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WO2007006369A1 - Procede et dispositif d'introduction d'une charge dans des fibres contenues dans une suspension de matiere fibreuse - Google Patents

Procede et dispositif d'introduction d'une charge dans des fibres contenues dans une suspension de matiere fibreuse Download PDF

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Publication number
WO2007006369A1
WO2007006369A1 PCT/EP2006/005040 EP2006005040W WO2007006369A1 WO 2007006369 A1 WO2007006369 A1 WO 2007006369A1 EP 2006005040 W EP2006005040 W EP 2006005040W WO 2007006369 A1 WO2007006369 A1 WO 2007006369A1
Authority
WO
WIPO (PCT)
Prior art keywords
pulp
filler
calcium hydroxide
chest
mixing device
Prior art date
Application number
PCT/EP2006/005040
Other languages
German (de)
English (en)
Inventor
Klaus Doelle
Original Assignee
Voith Patent Gmbh
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 Voith Patent Gmbh filed Critical Voith Patent Gmbh
Publication of WO2007006369A1 publication Critical patent/WO2007006369A1/fr

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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
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/63—Inorganic compounds
    • D21H17/70—Inorganic compounds forming new compounds in situ, e.g. within the pulp or paper, by chemical reaction with other substances added separately
    • 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
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/63—Inorganic compounds
    • D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
    • D21H17/675—Oxides, hydroxides or carbonates
    • 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
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/78—Controlling or regulating not limited to any particular process or apparatus

