EP0362233A1 - Procede et dispositif de separation de substances contenues dans un liquide - Google Patents

Procede et dispositif de separation de substances contenues dans un liquide

Info

Publication number
EP0362233A1
EP0362233A1 EP88904175A EP88904175A EP0362233A1 EP 0362233 A1 EP0362233 A1 EP 0362233A1 EP 88904175 A EP88904175 A EP 88904175A EP 88904175 A EP88904175 A EP 88904175A EP 0362233 A1 EP0362233 A1 EP 0362233A1
Authority
EP
European Patent Office
Prior art keywords
liquid
ultrasonic
sound
flow
particles
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP88904175A
Other languages
German (de)
English (en)
Inventor
Wolfgang Dipl.-Ing. Stuckart
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=3510228&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0362233(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Individual filed Critical Individual
Publication of EP0362233A1 publication Critical patent/EP0362233A1/fr
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/28—Mechanical auxiliary equipment for acceleration of sedimentation, e.g. by vibrators or the like
    • B01D21/283—Settling tanks provided with vibrators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D43/00—Separating particles from liquids, or liquids from solids, otherwise than by sedimentation or filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
    • B01J19/10—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing sonic or ultrasonic vibrations
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/34—Treatment of water, waste water, or sewage with mechanical oscillations
    • C02F1/36—Treatment of water, waste water, or sewage with mechanical oscillations ultrasonic vibrations

