CA1149754A - Method of removing oil or similar liquids from the surface of water or a solid material - Google Patents
Method of removing oil or similar liquids from the surface of water or a solid materialInfo
- Publication number
- CA1149754A CA1149754A CA000352450A CA352450A CA1149754A CA 1149754 A CA1149754 A CA 1149754A CA 000352450 A CA000352450 A CA 000352450A CA 352450 A CA352450 A CA 352450A CA 1149754 A CA1149754 A CA 1149754A
- Authority
- CA
- Canada
- Prior art keywords
- oil
- liquid
- water
- absorbed
- wool
- 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
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B15/00—Cleaning or keeping clear the surface of open water; Apparatus therefor
- E02B15/04—Devices for cleaning or keeping clear the surface of open water from oil or like floating materials by separating or removing these materials
- E02B15/041—Devices for distributing materials, e.g. absorbed or magnetic particles over a surface of open water to remove the oil, with or without means for picking up the treated oil
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/20—Controlling water pollution; Waste water treatment
- Y02A20/204—Keeping clear the surface of open water from oil spills
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Removal Of Floating Material (AREA)
- Lubricants (AREA)
- Water Treatment By Sorption (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
- Physical Water Treatments (AREA)
Abstract
ABSTRACT
The method of removing oil or similar liquids from the surface of water or a solid material comprises absorbing the liquid by means of granulated mineral wool and separating the liquid from the mineral wool material by subjecting it to a centrifugal force or a pressure difference.
The method of removing oil or similar liquids from the surface of water or a solid material comprises absorbing the liquid by means of granulated mineral wool and separating the liquid from the mineral wool material by subjecting it to a centrifugal force or a pressure difference.
Description
75':~
A METHOD OF REMOVING OIL OR SIMILAR LIQUIDS FROM THE SURFACE OF
WATER OR A SOLID MATERIAL.
The present invention relates to a method of removing oil or similar liquids from the surface of water or a solid material, and to its reyeneration.
It is an object of the present invention to provide a new method which, in case of a leak, makes the oil removal possible, especially to a tanker by its own crew; or similar oil prevention actions.
Most of the oil accidents on the water areas happen so that a tanker springs a leak and a limited amount of oil runs into the water. Relatively seldom the leak is so large that whole of the tanker runs empty, although this is really very disastrous. The major part of the oil damages is thus to be prevented, if the tanker itself has been provided with the proper prevention equipment and material and the prevention acts can be started immediately during the first minutes of the accident.
The process of the preventive actions are as follows:
When the oil leak has happened the leakage area is surrounded by e.g. boom nets in order to master the spreading of the oil and in order to be able to carry out the preventive actions.
Granulated glass wool is spread by e.g. a blower over the area 3~7S~
surrounded by the booms. The material, into which the oil is absorbed and which gathers towards -the booms, forms kind of miniature mountains, the tops of which go under the surface of the water.
This combination of the boom and the granulated glass wool forms a protective structure which prevents the further spreading of oil, even when -the sea is rough. From the area limited by the booms, it is possible to lift the oily wool back to the vessel with e.g. a grab bucket fixed to a hydraulic crane boom, or with a nylon net. The catch is emptied into a funnel leading it into a centrifuge or on to a suction wire.
After the centrifugalizing or the suction process, where the oil is separated by means of centrifugal force or suction air from the granulated mineral wool, the oil is lead to a separate container, which can be either a big, floating "sock" made of rubber or some other container. The granulated wool can be e.g.
~blown or otherwise conveyed to the surface of the sea for a new recovery process. This can be repeated over and over again. Thus it is possible to master a limited leakage with this method until the leakage is stopped or the whole bunker in the vessel is emptied to the sea level and other actions to save the situation have been organized.
It is already known to use mineral wool to absorb and to retain oil from the surface of the water (the Finnish Patent No 43289, the US Patent No 3,933,632 and the British Patent No 1 235 463), both glass wool and rock wool. The great capacity of the mineral wool to absorb oil has been demonstrated in these methods.
In these methods the used mineral wool has been regarded as a non-recurrent material, which is burned together with the oil absorbed in it. When the material is burned, the binding material on the fibre is destroyed and the material loses its good absorbtive and floating qualities. The binding material is a very important factor as to the absorbtion process. To coat the burned fibre anew is very labourous and in the field work of the oil prevention practically impossible, as the covering requires, amon~ other things, an accurate heat treatment. The coal which remains on the fibre after the burning i5 not good enough as to its absorbtive qualities, and furthermore, it can be washed away.
