EP3472383A1 - Method for producing a fibrous material - Google Patents

Method for producing a fibrous material

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Publication number
EP3472383A1
EP3472383A1 EP17724804.4A EP17724804A EP3472383A1 EP 3472383 A1 EP3472383 A1 EP 3472383A1 EP 17724804 A EP17724804 A EP 17724804A EP 3472383 A1 EP3472383 A1 EP 3472383A1
Authority
EP
European Patent Office
Prior art keywords
chemicals
refiner
mixture
sodium sulfite
sodium bisulfite
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
EP17724804.4A
Other languages
German (de)
French (fr)
Other versions
EP3472383B1 (en
Inventor
Oleg Shagaev
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.)
Andritz AG
Original Assignee
Andritz 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 Andritz AG filed Critical Andritz AG
Publication of EP3472383A1 publication Critical patent/EP3472383A1/en
Application granted granted Critical
Publication of EP3472383B1 publication Critical patent/EP3472383B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C1/00—Pretreatment of the finely-divided materials before digesting
    • D21C1/04—Pretreatment of the finely-divided materials before digesting with acid reacting compounds
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/02—Pretreatment of the raw materials by chemical or physical means
    • D21B1/021—Pretreatment of the raw materials by chemical or physical means by chemical means
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
    • D21B1/14—Disintegrating in mills
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/04—Pulping cellulose-containing materials with acids, acid salts or acid anhydrides
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/04—Pulping cellulose-containing materials with acids, acid salts or acid anhydrides
    • D21C3/06—Pulping cellulose-containing materials with acids, acid salts or acid anhydrides sulfur dioxide; sulfurous acid; bisulfites sulfites
    • D21C3/12—Pulping cellulose-containing materials with acids, acid salts or acid anhydrides sulfur dioxide; sulfurous acid; bisulfites sulfites sodium bisulfite
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/22—Other features of pulping processes
    • D21C3/26—Multistage processes
    • D21C3/266—Multistage processes the same pulping agent being used in all stages
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/001—Modification of pulp properties
    • D21C9/007—Modification of pulp properties by mechanical or physical means
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D1/00—Methods of beating or refining; Beaters of the Hollander type
    • D21D1/20—Methods of refining

Definitions

  • the invention relates to a process for the production of fibrous lignocellulose from wood, preferably in the form of wood chips, wherein the lignocellulosic material is impregnated by chemicals from a mixture of sodium sulfite and sodium bisulfite and then subjected to a crushing process in a refiner.
  • Methods for producing high yield pulp are e.g. known from CA 1051618.
  • Bisulfite can be used in the pretreatment stage but also in the
  • Free S0 2 can also condense with water vapor and produce corrosion on colder parts of the apparatus. At the higher pH
  • Refining plates come through calcium salts. At lower pH values can be
  • the aim of the invention is to avoid corrosion on the one hand and formation of deposits on the refiner plates on the other. This is achieved by additionally introducing chemicals from a mixture of sodium sulfite and sodium bisulfite directly into the refiner. This allows the conditions of addition to the impregnation and in the refiner
  • An advantageous development of the invention is characterized in that the chemicals with a pH of 6.0 to 7.5, preferably from 6.5 to 7.0, are fed to the impregnation. This can be done with the corrosion
  • a favorable embodiment of the invention is characterized in that the chemicals having a pH of 4.0-5.5, preferably 4.2-4.5, are added to the refiner. This allows the formation of deposits on the refiner plates can be greatly reduced or avoided, thereby significantly extending the life of the plates, resulting in enormous cost savings. Also, the salt formation, in particular of calcium salts, thereby substantially avoided.
  • An advantageous embodiment of the invention is characterized in that 60-80% of the chemicals are added to the impregnation and 20-40% of the chemicals in the refiner. This is a particularly good utilization of
  • a favorable development of the invention is characterized in that the impregnation is carried out at a temperature of 80-170 ° C, preferably 130-140 ° C. In this temperature range, a particularly good and rapid implementation of the chemicals can be achieved.
  • a favorable development of the invention is characterized in that the total amount of chemicals added is 1-20 kg / t, preferably 10-15 kg / t. Thus, the specific energy consumption of the process, in particular the comminution in the refiner, can be significantly reduced.
  • FIG. A flow diagram of a pretreatment plant with impregnation
  • the FIGURE shows an example of a system circuit according to the invention.
  • woodchips which may already be pretreated, fed to a reactor 2 for impregnation.
  • a chemical This is a mixture of sodium sulfite and sodium bisulfite.
  • the chemical supplied here has a pH of about 6.5-7.0 and is about 60-80% of the total amount of chemicals to be added. It has been shown that at a pH of 6.5 - 7.0 already 60 - 80% of the reaction after a short time, often after a few
  • the pH can be 6.0
  • the remaining amount of about 20-40% of the chemicals which in turn consist of a mixture of sodium sulfite and sodium bisulfite, is fed in via a line 6.
  • the chemicals which in turn consist of a mixture of sodium sulfite and sodium bisulfite
  • the pH here can be 4.0-5.5. This results in the crushing zone, a pH value, the deposits and coating on the refining plates, in particular of calcium sulfide prevented.
  • the invention is not limited to the examples described. It can be used for both hardwood and softwood.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Paper (AREA)

