FI90448C - Method in papermaking - Google Patents
Method in papermaking Download PDFInfo
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- FI90448C FI90448C FI894075A FI894075A FI90448C FI 90448 C FI90448 C FI 90448C FI 894075 A FI894075 A FI 894075A FI 894075 A FI894075 A FI 894075A FI 90448 C FI90448 C FI 90448C
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- colloid
- process according
- aluminate
- anionic
- dewatering
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- 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
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- 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
- D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/41—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing ionic groups
- D21H17/44—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing ionic groups cationic
- D21H17/45—Nitrogen-containing groups
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- 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
- D21H17/68—Water-insoluble compounds, e.g. fillers, pigments siliceous, e.g. clays
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- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Paper (AREA)
- Making Paper Articles (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
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Abstract
Description
9044890448
Menetelma paperinvalmistuksessa -satt vid framstailning av papperMethod in papermaking -satt vid framstailning av papper
Tama keksintO koskee menetelmaa paperinvalmistuksessa kayttamana parannettua retentio- ja vedenpoistojOrjes-telmaa. KeksintO koskee erityisemmin kationisesta syn-teettisesta polymeerista, anionisesta epaorgaanisesta kol-loidista ja aluminaatista koostuvan yhdistelman k3yttamis-ta retentio- ja vedenpoistojarjestelm3na paperinvalmistuksessa .This invention relates to an improved retention and dewatering system for use in papermaking. More particularly, the invention relates to the use of a combination of a cationic synthetic polymer, an anionic inorganic colloid and aluminate as a retention and dewatering system in papermaking.
On aikaisemmin tunnettua kayttaa kationisista retentioai-neista ja epaorgaanisista kolloideista koostuvia yhdistel-mi3 retentio- ja vedenpoistoaineina paperinvalmistuksessa. Eurooppalaisessa patenttihakemuksessa 0218674 on esitetty polyakryyliamidin k3yttamista yhdessa anionisten silikasoo-lien kanssa sideaineena ja retentioaineena. Oletetaan etta kolloidiset hiukkaset sooleissa voimakkaalla varauksellaan aikaansaavat siltasidoksen polymeerisissa retentioaineissa ja etta t3m3n ansiosta saavutetaan erittain hyv3 retentio-ja vedenpoistovaikutus. GB-patenttijulkaisun 2015614 kaut-ta on myOs aikaisemmin tunnettua kayttaa polymeerisia ka-tionisia retentioaineita yhdessa polyaluminiumyhdisteiden kanssa. Edelleen on US-patenttijulkaisun 4643801 kautta tunnettua kayttaa sideaineena paperinvalmistuksessa yhdis-telmaa, jossa on kationista tarkkelysta, anionista silika-soolia ja anionista suurmolekyylista polymeeria, erityisesti anionista polyakryyliamidia. US-patenttijulkaisun mukaista kolmikomponenttij3rjestelmaa voidaan kayttaa lisaamaiia sii-hen edelleen aluminiumyhdisteita, alunaa, natriumaluminaat-tia tai polyhydroksialuminiumkloridia.It is previously known to use combinations of cationic retention aids and inorganic colloids as retention and dewatering agents in papermaking. European Patent Application 0218674 discloses the use of polyacrylamide in combination with anionic silica salts as a binder and retention aid. It is assumed that the colloidal particles in the sols with their strong charge provide a bridging bond in the polymeric retention aids and that a very good retention and dewatering effect is achieved thanks to t3m3. It is also previously known from GB 2015614 to use polymeric cationic retention aids in combination with polyaluminum compounds. Furthermore, it is known from U.S. Pat. No. 4,643,801 to use as a binder in papermaking a combination of cationic starch, anionic silica sol and an anionic high molecular weight polymer, especially anionic polyacrylamide. The ternary system of U.S. Pat. No. 4,847,607 may further comprise aluminum compounds, alum, sodium aluminate or polyhydroxyaluminum chloride.
Tam3n keksinnOn mukaisesti on osoittautunut, etta retentio- ja vedenpoistovaikutus paperinvalmistuksessa tehostuu silloin kun aluminaattia k3ytet33n yhdessa kationisen, synteettisen polymeerin ja anionisen ep3orgaanisen kolloi-din kanssa. Koska vedenpoistovaikutus kasvaa voidaan pape- 2 90448 rikoneen nopeutta nostaa ja tamSn lisaksi vahemman vetta on kuivatettava pols paperikoneen kuivausosassa.According to this invention, it has been shown that the retention and dewatering effect in papermaking is enhanced when aluminate is used in combination with a cationic synthetic polymer and an anionic inorganic colloid. As the dewatering effect increases, the speed of the paper machine can be increased and, in addition, less water must be dried in the drying section of the paper machine.
T3ma keksintO koskee siis menetelmaa paperinvalmistuksessa muodostamalla suspensio selluloosaa sisaitavista kuiduista ja mahdollisista tayteaineista ja poistamalla vesi siita viiralla, jolloin muodostaminen ja vedenpoisto tapahtuu anionisen epaorgaanisen kolloidin, aluminaatin ja katio-nisen synteettisen polymeerin iasn3ollessa.The present invention thus relates to a process for papermaking by forming a suspension of cellulose-containing fibers and possible fillers and dewatering it with a wire, the formation and dewatering taking place in the presence of an anionic inorganic colloid, aluminate and a cationic synthetic polymer.
