EP0766753A1 - Process for monitoring a flowing cellulose suspension - Google Patents

Process for monitoring a flowing cellulose suspension

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Publication number
EP0766753A1
EP0766753A1 EP96905590A EP96905590A EP0766753A1 EP 0766753 A1 EP0766753 A1 EP 0766753A1 EP 96905590 A EP96905590 A EP 96905590A EP 96905590 A EP96905590 A EP 96905590A EP 0766753 A1 EP0766753 A1 EP 0766753A1
Authority
EP
European Patent Office
Prior art keywords
suspension
vessel
cellulose
ingots
amine oxide
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.)
Granted
Application number
EP96905590A
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German (de)
French (fr)
Other versions
EP0766753B1 (en
Inventor
Stefan Zikeli
Ulrich Möderl
Friedrich Ecker
Franz Schwenninger
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.)
Lenzing AG
Original Assignee
Lenzing AG
Chemiefaser Lenzing AG
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Application filed by Lenzing AG, Chemiefaser Lenzing AG filed Critical Lenzing AG
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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D1/00—Treatment of filament-forming or like material
    • D01D1/06—Feeding liquid to the spinning head
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F2/00—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof

Definitions

  • the invention relates to a method for controlling a flowing suspension of cellulose in an aqueous tertiary amine oxide.
  • checking is also to be understood as measuring and regulating.
  • NMMO N-Methylmorpholine-N-oxide
  • Other amine oxides are e.g. in EP-A - 0 533 070.
  • a method of making moldable cellulose solutions is e.g. known from EP-A-0 356 419.
  • the production of cellulosic moldings using tertiary amine oxides is generally referred to as the amine oxide process.
  • EP-A-0 356 419 describes an amine oxide process for the preparation of spinnable cellulose solutions which, among other things, comprises a suspension of cellulose as a starting material liquid, aqueous N-methylmorpholine-N-oxide (NMMO) used.
  • NMMO N-methylmorpholine-N-oxide
  • This method consists in the suspension being continuously and continuously converted into a moldable solution in a thin-film treatment apparatus.
  • the moldable solution is finally spun in a molding tool, for example a spinneret, into filaments which are passed through a precipitation bath.
  • a suspension of cellulose in the aqueous tertiary amine oxide serves as the starting material for the production of the moldable cellulose solution.
  • This suspension is produced by introducing crushed cellulose into the aqueous amine oxide solution.
  • This suspension is then, if appropriate after further homogenization, transferred to the cellulose solution, for which purpose a thin-film treatment apparatus, e.g. a film truder from Buss AG, Switzerland, is used.
  • a thin-film treatment apparatus e.g. a film truder from Buss AG, Switzerland, is used.
  • the concentration ratios are set which are according to the state diagram for the ternary mixture of substances
  • Cellulose / amine oxide / water allow the cellulose to dissolve.
  • the object of the invention is therefore to provide a method with which a flow of a suspension can be better controlled by crushed cellulose than is possible in the prior art.
  • the process according to the invention for controlling the flow of a suspension of comminuted cellulose in a liquid, aqueous tertiary amine oxide is characterized by the combination of the measures that
  • Cellulose 12 to 15 mass .
  • mass% are based on the total mass of the suspension.
  • a preferred embodiment of the method according to the invention is that a pump or another conveying device is used as the vessel.
  • a buffer container is used as the vessel.
  • Combinations of a buffer tank with a pump or conveying device have also proven to be expedient.
  • the test apparatus essentially consisted of a storage container, an eccentric screw pump of the type Netzsch Mohno 2NSP30, with which a cellulose suspension was conveyed from the storage container into a thin-film treatment apparatus, a balance (pressure load load cell, manufacturer: Phillips Wägetechnik GmbH, Hamburg, Germany) and an electronic one Control device with which the pump power was controlled depending on the weighing result.
  • the storage container and the eccentric screw pump were located on the scales with which the total weight of the storage container with attached screw pump and the cellulose suspension contained was measured.
  • the line with which cellulose suspension was conveyed from the storage container into the thin-film treatment apparatus was naturally made of flexible material, so that the weighing result was not impaired.
  • the cellulose suspension had the following composition: cellulose: 12.5 ingots; N-methylmorpholine-N-oxide: 63.5 ingots; Water: 24.0 pounds, based on the total mass.
  • the electronic control device was programmed in such a way that it should control the pump output in such a way that the balance registers a weight loss of 300 kg / h as precisely as possible which is attributable to the pumped-out cellulose suspension.
  • the cellulose suspension was pumped out of the same storage vessel with the same pump, but the pump output was not regulated according to the invention, but with a conventional inductive flow meter (type PROMAG, manufacturer Endress and Hauser), which was connected downstream of the pump and the pump output as well as possible Should regulate 300 kg / h. 18 measured values (suspension flow in kg / h) were recorded at intervals of 15 seconds, which are given in the table below in the column "suspension flow IDM".
  • the table shows that, according to the invention, a more precise control or regulation of the suspension flow is possible than can be achieved with the inductive flow meter.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Paper (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • General Preparation And Processing Of Foods (AREA)
  • Moulding By Coating Moulds (AREA)
  • Artificial Filaments (AREA)
  • Polymerisation Methods In General (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)