Abstract

The invention relates to a method for producing a fibrous material from lignocellulose from wood, preferably in the form of wood chips. The lignocellulose material is impregnated with a mixture of sodium sulfite and sodium bisulfite and subsequently undergoes a comminution process in a refiner. The invention is characterized primarily in that additionally chemicals from a mixture of sodium sulfite and sodium bisulfite are directly introduced into the refiner. Thus, optimal conditions can be set for both additive flows of chemicals such that the process can be operated in an energetically advantageous manner and corrosion and scale formation in the refiner and subsequent aggregates can be prevented as much as possible.

Description

VERFAHREN ZUR HERSTELLUNG VON FASERSTOFF  METHOD FOR PRODUCING FIBROUS MATERIAL
Die Erfindung betrifft ein Verfahren zur Herstellung von Faserstoff aus Lignozellulose aus Holz, vorzugsweise in Form von Hackschnitzeln, wobei das lignozellulose Material durch Chemikalien aus einer Mischung von Natriumsulfit und Natriumbisulfit imprägniert und anschließend einem Zerkleinerungsprozess in einem Refiner unterworfen wird. The invention relates to a process for the production of fibrous lignocellulose from wood, preferably in the form of wood chips, wherein the lignocellulosic material is impregnated by chemicals from a mixture of sodium sulfite and sodium bisulfite and then subjected to a crushing process in a refiner.
Verfahren zur Herstellung von Hochausbeutezellstoff sind z.B. aus der CA 1051618 bekannt. Hier werden bei chemischem Zellstoff, mechanischem Zellstoff,  Methods for producing high yield pulp are e.g. known from CA 1051618. Here, in chemical pulp, mechanical pulp,
chemimechanischem Zellstoff, thermomechanischem Zellstoff etc. in einer chemimechanical pulp, thermomechanical pulp etc. in one
Vorbehandlung zur Imprägnation Chemikalien zur Entfernung des Lignin zugesetzt. Der Einsatz von Schwefelverbindungen bei Hackschnitzeln aber auch Pretreatment for impregnation Chemicals added to remove the lignin. The use of sulfur compounds in wood chips but also
Jahrespflanzen ist gut bekannt und wird angewandt um Energie bei der Annual plants are well known and used for energy
Zerkleinerung einzusparen und die Qualität des Zellstoffs bei mechanischem Zellstoff zu verbessern. Als Chemikalien werden hier meist Mischungen aus Natriumsulfit und Natriumbisulfit bei Temperaturen von 100 - 150 °C eingesetzt, wobei der Zellstoff nach der Imprägnierung durch die Chemikalien eine gewisse Verweilzeit in einem Behälter verbringt. Natriumsulfit und Natriumbisulfit liegen gemeinsam vor, wobei sich das Gleichgewicht abhängig vom pH-Wert verschiebt. So liegt bei einem niedrigen pH-Wert (ca. 4 - 5,5) der größere Anteil an Natriumbisulfit vor, während bei einem höheren pH-Wert (ca. 6 - 7,5) der Großteil der Mischung als Natriumsulfit vorliegt. Um SO2 Emissionen zu vermeiden wird meist bei einem pH-Wert kleiner 5,5 oft auch kleiner 4,0 gearbeitet. Das gasförmige S02 als Produkt einer To save shredding and to improve the quality of the pulp in mechanical pulp. As chemicals, mixtures of sodium sulfite and sodium bisulfite are usually used here at temperatures of 100-150 ° C., the pulp, after being impregnated by the chemicals, spending a certain residence time in a container. Sodium sulfite and sodium bisulfite are present together, with the equilibrium shifts depending on the pH. Thus, at a low pH (about 4-5.5), the greater proportion of sodium bisulfite is present, while at a higher pH (about 6-7.5), the majority of the mixture is present as sodium sulfite. In order to avoid SO2 emissions, a pH of less than 5.5 is often used, which is often less than 4.0. The gaseous S0 2 as product of a
