EP2148000B1 - Method for obtaining cellulose - Google Patents
Method for obtaining cellulose Download PDFInfo
- Publication number
- EP2148000B1 EP2148000B1 EP20090009419 EP09009419A EP2148000B1 EP 2148000 B1 EP2148000 B1 EP 2148000B1 EP 20090009419 EP20090009419 EP 20090009419 EP 09009419 A EP09009419 A EP 09009419A EP 2148000 B1 EP2148000 B1 EP 2148000B1
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- EP
- European Patent Office
- Prior art keywords
- cellulose
- screw
- segments
- washing
- raw materials
- 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.)
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Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/02—Chemical or chemomechanical or chemothermomechanical pulp
-
- 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
- D21B1/30—Defibrating by other means
-
- 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
- D21C1/06—Pretreatment of the finely-divided materials before digesting with alkaline reacting compounds
-
- 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
- D21C3/02—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate processes
-
- 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
- D21C9/02—Washing ; Displacing cooking or pulp-treating liquors contained in the pulp by fluids, e.g. wash water or other pulp-treating agents
-
- 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
- D21C9/10—Bleaching ; Apparatus therefor
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/12—Pulp from non-woody plants or crops, e.g. cotton, flax, straw, bagasse
Definitions
- the invention relates to a process for the production of cellulose.
- the invention further relates to the cellulose industry, and more particularly to the recovery of cellulose from vegetable collus containing raw materials.
- the invention may be used for the recovery of cellulose intended for petroleum processing, cotton wool production and the paper industry.
- the Alkaliuf gleich is carried out at 120 - 130 ° C within 1 hour.
- the liquor contains a surfactant.
- the mass is then washed with a 1.5-fold amount of the clarified water, crushed and finely cleaned in a hydrocyclone with clarified water.
- the twice bleaching with NaOCl solution is performed.
- the temperature is 90 ° C
- the pH is 9 - 11.5, the duration is 1 hour.
- the following steps are carried out: washing with softened water, acidification with H 2 SO 4 solution at 15-40 ° C within 1 hour, repeated washing with softened water, spin-drying and air drying.
- the temperature is 130 - 140 ° C
- the pressure is 3-4 atm
- the duration is 180 - 210 min.
- the following steps are carried out: washing, bleaching with sodium hypochlorite in an acidic solution, spin-drying, loosening and drying ( RU 2078163 ).
- a prototype is the process for obtaining cellulose from cellulosic raw materials by simultaneous loosening and purification steps and further successive steps; Washing and comminution of raw materials, soaking, thermomechanical-chemical processing, washing, bleaching, washing, ejection and drying.
- the raw materials are allowed to mature in an alkaline solution ( RU 2007115321 ).
- the WO 2005/045126 describes a process for treating pulp fluids by heating in the presence of an alkaline earth metal oxide in a reactor at a temperature above 650 ° C.
- the invention is based on the object to provide an efficient and cost-effective method for the production of cellulose from cellulose-containing raw materials available.
- the raw materials used are herbaceous plants, in particular with a high content of shives, the woody inner part and lignin, with a high deposit duration on the fields and in storage rooms.
- Two parallel coupled shafts are installed in a heated chamber. Alternate auger and crushing cam segments are mounted on the shafts.
- thermo-mechanical-chemical processing is carried out before washing in a twin-screw apparatus, on the shafts of which alternating conveyor and brake screw segments are mounted.
- alternating auger, crushing cam and brake screw segments are mounted on the shafts.
- cellulose-containing raw materials are herbaceous plants, such as fiber flax, L. subsp. intermedium, oil flax, green flax, oilseed rape, miscanthus, clover, alfalfa, caster, Jerusalem artichoke, galega, Heracleum sosnowskyi, corn, etc., in various degrees of maturity, with high content of woody interior and lignin and with a large deposit duration, for example, in the fields and used in storage rooms.
- herbaceous plants such as fiber flax, L. subsp. intermedium, oil flax, green flax, oilseed rape, miscanthus, clover, alfalfa, caster, Jerusalem artichoke, galega, Heracleum sosnowskyi, corn, etc.