Abstract

The invention is concerned with a process for controlling a flowing suspension of shredded cellulose in a liquid, aqueous tertiary amine-oxide and is characterized by the combination of measures that (A) the suspension is introduced into a vessel having an inlet for the suspension, (B) the suspension introduced into the vessel is transported through the vessel and (C) the suspension transported throught the vessel is discharged from the vessel by means of an outlet, (D) the weight of the vessel being measured and the introduction and discharging of the suspension being controlled by means of deviations from a predetermined set value.

Description

Verfahren zum Kontrollieren einer fließenden Cellulose- suspensionMethod for controlling a flowing cellulose suspension
Die Erfindung betrifft ein Verfahren zum Kontrollieren einer fließenden Suspension von Cellulose in einem wäßrigen teriären Aminoxid. Der Begriff "Kontrollieren" soll für die Zwecke dieser Anmeldung auch als Messen und Regeln verstanden werden.The invention relates to a method for controlling a flowing suspension of cellulose in an aqueous tertiary amine oxide. For the purposes of this application, the term “checking” is also to be understood as measuring and regulating.
Seit einigen Jahrzehnten wird nach Verfahren zur Herstellung cellulosischer Formkörper gesucht- welche das heute in großem Maßstab angewendete Viskoseverfahren ersetzen sollen. Als eine nicht zuletzt wegen einer besseren Umweltverträglichkeit interessante Alternative hat sich dabei herauskristallisiert, Cellulose ohne Derivatisierung in einem organischen Lösungsmittel aufzulösen und aus dieser Lösung Formkörper, z.B. Fasern, Folien und anderen Formkörpern, zu extrudieren. Solcherart extrudierte Fasern erhielten von der BISFA (The International Bureau for the Standardization of man made fibers) den Gattungsnamen Lyocell. Unter einem organischen Lösungsmittel wird von der BISFA ein Gemisch aus einer organischen Chemikalie und Wasser verstanden.For several decades, methods for the production of cellulosic molded articles have been sought which are to replace the viscose process which is used today on a large scale. An alternative, not least because of its better environmental compatibility, has emerged in the process of dissolving cellulose in an organic solvent without derivatization and molding, e.g. Fibers, foils and other moldings to extrude. Such extruded fibers were given the generic name Lyocell by BISFA (The International Bureau for the Standardization of man made fibers). BISFA defines an organic solvent as a mixture of an organic chemical and water.
Es hat sich herausgestellt, daß sich als organisches Lösungsmittel insbesondere ein Gemisch aus einem tertiären Aminoxid und Wasser sehr gut zur Herstellung von cellulosischen Formkörpern eignet. Als Aminoxid wird dabei in erster Linie N-Methylmorpholin-N-oxid (NMMO) verwendet. Andere Aminoxide sind z.B. in der EP-A - 0 533 070 beschrieben. Ein Verfahren zur Herstellung formbarer Celluloselösungen ist z.B. aus der EP-A - 0 356 419 bekannt. Die Herstellung cellulosischer Formkörper unter Anwendung tertiärer Aminoxide wird allgemein als Aminoxidverfahren bezeichnet.It has been found that a mixture of a tertiary amine oxide and water is particularly suitable as an organic solvent for the production of cellulosic moldings. N-Methylmorpholine-N-oxide (NMMO) is primarily used as the amine oxide. Other amine oxides are e.g. in EP-A - 0 533 070. A method of making moldable cellulose solutions is e.g. known from EP-A-0 356 419. The production of cellulosic moldings using tertiary amine oxides is generally referred to as the amine oxide process.