Bisulfitzersetzung kann bei der Vorbehandlungsstufe aber auch bei der Bisulfite can be used in the pretreatment stage but also in the
Zerkleinerung auftreten. Freies S02 kann auch mit Wasserdampf kondensieren und an kälteren Teilen der Apparate Korrosion erzeugen. Bei den höheren pH-WertCrushing occur. Free S0 2 can also condense with water vapor and produce corrosion on colder parts of the apparatus. At the higher pH
Bedingungen tritt aber ein Belag auf den Refinerplatten auf, der die Lebensdauer der Refinerplatten stark verkürzt. Auch kann es zu Verstopfungen der Kanäle der However, a condition occurs on the refiner plates, which greatly shortens the life of the refiner plates. Also it can cause blockages of the channels
Refinerplatten durch Kalziumsalze kommen. Bei geringeren pH-Werten kann Refining plates come through calcium salts. At lower pH values can
Korrosion auftreten und auch SO2 Emissionen im bzw. nach dem Refiner erfolgen. Ziel der Erfindung ist es Korrosion einerseits und Belagbildung auf den Refinerplatten andererseits zu vermeiden. Dies wird dadurch erreicht, dass zusätzlich Chemikalien aus einer Mischung von Natriumsulfit und Natriumbisulfit direkt in den Refiner eingebracht werden. Damit können die Bedingungen der Zugabe zur Imprägnation und in den Refiner Corrosion occur and also SO2 emissions occur in or after the refiner. The aim of the invention is to avoid corrosion on the one hand and formation of deposits on the refiner plates on the other. This is achieved by additionally introducing chemicals from a mixture of sodium sulfite and sodium bisulfite directly into the refiner. This allows the conditions of addition to the impregnation and in the refiner
unterschiedlich gestaltet und speziell die pH-Werte optimal angepasst werden, um Korrosion und Belagbildung zu vermeiden. designed differently and especially the pH values are optimally adapted to avoid corrosion and deposit formation.
Eine vorteilhafte Weiterbildung der Erfindung ist dadurch gekennzeichnet, dass die Chemikalien mit einem pH-Wert von 6,0 - 7,5, vorzugsweise von 6,5 - 7,0, der Imprägnation zugeführt werden. Damit kann man die Korrosion durch mit An advantageous development of the invention is characterized in that the chemicals with a pH of 6.0 to 7.5, preferably from 6.5 to 7.0, are fed to the impregnation. This can be done with the corrosion
Wasserdampf kondensiertes freiwerdendes SO2 in den Hauptaggregaten vermeiden. Eine günstige Ausgestaltung der Erfindung ist dadurch gekennzeichnet, dass die Chemikalien mit einem pH-Wert von 4,0 - 5,5, vorzugsweise 4,2-4,5, in den Refiner zugegeben werden. Dies ermöglicht, dass die Belagbildung auf den Refinerplatten stark reduziert oder vermieden werden kann und dadurch die Lebensdauer der Platten erheblich verlängert wird, was zu enormen Kostenersparnissen führt. Auch wird dadurch die Salzbildung, insbesondere von Kalziumsalzen, im Wesentlichen vermieden. Water vapor avoid condensed SO2 released in the main aggregates. A favorable embodiment of the invention is characterized in that the chemicals having a pH of 4.0-5.5, preferably 4.2-4.5, are added to the refiner. This allows the formation of deposits on the refiner plates can be greatly reduced or avoided, thereby significantly extending the life of the plates, resulting in enormous cost savings. Also, the salt formation, in particular of calcium salts, thereby substantially avoided.
