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WO2009000346A1 - Procédé de formation de carbonate de calcium dans une suspension de fibres - Google Patents

Procédé de formation de carbonate de calcium dans une suspension de fibres Download PDF

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Publication number
WO2009000346A1
WO2009000346A1 PCT/EP2008/001386 EP2008001386W WO2009000346A1 WO 2009000346 A1 WO2009000346 A1 WO 2009000346A1 EP 2008001386 W EP2008001386 W EP 2008001386W WO 2009000346 A1 WO2009000346 A1 WO 2009000346A1
Authority
WO
WIPO (PCT)
Prior art keywords
pulp
calcium carbonate
reactor
fibers
calcium hydroxide
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.)
Ceased
Application number
PCT/EP2008/001386
Other languages
German (de)
English (en)
Inventor
Klaus Doelle
Reinhard Gather
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.)
Voith Patent GmbH
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 WO2009000346A1 publication Critical patent/WO2009000346A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • D21H17/20—Macromolecular organic compounds
    • D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
    • D21H17/24—Polysaccharides
    • D21H17/28—Starch
    • 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
    • D21H17/20—Macromolecular organic compounds
    • D21H17/33—Synthetic macromolecular compounds
    • D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H17/54—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen
    • D21H17/55—Polyamides; Polyaminoamides; Polyester-amides
    • 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
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/06—Paper forming aids
    • D21H21/10—Retention agents or drainage improvers
    • 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
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/16—Sizing or water-repelling agents