In der EP-A - 0 356 419 ist ein Aminoxidverfahren zur Herstellung spinnbarer Celluloselösungen beschrieben, welches als Ausgangsmaterial u.a. eine Suspension von Cellulose in flüssigem, wäßrigem N-Methylmorpholin-N-oxid (NMMO) verwendet. Dieses Verfahren besteht darin, daß die Suspension in einem Dünnschichtbehandlungsapparat einstufig und kontinuierlich in eine formbare Lösung übergeführt wird. Die formbare Lösung wird schließlich in einem Formwerkzeug, z.B einer Spinndüse, zu Filamenten versponnen, die durch ein Fällbad geführt werden.EP-A-0 356 419 describes an amine oxide process for the preparation of spinnable cellulose solutions which, among other things, comprises a suspension of cellulose as a starting material liquid, aqueous N-methylmorpholine-N-oxide (NMMO) used. This method consists in the suspension being continuously and continuously converted into a moldable solution in a thin-film treatment apparatus. The moldable solution is finally spun in a molding tool, for example a spinneret, into filaments which are passed through a precipitation bath.
Als Ausgangsmaterial für die Herstellung der formbaren Celluloselösung dient, wie oben erwähnt, eine Suspension von Cellulose im wäßrigen tertiären Aminoxid. Diese Suspension wird hergestellt, indem zerkleinerte Cellulose in die wäßrige Aminoxidlösung eingebracht wird. Anschließend wird diese Suspension, gegebenenfalls nach einer weiteren Homogenisierung, in die Celluloselösung übergeführt, wofür zweckmäßigerweise ein Dünnschichtbehandlungsapparat, z.B. ein Filmtruder der Firma Buss AG, Schweiz, verwendet wird. Im Dünnschichtbehandlungsapparat werden jene Konzentrationsverhältnisse eingestellt, die es gemäß dem Zustandsdiagramm für das ternäre StoffgemischAs mentioned above, a suspension of cellulose in the aqueous tertiary amine oxide serves as the starting material for the production of the moldable cellulose solution. This suspension is produced by introducing crushed cellulose into the aqueous amine oxide solution. This suspension is then, if appropriate after further homogenization, transferred to the cellulose solution, for which purpose a thin-film treatment apparatus, e.g. a film truder from Buss AG, Switzerland, is used. In the thin-film treatment apparatus, the concentration ratios are set which are according to the state diagram for the ternary mixture of substances
Cellulose/Aminoxid/Wasser (siehe z.B. WO 94/28212) gestatten, daß die Auflösung der Cellulose stattfindet.Cellulose / amine oxide / water (see e.g. WO 94/28212) allow the cellulose to dissolve.
Das Aminoxidverfahren kann umso besser durchgeführt werden, je genauer die Cellulosesuspension dosiert wird. Aufgrund der Konsistenz der Suspension ist aber eine Kontrolle des Flusses einer derartigen Suspension für die Zwecke des Aminoxidverfahrens ungenau. Mit herkömmlichen Massedurchflußmesser, wie z.B. induktiven Durchflußmessern oder Meßgeräten, die das Coriolis-Meßprinzip anwenden, ist eine genaue Kontrolle der fließenden Suspension bzw. eine genaue Dosierung wegen der Inhomogenitäten, Luftblasen etc. der Cellulosesuspension nicht möglich.The more precisely the cellulose suspension is metered, the better the amine oxide process can be carried out. Because of the consistency of the suspension, however, control of the flow of such a suspension is imprecise for the purposes of the amine oxide process. With conventional mass flow meters, e.g. Inductive flow meters or measuring devices that use the Coriolis measuring principle, a precise control of the flowing suspension or an exact dosage is not possible because of the inhomogeneities, air bubbles, etc. of the cellulose suspension.
Die Erfindung stellt sich daher die Aufgabe, ein Verfahren zur Verfügung zu stellen, mit welchem ein Fluß einer Suspension von zerkleinerter Cellulose besser kontrolliert werden kann, als dies im Stand der Technik möglich ist.The object of the invention is therefore to provide a method with which a flow of a suspension can be better controlled by crushed cellulose than is possible in the prior art.
Das erfindungsgemäße Verfahren zum Kontrollieren eines Flusses einer Suspension von zerkleinerter Cellulose in einem flüssigen, wäßrigen tertiären Aminoxid, ist gekennzeichnet durch die Kombination der Maßnahmen, daßThe process according to the invention for controlling the flow of a suspension of comminuted cellulose in a liquid, aqueous tertiary amine oxide is characterized by the combination of the measures that