Definitions

  • the invention relates to a process for flocculation, precipitation, agglomeration or coagulation of ingredients or microorganisms dissolved, colloidally dissolved, suspended or emulsified in a liquid and for separating these substances or microorganisms from this liquid, the one loaded with the ingredients or microorganisms to be separated Liquid is subjected to the field effect of ultrasonic waves, which bring about an accumulation of particles to be separated in the vibration node regions or antinode regions of the ultrasonic wave, and the particles thus collected are separated from the liquid, which separation takes place in particular by sedimentation.
  • suspended particles or microorganisms which can also have submicroscopic dimensions, from liquids by sedimentation or by filtration in a reasonably short time, they have to be combined into larger particles or attached to larger particles. It can be made possible in a disperse system by removing the electrostatic surface charges of the particles (destabilization; and by supplying kinetic energy (transport; coagulation processes.
  • the sound radiation pressure conveys the particles into the rapid abdominal areas of the ultrasound field, i.e. to those places where the deflection of the water mouse is greatest. If the ultrasound frequency exceeds a certain cut-off frequency fo, the particles only minimally follow the vibration of the water. In the fast bellies there is therefore maximum relative movement between the particles and the oscillating water.
  • the Wassermoieküie periodically pass through the rapid abdominal areas at right angles with maximum sound velocity. Due to the particles accumulated in the rapid abdominal areas, which only minimally participate in the vibration of the water, there is a reduction in the cross-section that can be flowed through. The speed of the oscillating water must therefore increase between the particles, which inevitably results in a local reduction in the pressure between the particles while maintaining the total energy. This relative negative pressure between the particles causes their mutual attraction, which according to the invention is used to coagulate the particles.
  • the method according to the invention of the type mentioned at the outset is characterized in that the liquid loaded with ingredients or microorganisms is exposed to one or more fields of ultrasound waves, the ultrasound frequency f being greater than one seventh of the limit frequency fo, the range above half the limit frequency fo being preferred is and applies to fo:
  • standing ultrasonic wave fields can be done simply by exciting piezoelectric electro-acoustic transducers in the resonance frequency or in one of the odd-numbered harmonics of the sound reinforcement room forming a resonator, so that a standing ultrasonic wave field builds up in the sound reinforcement room, although as a resonator the package of all sounded acoustic waves Rails including those OR surfaces on which the sound waves are reflected is to be understood.
  • the forces of a standing and flat ultrasonic wave field acting on the liquid to be cleaned cause the particles to be arranged in surfaces perpendicular to the direction of sound propagation.
  • the distance between the surfaces corresponds to half the length of the ultrasonic waves in the liquid in question.
  • the particles agglomerate in the respective areas. Agglomerates that are so large that they can be easily separated from the liquid by sedimentation or filtration.
  • the liquid is sonicated in the flow. It is furthermore favorable if the liquid is passed through one or more fields of standing ultrasonic waves in a flow approximately at right angles to the direction of sound propagation of the ultrasound. It is also advantageous if the liquid flows in a laminar manner.
  • the particles When the suspension flows through the ultrasonic field, the particles are held there and agglomerated, while the liquid leaves the sound field after cleaning.
  • an attachment room can be provided below the PA. If the direction of sound propagation is horizontal, the particles arrange themselves in vertical planes and, after they have joined together to form larger agglomerates, sink into the sedimentation space following gravity.
  • the flow rate of the liquid in the sound system can also be chosen so high that the coagulates are discharged with the liquid; the ingredients are then separated from the liquid by sedimentation or filtration.
  • the liquid can also be passed through the ultrasound field in or against the direction of sound propagation of the ultrasound field.
  • An advantageous embodiment of the method according to the invention provides that the liquid is sonicated in a standing ultrasonic wave field that is formed between two parallel and oppositely arranged ultrasonic transducers, the opposite ultrasonic transducers being excited with electrical vibrations of the same frequency, the mutual phase angle of which changes constantly and so a slow relative movement of the wave field in relation to the ultrasonic transducers.
  • the particular advantage of this embodiment is that the particles, which have been arranged in the Sehnelledauch vom, follow the relative movement of the ultrasonic field, which is advantageously selected transversely to the direction of flow of the liquid, and in this way coagulate with a particularly low energy expenditure and simply from the liquid can be separated.
  • Another embodiment of the method according to the invention provides that the liquid is exposed to two ultrasound fields, which overlap one another spatially within the coating area and act on the liquid simultaneously or alternately, preferably using two flat ultrasound fields which intersect at right angles, whereby the intersection lines of the vibration node planes run parallel to the direction of flow of the liquid.