Definitions

  • the invention relates to a method according to the preamble of claim 1.
  • US 5,223,090 discloses a method 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 combined with carbon dioxide while being subjected to a shear mixing process to obtain a fibrous material having a substantial amount of calcium carbonate on the fiber surface in the hollow interior and within the fiber walls of the cellulose fibers.
  • a method for loading a waste paper suspension which serves in particular to increase the whiteness of the - deinked or non-deinked - waste paper.
  • a waste paper suspension is preferably introduced at a consistency of between 0.1 and 5% in a gas / liquid reactor. Downstream of this insertion then takes place the supply of a basic salt-containing liquid, in particular of calcium hydroxide, wherein the thus mixed components with a reaction gas, in particular carbon dioxide, are brought into contact, thereby precipitating the filler.
  • the thus loaded waste paper suspension is then used for paper or board production.
  • a particularly suitable gas / liquid reactor a mixing container is proposed in which gas bubbles are distributed in a liquid. Apparently, an unusually high degree of filling of the pulp (filler content several hundred percent of the fiber weight) is required to achieve the desired whiteness.
  • a further method for loading a pulp suspension comprises the following steps: introduction of calcium hydroxide in liquid or dry form or of calcium oxide into the pulp suspension, thickening and heating of the pulp suspension, feeding of gaseous carbon dioxide in a crystallizer, precipitation of calcium carbonate by the carbon dioxide.
  • Fiber loaded with calcium carbonate fiber loaded precipitate calcium carbonate
  • the field of application of the invention extends to paper and pulp production and process technology, including the filler produced, and includes fields of application of all types of paper, including those resulting from their production, which have a filler content between 1% and 60%.
  • the filler content may be between 5% and 50%.
  • Loading has a positive effect on the processes in stock preparation, paper machine and / or further processing.
  • a paper web made of loaded fibers is easier to dewater, for which reason e.g. the machine speed can be increased and / or the press section can be operated with a lower pressing pressure.
  • a further advantage of the use of the technology according to the invention in the paper grades listed above is that they can also be further processed without problems in a calender.
  • the fiber load can be used to increase the productivity of the paper machine and / or to make its production more cost-effective (by, for example, raw material energy cost reduction).
  • the new process will increase the calcium hydroxide uptake of the fibers.
  • electrical action of the added anionic substances a stronger connection to the fiber surfaces and / or a better penetration into the cavities can be achieved and also the production of calcium carbonate within the fibers ("lumen loading") can be increased.
  • Lumen loading can be further intensified if, after addition to the pulp suspension, the anionic substances are removed by a special process step, e.g. Washing / thickening of the outer surfaces of the fibers are removed again, so that the charge setting of lumens and fiber outer surfaces is different.
  • a special process step e.g. Washing / thickening of the outer surfaces of the fibers are removed again, so that the charge setting of lumens and fiber outer surfaces is different.
  • the starting material for the loading process is an aqueous pulp suspension, in particular pulp suspension with 0.1 to 30% consistency. This is mixed with calcium oxide or hydroxide in liquid or solid form.
  • the calcium hydroxide is suspended to a large extent in the form of fine solid particles and is brought into contact with the surface of the fibers. Because the Fibers have the form of at least one side open elongated hollow bodies, the calcium hydroxide can also penetrate into the interior of the fibers, the so-called lumen.
  • additional calcium hydroxide or calcium oxide in aqueous and / or solid form may also be mixed into the reactor, e.g. be added as lime milk.
  • the process temperature is between generation of the calcium carbonate + 15 0 C and 130 ° C, in particular between 20 ° and 60 ° C.
  • the formation of the calcium carbonate is preferably carried out in a pressure range between 0.1 and 6 bar, in particular between 1 and 4 bar. There are also higher pressures, e.g. up to 20 bar possible.
  • the average residence time of the substance in the reactor is between 60 seconds and 15 minutes, in particular between 5 and 10 minutes.
  • the solids concentration of the pulp suspension provided for reaction with carbon dioxide is selected in a range from about 0.1 to about 40% and preferably in a range from about 0.5 to 30%.
  • crystals of a rhombohedral form may be used Particle size fraction in a range of about 0.02 to about 5 microns are generated.
  • crystals of a scalenohedral form or agglomerates having a respective length in a range from about 0.02 to about
  • Fig. 1 is a plant diagram for illustrating the method according to the invention
  • Fig. 2 system diagram for a varied method.
  • a favorable embodiment of the method according to the invention is illustrated by means of a plant scheme.
  • a pulp suspension 1 is formed in the pulper 10.
  • the dissolution in pulper 10 should be so complete that practically all fibers are separated. Otherwise, it would be advisable to use a de-stuffer downstream of the pulper 10.
  • a mixing vessel 2 with stirrer 28 serves to provide the fiber suspension 1 with calcium oxide or calcium hydroxide, e.g. as here in the form of milk of lime MOL, to mix and also to allow a defined residence time.
  • the lime milk MOL is provided by a lime leaching device 3 and conveyed by a pump 11.
  • the attachment of the added or formed calcium hydroxide to the fibers is favored by the addition of anionic substances, which is indicated with a chemical container 22 and corresponding dosage.
  • the anionic substances are preferably added before the calcium oxide or hydroxide. They are composed in particular of salts, polyamides, retention aids or starch particles.
  • a suitable reactor 5 is for example a closed container provided with a stirrer 27. Due to the movements of the contents, the reactants can easily come into contact.
  • the loaded pulp then passes into a finishing unit, e.g. a storage tank 13. From there it is pumped for further processing, ultimately for the production of paper or cardboard.
  • a finishing unit e.g. a storage tank 13.
  • the plant scheme of Fig. 2 shows a variant of the method.
  • the formation of the pulp suspension and its treatment with anionic substances can be carried out similarly as described in FIG.
  • the addition of at least part of the milk of lime MOL into the pulper 10 is indicated here (dashed line). If the solution is dissolved in batch mode, the lime milk MOL can later be added to pulper 10 as the anionic substances.
  • the mixture 7 enters the press 4, in which the consistency is set to a value, for example, is up to 30%.
  • the pressed filtrate 14 flows into the press water tank 8 and can be conveyed via a filtrate pump 12 to the desired locations.
  • a suitable reactor 6 is, for example, a closed screw conveyor, which is preferably operated so that it is filled to a maximum of 80% - VoI, preferably 50% -vol, with a moist solid, wherein the water volume of the pulp is included.
  • the remaining volume in the reactor 6 is occupied by gas or steam or spray liquid. Due to the movements of the contents, the reactants can easily come into contact.