N3m3 kolme komponenttia voidaan lisata kuitumassaan mieli-valtaisessa jarjestyksessa. Paras vaikutus saavutetaan jos aluminaatti ensin lisataan kuitumassaan, jonka jalkeen ka-tioninen synteettinen polymeeri ja tam3n jalkeen anioninen ep3orgaaninen kolloidi lisataan. Huomattava parannus tun-nettuun tekniikkaan verrattuna saavutetaan myds jos anioninen ep3orgaaninen kolloidi lisataan kuitumassaan ensin, jota seuraavat kationinen polymeeri ja aluminaatti mielivaltaisessa jarjestyksessa. N3iden kolmen komponent-tien erillista lisaamista pidet33n sopivimpana vaikkakin on olemassa mahdollisuus esisekoittaa kaksi komponenttia ennen lisaamista.The three components of N3m3 can be added to their fiber mass in an arbitrary order. The best effect is obtained if the aluminate is first added to the pulp, after which the cationic synthetic polymer and after that the anionic inorganic colloid are added. A considerable improvement over the prior art is achieved myds if the anionic inorganic colloid is added to its pulp first, followed by the cationic polymer and aluminate in arbitrary order. The separate addition of the three components of the N3 is considered to be the most suitable, although there is the possibility of premixing the two components before the addition.
Kationisiksi synteettisiksi polymeereiksi sopivat keksin-nfin mukaisesti sellaiset kationiset, orgaaniset typpea si-saitavat polymeerit, joita normaalisti kaytetaan paperinvalmistuksessa retentionaineina ja/tai m3rkaiujuutta lisaavina aineina. Erityisen sopivia ovat kationiset polyak-ryyliamidit, polyetyleeniminit, polyamiini- ja polyamidoa-miinihartsit jne. Polyamiinihartseja ja polyamidoamiinihart-seja kaytetaan sopivimmin epikloorihydriinimuunnetussa muo-dossa. Muita k3ytett3via kationisia synteettisia polymeereja ovat kationiset melamiiniformaldehydi- ja ureaformaldehydimarkalujitehartsit. Kationisen synteettisen polymeerin maar3n on oltava 0,01 - 3 paino%, sopivimmin 0,03 - 2 paino%, kuivista kuiduista ja mahdollisesta tayteainees-ta laskettuna.Suitable cationic synthetic polymers according to the invention are those cationic, organic nitrogen-containing polymers which are normally used in papermaking as retention aids and / or as resilience enhancers. Particularly suitable are cationic polyacrylamides, polyethyleneimines, polyamine and polyamidoamine resins, etc. Polyamine resins and polyamidoamine resins are preferably used in the epichlorohydrin-modified form. Other cationic synthetic polymers used include cationic melamine formaldehyde and urea formaldehyde brand strength resins. The weight of the cationic synthetic polymer should be 0.01 to 3% by weight, preferably 0.03 to 2% by weight, based on the dry fibers and any filler.
3 90448 K3ytettyj3 anionisia epSorgaanisia kolloideja on tunnetus-ti kaytetty aikaisemmin paperinvalmistuksen yhteydessa. Esimerkkeina tailaisista voidaan mainita montmorilloniit-ti, bentoniitti, titanyylisulfaattisoolit, silikasoolit, aluminiummuunnetut silikasoolit tai aluminiumsilikaattisoo-• lit. K3sitteet kolloidi ja kolloidaalinen tarkoittavat hy- vin pienia hiukkasia. Anionisten aineiden hiukkasten omi-3,90448 The anionic inorganic colloids used have been known to be used in the past in papermaking. Examples of such compounds are montmorillonite, bentonite, titanyl sulphate sols, silica sols, aluminum-modified silica sols or aluminum silicate sols. The terms colloid and colloidal refer to very small particles. Particles of anionic substances
OO
naispinnan on oltava suurempi kuin noin 50 m-Vg, edulli-semmin suurempi kuin 100 m2/g ja sopivimmin 50 - 1000 m2/g. Silikaan perustuvia kolloideja pidetaan sopivimpina anio-nisena ep3orgaanisena kolloidina.the female surface should be greater than about 50 m-Vg, more preferably greater than 100 m 2 / g, and most preferably 50 to 1000 m 2 / g. Silica-based colloids are considered to be the most suitable anionic ep3organic colloid.