Definitions

  • the invention relates to a method for loading a pulp suspension of cellulose fibers with a filler, in particular with calcium carbonate, wherein calcium hydroxide is introduced in liquid or dry form into the pulp suspension.
  • US 5,223,090 discloses a process employing fibrous material having elongated fibers with a cell wall surrounding a cavity, the fibers having a humidity sufficient to form a dewatered pulp slurry.
  • the fibers have a moisture content corresponding to a proportion of 40 to 50% of the weight of the fibers.
  • the water is essentially present inside the fibers and inside the fiber walls.
  • calcium oxide or calcium hydroxide is added to the pulp so that at least part of the incorporated calcium oxide or calcium hydroxide is associated with the water present in the pulp.
  • the fibrous cellulosic material is contacted with carbon dioxide while simultaneously subjected to a shear mixing process to produce a fibrous material having a substantial amount of calcium carbonate in the hollow interior and within the fibrous walls of the cellulosic fibers by precipitation.
  • the known method comprises the following steps: introduction of
  • Pulp suspension precipitation of calcium carbonate by the carbon dioxide.
  • the ash value of the Checked pulp suspension and set by means of a regulator comprehensive control device to a desired value.
  • this object is achieved in that the content of filler, in particular in a chest, a Ableerbütte, a machine chest or the like., And / or in a pipeline by a mixing device, in particular a recirculation and / or a bypass device, is regulated.
  • the process can be used independently of the fiber raw material to be loaded.
  • GCC ground calcium carbonate
  • TiÜ 2 titanium dioxide
  • Filler content can be controlled, for example, in a range between 0.01% and 15% above the original filler content of the fiber material.
  • the field of application of the invention extends to papermaking and the
  • Process technology including the filler produced, and includes Areas of application for all types of paper including packaging paper grades having a filler content of between 1% and 60% and / or having a white topcoat with a filler content of between 1% and 60%.
  • the field of use of the invention is not limited to the use of these fillers in paper making processes;
  • the invention can be used in any paper producing process or auxiliary process including pulp production.
  • Treating a pulp suspension in papermaking with fiber-loading technology results in a completely new product that has new and improved properties over the products known in the market.
  • the process described below makes it possible to precipitate filler (calcium carbonate) directly at stock preparation in a paper mill, which is uniformly distributed and deposited exclusively on and in the pulp, in particular the paper fiber.
  • the press filtrate can be recycled to the pulping system.
  • Calcium hydroxide which does not accumulate on or in the fibers, is recycled to the upstream processes. Only the filler that is not deposited on or in the fibers, ie, free precipitated calcium carbonate, is washed out.
  • the invention comprises a method according to which the pulp suspension is introduced into a press arrangement for pressing out a filtrate. Subsequently, the filtrate is at least partially recycled to an arrangement for dissolving the pulp suspension, i. h., In an input-side storage vessel, for example, in a receiver chest.
  • the calcium hydroxide is at least partially added in the pulp dissolving arrangement.
  • a pH between 7 and 12, in particular between 9 and 12 is maintained.
  • aqueous pulp material in particular aqueous paper stock, from 0.1 to 20% consistency, preferably between 2 and 8%.
  • Calcium hydroxide in aqueous or in dry form or calcium oxide is mixed in a range between 0.01 and 60% of the existing solids content in the aqueous paper pulp.
  • a static mixer, a receiver chest or a material dissolving system is used; In this case, a pH in the range between 7 and 12, preferably between 9 and 12, is used.
  • the reactivity of the calcium hydroxide is between 0.01 and 10 minutes, preferably between 1 second and 3 minutes. Dilution water is mixed in according to given reaction parameters.
  • Carbon dioxide is mixed in accordance with the reaction parameters in a moist pulp dimension. Calcium carbonate falls in the carbon dioxide Atmosphere.
  • a higher degree of grinding can be achieved in an energy-efficient manner according to the invention; According to the invention, up to 50% of the grinding energy can be saved.
  • FL (fiber loading) papers which do not require fillers
  • free filler that is not deposited on or in the fibers may be removed after the milling process or prior to introduction of the pulp suspension into the headbox or prior to feeding to the paper machine.
  • the fibers themselves are provided with filler inside and outside, so that the positive effects of fiber-loading technology remain.
  • the high mechanical properties achieved by the high degree of freeness of the final product have a positive effect on the production of all types of paper, as caused by process-related mechanical stresses in the various sections of the paper machine, as in the press section, the dryer section or in the area in which the paper web rolled up is, the intermediate product produced and the final product to be produced by the use of reeling, wrapping, rewinding and converting machines is mechanically highly loaded.
  • the pretreatment of the pulp suspension according to the invention also creates the prerequisite for better drying, which increases the efficiency in the production of all types of paper.
  • the advantage is residual moisture in the range between 1 and 20%.
  • Types of paper, cardboard or in different uses of cardboard including the white top layer on a cardboard layer, achieved.
  • the energy input during the grinding process d. H. the amount of heat and the resulting heating is controlled. According to the control, crystals of various shapes can be produced.
  • the invention relates to a process in which a static mixer, a refiner, a disperser and / or a fluffer FLPCC reactor is used as the reactor, wherein the pulp content, in particular the paper content, in a static mixer between 0.01 and 15%; with a refiner and with a disperser between 2 and 40%, in particular with an LC grinding between 2 and 8% and with a HC grinding between 20 and 35%, as well as with a Fluffer FLPCC reactor between 15 and 60% ,
  • the process temperature is between -15 ° C and 120 ° C, in particular between 20 ° and 90 ° C.
  • rhombohedral, scalenohedral and spherical crystals are produced, wherein the crystals dimensions between 0.05 and 5 .mu.m, in particular between 0.3 and 2.5 ⁇ m.
  • Static and / or mobile, in particular rotating, mixing elements are used to produce a fibrous suspension laden with calcium carbonate.
  • the process is preferably carried out in a pressure range between 0 and 15 bar, in particular between 0 and 6 bar.
  • the process is advantageously carried out at a pH of between 6 and 10, in particular between 6.5 and 9.5.
  • the reaction time is between 0.03 seconds and 1 minute, in particular between 0.05 and 10 seconds.
  • Another advantage of using the technology according to the invention in the paper grades listed above is that they are also in a calender can be further processed.
  • fiber-loading technology fiber-loading particles are deposited in, around and on the fibers, thus avoiding blackening, ie black satin coating.
  • the invention also relates to an arrangement for carrying out one of the methods listed above.
  • the arrangement is characterized in that it comprises a mixing device which is operated as a bypass and / or as a recirculation region for the pulp suspension.
  • An advantage is an arrangement in which the mixing device is designed as a static mixer, as a receiver chest or as a material dissolving system.
  • a mixing device calcium hydroxide in dry or liquid form (lime milk) is mixed in aqueous paper pulp in the range of 0.01% to 60% of the existing solids content of the dry paper pulp.
  • Paper stock 1 provided for fiber loading is fed to a tray 2, from which it is transported further into a machine for producing a paper web (paper production 3).
  • the tray 2 is connected via two lines with a mixing device 4 in connection.
  • lime milk 8 from a device for providing this substance (lime milk production 5) and, on the other hand, the carbon dioxide 9 originating from the CO 2 production 7 are fed to the mixing device 4.
  • a heating device 6 is also present, in which either lime milk 8 ' or carbon dioxide 9 ' or both substances are heated in such a way that the desired reaction rate is established.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Paper (AREA)