When the mineral wool is used as a non-recurrent material there are no specific requirements as to its oil retaining capasity.
One has been satisfied with the absorbtive or absorbent capacity, which is inherent in most mineral wool materials. With the oil retaining capacity it is thus meant its ability to retain oil in itself when lifted up in the air. This property is essential in the method, where granulated glass wool is used as ~a "transfer vessel", when the oil is removed from the water to the tanker. The retaining of the oil, on the other hand, must not be excessive, as in some well known methods, where heavy metals are added to the fibre structure of the mineral wool in order to improve the absorbtion and retaining capacities. By so doing the material looses most of its floating capacity and thus makes it difficult to remove the oil by other methods than by burning. It is known, as well, that mineral wool whose volume weight is relatively small, absorbs more oil in comparison to its weight than a heavier wool, but, correspondingly, the retaining capacities decrease so much that this prevents the transference o~ oil from one place to another, as the material acts lika a leaking "transfer vessel". The use of non-recurrent material in the vessel presupposes a very large storage of mineral wool, and this is why its use as a preventive material has not reached the level which its properties imply.
The present invention is based on the discovery that one particular glass wool material in the form of granulated glass wool possesses such an inner structure - after having been made of a proper glass wool blank~bound with plastic resin and heat-treated - that it has a notable capacity of retaining oil and that it is possible to remove oil mechanically out of the structure by using earlier known methods such as suction and centrifugalizing so that both the structure of the glass wool is preserved as well as the resin on the fibres after the oil 7~-~
removal treatment. This makes it possible to use the same glass wool material repeatedly, and, consequently there is needed only a limited storage of glass wool on e.g. a tanker, which, further, makes it possible for the crew itself to carry out the prevention actions with proper equipment.
It is a characteristic feature of the method according to the invention that by using the already known method of suction or centrifugalizing it is possible to remove and to recover at least 90 ~ of the oil absorbed in the granulated wool providing that the degree of absorbtion into the wool is adequate. It has been proved by experiments that by squeezing the oil out it is impossible to remove the same quantity of oil without breaking the structure.
It is a characteristic feature of the granulated mineral wool used in this method that after the described oil removal it can abosorb essentially the same quantity of oil as the removed one once again.
A characteristic feature of the granulated wool used in this method is also the fact that the oil is absorbed from the surface of the sea to the free spaces in between the fibres and that when the wool is lifted from the see permitting it to drain for one minute, the major part or at least 60 ~ of the absorbed oil remains in it.
A characteristic feature of the granulated wool used in this method is also that a limited amount of moisture in the wool does not essentially impair its utilization in this method.
A characteristic feature of the granulated wool used in this method is also that the absorbed oil does not significantly flow away with the slow passing through of the water caused by the rough sea.
It has been discovered that the best material for this purpose is granulated wool which consists of minor, one-size mineral wool pieces, and where the amount of loose fibres is small. The average diameter of -the fibres must be from 3 to 2~um. There should not notably be so called pearls. The volume weight of the granulated woo1 should preferably be from 40 to 120 kg/m3 and most suitably from 70 to 110 kg/m3. The fibres must be coated with plastic resin, which, at the same time, bonds the fibres together. The granulate is made by cutting a mineral wool blank in pieces.
A characteristic feature of the granules of the described material is their elasticity which arouses from the homogenity of the structure and whicH makes it possible that it including the coating material can endure mechanical treatment such as lifting out of the water by drug bucket, net or the like;
centrifugalizing, suction or blowing by a fan or some other kind of spreading it out without being damaged.
It has been proved by experiments that the granulate used in the method blown on the surface of the water will float on the water at least 6 months and that the portion sinking is appr. 1 ~.
It has also been proved experimentally that the properties of the granulate used in the method are not essentially impaired after having been stored even for several years tightly packed.