  • a particular advantage of this embodiment is then that the particles are arranged in lines and thereby concentrate there to a much greater extent than with a one-dimensional sound system.
  • the lines in which the particles arrange themselves represent the intersection of the rapid abdominal planes of the two ultrasound fields.
  • a further advantageous embodiment of the method according to the invention is characterized in that the liquid is in a cylindrical ultrasonic field, the oscillation nodes of which are approximately cylindrical and coaxial surfaces and through which the liquid is guided approximately parallel to the geometric axis of the field, or in succession in several such fields is sonicated.
  • the ultrasound treatment is carried out under pressure to avoid cavitation in closed containers or pipes leads, which is higher than the sum of the vapor pressure of the liquid and the pressure amplitude of the ultrasonic vibration.
  • the pass-through liquid path is advantageously chosen to be less than 1 m, with a preference for the range below 0.6 m.
  • the power of the electrical oscillation with which the ultrasonic transducers are excited is advantageously chosen with less than 3 watts per cm 2 of the controlled ultrasonic transducer surface, the range between 0.5 and 2 watts / cm 2 being preferred.
  • the energy input per m 3 of suspension is advantageously selected between 0.05 and 10 kWh, depending on its density and the electrostatic surface charge of the suspended particles, the range between 0.1 and 4 kWh being preferred.
  • sonication with ultrasonic frequencies between fo / 3 and 10 fo is advantageously used, with frequencies between fo / 2 and 4 fo being particularly favorable for widely graded particle size distributions.
  • frequencies between fo / 2 and 4 fo are particularly favorable for widely graded particle size distributions.
  • frequencies between 2 fo and 12 fo are advantageous to work at frequencies between 2 fo and 12 fo, the range between 3 fo and 5 fo being preferred.
  • Ultrasound frequencies between fo / 2 and 10 fo are advantageous for the coagulation of coal particles, which are in water, and for their separation, a particularly intensive flocculation in the range between fo and 4 fo being achieved.
  • Ultrasonic frequencies between fo / 7 and 10 fo are advantageously used for the coagulation of ingredients of higher density, such as metal dusts, the range between fo / 6 and fo / 2 being preferred in view of an economical use of energy.
  • the coagulates grow, their radius R increases and the limit frequency fo, which is dependent on R, becomes smaller.
  • the agglomerates formed in the first stage can then be combined again in the subsequent stages.
  • the radius R of the agglomerates can grow up to a quarter of the respective ultrasonic wavelength.
  • sonication with amplitude-modulated ultrasound can achieve significantly faster coagulation.
  • Amplitude modulation with frequencies DIS 20 kHz has proven to be particularly advantageous, the modulation signal being e.g. Sine and square wave signals can be used.
  • Activated carbon or other surface-active substances e.g. some clays, used as adsorption media for liquid ingredients, which can also be dissolved.
  • a powdery introduction of the adsorption media results in a more intimate mixing with the liquid and thus enables shorter contact times, thereby avoiding desorption processes.
  • the agglomerated particles can be separated from the liquid by sedimentation or filtration.
  • the ultrasound treatment can also promote the attachment of the liquid contents to the adsorption medium.
  • the coal separation in the water can be improved by the formation of larger and more stable flakes.
  • the invention further relates to a device for performing the method according to the invention.
  • an advantageous embodiment of such a device is characterized in that the sound reinforcement chamber of the device is formed by a straight tube, which is sealed at one end by an ultrasound transducer and at the other end by a preferably reverberant reflector at right angles and tightly, near the side of the two tube ends the supply and discharge lines for the liquid to be sonicated are attached.
  • the sound reinforcement chamber of the device is formed by a straight tube, which is sealed at right angles and tightly at its lower end by an ultrasonic transducer and is open at its upper end, near the side of the two tube ends the inlet and outlet for the liquid to be sonicated are attached.
  • a very simply constructed device is characterized in that the device has a cladding tank, on the bottom of which one or more ultrasonic transducers are mounted horizontally.
  • a preferred embodiment of the device according to the invention has a preferably cuboid sound tank, which can also be open at the top, and forms the sound reinforcement of the liquid; this coating tank has one or more ultrasonic transducers on a side wall parallel to the horizontal direction of flow of the liquid and sound reflectors on the opposite parallel side wall. The sound is spread horizontally and at right angles to the direction of flow.
  • the inlet and outlet for the liquid are located on the two rare walls perpendicular to the direction of flow.
  • One or more, preferably funnel-like, settling spaces, which have removal devices at their lowest points, are provided in the bottom of the sonication tank.