Eine vorteilhafte Ausgestaltung der Erfindung ist dadurch gekennzeichnet, dass 60 - 80 % der Chemikalien in die Imprägnation und 20 - 40 % der Chemikalien in den Refiner gegeben werden. Damit wird eine besonders gute Ausnützung der An advantageous embodiment of the invention is characterized in that 60-80% of the chemicals are added to the impregnation and 20-40% of the chemicals in the refiner. This is a particularly good utilization of
Chemikalien erreicht. Chemicals reached.
Eine günstige Weiterbildung der Erfindung ist dadurch gekennzeichnet, dass die Imprägnation bei einer Temperatur von 80 - 170 °C, vorzugsweise von 130- 140°C, durchgeführt wird. In diesem Temperaturbereich ist eine besonders gute und schnelle Umsetzung der Chemikalien erreichbar. Eine günstige Weiterbildung der Erfindung ist dadurch gekennzeichnet, dass die Gesamtmenge der zugegebenen Chemikalien 1 - 20 kg/t, vorzugsweise 10-15 kg/t, beträgt. Damit kann der spezifische Energieverbrauch des Prozesses, insbesondere der Zerkleinerung im Refiner, signifikant reduziert werden. Die Erfindung wird nun anhand von Zeichnungen beispielhaft beschrieben, wobei die A favorable development of the invention is characterized in that the impregnation is carried out at a temperature of 80-170 ° C, preferably 130-140 ° C. In this temperature range, a particularly good and rapid implementation of the chemicals can be achieved. A favorable development of the invention is characterized in that the total amount of chemicals added is 1-20 kg / t, preferably 10-15 kg / t. Thus, the specific energy consumption of the process, in particular the comminution in the refiner, can be significantly reduced. The invention will now be described by way of example with reference to the drawings, in which
Fig. ein Fliessschema einer Vorbehandlungsanlage mit Imprägnation und Fig. A flow diagram of a pretreatment plant with impregnation and
nachfolgender Zerkleinerung im Refiner darstellt.  subsequent comminution in the refiner represents.
In der Fig. ist ein Beispiel für eine erfindungsgemäße Anlagenschaltung dargestellt. Aus einem Speicherbehälter 1 werden Holzhackschnitzel, die gegebenenfalls bereits vorbehandelt sind, einem Reaktor 2 zur Imprägnation zugeführt. Am Beginn dieses Reaktors wird über eine Leitung 3 eine Chemikalie zugeführt. Dies ist eine Mischung aus Natriumsulfit und Natriumbisulfit. Die hier zugeführte Chemikalie weist einen pH- Wert von ca. 6,5 -7,0 auf und beträgt etwa 60 - 80 % der Gesamtmenge an zuzugebenden Chemikalien. Es hat sich gezeigt, dass bei einem pH-Wert von 6,5 - 7,0 bereits 60 - 80 % der Reaktion nach kurzer Zeit, oft schon nach einigen The FIGURE shows an example of a system circuit according to the invention. From a storage container 1 woodchips, which may already be pretreated, fed to a reactor 2 for impregnation. At the beginning of this reactor is fed via a line 3, a chemical. This is a mixture of sodium sulfite and sodium bisulfite. The chemical supplied here has a pH of about 6.5-7.0 and is about 60-80% of the total amount of chemicals to be added. It has been shown that at a pH of 6.5 - 7.0 already 60 - 80% of the reaction after a short time, often after a few
Sekunden an Reaktionszeit, abgeschlossen ist. Grundsätzlich kann der pH-Wert 6,0Seconds of reaction time, completed. Basically, the pH can be 6.0