.~thou~h, in the described embodiments of the invention, the material used has been glass wool it does not range out the possibility of using other mineral wools as well, if only their properties meet the requirements of the method. Although in the described embodiment oil is removed from the surface of the water back to the tanker, from where the leakage has taken place, the method of the invention is not restricted to this application but can also be used in other kinds of vessels, especially in vessels built for oil removal purposes. In this latter case it is possible to use a wire sunk into the water as an oil collecting means. It can also be used on harbour docks and equipments, in oil recovery actions taken from the ice or any other firm base or for removal of oil from diches and pits, etc.
. . . . . . . .
75~
The method accordinc3 to the invention can also be used for removal of other liquids similar to oil, such as: combustible oils, kerosene, metanol, alcohols, solvents and paints.
Examples:
1. The capasity of absorbtion and of retention was measured with the equipment which consisted of an absorbtion vessel of 6.8 litres furnished with a bottom with holes having the diameter of 260 mm and of an oil container having a diameter of 300 mm. Granulate of glass wool of various volume weights were placed in the absorbtion vessel which was placed into the oil container. After the absorbtion the bottom tap of the oil container was opened and the amount of the absorbed oil was measured. The absorbtion vessel was lifted out of the container and the oil was allowed to drain during one minute of time, after which the oil retained by the wool was measured. The used oil was commercial diesel fuel. The experimental temperature was + 20 C.
The results of are presented in the table below:
Test Volume Weighed Absorbed Retained Absorbed Retained Retention~
weight granulate l of o/ l of o/ of kg/m3 (g) ml ml kg of g kg of g absorbtion 1 120 816 5930 45807.2 5.6 78
A METHOD OF REMOVING OIL OR SIMILAR LIQUIDS FROM THE SURFACE OF
WATER OR A SOLID MATERIAL.
The present invention relates to a method of removing oil or similar liquids from the surface of water or a solid material, and to its reyeneration.
It is an object of the present invention to provide a new method which, in case of a leak, makes the oil removal possible, especially to a tanker by its own crew; or similar oil prevention actions.
Most of the oil accidents on the water areas happen so that a tanker springs a leak and a limited amount of oil runs into the water. Relatively seldom the leak is so large that whole of the tanker runs empty, although this is really very disastrous. The major part of the oil damages is thus to be prevented, if the tanker itself has been provided with the proper prevention equipment and material and the prevention acts can be started immediately during the first minutes of the accident.
The process of the preventive actions are as follows:
When the oil leak has happened the leakage area is surrounded by e.g. boom nets in order to master the spreading of the oil and in order to be able to carry out the preventive actions.
Granulated glass wool is spread by e.g. a blower over the area 3~7S~
surrounded by the booms. The material, into which the oil is absorbed and which gathers towards -the booms, forms kind of miniature mountains, the tops of which go under the surface of the water.
This combination of the boom and the granulated glass wool forms a protective structure which prevents the further spreading of oil, even when -the sea is rough. From the area limited by the booms, it is possible to lift the oily wool back to the vessel with e.g. a grab bucket fixed to a hydraulic crane boom, or with a nylon net. The catch is emptied into a funnel leading it into a centrifuge or on to a suction wire.
After the centrifugalizing or the suction process, where the oil is separated by means of centrifugal force or suction air from the granulated mineral wool, the oil is lead to a separate container, which can be either a big, floating "sock" made of rubber or some other container. The granulated wool can be e.g.
~blown or otherwise conveyed to the surface of the sea for a new recovery process. This can be repeated over and over again. Thus it is possible to master a limited leakage with this method until the leakage is stopped or the whole bunker in the vessel is emptied to the sea level and other actions to save the situation have been organized.
It is already known to use mineral wool to absorb and to retain oil from the surface of the water (the Finnish Patent No 43289, the US Patent No 3,933,632 and the British Patent No 1 235 463), both glass wool and rock wool. The great capacity of the mineral wool to absorb oil has been demonstrated in these methods.
In these methods the used mineral wool has been regarded as a non-recurrent material, which is burned together with the oil absorbed in it. When the material is burned, the binding material on the fibre is destroyed and the material loses its good absorbtive and floating qualities. The binding material is a very important factor as to the absorbtion process. To coat the burned fibre anew is very labourous and in the field work of the oil prevention practically impossible, as the covering requires, amon~ other things, an accurate heat treatment. The coal which remains on the fibre after the burning i5 not good enough as to its absorbtive qualities, and furthermore, it can be washed away.