Erityisen sopivia silikaan perustuvia kolloideja ovat ne silikasoolit, joissa on kolloidaalisia hiukkasia, jotka on esitetty eurooppalaisessa patenttijulkaisussa 41056, joka liitetaan viitteena tahan hakemukseen, ja ne aluminiumia sisaitavat silikasoolit, jotka on esitetty eurooppalaisessa patenttijulkaisussa 0218674, joka samaten liitetaan viitteena. N3iden soolien kolloidaalisen silikan ominaispinnan on sopivimmin oltava 50-1000 m2/g ja mieluummin noin 100-1000 m2/g, jolloin parhaimmat tulokset on saatu silloin kun ominaispinta on ollut noin 300-700 m2/g. On todettu, etta kolloidaalisten silikahiukkasten keskihiukkaskoon on oltava alle 20 nm ja sopivimmin noin 10 nmrsta aina alas noin 1 nm:n asti (kolloidaalinen silikahiukkanen, jonka ominaispinta on noin 550 m2/g, vastaa keskihiukkaskokoa, joka on noin 5 nm). Hyvia tuloksia saavutetaan kaytetta-ess3 mainittuja silikasooleja alkalistabiloidun soolin muo-dossa, joka sisaitaa noin 2-60 paino% Si02:ta, sopivimmin noin 4-30 paino% Si02:ta. Silikasooli voidaan stabiloida alkalilla moolisuhteessa Si02:M20, joka on 10:1 - 300:1, sopivimmin 15:1 - 100:1 (M on ioni ryhm3sta Na, K, Li ja NH4). Kuten edelia on esitetty saavutetaan erittain hyvia tuloksia kaytettaessa kolloidaalisia hiukkasia, joissa ai-nakin pintakerros on aluminiumsilikaattia tai aluminium-muunnettua silikasoolia niin, etta hiukkasten pintaryhmat 4 90448 sisaitavat pii- ja alumiiniatomeja suhteessa 9,5:0,5 -7,5:2,5 ja ilmoitetut pinnat ja hiukkaskoot koskevat mySs naita silikasooleja. Sellaisia silikasooleja, jotka tayttavat edelia mainitut spesifikaatiot, on kaupallisesti saatavana esimerkiksi Eka Nobel AB:n kautta.Particularly suitable silica-based colloids are those silica sols having colloidal particles disclosed in European Patent Publication No. 41056, which is incorporated herein by reference, and those aluminum-containing silica sols disclosed in European Patent Publication No. 0218674, which is also incorporated herein by reference. The colloidal silica specific surface area of the N3 sols should preferably be 50-1000 m2 / g, and more preferably about 100-1000 m2 / g, with the best results being obtained when the specific surface area has been about 300-700 m2 / g. It has been found that colloidal silica particles must have a mean particle size of less than 20 nm and preferably from about 10 nm up to about 1 nm (a colloidal silica particle with a specific surface area of about 550 m 2 / g corresponds to a mean particle size of about 5 nm). Good results are obtained using said silica sols in the form of an alkali-stabilized sol containing about 2 to 60% by weight of SiO 2, preferably about 4 to 30% by weight of SiO 2. The silica sol can be stabilized with alkali in a molar ratio of SiO 2: M 2 O of 10: 1 to 300: 1, preferably 15: 1 to 100: 1 (M is an ion from Na, K, Li and NH 4). As stated above, very good results are obtained when using colloidal particles in which at least the surface layer is aluminum silicate or Aluminum-modified silica sol, so that the surface groups of the particles 4 90448 contain silicon and aluminum atoms in a ratio of 9.5: 0.5 to 7.5: 2 , 5 and the reported surfaces and particle sizes apply to MySs these silica sols. Silica sols that meet the aforementioned specifications are commercially available, for example, through Eka Nobel AB.
Kuitumassaan lisattavan anionisen kolloidin maaran on ol-tava 0,005 ja 2 paino%:n, sopivimmin 0,01 ja 0,4 paino%:n vaiilia kuivista selluloosakuiduista ja mahdolisesta tay-teaineesta laskettuna. Kolloidin, sopivimmin kolloidaali-sen silikan pitoisuus kuitumassaan lisattavassa soolissa ei ole kriittinen. Kaytanndllisesta nakflkohdasta on sopivaa, etta soolien pitoisuus kuitumassaan annostettaessa on 0,05 ja 5,0 paino%:n vaiilia.The amount of anionic colloid to be added to the pulp must be 0.005 and 2% by weight, preferably 0.01 and 0.4% by weight, based on the dry cellulosic fibers and possible filler. The concentration of colloid, preferably colloidal silica, in the sol added to the pulp is not critical. From the point of view of use, it is suitable that the concentration of sols when added to the fibrous mass is 0.05 and 5.0% by weight of wool.
