WO2009000345A1 - Procédé de formation de charges, notamment de carbonate de calcium, dans une suspension - Google Patents
Procédé de formation de charges, notamment de carbonate de calcium, dans une suspension Download PDFInfo
- Publication number
- WO2009000345A1 WO2009000345A1 PCT/EP2008/001383 EP2008001383W WO2009000345A1 WO 2009000345 A1 WO2009000345 A1 WO 2009000345A1 EP 2008001383 W EP2008001383 W EP 2008001383W WO 2009000345 A1 WO2009000345 A1 WO 2009000345A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- calcium carbonate
- reactor
- crystallization
- calcium hydroxide
- pulp
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 47
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 title claims abstract description 40
- 229910000019 calcium carbonate Inorganic materials 0.000 title claims abstract description 20
- 239000000945 filler Substances 0.000 title claims abstract description 19
- 239000000725 suspension Substances 0.000 title claims abstract description 14
- 239000000920 calcium hydroxide Substances 0.000 claims abstract description 22
- 238000002425 crystallisation Methods 0.000 claims abstract description 17
- 230000008025 crystallization Effects 0.000 claims abstract description 17
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 15
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims abstract description 14
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims abstract description 14
- 239000007788 liquid Substances 0.000 claims abstract description 12
- 238000006243 chemical reaction Methods 0.000 claims abstract description 9
- 239000002245 particle Substances 0.000 claims abstract description 9
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 7
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 7
- 239000000203 mixture Substances 0.000 claims abstract description 7
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 6
- 239000000126 substance Substances 0.000 claims abstract description 6
- 239000004952 Polyamide Substances 0.000 claims abstract description 3
- 125000000129 anionic group Chemical group 0.000 claims abstract description 3
- 230000014759 maintenance of location Effects 0.000 claims abstract description 3
- 229920002647 polyamide Polymers 0.000 claims abstract description 3
- 229920002472 Starch Polymers 0.000 claims abstract 2
- 150000003839 salts Chemical class 0.000 claims abstract 2
- 239000008107 starch Substances 0.000 claims abstract 2
- 235000019698 starch Nutrition 0.000 claims abstract 2
- 235000011116 calcium hydroxide Nutrition 0.000 claims description 21
- 238000004519 manufacturing process Methods 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000002360 preparation method Methods 0.000 claims description 7
- 239000000706 filtrate Substances 0.000 claims description 6
- 239000012297 crystallization seed Substances 0.000 claims description 5
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 4
- 239000000292 calcium oxide Substances 0.000 claims description 4
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 3
- 230000008719 thickening Effects 0.000 claims description 2
- 238000004090 dissolution Methods 0.000 claims 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims 1
- 235000011941 Tilia x europaea Nutrition 0.000 claims 1
- 229910052791 calcium Inorganic materials 0.000 claims 1
- 239000011575 calcium Substances 0.000 claims 1
- 239000012535 impurity Substances 0.000 claims 1
- 239000004571 lime Substances 0.000 claims 1
- 235000013336 milk Nutrition 0.000 claims 1
- 239000008267 milk Substances 0.000 claims 1
- 210000004080 milk Anatomy 0.000 claims 1
- 238000000926 separation method Methods 0.000 claims 1
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 239000000835 fiber Substances 0.000 description 18
- 238000011068 loading method Methods 0.000 description 4
- 239000013078 crystal Substances 0.000 description 3
- 239000002657 fibrous material Substances 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000000376 reactant Substances 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 229920003043 Cellulose fiber Polymers 0.000 description 1
- 229920006320 anionic starch Polymers 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 210000002421 cell wall Anatomy 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 206010016256 fatigue Diseases 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 239000012764 mineral filler Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000010893 paper waste Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000013055 pulp slurry Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 239000011882 ultra-fine particle Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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
- 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
- D21H21/50—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 form
- D21H21/52—Additives of definite length or shape
Definitions
- the invention relates to a method according to the preamble of claim 1.