- the twin screw apparatus comprises a working chamber with a dense wall, feed and drainage nozzles. Within the working chamber two parallel coupled shafts are installed. Attachments of various purpose are mounted on the shafts: screw conveyor, crushing cam and brake screw segments. The worm segments are mounted alternately on the shafts. (Proof of the USSR no. 884715, 1981 ).
- the working chamber is favorably equipped with resistance heating elements.
- the heating elements can be laid around the outside of the wall. All heating elements can be connected to a controlled external power source.
- a thermosensor can be connected to the control input of this power source.
- cellulose-containing raw materials from herbaceous plants are pre-soaked in an alkali solution.
- the solution can be prepared with circulating water having a NaOH content of 10 to 60 g / l and a surfactant content of 0.2 to 0.8 g / l.
- the soaking can take place for 15-60 minutes at 90-100 ° C.
- the hydraulic modulus (the ratio of the solid / liquid phases) can be 1: (1 0 + 20).
- the heated pulp with 5 - 10% of the cellulosic raw materials is then conveniently in the on z. B. 80 - heated to 100 ° C twin screw apparatus.
- alternating auger, crushing cam and possibly Bremsschneokensegmente are mounted on the shafts of the twin screw apparatus alternating auger, crushing cam and possibly Bremsschneokensegmente are mounted.
- the screw segments can be displaced relative to one another such that a screw channel is formed.
- the turns of the screw segments can have the same diameter, the same direction and a fixed gear per screw segment.
- the winding path of each next screw segment may be smaller than the winding path of the previous screw segment.
- the distance between the turns of the screw segments and the inner wall of the working chamber may be 0.5 - 10 mm.
- the direction of the screw channel of the shredding cam segments and the direction of the screw flights may coincide.
- Preferably 10-16 screw conveyor segments and 5-20 crushing cam segments are used.
- the processed pulp is in the z. B. 85 - 105 ° C heated twin screw apparatus transported.
- Alternating conveyor and brake screw segments are mounted on the shafts of the apparatus.
- the screw conveyor segments may have 2 (or more) turns more than brake screw segments.
- thermomechanical-chamical processing is performed before washing.
- the processed pulp is conveyed to the twin screw apparatus heated to, for example, 90-110 ° C.
- crushing cam and possibly brake screw segments are mounted on the shafts of the apparatus.
- 10 to 16 screw conveyor segments preferably 7 to 20 crushing cam segments and preferably 4 to 10 brake screw segments are used.
- the pulp may be washed in softened water to remove the alkali radicals from the cellulosic mass.
- the washing is conveniently carried out in two stages.
- the mass is allowed in containers filled with water within z. B. 20 - 30 minutes at z. B. 80 - 90 ° C and within z. B. 20 - 30 minutes at z. B. 40 - 50 ° C lie.
- the hydraulic module can be 1: (10 + 20) at each stage.
- the bleaching of the flat cellulose may be carried out in a hydrogen peroxide solution having a concentration of e.g. B. 5 - 10 g / l at conveniently 85 - 95 ° C within z. B. 90 minutes.
- the hydraulic module can be 1: (10 + 20).
- the cellulose can be further washed with softened water, for example, as well as after Alkaliuf gleich.
- the centrifuging can be carried out in centrifuges of type AG or AOG up to z. B. 40 - 50% moisture.
- the cellulose can be dried, for example, with combustion gases at 140-160 ° C in a Vibrotrockner.
- the dried cellulose can be carried in a cyclone for air separation and on to the packaging.
- Two parallel coupled shafts are installed in a heated chamber. On the shafts are mounted alternating feed cutting and crushing cam segments.
- thermo-mechanical-chemical processing is carried out before washing in a twin-screw apparatus, on the shafts of which alternating conveyor and brake screw segments are mounted.
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Inorganic Chemistry (AREA)
- Paper (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
Description
Die Erfindung betrifft ein Verfahren zur Gewinnung von Cellulose.The invention relates to a process for the production of cellulose.
