EP1144093A2 - Procede de filtration a courant transversal et installation pour sa mise en oeuvre - Google Patents

Procede de filtration a courant transversal et installation pour sa mise en oeuvre

Info

Publication number
EP1144093A2
EP1144093A2 EP00947732A EP00947732A EP1144093A2 EP 1144093 A2 EP1144093 A2 EP 1144093A2 EP 00947732 A EP00947732 A EP 00947732A EP 00947732 A EP00947732 A EP 00947732A EP 1144093 A2 EP1144093 A2 EP 1144093A2
Authority
EP
European Patent Office
Prior art keywords
medium
container
pressure
pump
batch tank
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.)
Withdrawn
Application number
EP00947732A
Other languages
German (de)
English (en)
Other versions
EP1144093A3 (fr
Inventor
Eduard Hartmann
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.)
Bucher Guyer AG
Original Assignee
Bucher Guyer AG
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
Application filed by Bucher Guyer AG filed Critical Bucher Guyer AG
Publication of EP1144093A2 publication Critical patent/EP1144093A2/fr
Publication of EP1144093A3 publication Critical patent/EP1144093A3/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/14—Ultrafiltration; Microfiltration
    • B01D61/147—Microfiltration
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
    • A23L2/00—Non-alcoholic beverages; Dry compositions or concentrates therefor; Their preparation
    • A23L2/02—Non-alcoholic beverages; Dry compositions or concentrates therefor; Their preparation containing fruit or vegetable juices
    • A23L2/08—Concentrating or drying of juices
    • A23L2/082—Concentrating or drying of juices by membrane processes
    • A23L2/087—Concentrating or drying of juices by membrane processes by ultrafiltration, microfiltration
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
    • A23L2/00—Non-alcoholic beverages; Dry compositions or concentrates therefor; Their preparation
    • A23L2/70—Clarifying or fining of non-alcoholic beverages; Removing unwanted matter
    • A23L2/72—Clarifying or fining of non-alcoholic beverages; Removing unwanted matter by filtration
    • A23L2/74—Clarifying or fining of non-alcoholic beverages; Removing unwanted matter by filtration using membranes, e.g. osmosis, ultrafiltration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/14—Ultrafiltration; Microfiltration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/14—Ultrafiltration; Microfiltration
    • B01D61/145—Ultrafiltration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/14—Ultrafiltration; Microfiltration
    • B01D61/20—Accessories; Auxiliary operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/14—Ultrafiltration; Microfiltration
    • B01D61/22—Controlling or regulating