(A) die Suspension in ein Gefäß mit einer Eintragsöffnung für die Suspension gefördert wird,(A) the suspension is conveyed into a vessel with an inlet opening for the suspension,
(B) die in das Gefäß eingebrachte Suspension durch das Gefäß transportiert wird, und(B) the suspension introduced into the vessel is transported through the vessel, and
(C) die durch das Gefäß transportierte Suspension über eine Austragsöffnung aus dem Gefäß ausgetragen wird, wobei(C) the suspension transported through the vessel is discharged from the vessel via a discharge opening, wherein
(D) das Gewicht des Gefäßes gemessen wird und mit den Abweichungen von einem vorherbestimmten Soll-Wert der Eintrag bzw. der Austrag der Suspension gesteuert werden.(D) the weight of the vessel is measured and the entry or the discharge of the suspension are controlled with the deviations from a predetermined target value.
Es hat sich gezeigt, daß mit dem erfindungsgemäßen Verfahren eine viel genauere Steuerung und Kontrolle des Suspensionsflusses möglich ist als mit herkömmlichen Durchflußmeßgeräten.It has been shown that with the method according to the invention a much more precise control and monitoring of the suspension flow is possible than with conventional flowmeters.
Mit dem erfindungsgemäßen Verfahren kann besonders gut der Fluß einer Cellulosesuspension kontrolliert werden, welche die folgende Zusammensetzung aufweist:The flow of a cellulose suspension which has the following composition can be controlled particularly well with the method according to the invention:
Cellulose: 12 bis 15 Masse.;Cellulose: 12 to 15 mass .;
Wasser: 18 bis 25 Massel; tertiäres Aminoxid: 60 bis 65 Massel.Water: 18 to 25 ingots; tertiary amine oxide: 60 to 65 ingots.
wobei die Masse% auf die Gesamtmasse der Suspension bezogen sind. Eine bevorzugte Ausführungsform des erfindungsgemäßen Verfahrens besteht darin, daß als das Gefäß eine Pumpe oder eine andere Fördervorrichtung eingesetzt wird.where the mass% are based on the total mass of the suspension. A preferred embodiment of the method according to the invention is that a pump or another conveying device is used as the vessel.
Eine weitere bevorzugte Ausführungsform des erfindungsgemäßen Verfahrens besteht darin, daß als das Gefäß ein Pufferbehälter eingesetzt wird. Auch Kombinationen eines Pufferbehälters mit einer Pumpe oder Fördervorrichtung haben sich als zweckmäßig erwiesen.Another preferred embodiment of the method according to the invention is that a buffer container is used as the vessel. Combinations of a buffer tank with a pump or conveying device have also proven to be expedient.
Mit dem folgendem Beispiel wird die Erfindung noch näher erläutert.The invention is explained in more detail with the following example.
Beispielexample
Die Versuchsapparatur bestand im wesentlichen aus einem Vorratsbehälter, einer Exzenterschneckenpumpe der Type Netzsch Mohno 2NSP30, mit welcher eine Cellulosesuspension aus dem Vorratsbehälter in einen Dünnschichtbehandlungsapparat gefördert wurde, einer Waage (Drucklast-Wägezelle, Hersteller: Phillips Wägetechnik GmbH, Hamburg, Deutschland) und einer elektronischen Regeleinrichtung, mit welcher die Pumpleistung in Abhängigkeit vom Wägeergebnis gesteuert wurde. Der Vorratsbehälter und die Exzenterschneckenpumpe befanden sich auf der Waage, mit welcher das Gesamtgewicht des Vorratsbehälters mit angebrachter Schneckenpumpe samt enthaltener Cellulosesuspension gemessen wurde.The test apparatus essentially consisted of a storage container, an eccentric screw pump of the type Netzsch Mohno 2NSP30, with which a cellulose suspension was conveyed from the storage container into a thin-film treatment apparatus, a balance (pressure load load cell, manufacturer: Phillips Wägetechnik GmbH, Hamburg, Germany) and an electronic one Control device with which the pump power was controlled depending on the weighing result. The storage container and the eccentric screw pump were located on the scales with which the total weight of the storage container with attached screw pump and the cellulose suspension contained was measured.