When the mineral wool is used as a non-recurrent material there are no specific requirements as to its oil retaining capasity.
One has been satisfied with the absorbtive or absorbent capacity, which is inherent in most mineral wool materials. With the oil retaining capacity it is thus meant its ability to retain oil in itself when lifted up in the air. This property is essential in the method, where granulated glass wool is used as ~a "transfer vessel", when the oil is removed from the water to the tanker. The retaining of the oil, on the other hand, must not be excessive, as in some well known methods, where heavy metals are added to the fibre structure of the mineral wool in order to improve the absorbtion and retaining capacities. By so doing the material looses most of its floating capacity and thus makes it difficult to remove the oil by other methods than by burning. It is known, as well, that mineral wool whose volume weight is relatively small, absorbs more oil in comparison to its weight than a heavier wool, but, correspondingly, the retaining capacities decrease so much that this prevents the transference o~ oil from one place to another, as the material acts lika a leaking "transfer vessel". The use of non-recurrent material in the vessel presupposes a very large storage of mineral wool, and this is why its use as a preventive material has not reached the level which its properties imply.
The present invention is based on the discovery that one particular glass wool material in the form of granulated glass wool possesses such an inner structure - after having been made of a proper glass wool blank~bound with plastic resin and heat-treated - that it has a notable capacity of retaining oil and that it is possible to remove oil mechanically out of the structure by using earlier known methods such as suction and centrifugalizing so that both the structure of the glass wool is preserved as well as the resin on the fibres after the oil 7~-~
removal treatment. This makes it possible to use the same glass wool material repeatedly, and, consequently there is needed only a limited storage of glass wool on e.g. a tanker, which, further, makes it possible for the crew itself to carry out the prevention actions with proper equipment.
It is a characteristic feature of the method according to the invention that by using the already known method of suction or centrifugalizing it is possible to remove and to recover at least 90 ~ of the oil absorbed in the granulated wool providing that the degree of absorbtion into the wool is adequate. It has been proved by experiments that by squeezing the oil out it is impossible to remove the same quantity of oil without breaking the structure.
It is a characteristic feature of the granulated mineral wool used in this method that after the described oil removal it can abosorb essentially the same quantity of oil as the removed one once again.
A characteristic feature of the granulated wool used in this method is also the fact that the oil is absorbed from the surface of the sea to the free spaces in between the fibres and that when the wool is lifted from the see permitting it to drain for one minute, the major part or at least 60 ~ of the absorbed oil remains in it.
A characteristic feature of the granulated wool used in this method is also that a limited amount of moisture in the wool does not essentially impair its utilization in this method.
A characteristic feature of the granulated wool used in this method is also that the absorbed oil does not significantly flow away with the slow passing through of the water caused by the rough sea.
It has been discovered that the best material for this purpose is granulated wool which consists of minor, one-size mineral wool pieces, and where the amount of loose fibres is small. The average diameter of -the fibres must be from 3 to 2~um. There should not notably be so called pearls. The volume weight of the granulated woo1 should preferably be from 40 to 120 kg/m3 and most suitably from 70 to 110 kg/m3. The fibres must be coated with plastic resin, which, at the same time, bonds the fibres together. The granulate is made by cutting a mineral wool blank in pieces.
A characteristic feature of the granules of the described material is their elasticity which arouses from the homogenity of the structure and whicH makes it possible that it including the coating material can endure mechanical treatment such as lifting out of the water by drug bucket, net or the like;
centrifugalizing, suction or blowing by a fan or some other kind of spreading it out without being damaged.
It has been proved by experiments that the granulate used in the method blown on the surface of the water will float on the water at least 6 months and that the portion sinking is appr. 1 ~.
It has also been proved experimentally that the properties of the granulate used in the method are not essentially impaired after having been stored even for several years tightly packed.
.~thou~h, in the described embodiments of the invention, the material used has been glass wool it does not range out the possibility of using other mineral wools as well, if only their properties meet the requirements of the method. Although in the described embodiment oil is removed from the surface of the water back to the tanker, from where the leakage has taken place, the method of the invention is not restricted to this application but can also be used in other kinds of vessels, especially in vessels built for oil removal purposes. In this latter case it is possible to use a wire sunk into the water as an oil collecting means. It can also be used on harbour docks and equipments, in oil recovery actions taken from the ice or any other firm base or for removal of oil from diches and pits, etc.