  • the sedimentation spaces are preferably separated from the casing tank by a horizontal grid-like flow orifice. After the inlet and before the outlet, vertical calming grids can be provided, which are at right angles to the direction of flow.
  • a baffle in the sonication tank Immediately in front of the inlet opening and the outlet opening, you can attach a baffle in the
  • a further embodiment of the device according to the invention is characterized in that the sound reinforcement chamber of the device is formed by a sound reinforcement chamber, through which the liquid flows horizontally, so that one or more ultrasonic transducers or ultrasonic transducers can be found on the two rare walls of the sound reinforcement chamber that run at right angles to the direction of flow and refiectors are arranged opposite and parallel to each other, and that one or more funnel-shaped sedimentation chambers are provided in the bottom of the sound-absorbing chamber, which are preferably delimited at the top by flow baffles and have removal devices for the sunken particles at their lowest points.
  • the chamber of the device is formed by a vessel in the form of a straight line Cylinder is made of preferably sound-resistant material, in which a cylindrical, radially vibrating ultrasonic transducer is installed coaxially.
  • a cylindrical, radially vibrating ultrasonic transducer is installed coaxially.
  • the common axis of the transducer and the vessel can be perpendicular, the liquid being first passed from top to bottom through the interior of the tubular ultrasonic transducer and then exiting at its lower end into the outer vessel and flowing up there while the Coagulates sink down and are separated from the liquid.
  • a further embodiment of the device according to the invention is characterized in that the sound reinforcement chamber of the device is formed by a flow-through cuboid sound reinforcement tank, into which two planar walls, at right angles to one another, are built, which groups of ultrasonic transducers carry, these walls facing the side surfaces
  • Public address tank run parallel and preferably cut each other within the public address room so that the public address room is divided into two or more flowable sub-rooms.
  • the flow through the peeling tank can e.g. can be divided into four sub-rooms, which can also have a different cross-section and can be flowed through both in parallel and in series, the individual sub-rooms can also be flowed through in opposite directions.
  • Another embodiment of the device according to the invention is characterized in that a parallel plate separator is arranged in the sound reinforcement area of the device, through which the intermediate spaces between the separating plates the liquid is passed, and that two planes Groups of ultrasonic generators are arranged parallel to the separating plate pack, the entire separating plate pack lying between the ultrasonic transducers, and the thickness of the separating plates preferably corresponding to an odd multiple of a quarter of the wavelength of the ultrasound in these separating plates and the surface roughness of the separating plates not exceeding one tenth of the ultrasonic wavelength.
  • a standing wave field is generated which moves relative to the ultrasonic transducers in such a way that the vertical component of the relative movement is directed downward.
  • the particular advantage of this embodiment is that the particles are coagulated in the ultrasonic field and, following the movement of the field, are conveyed to the separating plates and sedimented there, as a result of which a much higher separation performance is achieved than in conventional parallel plate separators.
  • ultrasound transducers made of piezoelectric plastics such as e.g. Find polyvinylidene fluoride (PVDF).
  • PVDF polyvinylidene fluoride
  • FIG. 1 shows a first embodiment of the device according to the invention in section
  • Fig. 2a shows a second embodiment of the device according to the invention in horizontal section along the line Ila-IIa in 2b and Fig. 2b this embodiment in section along the line IIb-IIb,
  • FIG. 3a shows another embodiment of the device according to the invention in longitudinal section along the line IIIa-IIIa in FIG. 3b and FIG. 3b this embodiment in section along the line III-IIIb,
  • FIG. 4a a further embodiment of the device according to the invention in vertical section and FIG. 4b this embodiment in section along the line IVb-IVb, in which a coaxial cylindrical wave field is generated in a tube,
  • FIG. 5 shows an embodiment of the device according to the invention, in which the free liquid surface serves as a sound reflector, in vertical section,
  • FIG. 6 shows a further embodiment of the device according to the invention in a vertical section, in which a tub is sonicated from below,
  • FIG. 9a a further embodiment of the device according to the invention in vertical section and FIG. 9b this embodiment in section along the line IXb-IXb,
  • Fig. 10 shows an embodiment of the device according to the invention in a view in which a two-dimensional sonication takes place
  • Fig. 11 is a schematic diagram of an embodiment of the device according to the invention provided with a parallel plate separator.
  • a straight pipe 1 is provided as the sound reinforcement chamber, which pipe 6 introduces the liquid 6 via a feed pipe 2 and out via a discharge pipe 3.
  • One pipe end 1a is sealed at right angles and tightly by an ultrasonic transducer 4, the other pipe end 1b by a reflector 5 designed as a rigid metal plate.
  • the ultrasonic transducer 4 is fed with high-frequency current.
  • a public address tank 8 is provided in all public address rooms, in the bottom 7 of which settling funnels 9 are installed, which have drainage nozzles 10 which can be closed at their lowest points.