Die Erfindung betrifft ferner die Celluloseindustrie und Insbesondere die Gewinnung von Cellulose aus pflanzlichen collulosehaltigen Rohstoffen, Die Erfindung kann für die Gewinnung von Cellulose, die für die Erdölverarbeitung, die Watteproduktion und die Papierindustrie bestimmt ist, eingesetzt werden.The invention further relates to the cellulose industry, and more particularly to the recovery of cellulose from vegetable collus containing raw materials. The invention may be used for the recovery of cellulose intended for petroleum processing, cotton wool production and the paper industry.
Bekannt ist ein Verfahren zur Gewinnung von Cellulose, das Lockern der Rohstoffe und Alkaliaufschluss einschließt. Der Alkaliaufschluss wird bei 120 - 130 °C innerhalb von 1 Stunde durchgeführt. Die Lauge enthält dabei ein Tensid. Die Masse wird danach mit einer 1,5-fachen Menge des geklärten Wassers gewaschen, zerkleinert und in einem Hydrozyklon mit geklärtem Wasser feingereinigt. Dann wird das zweimalige Bleichen mit NaOCl-Lösung durchgeführt. Die Temperatur beträgt 90 °C, der pH-Wert liegt bei 9 - 11,5, die Dauer ist 1 Stunde. Danach werden folgende Schritte durchgeführt: Waschen mit enthärtetem Wasser, Absäuern mit H2SO4-Lösung bei 15 - 40 °C innerhalb von 1 Stunde, nochmaliges Waschen mit enthärtetem Wasser, Ausschleudern und Lufttrocknen.Known is a process for the recovery of cellulose, which includes loosening the raw materials and alkali digestion. The Alkaliufschluss is carried out at 120 - 130 ° C within 1 hour. The liquor contains a surfactant. The mass is then washed with a 1.5-fold amount of the clarified water, crushed and finely cleaned in a hydrocyclone with clarified water. Then the twice bleaching with NaOCl solution is performed. The temperature is 90 ° C, the pH is 9 - 11.5, the duration is 1 hour. Thereafter, the following steps are carried out: washing with softened water, acidification with H 2 SO 4 solution at 15-40 ° C within 1 hour, repeated washing with softened water, spin-drying and air drying.
Bekannt ist ferner ein Verfahren zur Gewinnung von Cellulose, das die mechanische Verarbeitung der cellulosehaltigen Rohstoffe durch gleichzeitige Lockern- und Reinigungsstufen einschließt. Danach erfolgt Alkaliaufschluss. Die Temperatur beträgt dabei 130 - 140 °C, der Druck ist 3 - 4 Atm, die Dauer ist 180 - 210 Min. Weiter werden folgende Schritte durchgeführt: Waschen, Bleichen mit Natriumhypochlorit in einer sauren Lösung, Ausschleudern, Lockern und Trocknen (
Des Weiteren ist ein Verfahren zur Gewinnung von Cellulose aus cellulosehaltigen Rohstoffen durch gleichzeitige Lockern- und Reinigungsstufen und nachfolgende Zerkleinerung, Einweichen in einer Alkalilösung und Reinigung bekannt. Danach erfolgt Alkaliaufschluss im Laufe von 1,5 - 3 Stunden beim hydraulischen Modul (Verhältnis der festen/flüssigen Phasen) von 1:(5-20). Zusätzlich wird in die Lauge ein Tensid zugegeben. Danach erfolgen Waschen, Bleichen in der Wasserstoffperoxidlösung, nochmaliges Waschen, Ausschleudern und Trocknen (
Als Prototyp dient das Verfahren zur Gewinnung von Cellulose aus cellulosehaltigen Rohstoffen durch gleichzeitige Lockern- und Reinigungsstufen und weitere aufeinander folgende Schritte; Waschen und Zerkleinerung der Rohstoffe, Einweichen, thermomechanisch-chemische Verarbeitung, Waschen, Bleichen, Waschen, Ausschleudern und Trocknen. In einer Ausführungsvariante des Verfahrens lässt man die Rohstoffe in einer Alkalllösung ausreifen (
Die
Der Erfindung liegt die Aufgabe zu Grunde, ein effizientes und kostengünstiges Verfahren zur Gewinnung von Cellulose aus cellulosehaltigen Rohstoffen zur Verfügung zu stellen. Als Rohstoffe werden Krautpflanzen insbesondere mit hohem Gehalt an Schäben, dem holzigen Innenteil und Lignin, mit großer Ablagerungsdauer auf den Feldern und in Lagerräumen, eingesetzt.The invention is based on the object to provide an efficient and cost-effective method for the production of cellulose from cellulose-containing raw materials available. The raw materials used are herbaceous plants, in particular with a high content of shives, the woody inner part and lignin, with a high deposit duration on the fields and in storage rooms.