. . . . . . . .
75~
The method accordinc3 to the invention can also be used for removal of other liquids similar to oil, such as: combustible oils, kerosene, metanol, alcohols, solvents and paints.
Examples:
1. The capasity of absorbtion and of retention was measured with the equipment which consisted of an absorbtion vessel of 6.8 litres furnished with a bottom with holes having the diameter of 260 mm and of an oil container having a diameter of 300 mm. Granulate of glass wool of various volume weights were placed in the absorbtion vessel which was placed into the oil container. After the absorbtion the bottom tap of the oil container was opened and the amount of the absorbed oil was measured. The absorbtion vessel was lifted out of the container and the oil was allowed to drain during one minute of time, after which the oil retained by the wool was measured. The used oil was commercial diesel fuel. The experimental temperature was + 20 C.
The results of are presented in the table below:
Test Volume Weighed Absorbed Retained Absorbed Retained Retention~
weight granulate l of o/ l of o/ of kg/m3 (g) ml ml kg of g kg of g absorbtion 1 120 816 5930 45807.2 5.6 78
2 100 680 6280 52409.2 7.7 84 ! 3 62 422 5930 471014.0 11.2 80 4 52 354 6100 425017.2 12.0 70 136 4750 237034.9 17.4 50 -l of o = litres of oil kg of g = kilogrammes of granulates /
2. A centrifugalizing experiment was carried out by using a washing machine, whose rotational speed was 2700 r/min, the centrifugaliz-ing time was one minute, the temperature was
2. A centrifugalizing experiment was carried out by using a washing machine, whose rotational speed was 2700 r/min, the centrifugaliz-ing time was one minute, the temperature was
3~75~ ~
+ 20 C. The oil used was diesel fuel and as absorbtion material granulated glass wool having a volume weight of 48 kg/m3 was used.
Test 1.
Phases Weight of Retained Retained Centri- Separated Oil re- Separate~
original oil + oil fugalized . oil mained oil of granulate granulate granulate in retained granulate (g) ~g) (g) (g) (g) (g) (g~ ,
+ 20 C. The oil used was diesel fuel and as absorbtion material granulated glass wool having a volume weight of 48 kg/m3 was used.
Test 1.
Phases Weight of Retained Retained Centri- Separated Oil re- Separate~
original oil + oil fugalized . oil mained oil of granulate granulate granulate in retained granulate (g) ~g) (g) (g) (g) (g) (g~ ,
4 602 3386 2886 611 2775 111 96 Test 2.
. .
' '3. The use of moist wool in absorbtion and its floating capacityl.
The experiment was carried out in the laboratory for the combustible and lubrication materials of the Technical Research Institute of Finland in Espoo, on the 7th of April, 1978. The volume weight was defined by weighing and by measuring and with the method of Klein & Ander. The percentage of the moisture was defined according to DIN 51718.
The oil retention capacity was defined by the method of Sturz & Klein. The experimental temperature was + 20 C and the oil diesel fuel.
~, .
3t75 Results:
Samp]e Volume Moisture Volume Oil retention Floatiny weight weight of capacity capacity dxy substance 1 of oil/ 1 h after the kg/m3 % kg/m3 ky of granu mLx g 1 59.2 0.4 59.0 10.5 > 99 2 59.7 0.72 59.0 10.9 > 99 3 93.6 23.7 71.4 5.87 > 99 4. 10,3 g of granulated glass wool in which 49,8 g of crude oil had been retained was placed in a glass tube having a diameter of 40 mm and a height of 300 mm. 10 l of water was poured through the tube with a speed of 5 l/h. The separated quantity of oil was 3.6 g or 6 % of the retained oil,
. .
' '3. The use of moist wool in absorbtion and its floating capacityl.
The experiment was carried out in the laboratory for the combustible and lubrication materials of the Technical Research Institute of Finland in Espoo, on the 7th of April, 1978. The volume weight was defined by weighing and by measuring and with the method of Klein & Ander. The percentage of the moisture was defined according to DIN 51718.
The oil retention capacity was defined by the method of Sturz & Klein. The experimental temperature was + 20 C and the oil diesel fuel.
~, .