Aluminaatilla tarkoitetaan alkaalimetallialuminaattia, jota sinansa on hyvin tunnetusti kaytetty paperinvalmistuk-sen yhteydessa, erityisesti mantyhartsilla hydrofoboitaes-sa. Sopivimmin kaytetaan natriumaluminaattia (Na2Al204), mutta on tietenkin myds mahdollista kayttaa kaliumalumi-naattia vaikkakin se kustannuksiltaan on vahemm3n edullis-ta. Aluminaatin maara voi vaihdella laajoissa rajoissa. Aluminaatti lisataan sopivimmin kuitumassaan vesiliuoksien muodossa, joissa pitoisuus ei ole kriittinen vaan sopeute-taan kaytannOllisten perusteiden mukaan. Keksinndn mukaan on osoittautunut, etta jo hyvin pienelia aluminaattimaarai-la, anionisen epaorgaanisen kolloidin maaraan verrattuna, saavutetaan huomattava vedenpoistovaikutuksen parannus. Parannus saavutetaan Al203:na lasketun aluminaatin ja epaorgaanisen kolloidin painosuhteen ollessa 0,01:1. Yia-raja ei ole kriittinen. Mitaan mainitsemisenarvoista pa-rannusta ei kuitenkaan saavuteta silloin, kun aluminaatin ja epaorgaanisen kolloidin vaiinen suhde on suurempi kuin 3:1. Suhde on edullisesti 0,02:1 ja 1,5:1 vaiilia, sopivimmin 0,05:1 ja 0,7:1 vaiilia. Kaikki esitetyt suhteet koskevat Al203:na lasketun aluminaatin ja epaorgaanisen kolloidin vMlista painosuhdetta.By aluminate is meant an alkali metal aluminate which is well known in the art of papermaking, especially in hydrophobitating with mantle resin. Sodium aluminate (Na 2 Al 2 O 4) is most preferably used, but it is of course possible to use potassium aluminate, although at a lower cost. The amount of aluminate can vary within wide limits. The aluminate is preferably added to the pulp in the form of aqueous solutions, the concentration of which is not critical but is adapted according to practical criteria. According to the invention, it has been found that even a very small amount of aluminate, compared to the amount of anionic inorganic colloid, achieves a considerable improvement in the dewatering effect. The improvement is achieved with a weight ratio of aluminate to inorganic colloid calculated as Al 2 O 3 of 0.01: 1. The Yia limit is not critical. However, no significant improvement is achieved when the silent ratio of aluminate to inorganic colloid is greater than 3: 1. The ratio is preferably 0.02: 1 to 1.5: 1 vile, most preferably 0.05: 1 to 0.7: 1 vile. All ratios shown relate to the weight ratio of aluminate to inorganic colloid calculated as Al 2 O 3.
5 904485,90448
Keksinnfin mukaisen jarjestelman parannettu retentio- ja vedenpoistovaikutus saavutetaan kuitumassan laajalla pH-vSlilia. pH voi olla alueella, joka ulottuu noin arvos-ta 4 noin arvoon 10. pH on sopivimmin yli 5 ja mieluummin vSlilia 6-9. Jos haluttua pH-arvoa ei saavuteta lisaamålia aluminaattiliuos, joka sinansa on alkalinen, voidaan kuitumassan pH:ta saataa lisaamaiia esimerkiksi natriumhyd-roksidia. Silloin kun kaytetaan alkalisesti puskuroivaa tayteainetta, kuten liitua, saavutetaan normaalisti halut-tu pH ilman saatoa. On tietenkin myfis mahdollista kayttaa muitakin tayteaineita kuin liitua mutta silloin on huoleh-dittava siita, etta kuitumassan pH-arvo pysyy edelia esi-tetyissa rajoissa.The improved retention and dewatering effect of the system according to the invention is achieved with a wide pH of the pulp. The pH may range from about 4 to about 10. The pH is preferably above 5 and more preferably from 6 to 9. If the desired pH is not reached with additional aluminate solution, which is itself alkaline, additional pH, for example sodium hydroxide, can be obtained at the pH of the pulp. When an alkaline buffering filler such as chalk is used, the desired pH is normally reached without yield. Of course, it is possible to use fillers other than chalk, but care must then be taken to ensure that the pH of the pulp remains within the limits set out above.
Keksinnfin mukaiseen paperinvalmistukseen voi sisaitya ta-vallista tyyppia olevia mineraalitayteaineita, esimerkiksi kaoliinia, titaanioksidia, kipsia, liitua ja talkkia. Kfi-sitteeseen "mineraalitayteaine" sisaityy tassa yhteydessa naiden tayteaineiden lisaksi myfis wollastoniitti ja lasi-kuidut ja myfis mineraaliset pientiheystayteaineet, kuten paisutettu perliitti. Mineraalitayteaine lisataan tavalli-sesti vesilietteen muodossa niilia pitoisuuksilla, joita kaytetaan tailaisia tayteaineita vårten. Tayteainetta voidaan mahdollisesti ennen kuitumassaan lisaamista kasitelia keksinnfin mukaisen vedenpoisto- ja retentiojarjestelman komponenteilla, esimerkiksi kationisella synteettiselia polymeerilia ja aluminaatilla tai epaorgaanisella anioni-sella kolloidilla, jonka jaikeen jaannfiskomponentti lisataan kuitumassaan.The papermaking according to the invention may contain mineral fillers of the usual type, for example kaolin, titanium oxide, gypsum, chalk and talc. The term "mineral filler" in this context includes, in addition to these fillers, myfis wollastonite and glass fibers and myfis low density mineral fillers such as expanded perlite. The mineral filler is usually added in the form of an aqueous slurry at the concentrations of nile used for such fillers. Optionally, the filler may be treated with the components of the dewatering and retention system of the invention, for example cationic synthetic polymer and aluminate, or an inorganic anionic colloid, the fraction of which is added to the pulp.