Die gestellte Aufgabe wird durch die Merkmale des Anspruch 1 gelöst. Dabei sind unter anderem folgende Stufen vorgesehen:
- a) Einweichen der cellulosehaltigen Rohstoffe aus Krautpflanzen in einer Alkalilösung;
- b) thermomechanisch-chemische Verarbeitung in einem Doppelschneckenapparat;
- c) Waschen, Bleichen, Waschen, Ausschleudern und Trocknen.
- a) soaking the cellulose-containing raw materials from herbaceous plants in an alkali solution;
- b) thermomechanical-chemical processing in a twin screw apparatus;
- c) washing, bleaching, washing, spin-drying and drying.
Der Doppelschneckenapparat umfasst:
- a) eine beheizte Kammer;
- b) 2 parallel gekoppelte Wellen;
- c) Förderschneckensegmente;
- d) Zerkleinerungsnockensegmente.
- a) a heated chamber;
- b) 2 parallel coupled waves;
- c) screw conveyor segments;
- d) shredding cam segments.
Die einzelnen Elemente sowie ihre funktionelle Verbindung zum Doppelschneckenapparat, wie er im erfindungsgemäßen Verfahren eingesetzt wird, sind dem Fachmann an sich bekannt.The individual elements and their functional connection to the twin-screw apparatus, as used in the process according to the invention, are known per se to the person skilled in the art.
Zwei parallel gekoppelte Wellen sind in einer beheizten Kammer installiert. Auf den Wellen sind alternierende Förderschnecken- und Zerkleinerungsnockensegmente montiert.Two parallel coupled shafts are installed in a heated chamber. Alternate auger and crushing cam segments are mounted on the shafts.
Die zusätzliche thermomechanisch-chemische Verarbeitung wird vor dem Waschen in einem Doppelschneckenapparat, auf dessen Wellen alternierende Förder- und Bremsschneckensegmente montiert sind, durchgeführt.The additional thermo-mechanical-chemical processing is carried out before washing in a twin-screw apparatus, on the shafts of which alternating conveyor and brake screw segments are mounted.
Erfindungsgemäß sind alternierende Förderschnecken-, Zerkleinerungsnocken- und Bremsschneckensegmente auf den Wellen montiert.According to the invention, alternating auger, crushing cam and brake screw segments are mounted on the shafts.
Als cellulosehaltige Rohstoffe werden Krautpflanzen, beispielsweise Faserfflachs, L. subsp. intermedium, Ölflachs, Grünflachs, Raps, Miscanthus, Steinklee, Luzerne, Rizinusstaude, Topinambur, Galega, Heracleum sosnowskyi, Mais usw., in verschiedenen Ausreifungsgraden, mit hohem Gehalt am holzigen Innenteil und Lignin und mit einer großen Ablagerungsdauer bspw. auf den Feldern und in Lagerräumen eingesetzt.As cellulose-containing raw materials are herbaceous plants, such as fiber flax, L. subsp. intermedium, oil flax, green flax, oilseed rape, miscanthus, clover, alfalfa, caster, Jerusalem artichoke, galega, Heracleum sosnowskyi, corn, etc., in various degrees of maturity, with high content of woody interior and lignin and with a large deposit duration, for example, in the fields and used in storage rooms.