- 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 combined with carbon dioxide at the same time subjected to a shear mixing process to produce a fiber material with a substantial amount of calcium carbonate on the fiber surface, in the hollow interior and within the fiber walls of the cellulose fibers.
- This loading of the fibers with fillers 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.
- Another advantage of using this technology is that it can be easily processed in a calender.
- 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%.
- the method it is possible to also produce such calcium carbonate particles, which are larger than usual methods.
- a crystallization is triggered in which accumulates calcium carbonate around the crystallization nuclei.
- the calcium carbonate can form clusters. If the process is carried out favorably, the effect of this calcium carbonate addition is driven so far that a complete envelopment of the crystallization nuclei takes place.
- the crystallization nuclei which can be used here are not necessarily ultrafine particles, as they are usually used for triggering and controlling crystal growth. Rather, it is advantageous that the size of the crystallization nuclei can be adjusted very easily by suitable measures. Since these are added substances, they can first be adjusted to the desired size or the desired size spectrum by selection of the raw materials and then by appropriate treatment, for example milling.
- the crystallization nuclei suitable for the process can be procured relatively inexpensively, preferably they are negatively charged fines (e.g., dead-milled fiber fragments) or fine contaminants, such as are produced in the stock preparation in front of the paper or board machine anyway. But it can also be e.g. fine wood particles, polyamides, retention aids, anionic starches or anionic salts. In many stock preparation plants, especially when waste paper is processed, there are anyway enough fine-particle-like residues, which often have a disturbing influence on the production or quality of the paper produced. Such particles are e.g. in wash filtrates, rejects on cleaners or sorters, or the filtrates of reject thickening.
- the starting material used for the process is either a fiber-free water-containing liquid with 0.1 to 30% solids or a pulp suspension if the carbonate is to be produced in the presence of fibers.
- the liquid is introduced into a reactor together with the crystallization seeds and calcium hydroxide.
- the addition of gaseous or dissolved carbon dioxide forms calcium carbonate.
- additional calcium hydroxide or calcium oxide in aqueous and / or solid form may also be mixed into the reactor.
- 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.
- Fig. 1 is a plant diagram for illustrating the method according to the invention
- Fig. 2 system diagram for a specific application of the method.
- a favorable embodiment of the method according to the invention is shown in a plant scheme.
- Water-containing liquid water W
- water W Water-containing liquid
- crystallization seeds 1 calcium hydroxide is liquid or dry, for example, as here in the form of milk of lime (MOL), added to the container 2.
- MOL milk of lime
- MOL Kalklösch Surprise 3 is provided. If necessary, the milk of lime can be ground in a grinding device 14, for example a ball or agitator ball mill.
- the liquid 4 with water, crystallization nuclei and calcium hydroxide is dissolved in pumped a reactor 5.
- gaseous carbon dioxide CO 2 is added in the reactor 5 .
- the gas is provided here in a CO 2 supply device 16, wherein it is also possible to heat it in a CO 2 heater 17.
- a suitable reactor 5 is, for example, a closed container provided with a stirrer 7. Due to the movements of the contents, the reactants can easily come into contact, so that the calcium carbonate-containing filler suspension 6 is formed.
- the filler suspension 6 enters a finishing unit, e.g. a storage tank 13. In this it can be mixed with an aqueous suspended pulp 12, which comes from the stock preparation plant. The mixture 15 thus formed is then used in another part of the plant not shown here for paper or board production.
- a finishing unit e.g. a storage tank 13.
- the mixture 15 thus formed is then used in another part of the plant not shown here for paper or board production.
- FIG. 2 shows an application of the method in which the crystallization nuclei 1 originate from the wash filtrate of the stock preparation plant for the fiber suspension S1.
- the latter is shown only in part, namely a hydrocyclone 8, a sorter 9 and a washing device 10.
- a fine-containing filtrate 11 and a washed-out fibrous material 12 ' are formed in a known manner.