3t75 Results:
Samp]e Volume Moisture Volume Oil retention Floatiny weight weight of capacity capacity dxy substance 1 of oil/ 1 h after the kg/m3 % kg/m3 ky of granu mLx g 1 59.2 0.4 59.0 10.5 > 99 2 59.7 0.72 59.0 10.9 > 99 3 93.6 23.7 71.4 5.87 > 99 4. 10,3 g of granulated glass wool in which 49,8 g of crude oil had been retained was placed in a glass tube having a diameter of 40 mm and a height of 300 mm. 10 l of water was poured through the tube with a speed of 5 l/h. The separated quantity of oil was 3.6 g or 6 % of the retained oil,
5. Suction tests were carried out by using a vessel with a screen bottom, in which a vacuum of 900 mm water was maintained. Tho volume weight of the granulate was 48 kg/m3 and diesel fuel was used as oil, the temperature was + 20 C.
; The suction time was 1 min.
1.
5'~
Pllases Weight of Retained Retained ~7eight of Sepa- Oil Separated/
; original oil + oil granulate rated retained retained granulate granulate aft suction ~oil in the treatment granulate (g) (g) (g) (g) (g) (g) Test 1.
1 80 503 423 178 325 9876.8, 4 186 457 271 179 278 -7102.5 Test 2.
3 l39 382 243 135 247 -4 102 Test 3.
; The suction time was 1 min.
1.
5'~
Pllases Weight of Retained Retained ~7eight of Sepa- Oil Separated/
; original oil + oil granulate rated retained retained granulate granulate aft suction ~oil in the treatment granulate (g) (g) (g) (g) (g) (g) Test 1.
1 80 503 423 178 325 9876.8, 4 186 457 271 179 278 -7102.5 Test 2.
3 l39 382 243 135 247 -4 102 Test 3.
Claims (4)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A method of removing oil or similar liquids from the surface of water, comprising the steps of:
(a) providing a granulated mineral wool mass:
(b) spreading same mass over an area of the surface of water, whereby the liquid is absorbed in the granulated mineral wool;
(c) collecting at least a major part of particles of said mass containing absorbed liquid from the surface of water;
(d) separating said absorbed liquid from said particles by subjecting the particles to the influence of a centrifugal force or to a pressure difference;
(e) while separating the absorbed liquid, maintaining mechanical stress to which the particles are subjected at a relatively low value such as to avoid breaking down the structure thereof during the step of separating said absorbed oil or similar liquids; and (f) repeating the steps (b) through (e) while using granulated mineral wool mass obtained at the end of said step (d) of separating said absorbed oil or similar liquid.
(a) providing a granulated mineral wool mass:
(b) spreading same mass over an area of the surface of water, whereby the liquid is absorbed in the granulated mineral wool;
(c) collecting at least a major part of particles of said mass containing absorbed liquid from the surface of water;
(d) separating said absorbed liquid from said particles by subjecting the particles to the influence of a centrifugal force or to a pressure difference;
(e) while separating the absorbed liquid, maintaining mechanical stress to which the particles are subjected at a relatively low value such as to avoid breaking down the structure thereof during the step of separating said absorbed oil or similar liquids; and (f) repeating the steps (b) through (e) while using granulated mineral wool mass obtained at the end of said step (d) of separating said absorbed oil or similar liquid.