Der Doppelschneckenapparat umfasst eine Arbeitskammer mit einer dichten Wand, Beschickungs- und Entleerungsstutzen. Innerhalb der Arbeitskammer sind zwei parallel gekoppelte Wellen installiert. Auf den Wellen sind Aufsatzstücke verschiedener Zweckbestimmung montiert: Förderschnecken-, Zerkleinerungsnocken- und Bremsschneckensegmente. Die Schneckensegmente sind auf den Wellen alternierend montiert. (Urheberschein der UdSSR No.
Im erfindungsgemäßen Verfahren ist die Arbeitskammer günstigerweise mit Widerstandsheizelementen ausgestattet. Die Heizelemente können außen um die Wand herum verlegt sein. Alle Heizelemente können an eine gesteuerte Außenstromquelle angeschlossen sein. An den Steuereingang dieser Stromquelle kann ein Thermosensor angeschlossen sein.In the method according to the invention, the working chamber is favorably equipped with resistance heating elements. The heating elements can be laid around the outside of the wall. All heating elements can be connected to a controlled external power source. A thermosensor can be connected to the control input of this power source.
Im erfindungsgemäßen Verfahren werden cellulosehaltige Rohstoffe aus Krautpflanzen, insbesondere die vorgenannten aus Krautpflanzen, In einer Alkalilösung voreingeweicht. Die Lösung kann mit Kreislaufwasser mit einem NaOH-Gehalt von 10 - 60 g/l und einem Tensidgehalt von 0,2 - 0,8 g/l zubereitet sein. Das Einweichen kann während 15 - 60 Minuten bel 90 -100 °C erfolgen. Das hydraulische Modul (das Verhältnis der festen/flüssigen Phasen) kann 1:(1 0+20) betragen.In the process according to the invention, cellulose-containing raw materials from herbaceous plants, in particular the aforementioned from herbaceous plants, are pre-soaked in an alkali solution. The solution can be prepared with circulating water having a NaOH content of 10 to 60 g / l and a surfactant content of 0.2 to 0.8 g / l. The soaking can take place for 15-60 minutes at 90-100 ° C. The hydraulic modulus (the ratio of the solid / liquid phases) can be 1: (1 0 + 20).
Die geheizte Pulpe mit 5 - 10 % der cellulosehaltigen Rohstoffe wird danach günstigerweise in den auf z. B. 80 - 100 °C geheizten Doppelschneckenapparat befördert. Auf den Wellen des Doppelschneckenapparates sind alternierende Förderschnecken-, Zerkleinerungsnocken- und gegebenenfalls Bremsschneokensegmente montiert. Die Schneckensegmente können so zueinander verschoben sein, dass ein Schraubenkanal gebildet wird.The heated pulp with 5 - 10% of the cellulosic raw materials is then conveniently in the on z. B. 80 - heated to 100 ° C twin screw apparatus. On the shafts of the twin screw apparatus alternating auger, crushing cam and possibly Bremsschneokensegmente are mounted. The screw segments can be displaced relative to one another such that a screw channel is formed.
Die Windungen der Schneckensegmente können einen gleichen Durchmesser, eine gleiche Richtung und einen festen Gang je Schneckensegment aufweisen. Der Windungsgang jedes nächsten Schneckensegmentes kann kleiner als der Windungsgang des vorherigen Schneckensegmentes sein. Der Abstand zwischen den Windungen der Schneckensegmente und der Innenwand der Arbeitskammer kann 0,5 - 10 mm betragen. Die Richtung des Schraubenkanals der Zerkleinerungsnockensegmente und die Richtung der Schneckenwindungen können übereinstimmen. Es werden vorzugsweise 10 - 16 Förderschneckensegmente und 5 - 20 Zerkleinerungsnockensegmente eingesetzt.The turns of the screw segments can have the same diameter, the same direction and a fixed gear per screw segment. The winding path of each next screw segment may be smaller than the winding path of the previous screw segment. The distance between the turns of the screw segments and the inner wall of the working chamber may be 0.5 - 10 mm. The direction of the screw channel of the shredding cam segments and the direction of the screw flights may coincide. Preferably 10-16 screw conveyor segments and 5-20 crushing cam segments are used.
