a dropper, the time until the water droplets start to be absorbed by the film-like material is 15 seconds or longer, and 0.5 ml of oil is placed on the film-like material. It is a requirement of the film-like material that the time until the oil film begins to be absorbed by the film-like material when the oil is dropped with a dropper is 5 seconds or less. If any of these requirements are not met, the detection capability is reduced, and if the amount of oil is extremely small, the determination may not be possible. This requirement is, in other words, a material that absorbs oil quickly but does not readily absorb water. When this film is placed on the surface of the water for about 5 to 15 seconds and pulled up, the film becomes It can be said that the above-mentioned rule is a guideline for absorbing only the oil. The larger the difference between the water absorption start time and the oil absorption start time, the better the determination can be made without speedily performing the detection operation process.

  In addition, it is preferable to use the synthetic resin having a water absorption rate of 0.7% or less according to the measurement method according to ASTM D570 in a film-like material using such a synthetic resin material. This is because the physical properties defined in claim 1 can be satisfied without any errors.

  The non-woven fabrics and woven fabrics in (A) and (B) above are generally white, but by utilizing the fact that the light transmittance increases when oil adheres, When the woven fabric is combined, the white non-woven fabric or woven fabric reflects the colored portion and can easily determine the presence of the oil visually after contact with the oil. Therefore, the white (A) and the colored (B ) Is preferably used as the oil detection and / or recovery tool of the present invention.

  By applying to the surface (B) of the oil detection and / or recovery tool of the present invention used for oil detection a microcapsule soluble in petroleum solvent and containing a pigment, It is also possible to determine whether there is an oil component such as a petroleum product.

  The oil detection and / or recovery tool of the present invention is attached to the tip of a detection rod, for example, and inserted into a leak detection tube or observation well installed around a petroleum product storage tank at a gas station or the like. Thus, it is possible to detect the oil content of the groundwater surface existing in the water.

(1) The oil detection and / or recovery tool of the present invention shown in the following (A) alone of the present invention is a system that is very short compared to this type of conventional product, for example, within a few seconds. Since the oil content in the inside is absorbed, the detection and recovery operations can be performed quickly and accurately.
(2) The oil detection and / or recovery tool of the present invention can easily absorb and recover the oil that has leached into the detector tube or the borehole for investigation, and even when the oil is present together with the groundwater To do.
(3) The oil adsorbed on the oil detection and / or recovery tool of the present invention does not easily leak outside during the operation for recovery, while the adsorbed oil is not leaked to the oil of the present invention. In order to collect from a kind detection and / or recovery tool, it can be easily achieved by a heating means or a solvent extraction means.
(4) Since the oil adsorbed on the oil detection and / or recovery tool of the present invention has not undergone any chemical changes, the reliability of the data analyzed is high.
However, in the present invention, by using together with the oil-absorbing material that is the film-like material of (B), first, oil penetrates into the oil-absorbing material that is the film-like material of (B), The oil component penetrates into (A) or (B) of (A) and the permeation time is shortened.
In addition, the composition of the recovered oil can be estimated by analyzing the oil recovered by the above (A) by gas chromatography. Therefore, whether the oil leaked by this is gasoline, light oil, or kerosene. You can determine if it exists. Therefore, the tool of the present invention effectively functions as an oil leakage countermeasure for a petroleum product storage tank in a gas station or the like.

Hereinafter, the present invention will be described with reference to examples, but the present invention is not limited thereto.

Reference example 1
The amount of adsorption was measured for Toyobo non-woven fabric (trade name) Best Shot (commercially available for polyester air filter) and various oils used as (B) of the present invention, and the results are shown in Table 2 below.

Reference example 2
Various petroleum products were absorbed in charcoal (flakes of 5 mm or less) as a porous material to the extent that they did not drip, and the amount of adsorption was measured. The results are shown in Table 3 below.

Reference example 3
An absorbent bag [a specific example of (A) in (A) above] was prepared by filling charcoal (in Reference Example 2) into a bag made using Toyobo's non-woven fabric best shot (in Reference Example 1). . The bag made of the non-woven best shot made by Toyobo Co., Ltd. had a size of 9 square cm on one side, and the amount of charcoal in the bag was approximately 0.15 g. Using this, the adsorption ability of various oils suspended in water was measured. Table 4 below shows the amount of absorption in 30 seconds depending on the type of oil suspended in water.