2. The method according to claim 1, wherein the liquid in the granulated wool is separated by centrifugalizing.
3. The method according to claim 1, wherein the liquid in the granulated mineral wool is separated by means of suction.
4. The method according to claims 1, 2 and 3, wherein at least 90% of the liquid retained in the granulated mineral wool is separated.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI791632 | 1979-05-23 | ||
| FI791632A FI60693C (en) | 1979-05-23 | 1979-05-23 | FOERFARANDE FOER REGENERERING AV MINERALULL SOM ANVAENDS FOER BEKAEMPNING AV OLJA ELLER LIKNANDE AEMNEN |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1149754A true CA1149754A (en) | 1983-07-12 |
Family
ID=8512664
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000352450A Expired CA1149754A (en) | 1979-05-23 | 1980-05-22 | Method of removing oil or similar liquids from the surface of water or a solid material |
Country Status (13)
| Country | Link |
|---|---|
| JP (1) | JPS55159891A (en) |
| BE (1) | BE883462A (en) |
| BR (1) | BR8003204A (en) |
| CA (1) | CA1149754A (en) |
| DE (1) | DE3017388A1 (en) |
| DK (1) | DK225080A (en) |
| FI (1) | FI60693C (en) |
| FR (1) | FR2457345A1 (en) |
| GB (1) | GB2053883B (en) |
| IT (1) | IT8067804A0 (en) |
| NL (1) | NL8002942A (en) |
| NO (1) | NO801526L (en) |
| SE (1) | SE8003857L (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NO165968C (en) * | 1988-10-27 | 1991-05-15 | Norva Invest As | OIL COLLECTING. |
| FR2646189B1 (en) * | 1989-04-24 | 1991-07-05 | Saint Gobain Isover | TECHNIQUE FOR REMOVING OIL POLLUTANTS AND MATERIAL THEREFOR |
| US5215407A (en) * | 1989-10-05 | 1993-06-01 | Brelsford Jeffrey A | Process of cleaning oil spills and the like |
| WO1992019692A1 (en) * | 1991-05-03 | 1992-11-12 | Helmut Schiwek | Floating oil absorber and disposal in pyrolysis installations |
| DE9107420U1 (en) * | 1991-06-17 | 1992-03-19 | Schmidt, Peter, 2000 Hamburg | Device for removing oil floating on the water surface with an oil binding agent and an oil binding agent therefor |
| HUT70676A (en) * | 1992-06-01 | 1995-10-30 | Jakab | Purification of water contaminated with kerosene, oil, petrol and ther organic materials by means of and adsorptional process, adsorptional modules, method and apparatus for purifying such water |
| EP0572694B1 (en) * | 1992-06-02 | 1997-09-17 | DÄMMSTOFFE HELD GmbH & CO. WERK FÜR DÄMMSTOFFE | Oil-absorbent based on mineral wool and binder, and process for its manufacture |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1235463A (en) * | 1967-09-05 | 1971-06-16 | Cape Insulation Ltd | Process for absorbing oil |
| NL7214191A (en) * | 1971-10-20 | 1973-04-25 | ||
| NL7308973A (en) * | 1972-06-30 | 1974-01-02 | ||
| US3933632A (en) * | 1973-05-21 | 1976-01-20 | Electrolysis Pollution Control Inc. | Removal of immiscible fluids from water surfaces and lake beds |
-
1979
- 1979-05-23 FI FI791632A patent/FI60693C/en not_active IP Right Cessation
-
1980
- 1980-04-25 GB GB8013749A patent/GB2053883B/en not_active Expired
- 1980-05-07 DE DE19803017388 patent/DE3017388A1/en not_active Withdrawn
- 1980-05-21 NL NL8002942A patent/NL8002942A/en not_active Application Discontinuation
- 1980-05-21 FR FR8011304A patent/FR2457345A1/en not_active Withdrawn
- 1980-05-22 IT IT8067804A patent/IT8067804A0/en unknown
- 1980-05-22 BR BR8003204A patent/BR8003204A/en unknown
- 1980-05-22 NO NO801526A patent/NO801526L/en unknown
- 1980-05-22 SE SE8003857A patent/SE8003857L/en not_active Application Discontinuation
- 1980-05-22 DK DK225080A patent/DK225080A/en unknown
- 1980-05-22 CA CA000352450A patent/CA1149754A/en not_active Expired
- 1980-05-23 JP JP6797080A patent/JPS55159891A/en active Pending
- 1980-05-23 BE BE0/200749A patent/BE883462A/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| NO801526L (en) | 1980-11-24 |
| FI791632A (en) | 1980-11-24 |
| GB2053883B (en) | 1983-04-07 |
| IT8067804A0 (en) | 1980-05-22 |
| DK225080A (en) | 1980-11-24 |
| BR8003204A (en) | 1980-12-30 |
| FR2457345A1 (en) | 1980-12-19 |
| JPS55159891A (en) | 1980-12-12 |
| BE883462A (en) | 1980-09-15 |
| SE8003857L (en) | 1980-11-24 |
| FI60693C (en) | 1982-03-10 |
| FI60693B (en) | 1981-11-30 |
| GB2053883A (en) | 1981-02-11 |
| DE3017388A1 (en) | 1980-12-04 |
| NL8002942A (en) | 1980-11-25 |
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| MKEX | Expiry |