Definitions

  • the invention relates to a cross-flow filtration method for separating liquid from a flowable medium, in which a material flow to be filtered and containing parts to be separated is required by means of a pump as retentate through a filtration module with porous membranes, the pump being a container, directly or indirectly is connected upstream for the flowable medium, and a system for its implementation
  • Such methods are used in plants which separate solid-liquid mixtures of porous memoranes and solid and liquid components.
  • the liquid components penetrate the membranes as permeate, while the solid components are retained as retentate.
  • the goal of wastewater treatment is the production of fresh water, which should be separated as far as possible from the contaminants.
  • fruit juice production the fruit juice should be separated from the pulp of the fruit mash
  • a process for thickening solid / liquid mixtures using a system with membrane modules Retentate cycle is known from EP 0,682,559 B1 (Bucher-Guyer).
  • the retentate flow in the membrane modules is kept almost constant. If, due to the thickening process of the retentate, the inlet pressure into the membrane modules is a predetermined one
  • the inlet pressure is kept constant until a setpoint of the degree of thickening of the retentate is reached.
  • the thickened retentate is then removed from the circuit.
  • the object of the invention is to further develop the generic cross-flow filtration process in such a way that even retentates with high degrees of thickening can still be fed to the feed pump and functional interruptions can thus be avoided.
  • the cross-flow Filtration method of the type mentioned above in that the flowable medium in the container is subjected to a pressure such that the medium is fed to the inlet of the pump with a pressure which is in a range between approximately the ambient pressure of the
  • the container for the medium is a closed batch tank
  • the medium is returned as retentate in a system in a circuit and in batch mode to the closed batch tank and the medium in the batch
  • the tank is pressurized with a pressure gas.
  • FIG. 1 is a schematic representation of a cross-flow filtration system according to the invention
  • FIG. 2 shows a schematic representation of a further cross-flow filtration system according to the invention
  • 3 shows a diagram of a product container according to FIG. 1 with a gas pressure device, an eccentric screw pump and an agitator
  • FIG. 4 shows a variant of the product container according to FIG.
  • FIG. 5 shows a variant of the product container according to FIG. 4, the container having the shape of a cylinder with a horizontally mounted axis,
  • FIG. 6 shows a variant of the product container according to FIG.
  • FIG. 7 shows a variant of the system according to FIG. 1 with a retentate circuit, in which a feed pump for the product is arranged in the outlet of a filtration module,
  • FIG. 8 shows a diagram of a variant of a product container according to FIG. 1, in which a press plunger is fitted to increase the pressure of the product
  • FIG. 9 shows a variant of the product container according to FIG. 8 with a connected eccentric screw pump for the product
  • FIG. 10 shows a variant of the product container according to FIG.
  • Fig. 11 shows a variant of the system of FIG. 2, in which a gas pressure container for the product through a
  • FIG. 12 shows a variant of a product container for the system according to FIG. 2 with a built-in one Auger ,
  • FIG. 13 shows a variant of a product container for the system according to FIG. 2 with a built-in stirrer
  • FIG. 14 shows a variant of the system according to FIG. 1 with an internal product cycle.
  • this system comprises a container 1 for a product 2 which is to be filtered.
  • the product 2 is fed to a filtration module 5 in a manner known per se via a line 3 and a feed pump 4.
  • the filtration module 5 comprises porous membranes 6, which are used in microfiltration or ultrafiltration according to their separation limit. In the filtration module 5, the product is separated into a per eat as a filtrate and a retentate.
  • An outlet line 7 is provided for the permeate and an outlet line 8 for the retentate.
  • a radial pump 9 and a shut-off valve 10 Via the line 8, a radial pump 9 and a shut-off valve 10, the retentate returns to the container 1 with the product 2 ' , as a result of which a closed one is known Retentate cycle is given.
  • FIG. 1 there is a free space 11 in the container 1 above the product 2, to which a compressed gas can be supplied by means of a line 12 via a control valve 13.
  • a further line 14 is arranged on the container 1 for supplying the product 2.
  • an outlet valve 15 which branches off in front of the latter works with a subsequent retentate outlet line 16.
  • FIG. 1 also schematically shows control circuits for the gas pressure in the room 11 and the delivery capacities of the pumps 4 and 9.
  • the gas pressure in the room 11 is regulated via pressure sensors 17, 18 and the control valve 13.
  • the delivery rates of the pumps 4, 9 and thus the working pressure in the filtration module 5 are regulated via a flow sensor 19 and pressure sensors 20, 21.
  • FIG. 2 schematically shows a further cross-flow filtration system according to the invention, reference numerals according to FIG. 1 indicating components with a corresponding function.
  • Fig. 2 shows an open container 1 'for the product 2 to be filtered, which is supplied via a line 14 and discharged via a line 3.
  • the product 2 reaches the filtration module 5 via the feed pump 4.
  • the remaining retentate after separation of a permeate via line 7, is passed through an outlet line 8, a control valve 22 and the shut-off valve 10 into the open container 1 'returned.
  • the closed retentate cycle described so far is known per se.
  • the function of the closed container 1 according to FIG. 1 for increasing the pressure can be carried out in the system according to FIG. 2 by a separate closed and smaller pressure container 1 ′′.
  • the pressure container 1 ′′ is connected in parallel with the open container 1 ′ and connects the outlet line 8 of the filtration module 5 to the inlet of the feed pump 4 via the control valve 22, so that in a second operating mode the product 2 circulates solely in the retentate circuit via the pressure container 1 ′′ , in addition to the shut-off valve 10, a shut-off valve 23 is also mounted, with which the container 1 ' can be completely separated from the retentate cycle.
  • a further shut-off valve 24 or 25 is used at the inlet or at the outlet of the pressure vessel 1 ′′, which, together with the shut-off valves 10 and 23, enables switching between the above-mentioned operating modes.