Die Leitung, mit welcher Cellulosesuspension aus dem Vorratsbehälter in den Dünnschichtbehandlungsapparat gefördert wurde, war naturgemäß aus flexiblem Material, sodaß das Wägeergebnis nicht beeinträchtigt wurde.The line with which cellulose suspension was conveyed from the storage container into the thin-film treatment apparatus was naturally made of flexible material, so that the weighing result was not impaired.
Die Cellulosesuspension wies folgende Zusammensetzung auf: Cellulose: 12,5 Massel; N-Methylmorpholin-N-oxid: 63,5 Massel; Wasser: 24,0 Massel, bezogen auf die Gesamtmasse. Die elektronische Regeleinrichtung wurde so programmiert, daß sie die Pumpenleistung derart steuern sollte, daß die Waage eine der abgepumpten Cellulosesuspension zuzuschreibenden Gewichtsabnahme von möglichst genau 300 kg/h registriert.The cellulose suspension had the following composition: cellulose: 12.5 ingots; N-methylmorpholine-N-oxide: 63.5 ingots; Water: 24.0 pounds, based on the total mass. The electronic control device was programmed in such a way that it should control the pump output in such a way that the balance registers a weight loss of 300 kg / h as precisely as possible which is attributable to the pumped-out cellulose suspension.
Zur Durchführung des Versuches wurde 18 mal die in jeweils 15 Sekunden von der Pumpe geförderte Cellulosesuspension gewogen und auf einen Suspensionsfluß der Dimension kg/h hochgerechnet. Die Ergebnisse sind in der nachfolgenden Tabelle in der Spalte "Suspensionsfluß Erfindung" angegeben.To carry out the experiment, the cellulose suspension conveyed by the pump in 15 seconds each was weighed 18 and extrapolated to a suspension flow of the kg / h dimension. The results are given in the table below in the column "Suspension flow invention".
Zum Vergleich wurde die Cellulosesuspension zwar mit der gleichen Pumpe aus dem gleichen Vorratsgefäß abgepumpt, die Pumpenleistung aber nicht erfindungsgemäß geregelt, sondern mit einem herkömmlichen induktiven Durchflußmesser (Type PROMAG, Hersteller Endress und Hauser), der der Pumpe nachgeschaltet war und die Pumpenleistung ebenfalls auf möglichst 300 kg/h regeln sollte. Es wurden in Zeitabständen von 15 Sekunden 18 Meßwerte (Suspensionsfluß in kg/h) aufgezeichnet, die in der nachfolgenden Tabelle in der Spalte "Suspensionsfluß IDM" angegeben sind.For comparison, the cellulose suspension was pumped out of the same storage vessel with the same pump, but the pump output was not regulated according to the invention, but with a conventional inductive flow meter (type PROMAG, manufacturer Endress and Hauser), which was connected downstream of the pump and the pump output as well as possible Should regulate 300 kg / h. 18 measured values (suspension flow in kg / h) were recorded at intervals of 15 seconds, which are given in the table below in the column "suspension flow IDM".
Tabelle ssung Nr. Suspensionsfluß Suspensions lußTable solution no. Suspension flow suspension solution
IDM ErfindungIDM invention
1 248 2911 248 291
2 236 2942,236,294
3 223 3003,223,300
4 240 3034,240,303
5 219 3005 219 300
6 246 2916,246,291
7 261 3007 261 300
8 245 3048 245 304
9 221 2989 221 298
10 232 30110 232 301
11 258 303 12 234 29711 258 303 12,234,297
13 219 29113 219 291
14 238 30314 238 303
15 226 29315 226 293
16 240 30016 240 300
17 270 30417 270 304
18 224 30318 224 303
Mittelwert : 237 , 78 298,67Mean: 237, 78 298.67
Standardabweichung : 14 , 96 4,72Standard deviation: 14, 96 4.72
Der Tabelle ist zu entnehmen, daß erfindungsgemäß eine genauere Kontrolle bzw. Regelung des Suspensionsflusses möglich ist, als dies mit dem induktiven Durchflußmesser erreicht werden kann. The table shows that, according to the invention, a more precise control or regulation of the suspension flow is possible than can be achieved with the inductive flow meter.