Keksinnfin mukaista kolmikomponenttijarjestelmaa voidaan kayttaa paperia valmistettaessa erityyppisista, selluloosa-pitoisia kuituja sisaitfivista kuitumassoista. Kuitumassojen on sisailettava ainakin 50 paino% selluloosaa sisaitavia kuituja. Kolmikomponenttijarjestelmaa voidaan esimerkiksi kayttaa kemiallisen massan, kuten sulfaatti-ja sulfiittimas- 6 90448 san, kuumahierteen, raffinOOrimassan tai sekå lehti- etta havupuun puuhiokkeen kuiduista muodostettuja kuitumassoja vårten. Sita voidaan tietenkin myds kayttaa uusiokuiduista muodostettuja kuitumassoja vårten. Tassa yhteydessa kaytet-tSviin termeihin paperi ja paperinvalmistus ei tietenkaan sisally ainoastaan paperi ja sen valmistus, vaan myds muut selluloosakuitupitoiset arkit tai ratamuotoiset tuotteet, kuten selluloosa-arkit, pahvi ja kartonki ja niiden valmistus .The three-component system according to the invention can be used in the production of paper from different types of cellulosic fibers. The pulps must contain at least 50% by weight of fibers containing cellulose. The three-component system can be used, for example, for chemical pulps such as sulphate and sulphite pulps, hot mills, refined pulps or both pulps formed from hardwood pulpwood fibers. It can, of course, also be used for pulps formed from recycled fibers. In this context, the terms paper and papermaking used do not, of course, include only paper and its manufacture, but also other cellulosic fibrous sheets or web-shaped products such as cellulose sheets, cardboard and paperboard and their manufacture.
KeksinnOn mukainen menetelma voidaan vieda lapi sinansa tunnetulla tavalla ja lisaamaiia kuitumassaan muita tun-nettuja lisaaineita, kuten hydrofobointiaineita jne.The method according to the invention can be applied in a manner known per se and other known additives, such as hydrophobing agents, etc., can be added to the fiber mass.
Keksintda havainnollistetaan lahemmin seuraavassa raken-ne-esimerkissa, jossa osat ja prosentit koskevat paino-osia ja painoprosentteja, mikali muuta ei ole ilmoitettu.The invention is more particularly illustrated in the following structural example, in which parts and percentages are by weight unless otherwise indicated.
Esimerkki 1Example 1
Seuraavissa kokeissa on vedenpoistovaikutusta tutkittu "Canadian Freeness Tester"-laitteen avulla, joka on tavan-omainen menetelma vedenpoistokyvyn karakterisoimiseksi SCAN-C 21:65 mukaisesti.In the following experiments, the dewatering effect has been investigated using the "Canadian Freeness Tester", which is a conventional method for characterizing the dewatering ability according to SCAN-C 21:65.
Kuitumassa perustui valkaistuun koivu/mantysulfaattimas-saan (60:40) ja sisalsi 30 paino% liitua. Kuitumassan pH oli 8,5 ja sen CSF oli 300 ml.The pulp was based on bleached birch / mantysulfate pulp (60:40) and contained 30% by weight chalk. The pulp had a pH of 8.5 and a CSF of 300 ml.
Taulukossa ilmoitetut kemikaalilisayksien maarat koskevat tonneja kuivaa kuitumassajarjestelmaa (kuituja + tayteai-neita). Anioninen kolloidi oli alkalistabiloitu silikasoo-li, jonka pinta oli 500 m2/g. Kationinen synteettinen po-lymeeri oli kationinen polyakryyliamidi, jonka kationisuus oli keskitasoa, jota myy Allied Colloids nimelia Percol 292. Natriumaluminaatti lisattiin 0,025%:sen vesiliuoksen 7 90448 muodossa ja ilmoitetut aluminaattimaSrat on ilmaistu ki-loina Al203:ta_The chemical additive levels given in the table refer to tonnes of dry pulp (fibers + fillers). The anionic colloid was an alkali-stabilized silica sol with a surface area of 500 m 2 / g. The cationic synthetic polymer was a medium cationic polyacrylamide with a medium cationicity sold by Allied Colloids under the name Percol 292. Sodium aluminate was added in the form of 0.025% aqueous solution 7,90448 and the reported aluminate masses are expressed in kilos of Al 2 O 3.
KemikaalilisSykset tehtiin 1 litraan laimennettua kuitu-massaa (noin 0,3%:nen) 15 sekunnin vSlein sekoittaessa jSrjestyksessS aluminaatti, kationinen polymeeri, epåor-gaaninen kolloidi. Flokattu kuitumassa siirrettiin "free-ness"-laitteeseen ja mittauksia tehtiin 15 sekuntia vii-meisen lisSyksen jaikeen. KerScSntyny t vesi on vedenpoisto-kyvyn mitta ja ilmaistaan ml:na Canadian Standard Freeness (CSF)· Vesi, joka saatiin kokeissa kSyttaen kolmea em. komponenttia oli hyvin kirkas ja osoitti, ettS samanaikai-sesti saavutetaan hyv3 retentiovaikutus flokkeihin kiinnit-tyvSn hienokuituaineksen osalta.Chemical additions were made to 1 liter of diluted pulp (about 0.3%) every 15 seconds with agitation of aluminate, cationic polymer, inorganic colloid. The flocculated pulp was transferred to a "free-ness" device and measurements were made for 15 seconds on the last lisseys jaike. Accumulated water is a measure of dewatering ability and is expressed in ml Canadian Standard Freeness (CSF) · The water obtained in the experiments using the three components was very clear and showed that a good retention effect on the fine fiber adhering to the flocs is achieved at the same time.