  • 1 is equipped with a control valve 13 'for the pressure of a compressed gas supplied via a line 12 and arranged above the product 2 and a feed pump 26 for supplying the retentate.
  • a supply line 28 for rinsing water is arranged between the pressure vessel 1 ′′ and the feed pump 4 via a shut-off valve 27. This means that after the filtration of a batch in batch operation, the thickened retentate can be expelled via the outlet line 16.
  • a control circuit is also provided in the system according to FIG. 2, which regulates the delivery rate of the pump 4, the control valve 22 and thus the working pressure in the filtration module 5 via pressure sensors 20, 21 and the flow sensor 19. 2, the product 2 is therefore fed to the inlet of the feed pump 4 with the pressure generated in the pressure vessel 1 ′′.
  • This pressure like the corresponding pressure in the system according to FIG. 1, lies between the pressure of the filtration module 5 and the outlet pressure of the feed pump
  • FIG. 3 shows a schematic of a closed system with an open batch tank 1 'with the pressure tank 1''.
  • the first operating mode it is moved over the open container 1 'until the delivery problems of the delivery pump 4 occur as a result of the retentate thickening.
  • the second operating mode via the smaller pressure vessel 1 '', smaller batches are then continued in batch mode to higher degrees of thickening. Inexpensive radial pumps as feed pumps 4 are sufficient for this.
  • Fig. 3 shows a schematic of a closed
  • Product container 1 which can be used instead of the container 1 according to FIG. 1.
  • This product container 1 also has a line 12 for supplying a compressed gas and a line 8 for returning the retentate.
  • the feed pump 4 according to FIG. 1 is designed here as an eccentric screw pump 4 'and connected directly to the outlet of the product container 1.
  • An agitator 30 with a connected screw conveyor 31 in the container 1 additionally facilitates the conveyance of the retentate 2 to the filtration module 5 according to FIG. 1.
  • FIG. 4 shows a variant of the product container 1 according to FIG. Here is the space for the compressed gas from the
  • the press bellows 35 is fastened and designed in the product container 1 in such a way that the division into the partial spaces for compressed gas and product can vary within wide limits.
  • the direction of rotation of the feed pump 4 ' is reversed with respect to the arrangement according to FIG. 3 in order to make its screw 36 usable for the intake of the product 2 at the same time.
  • FIG. 5 shows a variant of the product container 1 according to FIG. 4.
  • the container 1 has the shape of a cylinder and is mounted horizontally with its axis. Accordingly, the separating bellows 35 ′′ is attached to the wall of the cylinder along a line which lies in a horizontal plane in which the cylinder axis also lies.
  • FIG. C shows a variant of the product container 1 according to FIG. 3, in which, however, the feed pump 4 'with the screw 36 connects directly to the outlet of the container 1, similarly to the embodiment according to FIG. 4.
  • the screw conveyor 31 and the agitator 30 according to FIG. 3 are dispensed with.
  • FIG. 7 schematically shows a variant of the system according to FIG. 1. In this variant, a radial pump 9 is only sufficient in the outlet line 8 of the membrane module 5 to convey the retentate 2 in a circuit with the lines 3 and 8
  • Container 1 by the compressed gas from line 12 is sufficient to avoid delivery problems at the entrance of the single delivery pump 9.
  • a product container 1 ′′ ′′ can be used in this system according to FIG. 8.
  • the product container 1 ′′ ′′ has a fitted press piston 40 neost means 41 for its operation.
  • the return line 8 for the retentate is expediently movable in this case and passed through the plunger 40
  • FIG. 9 shows a variant of the product container 1 ′′ ′′ according to FIG. 8 with a connected eccentric screw pump 4 ′ for the product 2.
  • the piston 40 here has a ring 42 for better sealing. In the position shown with broken lines, the piston 40 has already displaced part of the product 2 to the filtration module 5 according to FIG. 1 um, which line 7 has not been completely returned through the line 8 due to the loss of filtrate.
  • FIG. 10 shows a variant of the product age 1 ′′ ′′ according to FIG. 9 with a widened egg feed for the eccentric screw pump 4 ′. This allows heavily thickened products to be drawn in with less pressure than with a product holder according to FIG. 9.
  • FIG. 11 shows a variant of the system according to FIG. 2, in which the gas pressure container 1 ′′ for the product 2 is replaced by a pressure vessel 45 with a pressure piston 46.
  • a retrofit of a known system with an open batch tank 1 'with a pressure vessel 45 can be carried out with even less effort be connected as a retrofit according to FIG. 2.
  • FIG. 12 shows a variant of a product container 1 ′ for the system according to FIG. 2 with a built-in screw conveyor 50.
  • a screw conveyor 50 is sufficient to ensure the product intake of a downstream feed pump 4 according to FIG. 2 ,
  • FIG. 13 shows a variant of a product container 1 'for the system according to FIG. 2. Similar to the variant according to FIG. 3, the one according to FIG. 13 has a built-in agitator 30. However, the eccentric screw pump 4' is simple in that Output of the product container 1 'built-in screw conveyor 50' replaced, which is sufficient for simple cases.
  • FIG. 14 shows a variant of the system according to FIG. 1, with an internal product cycle.
  • the gas pressure in the free space 11 of the container 1 enables the feed pump 4 to work without problems.
  • a control valve 22 with a pressure sensor 20 operates in a manner similar to the variant according to FIG together.
  • An inner product circuit is now provided by a second feed pump 51 and a retentate return 52 from the control valve 22 to the inlet of the feed pump 51.
  • the outer circuit works via the container 1, line 3, filtration module 5, line 8 and shut-off valve 10 and the inner circuit via the
  • Retentate return 52, feed pump 51, filtration module 5 and line 8 simultaneously. While a relatively large flow of 3 e.g. 30 m / h is running, only a small amount of container 3 is required
  • Product flow of 1.5 m / h, for example are supplied, which corresponds to the permeate discharge via line 7. If the container 1 is at a distance from the filtration module 5 arranged, only the small product flow advantageously has to run over this distance, the larger flow circulates only in the relatively short inner circuit via the retentate return 52.