  • the settling funnels 9 are separated from the sonication tank by a grille-like flow nozzle 11.
  • Ultrasonic transducers 4 and ultrasonic reflectors 12 are attached to the two side walls 13 and 14 of the sonication tank 8, which are parallel to the flow direction 6a, and are opposite and parallel to one another.
  • Flow orifices 15 and 16 and calming grilles 17 and 18 are arranged after the inlet pipe 2 and before the outlet pipe 3.
  • the flow direction 6a runs at right angles to the direction of sound propagation.
  • the device shown in FIGS. 3a and 3b has a sound reinforcement chamber 19 as the sound reinforcement chamber, on the front side walls 20 and 21 of which the ultrasonic transducer 4 and the reflector 12 are attached.
  • a sound reinforcement chamber 19 as the sound reinforcement chamber, on the front side walls 20 and 21 of which the ultrasonic transducer 4 and the reflector 12 are attached.
  • funnel-shaped settling spaces 9 are provided, at the lowest points of which closable removal nozzles 10 are attached.
  • the settling rooms 9 are separated from the sonication chamber 19 by a grille-like flow orifice 11.
  • the liquid is supplied via the inlet connection 2 and derived via the discharge pipe 3.
  • the flow direction 6a runs in the direction of sound propagation.
  • the front side walls 20, 21 run at right angles to the flow direction.
  • a vessel 22 in the form of a straight, cylindrical tube made of sound-resistant material is provided as the PA, in which a cylindrical, radially oscillating ultrasonic transducer 23 is installed coaxially.
  • a coaxial cylindrical ultrasonic field is generated in the vessel 22 .
  • the device shown in FIG. 5 consists of a straight vertical tube 1, into which the liquid is introduced via a nozzle 2 and is discharged via a further nozzle 3.
  • the lower tube end 1 a is sealed off by an ultrasonic transducer 4.
  • the upper tube end 1b is open.
  • the free liquid surface 37 acts here as a sound-soft reflector.
  • the device shown in FIG. 6 has a sound reinforcement pool 38 which is open at the top and on the bottom of which an ultrasonic transducer 4 is mounted horizontally.
  • the free liquid surface 37 acts as a sound-soft reflector.
  • the experimental arrangement shown in FIG. 8 is provided with a device according to the invention, the ultrasonic transducer 27 of which is fed by a broadband amplifier 33, this broadband amplifier being controlled by a high-frequency signal generator 32.
  • the public address room of the device is formed by a public address pool 24.
  • the ultrasonic transducer 27 is mounted on a brass plate 26 on a narrow side 25 of the soundproofing basin 24 and a reflector in the form of a brass plate 31 is arranged on the opposite narrow side 30 of the soundproofing basin 24.
  • the device shown in FIGS. 9a and 9b has a vertical cylindrical sound tank 39 as the sound chamber, which is closed at the bottom by a funnel-shaped settling chamber 9 which has a closable removal nozzle 10.
  • a tubular ultrasonic transducer 40 through which the liquid is guided into the PA, is coaxially installed in the PA tank 39.
  • the liquid 6 to be sonicated first flows through the ultrasonic transducer 40 and then flows upwards on the outside of this transducer in the sonication tank 39, after which it is conducted via the channel 41.
  • FIG. 10 shows a device which has a cuboid-shaped PA tank, in which two walls 43 and 44 are installed, which carry ultrasonic transducers 4.
  • the walls 43 and 44 run parallel to the side surfaces 45, 46, 47, 48 of the sound reinforcement tank 42 and are at right angles to one another and intersect one another, so that the sound reinforcement space is divided into four flowable spaces 50, 51, 52, 53.
  • the ultrasonic transducers form ultrasonic fields in the subspaces, which intersect at right angles.
  • the device shown in FIG. 11 has a parallel plate separator with a group of inclined and mutually parallel separator plates 54 and two ultrasonic transducers 4 parallel to the separator plates.
  • the coal content of suspension 28 was approx. 10 g / l.
  • the grain size distribution curve of the suspended carbon particles is shown in Fig. 7. Before the sonication test, the quickly settable grain size fraction was separated from the coal suspension 28 by sedimentation.
  • an approximately 3 mm thick brass plate 31 was immersed perpendicularly and parallel to the piezoceramic disc 27 in the suspension 28.
  • a high-frequency alternating voltage with a frequency of 1.1 MHz was then applied to the piezoceramic disk.
  • the high-frequency voltage was generated by means of a signal generator 32 and a British band amplifier 33.
  • the leading and the reflected electrical power were measured using a high-frequency wattmeter 34. In the experiment at hand, the leading power was measured at 7 watts. There was practically no reflected performance.
  • the carbon particles arranged in vertical planes 36 which were at a mutual normal distance of about 0.7 mm and were parallel to the piezoceramic disk 27.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Water Supply & Treatment (AREA)
  • General Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Physical Water Treatments (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • External Artificial Organs (AREA)
  • Extraction Or Liquid Replacement (AREA)
  • Treatment Of Liquids With Adsorbents In General (AREA)
  • Automatic Analysis And Handling Materials Therefor (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)
  • Removal Of Specific Substances (AREA)
  • Colloid Chemistry (AREA)