Landscapes

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

Abstract

L'invention concerne un procédé de chargement de fibres avec des charges, notamment du carbonate de calcium. Selon ce procédé, de l'hydroxyde de calcium est mis en contact avec du dioxyde de carbone gazeux (CO2), p. ex. dans du lait de chaux (MOL), du carbonate de calcium étant formé par une réaction chimique. Avant cette réaction, la pénétration de l'hydroxyde de calcium dans les fibres est favorisée par l'ajout de substances anioniques, telles que notamment des sels, des polyamides, des agents de rétention ou des particules d'amidon ou un mélange de ces substances.
PCT/EP2008/001386 2007-06-27 2008-02-22 Procédé de formation de carbonate de calcium dans une suspension de fibres Ceased WO2009000346A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007029686.1 2007-06-27
DE200710029686 DE102007029686A1 (de) 2007-06-27 2007-06-27 Verfahren zum Bilden von Calciumcarbonat in einer Faserstoffsuspension

Publications (1)

Publication Number Publication Date
WO2009000346A1 true WO2009000346A1 (fr) 2008-12-31

Family

ID=39387111

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/001386 Ceased WO2009000346A1 (fr) 2007-06-27 2008-02-22 Procédé de formation de carbonate de calcium dans une suspension de fibres

Country Status (2)

Country Link
DE (1) DE102007029686A1 (fr)
WO (1) WO2009000346A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014174155A1 (fr) * 2013-04-26 2014-10-30 Wetend Technologies Oy Procédé pour alimenter une composition de fabrication d'une bande fibreuse en charge, et papier ou carton
US9051689B2 (en) 2010-08-20 2015-06-09 Upm-Kymmene Corporation Method for precipitating calcium carbonate
CN109072555A (zh) * 2016-04-13 2018-12-21 德尔福特集团有限公司 具有针对脂肪的增强的抗性的用于食物的轻质包装纸
US10646108B2 (en) 2013-12-24 2020-05-12 Motus Gi Medical Technologies Ltd. Ancillary vacuum module usable with an endoscope
CN118580012A (zh) * 2024-06-20 2024-09-03 华新水泥股份有限公司 一种绿色低碳的改性钢纤维及应用

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4925530A (en) * 1985-12-21 1990-05-15 The Wiggins Teape Group Limited Loaded paper
US5223090A (en) * 1991-03-06 1993-06-29 The United States Of America As Represented By The Secretary Of Agriculture Method for fiber loading a chemical compound
US5665205A (en) * 1995-01-19 1997-09-09 International Paper Company Method for improving brightness and cleanliness of secondary fibers for paper and paperboard manufacture
DE10204254A1 (de) * 2002-02-02 2003-08-14 Voith Paper Patent Gmbh Verfahren zur Aufbereitung von in einer Faserstoffsuspension enthaltenen Fasern

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4925530A (en) * 1985-12-21 1990-05-15 The Wiggins Teape Group Limited Loaded paper
US5223090A (en) * 1991-03-06 1993-06-29 The United States Of America As Represented By The Secretary Of Agriculture Method for fiber loading a chemical compound
US5665205A (en) * 1995-01-19 1997-09-09 International Paper Company Method for improving brightness and cleanliness of secondary fibers for paper and paperboard manufacture
DE10204254A1 (de) * 2002-02-02 2003-08-14 Voith Paper Patent Gmbh Verfahren zur Aufbereitung von in einer Faserstoffsuspension enthaltenen Fasern

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9051689B2 (en) 2010-08-20 2015-06-09 Upm-Kymmene Corporation Method for precipitating calcium carbonate
WO2014174155A1 (fr) * 2013-04-26 2014-10-30 Wetend Technologies Oy Procédé pour alimenter une composition de fabrication d'une bande fibreuse en charge, et papier ou carton
CN105339548A (zh) * 2013-04-26 2016-02-17 芬兰温德造纸湿部技术公司 为制造纤维网的配料提供填料的方法以及纸或纸板
CN105339548B (zh) * 2013-04-26 2017-05-03 芬兰温德造纸湿部技术公司 为制造纤维网的配料提供填料的方法以及纸或纸板
US9708772B2 (en) 2013-04-26 2017-07-18 Wetend Technologies Oy Method of providing fiber web making furnish with filler, and paper or paper board
US10646108B2 (en) 2013-12-24 2020-05-12 Motus Gi Medical Technologies Ltd. Ancillary vacuum module usable with an endoscope
US11849921B2 (en) 2013-12-24 2023-12-26 Motus Gi Medical Technologies Ltd. Ancillary vacuum module usable with an endoscope
CN109072555A (zh) * 2016-04-13 2018-12-21 德尔福特集团有限公司 具有针对脂肪的增强的抗性的用于食物的轻质包装纸
CN118580012A (zh) * 2024-06-20 2024-09-03 华新水泥股份有限公司 一种绿色低碳的改性钢纤维及应用

Also Published As

Publication number Publication date
DE102007029686A1 (de) 2009-01-02

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