Landscapes

  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Nutrition Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Food Science & Technology (AREA)
  • Polymers & Plastics (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)

Abstract

Installation de filtration à courant transversal comprenant un module de filtration (5), un réservoir (1) pour le milieu à filtrer (2) et une pompe de circulation (4) montée entre le réservoir (1) et le module de filtration, dans laquelle le milieu (2) dans le réservoir (1) est amené sous une pression élevée au moyen d'un gaz comprimé ou de dispositifs appropriés. Grâce à l'invention, des milieux (2), même fortement épaississants peuvent être amenés à la pompe de circulation (4), ce qui permet d'éviter des interruptions de fonctionnement de l'installation.
EP00947732A 1999-08-26 2000-08-08 Procede de filtration a courant transversal et installation pour sa mise en oeuvre Withdrawn EP1144093A3 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH156199 1999-08-26
CH156199 1999-08-26
PCT/CH2000/000422 WO2001015797A2 (fr) 1999-08-26 2000-08-08 Procede de filtration a courant transversal et installation pour sa mise en oeuvre

Publications (2)

Publication Number Publication Date
EP1144093A2 true EP1144093A2 (fr) 2001-10-17
EP1144093A3 EP1144093A3 (fr) 2002-09-11

Family

ID=4213303

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00947732A Withdrawn EP1144093A3 (fr) 1999-08-26 2000-08-08 Procede de filtration a courant transversal et installation pour sa mise en oeuvre

Country Status (4)

Country Link
EP (1) EP1144093A3 (fr)
JP (1) JP2003508194A (fr)
CA (1) CA2347375A1 (fr)
WO (1) WO2001015797A2 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PL370708A1 (en) * 2002-04-10 2005-05-30 Bucher-Guyer Ag Cross-flow filtration installation
IL157430A (en) * 2003-08-17 2009-08-03 Avi Efraty Apparatus for continuous closed circuit desalination under variable pressure with a single container
JP4968573B2 (ja) * 2005-10-26 2012-07-04 和之 小川 限外濾過装置の運転方法
JP4840974B2 (ja) * 2006-03-24 2011-12-21 カゴメ株式会社 逆浸透濃縮方法
AT510896B1 (de) * 2009-01-15 2013-08-15 Kurt Himmelfreundpointner Verfahren und vorrichtung für das fördern von förderfähigen materialien
JP5256458B2 (ja) * 2010-09-21 2013-08-07 Ｎｓｓｌ株式会社 高粘度材料の循環ろ過分離方法、並びに、これを用いた循環ろ過分離装置
EP2644258A1 (fr) 2012-03-29 2013-10-02 Roche Diagniostics GmbH Système de filtration à micro-écoulement et procédé de filtration d'écoulement pour un échantillon de fluide
EP2644259A1 (fr) * 2012-03-29 2013-10-02 Roche Diagniostics GmbH Système de filtration à micro-écoulement et procédé de filtration d'écoulement