Reference example 4
An absorption bag [specific example of (A) in (A) above] was produced by combining Toyobo non-woven fabric best shot (from Reference Example 1) and charcoal (from Reference Example 2). The Toyobo non-woven fabric best shot used was 18 cm 2 and charcoal was approximately 0.17 g.
Using this, the time required to absorb 0.5 g of various oils suspended in water was measured. The results are shown in Table 5 below.

捕捉回収率はほぼ１００％であった。 Reference Example 5
An absorption bag [specific example of (A) in (A) above] was produced by combining Toyobo non-woven fabric best shot (from Reference Example 1) and charcoal (from Reference Example 2). The Toyobo non-woven fabric best shot used was 18 cm 2 and charcoal was approximately 0.17 g.
When 0.5 ml of gasoline was suspended in 50 ml of water and 0.5 g of light oil was suspended, the amount of absorbed material captured by the absorption bag was measured using a gas chromatogram. The absorption time was 30 seconds. After absorption, the absorber was placed in a glass container that could be sealed, and 10 ml of carbon disulfide was added and extracted with shaking for 2 minutes. The carbon disulfide extract was subjected to gas chromatography and the recovery rate was measured. The results are shown in Table 6 below.

The capture recovery rate was almost 100%.

ガソリンは揮発性が高いので参考例３の油類検出用袋は回収後直ぐに判定して密閉容器に保存する必要がある。
目視判定の＋：灰色の斑点が部分的に確認できる。＋＋：灰色の斑点が全体的にはっきり確認できる。 Reference Example 6
The following test was conducted by determining the visual detection limit value of floating oil.
Gasoline was suspended in a glass container having a diameter of 5 cm in water, and the oil detection bag of Reference Example 3 was suspended and collected there for 5 seconds. At that time, odor was also determined. The results are shown in Table 7 below.

Since gasoline is highly volatile, the oil detection bag of Reference Example 3 needs to be determined immediately after collection and stored in a sealed container.
Visual determination +: Gray spots can be partially confirmed. ++: Gray spots can be clearly confirmed as a whole.

Reference Example 7
The diatomite debris was dried to a moisture content of 10% or less, and then crushed and passed through a 5 mm sieve to prepare an oil-absorbing material. This oil-absorbing material is fractionated with a sieve having different eyes, and the ratio of diatomaceous earth particles that pass through each eye is shown in Table 8 below. % In the table is based on weight.

Table 9 below shows the amount of absorption when various fuel oils were absorbed using 10 g of diatomaceous earth of Reference Example 7.

バイオ忍者（商品名：珪藻土微粉末吸収材７０μｍ以下のもの１００％、３０μｍ以下のもの９０％）、生珪藻土、焼成珪藻土及びモンモリロナイトはいずれも油を吸収してダマとなり、分散させ粉状にするのに時間が掛かり、その上硫酸紙の表面に油と共にこびりついていた。
稚内珪藻土（商品名）は粒子状なのでダマにはなり難いが使用量が多くなる。
ＡＣライト（商品名）は顆粒状（３ｍｍ以下が１００％、２ｍｍ以下が９３％、１ｍｍ以下が０％）であり、Ｃ重油以外は比較的吸収処理がしやすいが、Ｃ重油は団子状になり処理しにくい。完全に油が吸収されずに表面に残るので残油を拭き取らなければならない。
しかも、粒子状や顆粒状にするためには、そのための工程が余分にかかり、コスト高は避けられない。
参考例７のものは吸収が早く、ダマになりにくく、処理時間が短くて済む上、粘性の高いＣ重油、エンジン油でもダマにならないことがわかる。 The amount of the absorbent material according to Reference Example 7 required to completely absorb 1 g of each oil shown in Table 10 was measured.
Complete absorption is the result of repeating the operations of weighing 1.0 g of oil on sulfuric acid paper, adding an absorbent on it, stirring with a cartridge, and adding the absorbent little by little and stirring with the cartridge. The amount of the absorbent used until the surface of the sulfuric acid paper did not leave oil and the absorbent that absorbed the oil did not become lumpy and was not attached to the paper surface was determined. The results are as shown in Table 10 below.

Bio Ninja (trade name: 100% diatomaceous earth powder absorbent material of 70 μm or less, 90% of 30 μm or less), raw diatomaceous earth, calcined diatomaceous earth and montmorillonite all absorb oil, become lumps, disperse and powder. It took a long time and stuck to the surface of the sulfuric acid paper with oil.
Wakkanai diatomaceous earth (trade name) is particulate, so it is difficult to become lumps, but the amount used is large.
AC light (trade name) is granular (3% or less is 100%, 2mm or less is 93%, 1mm or less is 0%), and other than C heavy oil is relatively easy to absorb, but C heavy oil is in a dumpling form. It is difficult to process. Since the oil is not completely absorbed and remains on the surface, the residual oil must be wiped off.
In addition, in order to form particles or granules, an extra process is required, and high costs are inevitable.
It can be seen that the sample of Reference Example 7 absorbs quickly, is less likely to become lumps, requires less processing time, and is not damped even with highly viscous C heavy oil or engine oil.

