EP0766753B1 - Procede pour decharger une suspension cellulosique d'un tonneau - Google Patents

Procede pour decharger une suspension cellulosique d'un tonneau Download PDF

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Publication number
EP0766753B1
EP0766753B1 EP96905590A EP96905590A EP0766753B1 EP 0766753 B1 EP0766753 B1 EP 0766753B1 EP 96905590 A EP96905590 A EP 96905590A EP 96905590 A EP96905590 A EP 96905590A EP 0766753 B1 EP0766753 B1 EP 0766753B1
Authority
EP
European Patent Office
Prior art keywords
suspension
vessel
cellulose
mass
discharging
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.)
Revoked
Application number
EP96905590A
Other languages
German (de)
English (en)
Other versions
EP0766753A1 (fr
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
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=3499131&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0766753(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Lenzing AG, Chemiefaser Lenzing AG filed Critical Lenzing AG
Publication of EP0766753A1 publication Critical patent/EP0766753A1/fr
Application granted granted Critical
Publication of EP0766753B1 publication Critical patent/EP0766753B1/fr
Anticipated expiration legal-status Critical
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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 discharging a Suspension of cellulose in an aqueous tertiary Amine oxide from a vessel.
  • amine oxide primarily used N-methylmorpholine-N-oxide (NMMO).
  • 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 cellulosic shaped body using tertiary amine oxides is commonly referred to as the amine oxide process.
  • EP-A-0 356 419 describes an amine oxide process Preparation of spinnable cellulose solutions described, which as starting material a suspension of cellulose in liquid, aqueous N-methylmorpholine-N-oxide (NMMO) used.
  • NMMO N-methylmorpholine-N-oxide
  • This method consists in that the suspension in one Thin film treatment apparatus in one step and continuously in a malleable solution is transferred. The malleable solution is finally in a mold, e.g. a spinneret, spun into filaments that passed through a precipitation bath become.
  • cellulose solution serves as a suspension of Cellulose in aqueous tertiary amine oxide. This suspension is made by crushing cellulose into the aqueous Amine oxide solution is introduced. Then this Suspension, optionally after another Homogenization, transferred to the cellulose solution, for what suitably a thin film treatment apparatus, e.g. a Film truder from Buss AG, Switzerland, is used. in the Thin film treatment apparatus become those Concentration ratios set it according to the State diagram for the ternary mixture of substances Allow cellulose / amine oxide / water (see e.g. WO 94/28212), that the cellulose dissolves.
  • a thin film treatment apparatus e.g. a Film truder from Buss AG, Switzerland
  • the amine oxide process can be carried out the better, depending the cellulose suspension is metered more precisely. Due to the The consistency of the suspension is a regulation of the flow such a suspension, e.g. from a vessel into a thin film treatment apparatus, for the purpose of Amine oxide process inaccurate. With conventional Mass flow meters, e.g. inductive flow meters or measuring devices that use the Coriolis measuring principle a precise control of the suspension flow or a exact dosage due to inhomogeneities, air bubbles etc. the cellulose suspension is not possible.
  • the invention therefore has as its object a method for To make available, which the solution formation in Thin film treatment apparatus and the amine oxide process improved.
  • This object is achieved by a method for discharging a suspension of crushed cellulose in a liquid, aqueous tertiary amine oxide from a vessel, wherein the weight of the vessel containing the suspension is measured and with the Deviations in the weight of the vessel from a predetermined target value of the discharge the suspension is regulated from the vessel.
  • a cradle feeder which is used to feed fluid-like substances are used.
  • the device has a container for the Substance, a device for unloading the substance from the container with a controllable Rate, a device for weighing the container and an electronic device for Control of unloading.
  • a device for regulating the Discharge and flow of an inhomogeneous suspension of cellulose from a vessel nothing is known.
  • a cellulose suspension which has the following composition can be controlled particularly well with the method according to the invention: Cellulose 12 to 15 mass%; water 18 to 25 mass%; tertiary amine oxide 60 to 65 mass%. where the mass% are based on the total mass of the suspension.
  • a preferred embodiment of the invention The process consists of using a pump as the vessel with a connected storage container.
  • the experimental apparatus consisted essentially of one Reservoir, an eccentric screw pump of the type Netzsch Mohno 2NSP30, with which a cellulose suspension from the Storage container in a thin film treatment apparatus a scale (pressure load load cell, manufacturer: Phillips Wägetechnik GmbH, Hamburg, Germany) and one electronic control device with which the pump power was controlled depending on the weighing result.
  • a scale pressure load load cell, manufacturer: Phillips Wägetechnik GmbH, Hamburg, Germany
  • the reservoir and the eccentric screw pump were located on the scale with which the total weight of the Storage container with attached worm pump and velvet contained cellulose suspension was measured.
  • the line with which cellulose suspension from the Storage container conveyed into the thin film treatment apparatus was, of course, made of flexible material, so that Weighing result was not affected.
  • the cellulose suspension had the following composition: Cellulose: 12.5% by mass; N-methylmorpholine-N-oxide: 63.5 mass%; Water: 24.0 mass%, based on the total mass.
  • the electronic control device was programmed so that it should control the pump output so that the scale one attributable to the pumped-out cellulose suspension Weight loss of as much as 300 kg / h registered.
  • 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 was also adjusted as far as possible Should regulate 300 kg / h.
  • a conventional inductive flow meter type PROMAG, manufacturer Endress and Hauser
  • Suspension flow invention 1 248 291 2nd 236 294 3rd 223 300 4th 240 303 5 219 300 6 246 291 7 261 300 8th 245 304 9 221 298 10th 232 301 11 258 303 12th 234 297 13 219 291 14 238 303 15 226 293 16 240 300 17th 270 304 18th 224 303 Average: 237.78 298.67 Standard deviation: 14.96 4.72
  • the table shows that a more precise control or regulation of the suspension flow is possible than with the inductive flow meter can be achieved.