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02184328A (ja) * 1989-01-11 1990-07-18 Shonan Koryo Kk 膜処理装置
CH687055A5 (de) * 1993-12-03 1996-09-13 Bucher Guyer Ag Masch Verfahren und Vorrichtung zum Eindicken von Fest/Fluessig-Gemischen mittels Membrantechnologie.
FR2774309B1 (fr) * 1998-01-30 2000-04-21 Bernard Marinzet Procede et installation de filtration d'un liquide utilisant un dispositif de filtration a membrane

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0115797A3 *

Also Published As

Publication number Publication date
WO2001015797A2 (fr) 2001-03-08
JP2003508194A (ja) 2003-03-04
CA2347375A1 (fr) 2001-03-08
WO2001015797A3 (fr) 2001-09-27
EP1144093A3 (fr) 2002-09-11

Similar Documents

Publication Publication Date Title
EP0682559B1 (fr) Procede et dispositif de concentration de melanges solides/liquides selon une technologie faisant appel a des membranes
EP0771231B1 (fr) Procede et installation de filtration a courant transversal pour separer un liquide d'une substance coulante
EP1715764B1 (fr) Procede de diafiltration d'un produit, et dispositif pour la mise en oeuvre de ce procede
DE3224706A1 (de) Verfahren zur herstellung alkoholfreier, insbesondere kohlensaeurehaltiger erfrischungsgetraenke, sowie einrichtung zur durchfuehrung des verfahrens
EP2401062A1 (fr) Procédé et dispositif de filtration
CH664068A5 (de) Verfahren zur gewinnung von fluessigkeit aus bei der entsaftung landwirtschaftlicher produkte anfallenden rueckstaenden und vorrichtungen zur durchfuehrung desselben.
DE2229847A1 (de) Verfahren und vorrichtung zum reinigen der filterbetten einer filtervorrichtung mit mehreren filtereinheiten
DE60103845T2 (de) Verfahren und Anlage zur Konzentration verarbeiteter Gemüse- und Obstprodukte durch Umkehrosmose
EP1144093A2 (fr) Procede de filtration a courant transversal et installation pour sa mise en oeuvre
WO2000012199A1 (fr) Procede permettant de separer par filtration transversale un melange en une fraction solide et une fraction liquide
EP0353422B1 (fr) Procédé et appareil de filtration
EP2905067A1 (fr) Dispositif de filtration de courant transversal dynamique destiné à filtrer une suspension de matière solide-liquide et son procédé de fonctionnement
EP0735916A1 (fr) Procede et dispositif permettant de concentrer des melanges solides/liquides a l'aide de la technologie des membranes
EP1242159A1 (fr) Procede et dispositif pour amener des agents auxiliaires de filtration et/ou des substances auxiliaires techniques pendant la filtration
EP1757356A1 (fr) Appareil de filtration avec dispositif de pompage
EP1011852A1 (fr) Procede et dispositif pour melanger des fluides dans une conduite
DE3807258A1 (de) Verfahren und vorrichtung zum filtrieren von fluessigen medien
EP0747111A1 (fr) Procédé pour augmenter la performance de filtration des filtres à courant transversal dans les modules des installations de filtration
EP3469331A1 (fr) Dispositif d'échantillonnage permettant le prélèvement d'échantillons de boisson d'une conduite de boisson, laquelle contient une boisson gazeuse pressurisée
DE19625462A1 (de) Verfahren und Vorrichtung zum Befüllen einer Dichtstrom-Förderleitung
DE945755C (de) Vorrichtung zum kontinuierlichen Verloesen von natuerlich vorkommenden Salzen, insbesondere Kaliumchloridmineralien
EP0904702A2 (fr) Appareil et procédé pour concentrer de jus de fruits et de vegetables
DE3126801A1 (de) Verfahren und vorrichtung zum beschicken von druckfiltrationsanlagen mit schlaemmen
DE2523855A1 (de) Gaskompressionsverfahren und vorrichtung zur durchfuehrung desselben
DE2904351C2 (de) Vorrichtung zum Trennen weinsäurehaltiger Produkte von Weinsäuresalzkristallen.

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20010407

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

XX Miscellaneous (additional remarks)

Free format text: DERZEIT SIND DIE WIPO-PUBLIKATIONSDATEN A3 NICHT VERFUEGBAR.

PUAK Availability of information related to the publication of the international search report

Free format text: ORIGINAL CODE: 0009015

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

17Q First examination report despatched

Effective date: 20030728

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20031209