Die verarbeitete Pulpe wird in den auf z. B. 85 - 105 °C erhitzten Doppelschneckenapparat befördert. Auf den Wellen des Apparates sind alternierende Förder- und Bremsschneckensegmente montiert. Die Förderschneckensegmente können 2 (oder mehr) Windungen mehr als Bremsschneckensegmente aufweisen.The processed pulp is in the z. B. 85 - 105 ° C heated twin screw apparatus transported. Alternating conveyor and brake screw segments are mounted on the shafts of the apparatus. The screw conveyor segments may have 2 (or more) turns more than brake screw segments.
Wenn cellulosehaltige Rohstoffe spätreif sind, lange in Lagerräumen oder auf den Feldern abgelagert wurden oder einen hohen Ligningehalt haben, wird eine zusätzliche thermomechanisch-chamische Verarbeitung vor dem Waschen durchgeführt. Die verarbeitete Pulpe wird in den auf beispielsweise 90 - 110 °C erhitzten Doppelschneckenapparat befördert. Auf den Wellen des Apparates sind alternierende Förderschnecken-, Zerkleinerungsnocken- und gegebenenfalls Bremsschneckensegmente montiert. Es werden vorzugsweise 10 - 16 Förderschneckensegmente, vorzugsweise 7 - 20 Zerkleinerungsnockensegmente und vorzugsweise 4-10 Bremsschneckensegmente eingesetzt.If cellulosic raw materials are late-ripened, have been stored for a long time in storerooms or in the fields or have a high lignin content, additional thermomechanical-chamical processing is performed before washing. The processed pulp is conveyed to the twin screw apparatus heated to, for example, 90-110 ° C. On the shafts of the apparatus alternating auger, crushing cam and possibly brake screw segments are mounted. Preferably, 10 to 16 screw conveyor segments, preferably 7 to 20 crushing cam segments and preferably 4 to 10 brake screw segments are used.
Die Pulpe kann in enthärtetem Wasser zur Entfernung der Alkalireste aus der Cellulosemasse gewaschen werden. Das Waschen erfolgt günstigerweise in zwei Stufen. Die Masse lässt man in mit Wasser befüllten Behältern innerhalb von z. B. 20 - 30 Minuten bei z. B. 80 - 90 °C und Innerhalb von z. B. 20 - 30 Minuten bei z. B. 40 - 50 °C liegen. Das hydraulische Modul kann auf jeder Stufe 1:(10+20) betragen.The pulp may be washed in softened water to remove the alkali radicals from the cellulosic mass. The washing is conveniently carried out in two stages. The mass is allowed in containers filled with water within z. B. 20 - 30 minutes at z. B. 80 - 90 ° C and within z. B. 20 - 30 minutes at z. B. 40 - 50 ° C lie. The hydraulic module can be 1: (10 + 20) at each stage.
Das Bleichen der Flachocellulose kann in einer Wasserstoffperoxidlösung mit einer Konzentration von z. B. 5 - 10 g/l bei günstigerweise 85 - 95 °C innerhalb von z. B. 90 Minuten. Das hydraulische Modul kann 1:(10+20) betragen.The bleaching of the flat cellulose may be carried out in a hydrogen peroxide solution having a concentration of e.g. B. 5 - 10 g / l at conveniently 85 - 95 ° C within z. B. 90 minutes. The hydraulic module can be 1: (10 + 20).
Die Cellulose kann weiter mit enthärtetem Wasser gewaschen werden, bspw. genauso wie nach dem Alkaliaufschluss.The cellulose can be further washed with softened water, for example, as well as after Alkaliufschluss.
Das Ausschleudern kann in Zentrifugen vom Typ AG oder AOG bis z. B. 40 - 50 % Feuchtigkeit erfolgen.The centrifuging can be carried out in centrifuges of type AG or AOG up to z. B. 40 - 50% moisture.