Koe Al203 Kat. polymeeri An. kolloidi CSFKoe Al203 Cat. polymer An. colloid CSF
no._kq/t_kq/t_kq/t_ml 1 - - 300 2 - 0,3 - 370 3 0,6 - 385 4 0,9 - 390 5 0,15 - - 290 6 0,15 0,3 - 350 7 - 1,0 295 8 0,15 - 1,0 290 9 - 0,3 0,5 420 10 - 0,3 1,0 430 11 - 0,3 1,5 440 12 0,075 0,3 0,5 495 13 0,15 0,3 1,0 520 14 0,225 0,3 1,5 515 15 - 0,6 0,5 425 16 - 0,6 1,0 490 17 - 0,6 1,5 510 18 0,075 0,6 0,5 495 19 0,15 0,6 1,0 570 20 0,225 0,6 1,5 585 8 90448no._kq / t_kq / t_kq / t_ml 1 - - 300 2 - 0.3 - 370 3 0.6 - 385 4 0.9 - 390 5 0.15 - - 290 6 0.15 0.3 - 350 7 - 1.0 295 8 0.15 - 1.0 290 9 - 0.3 0.5 420 10 - 0.3 1.0 430 11 - 0.3 1.5 440 12 0.075 0.3 0.5 495 13 0.15 0.3 1.0 520 14 0.225 0.3 1.5 515 15 - 0.6 0.5 425 16 - 0.6 1.0 490 17 - 0.6 1.5 510 18 0.075 0, 6 0.5 495 19 0.15 0.6 1.0 570 20 0.225 0.6 1.5 585 8 90448
Kuten taulukosta ilmenee, saavutetaan jo hyvin pienten alu-minaattimSarien kayttamiselia oleellisesti parannettu ve-denpoistokyky kationisen polymeerin ja anionisen kolloidin muodostaman jarjestelman osalta. Vastaavaa aluminaatin vaikutusta ei ilmene jos sita kaytetaan yksinomaan yhdessa kationisen polymeerin tai anionisen kolloidin kanssa.As can be seen from the table, the use of even very small aluminate series results in a substantially improved dewatering capacity for the cationic polymer and anionic colloid system. A similar effect of aluminate does not occur if it is used exclusively in combination with a cationic polymer or an anionic colloid.
Esimerkkl 2 T3ma esimerkki vastasi taysin esimerkkia l silia ainoalla erolla, etta kaytettiin toisia kationisia synteettisia po-lymeereja. N3m3 olivat A) epikloorihydriinimuunnettu poly-amidoamiinihartsi, jota myy Hercules Inc. nimelia Kymene 557 H ja B) muunnettu polyamiinihartsi, jota myy Hercules Inc. nimelia Delfloc-50.Example 2 This example corresponded exactly to Example 1 Silia with the only difference that other cationic synthetic polymers were used. N3m3 were A) epichlorohydrin-modified polyamidoamine resin sold by Hercules Inc. under the name Kymene 557 H and B) modified polyamine resin sold by Hercules Inc. under the name Delfloc-50.