Claims

Patentansprüche:Claims:
1. Verfahren zum Kontrollieren einer fließenden Suspension von zerkleinerter Cellulose in einem flüssigen, wäßrigen tertiären Aminoxid, gekennzeichnet durch die Kombination der Maßnahmen, daß1. A method for controlling a flowing suspension of comminuted cellulose in a liquid, aqueous tertiary amine oxide, characterized by the combination of the measures that
(A) die Suspension in ein Gefäß mit einer Eintragsöffnung für die Suspension gefördert wird,(A) the suspension is conveyed into a vessel with an inlet opening for the suspension,
(B) die in das Gefäß eingebrachte Suspension durch das Gefäß transportiert wird, und(B) the suspension introduced into the vessel is transported through the vessel, and
(C) die durch das Gefäß transportierte Suspension über eine Austragsöffnung aus dem Gefäß ausgetragen wird, wobei(C) the suspension transported through the vessel is discharged from the vessel via a discharge opening, wherein
(D) das Gewicht des Gefäßes gemessen wird und mit den Abweichungen von einem vorherbestimmten Soll-Wert der Eintrag bzw. der Austrag der Suspension gesteuert werden.(D) the weight of the vessel is measured and the entry or the discharge of the suspension are controlled with the deviations from a predetermined target value.
Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Suspension, welche gemäß Maßnahme (A) in das Gefäß gefördert wird, folgende Zusammensetzung aufweist:Method according to claim 1, characterized in that the suspension which is conveyed into the vessel according to measure (A) has the following composition:
Cellulose: 12 bis 15 Massel;Cellulose: 12 to 15 ingots;
Wasser: 18 bis 25 Massel; tertiäres Aminoxid: 60 bis 65 Massel.Water: 18 to 25 ingots; tertiary amine oxide: 60 to 65 ingots.
wobei die Massel auf die Gesamtmasse der Suspension bezogen sind.where the ingots are based on the total mass of the suspension.
Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß als das Gefäß eine Pumpe eingesetzt wird. 4. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß als das Gefäß ein Pufferbehälter eingesetzt wird.Method according to claim 1 or 2, characterized in that a pump is used as the vessel. 4. The method according to claim 1 or 2, characterized in that a buffer container is used as the vessel.
5. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Gefäß eine Pumpe und einen Pufferbehälter umfaßt. 5. The method according to claim 1 or 2, characterized in that the vessel comprises a pump and a buffer container.
EP96905590A 1995-05-04 1996-03-25 Process for discharging a cellulose suspension from a vessel Revoked EP0766753B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
AT76395 1995-05-04
AT0076395A AT405576B (en) 1995-05-04 1995-05-04 METHOD FOR CONTROLLING A FLOWING CELLULOSE SUSPENSION
AT763/95 1995-05-04
PCT/AT1996/000060 WO1996035008A1 (en) 1995-05-04 1996-03-25 Process for monitoring a flowing cellulose suspension

Publications (2)

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EP0766753A1 true EP0766753A1 (en) 1997-04-09
EP0766753B1 EP0766753B1 (en) 1999-08-11

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US (1) US5582783A (en)
EP (1) EP0766753B1 (en)
JP (1) JPH10502978A (en)
AT (2) AT405576B (en)
AU (1) AU696994B2 (en)
BR (1) BR9606356A (en)
CA (1) CA2192783A1 (en)
DE (1) DE59602706D1 (en)
NO (1) NO965583L (en)
WO (1) WO1996035008A1 (en)

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NO965583D0 (en) 1996-12-27
US5582783A (en) 1996-12-10
AU696994B2 (en) 1998-09-24
DE59602706D1 (en) 1999-09-16
CA2192783A1 (en) 1996-11-07
AU4931496A (en) 1996-11-21
EP0766753B1 (en) 1999-08-11
JPH10502978A (en) 1998-03-17
WO1996035008A1 (en) 1996-11-07
NO965583L (en) 1997-02-28
ATE183252T1 (en) 1999-08-15
ATA76395A (en) 1999-01-15
AT405576B (en) 1999-09-27
BR9606356A (en) 1997-12-23

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