Die Cellulose kann bspw. mit Verbrennungsgasen bei 140 -160 °C in einem Vibrotrockner getrocknet werden.The cellulose can be dried, for example, with combustion gases at 140-160 ° C in a Vibrotrockner.
Die getrocknete Cellulose kann in einem Zyklon für die Luftabtrennung und weiter zur Verpackung befördert werden.The dried cellulose can be carried in a cyclone for air separation and on to the packaging.
In der nachfolgenden Tabelle sind Ausführungsbeispiele 1 - 13 gemäß dem erfindungsgemäßen Verfahren aufgeführt.The following table shows exemplary embodiments 1-13 according to the method according to the invention.
Die Qualität der gewonnenen Cellulose wird entsprechend GOST 595-79 "Baumwollcellulose" geprüft. Physikalisch-chemische Kenndaten der gewonnenen Cellulose sind in der Tabelle zusammengefasst.The quality of the recovered cellulose is tested according to GOST 595-79 "Cotton Cellulose". Physicochemical characteristics of the recovered cellulose are summarized in the table.
Das Verfahren ist effizient. Es gestattet, Cellulose aus Krautpflanzen mit einer hohen Ertragsfähigkeit und einem hohen wirtschaftlichen Anbaupotential zu gewinnen. Selbstkosten der Cellulose sind wesentlich niedriger, d. h. die Cellulose kann mit dem erfindungsgemäßen Verfahren überraschenderweise sehr kostengünstig hergestellt werden.
Das erfindungsgemäße Verfahren zur Gewinnung der Cellulose umfasst:
- a) Einweichen der cellulosehaltigen Rohstoffe aus Krautpflanzen in einer Alkalilösung;
- b) thermomechanisch-chemische Verarbeitung In einem Doppelschneckenapparat;
- c) Waschen, Bleichen, Waschen, Ausschleudern, Trocknen.
- a) soaking the cellulose-containing raw materials from herbaceous plants in an alkali solution;
- b) thermomechanical-chemical processing In a twin-screw apparatus;
- c) washing, bleaching, washing, spin-drying, drying.
Der Doppelschneckenapparat umfasst:
- a) einer beheizten Kammer;
- b) 2 parallel gekoppelten Wellen;
- c) Förderschneckensegmenten;
- d) Zerkleinerungsnockensegmenten.
- a) a heated chamber;
- b) 2 parallel coupled waves;
- c) screw conveyor segments;
- d) shredding cam segments.
Zwei parallel gekoppelte Wellen sind in einer beheizten Kammer installiert. Auf den Wellen sind alternierende Förderechneoken- und Zerkleinerungsnockensegmente montiert.Two parallel coupled shafts are installed in a heated chamber. On the shafts are mounted alternating feed cutting and crushing cam segments.
Die zusätzliche thermomechanisch-chemische Verarbeitung wird vor dem Waschen in einem Doppelschneckenapparat, auf dessen Wellen alternierende Förder- und Bremsschneckensegmente montiert sind, durchgeführt.The additional thermo-mechanical-chemical processing is carried out before washing in a twin-screw apparatus, on the shafts of which alternating conveyor and brake screw segments are mounted.
Es ist möglich, alternierende Förderschnecken-, Zerkleinerungsnocken- und gegebenenfalls Bremsschneckensegmente auf die Wellen zu montieren.It is possible to mount alternating augers, crushing cam and possibly brake screw segments on the shafts.
Claims (2)
- Method for obtaining cellulose comprising the following successive steps: alkali processing of the cellulose-containing raw materials from leafy vegetables in a twin-screw apparatus, on the shafts of which alternating conveying and braking screw segments are mounted, washing, bleaching, washing, spinning and drying, wherein, before the alkali processing, the following are carried out successively: softening the cellulose-containing raw materials in an alkali solution, and additional alkali processing in a twin-screw apparatus comprising a heated chamber and 2 shafts coupled in parallel, installed within the chamber and on which alternating conveying screw segments and comminuting cam segments are mounted.