Koe AI2O3 Kat. polymeeri An. kolloidi CSFKoe AI2O3 Cat. polymer An. colloid CSF
no._kq/t_tyyppi; kq/t_kq/t_ml 1 - - 300 2 - A; 0,6 - 305 3 - A; 1,2 - 315 4 - A; 2,4 - 315 5 - A; 1,2 0,5 325 6 - A; 1,2 1,0 330 7 - A; 1,2 1,5 310 8 0,075 A; 1,2 0,5 360 9 0,15 A; 1,2 1,0 390 10 0,225 A; 1,2 1,5 410 11 0,30 A; 1,2 2,0 395 12 - B; 1,2 - 290 13 - B; 1,2 1,5 280 14 0,225 B; 1,2 1,5 335 9 90448no._kq / t_tyyppi; kq / t_kq / t_ml 1 - - 300 2 - A; 0.6 - 305 3 - A; 1.2 - 315 4 - A; 2.4 - 315 5 - A; 1.2 0.5 325 6 - A; 1.2 1.0 330 7 - A; 1.2 1.5 310 8 0.075 A; 1.2 0.5 360 9 0.15 A; 1.2 1.0 390 10 0.225 A; 1.2 1.5 410 11 0.30 A; 1.2 2.0 395 12 - B; 1.2 - 290 13 - B; 1.2 1.5 280 14 0.225 B; 1.2 1.5 335 9 90448
Esimerkki 3 TSssa kokeessa kSytettiin hiokekuitumassaa, joka ei sisSl-tSnyt tayteaineita. Kuitumassaan oli lisatty 0,5 g/1 Na2S04.10H20:ta ionivahvuuden saattamiseksi sellaiselle • tasolle, etta se vastaa kaytannOssa esiintyvaa. Kationinen polymeeri oli samaa polyakryyliamidia kuin esimerkissa 1. Anioninen kolloidi oli aluminiummuunnettua, 15% alkali-stabiloitua silikasoolia, jossa kolloidaalisten hiukkasten pinta oli muunnettu 9%:11a Al-atomeja ja hiukkasten pinta oli 500 m2/g. Lisaysjarjestys oli natriumaluminaatti, kationinen polymeeri, jota seurasi anioninen kolloidi. Kokeet suoritettiin seka kuitumassan pH-arvolla 6 etta pH-arvolla 7,5, jossa pH-arvoa oli saadetty laimennetulla H2S04:lla vast, laimennetulla NaOH:lla.Example 3 In this experiment, a ground fiber pulp was used which did not contain fillers. 0.5 g / l Na 2 SO 4 .10H 2 O had been added to the pulp to bring the ionic strength to a level • similar to that in use. The cationic polymer was the same polyacrylamide as in Example 1. The anionic colloid was an aluminum-modified, 15% alkali-stabilized silica sol in which the surface of the colloidal particles was modified with 9% of Al atoms and the surface area of the particles was 500 m 2 / g. An additional sequence was sodium aluminate, a cationic polymer followed by an anionic colloid. The experiments were performed at both pH 6 and pH 7.5 of the pulp, which had been obtained with dilute H 2 SO 4 or dilute NaOH.
Koe Al203 Kat. polymeeri An. kolloidi CSFKoe Al203 Cat. polymer An. colloid CSF
no._kg/t_kg/t_kg/t_ml ph 6,0 1 - - 120 2 - 0,3 - 190 3 - 0,6 - 220 4 - 0,9 - 245 5 - 1,2 - 250 6 - 0,6 0,5 275 7 - 0,6 1,0 305 8 - 0,6 1,5 300 9 0,075 0,6 0,5 325 10 0,15 0,6 1,0 345 11 0,225 0,6 1,5 350 pH 7,5 12 - 0,6 - 220 13 - 0,6 0,5 245 14 - 0,6 1,0 270 ίο 90 448 15 - 0,6 1,5 275 16 0,075 0,6 0,5 295 17 0,15 0,6 1,0 325 18 0,225 0,6 1,5 340 19 - 0,9 1,5 310 20 0,225 0,9 1,5 370no._kg / t_kg / t_kg / t_ml ph 6.0 1 - - 120 2 - 0.3 - 190 3 - 0.6 - 220 4 - 0.9 - 245 5 - 1.2 - 250 6 - 0.6 0.5 275 7 - 0.6 1.0 305 8 - 0.6 1.5 300 9 0.075 0.6 0.5 325 10 0.15 0.6 1.0 345 11 0.225 0.6 1.5 350 pH 7,5 12 - 0,6 - 220 13 - 0,6 0,5 245 14 - 0,6 1,0 270 ίο 90 448 15 - 0,6 1,5 275 16 0,075 0,6 0,5 295 17 0.15 0.6 1.0 325 18 0.225 0.6 1.5 340 19 - 0.9 1.5 310 20 0.225 0.9 1.5 370
Eslmerkkl 4 TSssa kokeessa kSytettiin kuten esimerkisså 3 hiokekuitu-massaa, johon oli lisatty 0,5 g/1 Na2SO4.l0 H20:ta. Kuitu-massan pH oli 6,5 ja lisatyt kemikaalit olivat natriumalu-minaatti, kationinen polyetyleenimini, jota myy BASF nimel-13 Polymin SK ja anioninen kolloidi, joka muodostui bento-niittikolloidista , jonka ominaispinta vedessa oli noin 400 - 800 m2/g.As in Example 3, ground fiber pulp supplemented with 0.5 g / l Na 2 SO 4 .10 H 2 O was used. The pH of the fibrous pulp was 6.5 and the chemicals added were sodium aluminate, a cationic polyethylene mine sold by BASF harden-13 Polymin SK, and an anionic colloid consisting of benthic rivet colloid having a specific surface area in water of about 400-800 m 2 / g.