炭の粒度分布は３〜１０ｍｍ２９％、２〜３ｍｍ６０％、１〜２ｍｍ１０％、１ｍｍ以下１％であった。活性炭Ａの粒度分布は２６０〜５２０μｍで活性炭Ｂの粒度は１００μｍ以下であった。炭は粒径が大きいのみならず細孔も活性炭より粗い部分もあり、その様な部分での粘性のある油分の吸収が吸収速度を速める要因の一つと考えられる。 Reference Example 8
An engine oil of 1.0 g was covered with charcoal and activated carbon as an absorbent material, and the time until the oil was absorbed by the entire absorbent body was measured. Since absorption varies depending on the substance used, the amount absorbed as a whole was taken as the amount used. The results are shown in Table 11 below.

The particle size distribution of charcoal was 3 to 10 mm 29%, 2 to 3 mm 60%, 1 to 2 mm 10%, and 1 mm or less 1%. The particle size distribution of the activated carbon A was 260 to 520 μm, and the particle size of the activated carbon B was 100 μm or less. Charcoal not only has a large particle size, but also has pores and coarser portions than activated carbon. Absorption of viscous oil in such portions is considered to be one of the factors that increase the absorption rate.

  Next, Reference Examples 9 to 17 in which a test of the ability to detect a film-like object was performed are shown.

住友スリーエム社製３Ｍマイクロポーラスフィルムには白色、青色、水色、桃色等各色の製品が製造、市販されており、それらについて検討したが油分の有無の判定の際に大きな差は見られなかった。 Reference Example 9
Table 12 below shows the results of the detected concentrations (indicated by the thickness of the oil film) of the oil content and oil film of 3M microporous film (polypropylene) manufactured by Sumitomo 3M Co. and commercial gasoline on the water surface (JIS No. 2 gasoline).

A 3M microporous film manufactured by Sumitomo 3M Co., Ltd. has been manufactured and marketed in various colors such as white, blue, light blue, and pink, and these were examined, but no significant difference was found when determining the presence or absence of oil.

Reference Example 10
Table 13 below shows the results of the detected concentrations of the oil and oil film of 3M microporous film (polypropylene) manufactured by Sumitomo 3M Limited and commercial kerosene (JIS No. 1 kerosene) on the water surface.

Reference Example 11
Table 14 below shows the results of detection concentrations for oil components and oil films of 3M microporous film (polypropylene) manufactured by Sumitomo 3M Limited and commercial light oil (JIS No. 2 light oil) on the water surface.

Reference Example 12
Table 15 below shows the results of detection concentrations for oil components and oil films of 3M microporous film (polypropylene) manufactured by Sumitomo 3M Co. and commercial A heavy oil (JIS Type 1 No. 1 heavy oil) on the water surface.

Reference Example 13
Detected concentration results for Toyobo's best shot (polyester, basis weight 240 g / m ² , thickness 0.60 mm, fragile air permeability 20 cc / cm ² / s) and the oil content of commercial gasoline on the water surface (JIS No. 2 gasoline) Is shown in Table 16 below.

エクーレには使用材料のｍ^２当たりの重量で複数の製品が存在する。ここで示したのは７０ｇ／ｍ^２のものでそれより軽量でも判定は出来るがやや困難であった。白色と有色（黒色）とでは白色の方が判定はしやすかった。 Reference Example 14
Table 17 below shows the results of detection concentrations for the oil content of Toyobo Ecule (polyester) (white, colored) and commercial gasoline on the water surface (JIS No. 2 gasoline).

Multiple products are present in a weight per m ² of the material used for Ekure. What was shown here was 70 g / m ² , and although it could be judged even lighter than that, it was somewhat difficult. In white and colored (black), white was easier to judge.

Reference Example 15
Table 18 below shows the results of oil content detection concentrations of Hydrolipa Durapore filter product number HVHP01300 (polyvinylidene fluoride pore size 0.45 μm) manufactured by Millipore and commercial gasoline on the water surface (JIS No. 2 gasoline).