- Method according to Claim 1, characterized in that, before the first washing, an additional thermomechanical-chemical processing is carried out in a twin-screw apparatus, on the shafts of which, between conveying screw and braking screw segments, comminuting cam segments are mounted.
Priority Applications (1)
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PL09009419T PL2148000T3 (en) | 2008-07-24 | 2009-07-21 | Method for obtaining cellulose |
Applications Claiming Priority (1)
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RU2008130711/12A RU2378432C1 (en) | 2008-07-24 | 2008-07-24 | Method for cellulose production |
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EP2148000A2 EP2148000A2 (en) | 2010-01-27 |
EP2148000A3 EP2148000A3 (en) | 2012-02-01 |
EP2148000B1 true EP2148000B1 (en) | 2015-05-20 |
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EP20090009419 Not-in-force EP2148000B1 (en) | 2008-07-24 | 2009-07-21 | Method for obtaining cellulose |
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EP (1) | EP2148000B1 (en) |
PL (1) | PL2148000T3 (en) |
RU (1) | RU2378432C1 (en) |
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CN103317572A (en) * | 2013-05-29 | 2013-09-25 | 台州金晟环保制品有限公司 | Dry-process molding product bamboo fiber manufacturing method |
CN103450363B (en) * | 2013-08-12 | 2016-01-27 | 山东理工大学 | A kind of combined extracting ginger starch, cellulosic method |
RU2566275C1 (en) * | 2014-07-24 | 2015-10-20 | Федеральное государственное бюджетное учреждение науки Институт проблем химико-энергетических технологий Сибирского отделения РАН (ИПХЭТ СО РАН) | Method of obtaining of cellulose from half-wit flax for paper industry |
CN105625074A (en) * | 2016-02-24 | 2016-06-01 | 张民贵 | Process for preparing pulp from hemp stems |
CN108130771A (en) * | 2017-12-08 | 2018-06-08 | 齐鲁工业大学 | Clean pulping catalyst and its technique for applying |
CN111570474A (en) * | 2020-05-18 | 2020-08-25 | 长沙季丰科技有限公司 | Environment-friendly treatment and recycling method of areca residue |
RU2761239C1 (en) * | 2021-06-21 | 2021-12-06 | федеральное государственное автономное образовательное учреждение высшего образования «Национальный исследовательский университет ИТМО» (Университет ИТМО) | Method for producing cellulose |
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JPS6094042A (en) * | 1983-10-27 | 1985-05-27 | 日本農産工業株式会社 | Excretion treating material |
IT1279744B1 (en) * | 1995-05-19 | 1997-12-16 | Cartiera Di Cordenons S P A | PAPER MATERIALS FROM FIBROUS MIXTURES BASED ON INDUSTRIAL TEXTILE WASTE AND EXHAUSTED SUGAR BEET PULP. |
RU2078163C1 (en) | 1995-08-03 | 1997-04-27 | Центральный научно-исследовательский институт комплексной автоматизации легкой промышленности | Method for production of cotton wool |
GB0325578D0 (en) * | 2003-11-03 | 2003-12-03 | Bioregional Minimills Uk Ltd | Method for treating black liquor |
US20060020126A1 (en) * | 2002-07-26 | 2006-01-26 | Robert Kopesky | Production of microcrystalline cellulose |
RU2304647C2 (en) | 2005-08-24 | 2007-08-20 | Открытое акционерное общество "Научно-исследовательский институт по нефтепромысловой химии" ОАО "НИИнефтепромхим" | Cellulose manufacturing process |
CN1974922B (en) * | 2006-12-19 | 2010-10-13 | 河北吉藁化纤有限责任公司 | Method for producing chemical fiber pomace with fiber as raw material |
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- 2009-07-21 EP EP20090009419 patent/EP2148000B1/en not_active Not-in-force
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EP2148000A3 (en) | 2012-02-01 |
PL2148000T3 (en) | 2015-10-30 |
EP2148000A2 (en) | 2010-01-27 |
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