- 7,5 betragen. Mittels eines Förderers 4, z.B. Schneckenförderer, werden die imprägnierten Hackschnitzel einem Refiner 5 zur Zerkleinerung zugeführt. - 7.5. By means of a conveyor 4, e.g. Screw conveyor, the impregnated wood chips are fed to a refiner 5 for crushing.
Gleichzeitig wird hier über eine Leitung 6 die restliche Menge von ca. 20 - 40 % der Chemikalien, die wiederum aus einer Mischung von Natriumsulfit und Natriumbisulfit bestehen, zugeführt. Neben einer Zufuhr der Chemikalien direkt in die At the same time, the remaining amount of about 20-40% of the chemicals, which in turn consist of a mixture of sodium sulfite and sodium bisulfite, is fed in via a line 6. In addition to a supply of chemicals directly into the
Zerkleinerungszone des Refiner 5 kann die Zugabe auch mit dem Crushing zone of the refiner 5, the addition can also with the
Verdünnungswasser durch Löcher in den Mahlplatten der Statoren in die Dilution water through holes in the grinding plates of the stators in the
Zerkleinerungszone eingebracht werden. Auch hier handelt es sich um eine Crushing zone are introduced. Again, this is one
Mischung aus Natriumsulfit und Natriumbisulfit, wobei der pH-Wert vorzugsweise 4,0 Mixture of sodium sulfite and sodium bisulfite, wherein the pH preferably 4.0
- 4,5 beträgt. Grundsätzlich kann der pH-Wert hier 4,0 - 5,5 betragen. Dadurch ergibt sich in der Zerkleinerungszone ein pH-Wert, der Ablagerungen und Belag auf den Refinerplatten, insbesondere von Kalziumsulfit, verhindert. Sollte sich - 4.5. In principle, the pH here can be 4.0-5.5. This results in the crushing zone, a pH value, the deposits and coating on the refining plates, in particular of calcium sulfide prevented. Should
gasförmiges SO2 in der Zerkleinerungszone bilden, so würde dieses mit dem zurückgeführten Dampf 7 abtransportiert und vom lignozellulosen Material mit höherem pH-Wert absorbiert bzw. neutralisiert werden. Der Dampf 7 kann einer Stopfschnecke nach dem Speicherbehälter 1 zur Aufwärmung der Hackschnitzel zugeführt werden. Weiterer Dampf wird üblicherweise einer Wärmerückgewinnung zugeführt. Durch die erfolgte Aufteilung der Zugabe der Chemikalien, insbesondere von Bisulfit, kann der pH-Wert optimal an die Notwendigkeiten angepasst werden. Damit kann durch einen niedrigen pH-Wert im Zerkleinerungsprozess der spezifische Energieverbrauch gering gehalten werden, bei Erhalt der Festigkeit und optischen Eigenschaften des Zellstoffs bei gleichzeitiger Vermeidung der Korrosion und der Belagbildung im Refiner und anschließenden Aggregaten. form gaseous SO2 in the crushing zone, this would be removed with the recycled vapor 7 and absorbed or neutralized by the lignocellulosic material with a higher pH. The steam 7 can be fed to a stuffing screw after the storage container 1 for heating the wood chips. Additional steam is usually supplied to a heat recovery. By the distribution of the addition of the chemicals, in particular of bisulfite, the pH can be optimally adapted to the needs. Thus, the specific energy consumption can be kept low by a low pH in the crushing process, while maintaining the strength and optical properties of the pulp while avoiding corrosion and the formation of deposits in the refiner and subsequent aggregates.
Die Erfindung ist nicht auf die beschriebenen Beispiele beschränkt. Sie kann vielmehr sowohl für Hartholz als auch für Weichholz angewandt werden. The invention is not limited to the examples described. It can be used for both hardwood and softwood.