Abstract

Procédé d'introduction d'une charge, en particulier de carbonate de calcium, dans une suspension de fibres de cellulose, de l'hydroxyde de calcium étant introduit sous forme liquide ou sèche dans la suspension de matière fibreuse. Ledit procédé est caractérisé en ce que la quantité de charge est régulée, en particulier dans une cuve (2), une cuve de décharge, un cuvier de machine ou analogue, et / ou dans une conduite, par un dispositif de mélange (4), en particulier un dispositif de recirculation et / ou de dérivation.
PCT/EP2006/005040 2005-07-14 2006-05-26 Procede et dispositif d'introduction d'une charge dans des fibres contenues dans une suspension de matiere fibreuse WO2007006369A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005032773 2005-07-14
DE102005032773.7 2005-07-14

Publications (1)

Publication Number Publication Date
WO2007006369A1 true WO2007006369A1 (fr) 2007-01-18

Family

ID=36953387

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2006/005040 WO2007006369A1 (fr) 2005-07-14 2006-05-26 Procede et dispositif d'introduction d'une charge dans des fibres contenues dans une suspension de matiere fibreuse

Country Status (1)

Country Link
WO (1) WO2007006369A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007007295A1 (de) * 2007-02-14 2008-08-21 Voith Patent Gmbh Verfahren zum Bilden von Füllstoffen, insbesondere Calciumcarbonat in einer Faserstoffsuspension
AU2011218764B2 (en) * 2001-12-28 2014-03-06 Trisa Holding Ag Toothbrush and process for producing such a toothbrush
CN107667195A (zh) * 2015-05-22 2018-02-06 福伊特专利有限公司 用于制造高填充度纸张的方法和设备

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0791685A2 (fr) * 1996-02-20 1997-08-27 Metsä-Serla Oy Procédé d'addition de charges dans une suspension de fibres cellulosiques
US5679220A (en) * 1995-01-19 1997-10-21 International Paper Company Process for enhanced deposition and retention of particulate filler on papermaking fibers
WO1999051525A1 (fr) * 1998-04-07 1999-10-14 Fp-Pigments Oy Procede et appareil de production de carbonate de calcium precipite
US20010033820A1 (en) * 2000-03-06 2001-10-25 Isaac Yaniv Precipitated aragonite and a process for producing it
US20020026989A1 (en) * 2000-07-13 2002-03-07 Jorg Rheims Process for loading fibers with calcium carbonate
US20020088566A1 (en) * 2000-02-24 2002-07-11 Voith Sulzer Paper Technology North America, Inc. Method of chemically loading fibers in a fiber suspension
WO2002088466A1 (fr) * 2001-04-27 2002-11-07 Voith Paper Patent Gmbh Procede et dispositif pour charger des fibres contenues dans une suspension fibreuse avec du carbonate de calcium
DE10317719A1 (de) * 2003-04-17 2004-11-11 Voith Paper Patent Gmbh Verfahren zum Einstellen des Aschegehalts einer Faserstoffsuspension und Anordnung zur Durchführung des Verfahrens

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5679220A (en) * 1995-01-19 1997-10-21 International Paper Company Process for enhanced deposition and retention of particulate filler on papermaking fibers
EP0791685A2 (fr) * 1996-02-20 1997-08-27 Metsä-Serla Oy Procédé d'addition de charges dans une suspension de fibres cellulosiques
WO1999051525A1 (fr) * 1998-04-07 1999-10-14 Fp-Pigments Oy Procede et appareil de production de carbonate de calcium precipite
US20020088566A1 (en) * 2000-02-24 2002-07-11 Voith Sulzer Paper Technology North America, Inc. Method of chemically loading fibers in a fiber suspension
US20010033820A1 (en) * 2000-03-06 2001-10-25 Isaac Yaniv Precipitated aragonite and a process for producing it
US20020026989A1 (en) * 2000-07-13 2002-03-07 Jorg Rheims Process for loading fibers with calcium carbonate
WO2002088466A1 (fr) * 2001-04-27 2002-11-07 Voith Paper Patent Gmbh Procede et dispositif pour charger des fibres contenues dans une suspension fibreuse avec du carbonate de calcium
DE10317719A1 (de) * 2003-04-17 2004-11-11 Voith Paper Patent Gmbh Verfahren zum Einstellen des Aschegehalts einer Faserstoffsuspension und Anordnung zur Durchführung des Verfahrens

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2011218764B2 (en) * 2001-12-28 2014-03-06 Trisa Holding Ag Toothbrush and process for producing such a toothbrush
DE102007007295A1 (de) * 2007-02-14 2008-08-21 Voith Patent Gmbh Verfahren zum Bilden von Füllstoffen, insbesondere Calciumcarbonat in einer Faserstoffsuspension
CN107667195A (zh) * 2015-05-22 2018-02-06 福伊特专利有限公司 用于制造高填充度纸张的方法和设备

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