Abstract

Procédé et dispositif de floculation, de précipitation, d'agglomération ou de coagulation de substances ou de micro-organismes en dissolution, en dissolution colloïdale, en suspension ou émulsifiés dans un liquide. On expose le liquide à un ou plusieurs champs d'ondes ultrasoniques stationnaires dont la fréquence f est supérieure à un septième d'une fréquence de seuil fo qui est une fonction de la viscosité cinématique du liquide et du rayon effectif des particules présentes dans le liquide. Le dispositif comprend une cuve d'irradation acoustique contenant le fluide à purifier et un convertisseur ultrasonique qui dirige des rayonnements ultrasoniques sur une surface opposée de réflexion.
EP88904175A 1987-05-19 1988-05-17 Procede et dispositif de separation de substances contenues dans un liquide Pending EP0362233A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0126987A AT389235B (de) 1987-05-19 1987-05-19 Verfahren zur reinigung von fluessigkeiten mittels ultraschall und vorrichtungen zur durchfuehrung dieses verfahrens
AT1269/87 1987-05-19

Publications (1)

Publication Number Publication Date
EP0362233A1 true EP0362233A1 (fr) 1990-04-11

Family

ID=3510228

Family Applications (2)

Application Number Title Priority Date Filing Date
EP88890124A Expired - Lifetime EP0292470B1 (fr) 1987-05-19 1988-05-17 Procédé de séparation de substances des liquides et dispositif pour effectuer le procédé
EP88904175A Pending EP0362233A1 (fr) 1987-05-19 1988-05-17 Procede et dispositif de separation de substances contenues dans un liquide

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP88890124A Expired - Lifetime EP0292470B1 (fr) 1987-05-19 1988-05-17 Procédé de séparation de substances des liquides et dispositif pour effectuer le procédé

Country Status (14)

Country Link
US (1) US5164094A (fr)
EP (2) EP0292470B1 (fr)
JP (1) JPH02503528A (fr)
CN (1) CN1037463A (fr)
AT (2) AT389235B (fr)
AU (1) AU1726288A (fr)
CA (1) CA1320151C (fr)
DE (1) DE3865526D1 (fr)
ES (1) ES2027423T3 (fr)
GR (1) GR3003471T3 (fr)
NO (1) NO171539C (fr)
PL (1) PL160668B1 (fr)
RU (1) RU2067079C1 (fr)
WO (1) WO1988009210A1 (fr)

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PL272541A1 (en) 1989-03-20
CA1320151C (fr) 1993-07-13
CN1037463A (zh) 1989-11-29
AT389235B (de) 1989-11-10
NO171539B (no) 1992-12-21
NO890219L (no) 1989-01-18
JPH02503528A (ja) 1990-10-25
US5164094A (en) 1992-11-17
ATA126987A (de) 1989-04-15
DE3865526D1 (de) 1991-11-21
NO171539C (no) 1993-03-31
ES2027423T3 (es) 1992-06-01
WO1988009210A1 (fr) 1988-12-01
EP0292470A1 (fr) 1988-11-23
ATE68369T1 (de) 1991-11-15
NO890219D0 (no) 1989-01-18
GR3003471T3 (en) 1993-02-17
PL160668B1 (pl) 1993-04-30
EP0292470B1 (fr) 1991-10-16
AU1726288A (en) 1988-12-21
RU2067079C1 (ru) 1996-09-27

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