Claims

Patentansprüche Patent claims
1. Verfahren zur Herstellung von Faserstoff aus Lignozellulose aus Holz, 1. Process for producing pulp from lignocellulose from wood,
vorzugsweise in Form von Hackschnitzeln, wobei das lignozellulose Material durch Chemikalien aus einer Mischung von Natriumsulfit und Natriumbisulfit imprägniert und anschließend einem Zerkleinerungsprozess in einem Refiner unterworfen wird, dadurch gekennzeichnet, dass zusätzlich Chemikalien in einer Mischung aus Natriumsulfit und Natriumbisulfit direkt in den Refiner eingebracht werden. preferably in the form of wood chips, the lignocellulose material being impregnated by chemicals from a mixture of sodium sulfite and sodium bisulfite and then subjected to a comminution process in a refiner, characterized in that additional chemicals in a mixture of sodium sulfite and sodium bisulfite are introduced directly into the refiner.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Chemikalien mit einem pH-Wert von 6,0 - 7,5, vorzugsweise von 6,5 - 7,0 der 2. The method according to claim 1, characterized in that the chemicals have a pH of 6.0 - 7.5, preferably 6.5 - 7.0
Imprägnation zugeführt werden. Impregnation is supplied.
3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die 3. The method according to claim 1 or 2, characterized in that the
Chemikalien mit einem pH-Wert von 4,0 - 5,5 , vorzugsweise von 4,2 - 4,5 in den Refiner zugegeben werden. Chemicals with a pH of 4.0 - 5.5, preferably 4.2 - 4.5, are added to the refiner.
4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass 60 - 80 % der Chemikalien in die Imprägnation und 20 - 40 % der 4. Method according to one of claims 1 to 3, characterized in that 60 - 80% of the chemicals in the impregnation and 20 - 40% of the
Chemikalien in den Refiner gegeben werden. Chemicals are added to the refiner.
5. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Imprägnation bei einer Temperatur von 80 - 170 °C, vorzugsweise von 120 - 140 °C, durchgeführt wird. 5. Method according to one of claims 1 to 5, characterized in that the impregnation is carried out at a temperature of 80 - 170 °C, preferably 120 - 140 °C.
6. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Gesamtmenge der zugegebenen Chemikalien 1 - 20 kg/t, vorzugsweise 10 - 15 kg/t, beträgt. 6. Process according to one of claims 1 to 5, characterized in that the total amount of chemicals added is 1 - 20 kg/t, preferably 10 - 15 kg/t.
EP17724804.4A 2016-06-17 2017-05-18 Method for producing a fibrous material Active EP3472383B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA50551/2016A AT518800B1 (en) 2016-06-17 2016-06-17 METHOD FOR PRODUCING FIBROUS MATERIAL
PCT/EP2017/061926 WO2017215877A1 (en) 2016-06-17 2017-05-18 Method for producing a fibrous material

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EP3472383A1 true EP3472383A1 (en) 2019-04-24
EP3472383B1 EP3472383B1 (en) 2020-03-04

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US (1) US11535983B2 (en)
EP (1) EP3472383B1 (en)
AT (1) AT518800B1 (en)
CA (1) CA3028009C (en)
RU (1) RU2704362C1 (en)
WO (1) WO2017215877A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7697967B2 (en) 2005-12-28 2010-04-13 Abbott Diabetes Care Inc. Method and apparatus for providing analyte sensor insertion

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3225028A (en) * 1962-06-11 1965-12-21 Nordgren Robert Acrolein adducts of polygalactomannans and polyglucomannans and process of preparing same
FI42161C (en) * 1963-04-03 1970-05-11 Defibrator Ab A method for the continuous production of mechanical and semi-chemical pulps from a lignocellulosic material
GB1041995A (en) * 1964-11-24 1966-09-07 Fmc Corp Production of cellulosic pulp of increased brightness
CA1051618A (en) * 1976-05-14 1979-04-03 Prescott E. Gardner Method of producing high yield chemimechanical pulps
US4486267A (en) * 1983-11-14 1984-12-04 Mead Corporation Chemithermomechanical pulping process employing separate alkali and sulfite treatments
NZ211684A (en) * 1985-04-04 1989-07-27 Caxton Paper Ltd Manufacture of cellulose pulp: second digestion step follows initial digestion and refining steps
KR100750330B1 (en) * 2005-05-30 2007-08-20 유해일 Manufacturing method of mechanical pulp from cornstalk
US20090145564A1 (en) 2005-07-27 2009-06-11 Wolfgang Seifert Method for production of wood material articles with low emissions of chemical compounds
US8734611B2 (en) 2008-03-12 2014-05-27 Andritz Inc. Medium consistency refining method of pulp and system
DE102009057208A1 (en) * 2009-11-27 2011-06-01 Technische Universität Dresden Process for the production of lignocellulosic paper pulps and papers, cartons and boards derived therefrom
EP2348154A1 (en) * 2010-01-22 2011-07-27 Andritz AG Method for manufacturing wooden material

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EP3472383B1 (en) 2020-03-04
AT518800B1 (en) 2019-09-15
US11535983B2 (en) 2022-12-27
AT518800A1 (en) 2018-01-15
US20190352849A1 (en) 2019-11-21

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