Reference Example 16
Table 19 below shows the results of oil content detection concentrations of a hydrophobic Durapore filter manufactured by Millipore Corporation, product number LCWP013000 (polytetrahydrofuran ethylene pore size 10.0 μm) and commercial gasoline on the water surface (JIS No. 2 gasoline).

Reference Example 17
Table 20 shows the results of oil content detection concentrations of a commercially available PTFE filter and a commercially available gasoline (JIS No. 2 gasoline) on the water surface.

Comparative Reference Example 1
Nitrated cellulose filter (Advantech Toyo Co., Ltd., pore size 0.2 μm), glass filter paper (Advantech Toyo Co., Ltd., product number GS25), paraffin paper (Tokyo Nippon Oil Paper Co., Ltd.), hydrophilic 3M Sumitomo 3M Co., Ltd. Porous film, cellulose filter (made by Whatman), paper or oil-repellent paper using plant fiber absorbs water almost instantaneously when it comes in contact with water, making it difficult to judge by increasing transparency and making it impossible to use there were.

本実施例に使用したポリプロピレン製マイクロポーラスフィルム以外にポリエステル不織布でも同様に判定できることを確認した。 Example 1
A product name 3M microporous film (made of polypropylene) manufactured by Sumitomo 3M Co. was thermally bonded to the absorption bag obtained in Reference Example 3. The following test was conducted by determining the visual detection limit value of floating oil.
Gasoline was suspended in a glass container having a diameter of 5 cm in water, and the oil detection bag of the present example was suspended and collected there for 5 seconds. Judgment was based on the fact that the transparency increases when gasoline adheres to the film. Determination with the thickness (oil film) of gasoline suspended in water was as shown in Table 21 below.

It was confirmed that a polyester nonwoven fabric as well as the polypropylene microporous film used in this example could be similarly determined.

Example 2
A porous film (3M microporous film blue) and a non-woven fabric (Toyobo Best Shot) were impulse-adhered to the tip of the detection rod used to inspect the amount of stored oil and leaked oil in the detector tube. The test paper of the present invention (size: 1 cm × 5 cm) was fixed with a metal clip, and the test paper part of the present invention was inserted so as to adhere to the groundwater surface in the detector tube. When the test bar was pulled up and the test paper was checked, it was immediately possible to determine that oil was present near the groundwater surface because the color of the porous film had changed to dark blue. Actually, there was groundwater in the detector tube, and an oil film was found on the water surface. The test paper of the present invention was immediately put into a glass bottle with Teflon (registered trademark) packing, and the lid was tightly closed and sent to the analysis chamber for gas chromatography analysis. By extracting the oil component absorbed in the nonwoven fabric of the test paper of the present invention with an organic solvent and performing gas chromatography analysis, it was determined from the chromatogram pattern that the oil component was gasoline. Therefore, it was speculated that there was a suspicion of gasoline leak in the vicinity of this detector tube, and necessary countermeasures were taken promptly.

Claims (7)

(A) (A) A porous bag-like material containing an oil-absorbing material therein,
Or
(B) At least one end of a woven or non-woven fabric made of a lipophilic synthetic resin,
(B) When 0.5 ml of water is dropped onto the membrane with a dropper, the time until the water droplets start to be absorbed by the membrane is 15 seconds or longer, and 0.5 ml of oil is put on the membrane. For oil detection and / or characterized by joining at least part of a film-like material in which the time until oil droplets start to be absorbed by the film-like material is 5 seconds or less when dropped with a dropper Collection tool.   The oil detection and / or collection tool according to claim 1, wherein the porous bag is made of a synthetic resin selected from the group consisting of polyolefin, polyamide, polyester and polyurethane.   The oil detection and / or recovery tool according to claim 1, wherein the lipophilic synthetic resin is made of a synthetic resin selected from the group consisting of polyolefin, polyamide, polyester and polyurethane.   The oil detection and / or collection tool according to claim 1 or 2, wherein the oil-absorbing material is selected from the group consisting of diatomaceous earth, white clay, charcoal, activated alumina, silica gel, and mixtures thereof.   The oily detection and / or recovery tool according to any one of claims 1 to 4, wherein the membrane (B) is a porous synthetic resin film.   The oil detection and / or recovery tool according to any one of claims 1 to 5, wherein the film-like material (B) has a water absorption rate of 0.7% or less according to ASTM D570. 7. The oil detection material according to claim 1, wherein the film-like material (B) is composed of a material selected from the group consisting of polypropylene, polytetrafluoroethylene and polyvinylidene chloride. / Or recovery tool.