- the filtrate 11 can be fed directly into the container 2, since it contains fines, which can serve as crystallization nuclei in carrying out the method according to the invention.
- Addition of calcium hydroxide and processing in the reactor 5 then takes place, for example, similarly as already described and shown in FIG.
- the pulp 12 ' formed in the washing device 10 can be mixed with the filler suspension 6 produced in the reactor 5, for example in the storage tank 13. In others Cases it is further processed before, for example ground or dispersed; in still other cases, it is used without mixing with the filler suspension 6 on.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Paper (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
L'invention concerne un procédé de formation de charges, notamment de carbonate de calcium, dans un liquide contenant majoritairement de l'eau, éventuellement également dans une suspension de fibres. Selon ce procédé, de l'hydroxyde de calcium est mis en contact avec du dioxyde de carbone gazeux, du carbonate de calcium étant formé par une réaction chimique. Pendant cette réaction, la formation de particules de grande taille est favorisée par des germes cristallins (1) sous la forme de fines ou 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.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200710029688 DE102007029688A1 (de) | 2007-06-27 | 2007-06-27 | Verfahren zum Bilden von Füllstoffen, insbesondere Calciumcarbonat in einer Suspension |
DE102007029688.8 | 2007-06-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2009000345A1 true WO2009000345A1 (fr) | 2008-12-31 |
Family
ID=39642674
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2008/001383 WO2009000345A1 (fr) | 2007-06-27 | 2008-02-22 | Procédé de formation de charges, notamment de carbonate de calcium, dans une suspension |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE102007029688A1 (fr) |
WO (1) | WO2009000345A1 (fr) |
Cited By (2)
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 |
EP3221512A4 (fr) * | 2014-11-19 | 2018-04-25 | Stora Enso Oyj | Procédé de production d'une charge |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
WO2002086238A1 (fr) * | 2001-04-24 | 2002-10-31 | M-Real Oyj | Charge et son procede de production |
US20040108082A1 (en) * | 2002-12-09 | 2004-06-10 | Specialty Minerals (Michigan) Inc. | Filler-fiber composite |
WO2005005726A1 (fr) * | 2003-07-15 | 2005-01-20 | Upm-Kymmene Corporation | Procede de fabrication de papier et papier |
WO2005121447A1 (fr) * | 2004-06-11 | 2005-12-22 | Imerys Minerals Limited | Traitement de la pate a papier |
US20060032596A1 (en) * | 2002-10-24 | 2006-02-16 | Markku Leskela | Method for producing fiber product |
-
2007
- 2007-06-27 DE DE200710029688 patent/DE102007029688A1/de not_active Withdrawn
-
2008
- 2008-02-22 WO PCT/EP2008/001383 patent/WO2009000345A1/fr active Application Filing
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
WO2002086238A1 (fr) * | 2001-04-24 | 2002-10-31 | M-Real Oyj | Charge et son procede de production |
US20060032596A1 (en) * | 2002-10-24 | 2006-02-16 | Markku Leskela | Method for producing fiber product |
US20040108082A1 (en) * | 2002-12-09 | 2004-06-10 | Specialty Minerals (Michigan) Inc. | Filler-fiber composite |
WO2005005726A1 (fr) * | 2003-07-15 | 2005-01-20 | Upm-Kymmene Corporation | Procede de fabrication de papier et papier |
WO2005121447A1 (fr) * | 2004-06-11 | 2005-12-22 | Imerys Minerals Limited | Traitement de la pate a papier |
Cited By (5)
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 |
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 |
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 |
EP3221512A4 (fr) * | 2014-11-19 | 2018-04-25 | Stora Enso Oyj | Procédé de production d'une charge |
US11193241B2 (en) | 2014-11-19 | 2021-12-07 | Stora Enso Oyj | Method of producing a filler |
Also Published As
Publication number | Publication date |
---|---|
DE102007029688A1 (de) | 2009-01-02 |
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