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)
  • Artificial Filaments (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)
  • Polymerisation Methods In General (AREA)
  • Moulding By Coating Moulds (AREA)

Claims (3)

  1. Procédé pour décharger d'un récipient une suspension de cellulose désintégrée dans un oxyde d'amine tertiaire aqueux liquide, caractérisé en ce que le poids du récipient contenant la suspension est mesuré et la décharge de la suspension hors du récipient est ajustée par les écarts du poids du récipient par rapport à une valeur de consigne prédéterminée.
  2. Procédé selon la revendication 1, caractérisé en ce que la suspension présente la composition suivante : Cellulose 12 à 15 % en masse, Eau 18 à 25 % en masse, Oxyde d'amine tertiaire 60 à 65 % en masse,
    les pourcentages en masse étant en relation avec la masse totale de la suspension.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce qu'une pompe avec un réservoir de stockage raccordé est utilisée comme récipient.
EP96905590A 1995-05-04 1996-03-25 Procede pour decharger une suspension cellulosique d'un tonneau Revoked EP0766753B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
AT763/95 1995-05-04
AT76395 1995-05-04
AT0076395A AT405576B (de) 1995-05-04 1995-05-04 Verfahren zum kontrollieren einer fliessenden cellulosesuspension
PCT/AT1996/000060 WO1996035008A1 (fr) 1995-05-04 1996-03-25 Procede permettant de controler une suspension cellulosique coulante

Publications (2)

Publication Number Publication Date
EP0766753A1 EP0766753A1 (fr) 1997-04-09
EP0766753B1 true EP0766753B1 (fr) 1999-08-11

Family

ID=3499131

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96905590A Revoked EP0766753B1 (fr) 1995-05-04 1996-03-25 Procede pour decharger une suspension cellulosique d'un tonneau

Country Status (10)

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

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5603884A (en) * 1994-11-18 1997-02-18 Viskase Corporation Reinforced cellulosic film
US6471727B2 (en) 1996-08-23 2002-10-29 Weyerhaeuser Company Lyocell fibers, and compositions for making the same
US6331354B1 (en) 1996-08-23 2001-12-18 Weyerhaeuser Company Alkaline pulp having low average degree of polymerization values and method of producing the same
US6306334B1 (en) 1996-08-23 2001-10-23 The Weyerhaeuser Company Process for melt blowing continuous lyocell fibers
US6210801B1 (en) 1996-08-23 2001-04-03 Weyerhaeuser Company Lyocell fibers, and compositions for making same
US6208877B1 (en) * 1997-07-03 2001-03-27 Ericsson, Inc. Methods and apparatus for selectively displaying information entered from a radiotelephone keypad
US6773648B2 (en) 1998-11-03 2004-08-10 Weyerhaeuser Company Meltblown process with mechanical attenuation
DE50005098D1 (de) * 1999-10-06 2004-02-26 Zimmer Ag Verfahren und vorrichtung zur regelung der zusammensetzung der cellulosehaltigen extrusionslösung bei dem lyocellprozess
WO2003005082A1 (fr) * 2001-07-02 2003-01-16 Acreo Ab Procede et dispositif permettant d'accorder des reseaux de bragg

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4054784A (en) * 1975-06-18 1977-10-18 Ricciardi Ronald J Weigh feeder system
US4111272A (en) * 1976-12-07 1978-09-05 Acrison, Incorporated Weigh feeding apparatus
USRE32102E (en) * 1976-04-19 1986-04-01 Acrison, Inc. Weigh feeding apparatus
US4210963A (en) * 1976-04-19 1980-07-01 Angelo Ferrara Weigh feeder system
CA1094039A (fr) * 1976-04-19 1981-01-20 Angelo Ferrara Systeme d'alimentation a debit commande automatiquement
USRE32101E (en) * 1976-12-07 1986-04-01 Acrison, Inc. Weigh feeding apparatus
NZ218558A (en) * 1985-12-19 1989-03-29 Csr Ltd Measuring flow rate of a fluid by a weight controlled through-flow container
AT392972B (de) * 1988-08-16 1991-07-25 Chemiefaser Lenzing Ag Verfahren zur herstellung von loesungen von cellulose sowie einrichtung zur durchfuehrung des verfahrens
AT396930B (de) * 1992-01-23 1993-12-27 Chemiefaser Lenzing Ag Aminoxide
US5354524A (en) * 1993-05-24 1994-10-11 Alan Sellars Monitoring concentration of dope in product manufacture
US5423456A (en) * 1994-01-03 1995-06-13 Larry V. Arendonk Apparatus for continuous flow weighing

Also Published As

Publication number Publication date
ATA76395A (de) 1999-01-15
US5582783A (en) 1996-12-10
DE59602706D1 (de) 1999-09-16
CA2192783A1 (fr) 1996-11-07
JPH10502978A (ja) 1998-03-17
BR9606356A (pt) 1997-12-23
NO965583D0 (no) 1996-12-27
EP0766753A1 (fr) 1997-04-09
AU696994B2 (en) 1998-09-24
ATE183252T1 (de) 1999-08-15
AU4931496A (en) 1996-11-21
WO1996035008A1 (fr) 1996-11-07
NO965583L (no) 1997-02-28
AT405576B (de) 1999-09-27

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