Koe Al203 Kat. polymeeri An. kolloidi CSFKoe Al203 Cat. polymer An. colloid CSF
no._kq/t_kq/t_kq/t_ml 1 - - 120 2 0,3 - 175 3 0,6 - 230 4 - 0,9 - 300 5 1,2 - 310 6 - 0,6 0,5 260 7 - 0,6 1,0 280 8 - 0,9 1,0 340 9 0,075 0,6 0,5 295 10 0,15 0,6 1,0 335 11 0,15 0,9 1,0 390no._kq / t_kq / t_kq / t_ml 1 - - 120 2 0.3 - 175 3 0.6 - 230 4 - 0.9 - 300 5 1.2 - 310 6 - 0.6 0.5 260 7 - 0 .6 1.0 280 8 - 0.9 1.0 340 9 0.075 0.6 0.5 295 10 0.15 0.6 1.0 335 11 0.15 0.9 1.0 390
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US4795531A (en) * | 1987-09-22 | 1989-01-03 | Nalco Chemical Company | Method for dewatering paper |
US4927498A (en) * | 1988-01-13 | 1990-05-22 | E. I. Du Pont De Nemours And Company | Retention and drainage aid for papermaking |
SE500367C2 (en) * | 1989-11-09 | 1994-06-13 | Eka Nobel Ab | Silica soles and process for making paper |
WO1993001352A1 (en) * | 1991-07-02 | 1993-01-21 | Eka Nobel Ab | A process for the manufacture of paper |
DE4437118A1 (en) * | 1994-10-05 | 1996-04-11 | Technocell Dekor Gmbh & Co Kg | Base paper for decorative coating systems |
US5846384A (en) * | 1995-06-15 | 1998-12-08 | Eka Chemicals Ab | Process for the production of paper |
SE9502184D0 (en) * | 1995-06-15 | 1995-06-15 | Eka Nobel Ab | A process for the production of paper |
US5595630A (en) * | 1995-08-31 | 1997-01-21 | E. I. Du Pont De Nemours And Company | Process for the manufacture of paper |
SE9504081D0 (en) * | 1995-11-15 | 1995-11-15 | Eka Nobel Ab | A process for the production of paper |
NZ514752A (en) * | 1999-05-04 | 2004-01-30 | Akzo Nobel Nv | Two-step alkalization process for the preparation of silica-based sols |
US7169261B2 (en) | 1999-05-04 | 2007-01-30 | Akzo Nobel N.V. | Silica-based sols |
US6379501B1 (en) | 1999-12-14 | 2002-04-30 | Hercules Incorporated | Cellulose products and processes for preparing the same |
WO2003083212A1 (en) * | 2002-04-03 | 2003-10-09 | Seiko Pmc Corporation | Method for producing paper and agent for improving yield |
FI121119B (en) † | 2003-04-15 | 2010-07-15 | Kemira Oyj | Procedure for making paper |
EP2116391A4 (en) | 2006-12-28 | 2011-03-16 | Tokyo Kinzoku Industry Co Lid | Clip |
CN103556532B (en) * | 2013-10-31 | 2016-01-20 | 东莞理文造纸厂有限公司 | A kind of retention aid for paper making and preparation method thereof |
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SE8403062L (en) * | 1984-06-07 | 1985-12-08 | Eka Ab | PAPER MANUFACTURING PROCEDURES |
SE451739B (en) * | 1985-04-03 | 1987-10-26 | Eka Nobel Ab | PAPER MANUFACTURING PROCEDURE AND PAPER PRODUCT WHICH DRAINAGE AND RETENTION-IMPROVING CHEMICALS USED COTTONIC POLYACRYLAMIDE AND SPECIAL INORGANIC COLLOID |
SE8701252D0 (en) * | 1987-03-03 | 1987-03-25 | Eka Nobel Ab | SET FOR PAPER MAKING |
US4795531A (en) * | 1987-09-22 | 1989-01-03 | Nalco Chemical Company | Method for dewatering paper |
US4927498A (en) * | 1988-01-13 | 1990-05-22 | E. I. Du Pont De Nemours And Company | Retention and drainage aid for papermaking |
SE461156B (en) * | 1988-05-25 | 1990-01-15 | Eka Nobel Ab | SET FOR PREPARATION OF PAPER WHICH SHAPES AND DRAINAGE OWN ROOMS IN THE PRESENCE OF AN ALUMINUM SUBSTANCE, A COTTONIC RETENTION AND POLYMER SILICON ACID |
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AU4084089A (en) | 1990-03-29 |
FI894075A0 (en) | 1989-08-30 |
ES2048323T3 (en) | 1994-03-16 |
BR8904283A (en) | 1990-04-17 |
NO171567B (en) | 1992-12-21 |
CA1334324C (en) | 1995-02-14 |
DE68911626T2 (en) | 1994-04-07 |
SE8803065D0 (en) | 1988-09-01 |
SE467627B (en) | 1992-08-17 |
ATE99010T1 (en) | 1994-01-15 |
PT91611B (en) | 1995-05-31 |
NZ230427A (en) | 1991-06-25 |
DE68911626D1 (en) | 1994-02-03 |
AU605997B2 (en) | 1991-01-24 |
EP0357574B1 (en) | 1993-12-22 |
FI894075A (en) | 1990-03-02 |
NO893500D0 (en) | 1989-08-31 |
JP2521539B2 (en) | 1996-08-07 |
FI90448B (en) | 1993-10-29 |
SE8803065L (en) | 1990-03-02 |
EP0357574A3 (en) | 1991-10-23 |
EP0357574A2 (en) | 1990-03-07 |
JPH0299692A (en) | 1990-04-11 |
NO171567C (en) | 1993-03-31 |
PT91611A (en) | 1990-03-30 |
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