NO154315B - PROCEDURE FOR THE PREPARATION OF A STABLE SUSPENSION OF CALCIUM-MAGNESIUM CARBONATE MIXTURE WITH HIGH SOLID CONTENT AND USE OF THE MIXTURE IN THE PREPARATION OF GLOSSY PAPER. - Google Patents
PROCEDURE FOR THE PREPARATION OF A STABLE SUSPENSION OF CALCIUM-MAGNESIUM CARBONATE MIXTURE WITH HIGH SOLID CONTENT AND USE OF THE MIXTURE IN THE PREPARATION OF GLOSSY PAPER. Download PDFInfo
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- NO154315B NO154315B NO792804A NO792804A NO154315B NO 154315 B NO154315 B NO 154315B NO 792804 A NO792804 A NO 792804A NO 792804 A NO792804 A NO 792804A NO 154315 B NO154315 B NO 154315B
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- Prior art keywords
- calcium
- mixture
- preparation
- magnesium
- paper
- Prior art date
Links
- 239000000203 mixture Substances 0.000 title claims description 14
- HHSPVTKDOHQBKF-UHFFFAOYSA-J calcium;magnesium;dicarbonate Chemical compound [Mg+2].[Ca+2].[O-]C([O-])=O.[O-]C([O-])=O HHSPVTKDOHQBKF-UHFFFAOYSA-J 0.000 title claims description 13
- 239000000725 suspension Substances 0.000 title claims description 12
- 238000000034 method Methods 0.000 title claims description 11
- 239000007787 solid Substances 0.000 title claims description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 15
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 239000000049 pigment Substances 0.000 claims description 11
- 238000010409 ironing Methods 0.000 claims description 9
- 239000010459 dolomite Substances 0.000 claims description 8
- 229910000514 dolomite Inorganic materials 0.000 claims description 8
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 7
- 239000000945 filler Substances 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 238000001354 calcination Methods 0.000 claims description 4
- 239000001569 carbon dioxide Substances 0.000 claims description 4
- 239000002270 dispersing agent Substances 0.000 claims description 4
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 10
- 239000000395 magnesium oxide Substances 0.000 description 6
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 6
- 239000000292 calcium oxide Substances 0.000 description 5
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 5
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000005995 Aluminium silicate Substances 0.000 description 3
- 235000012211 aluminium silicate Nutrition 0.000 description 3
- 235000010216 calcium carbonate Nutrition 0.000 description 3
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 3
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 2
- 239000001095 magnesium carbonate Substances 0.000 description 2
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 2
- 229960001708 magnesium carbonate Drugs 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000004408 titanium dioxide Substances 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- KPAMAAOTLJSEAR-UHFFFAOYSA-N [N].O=C=O Chemical compound [N].O=C=O KPAMAAOTLJSEAR-UHFFFAOYSA-N 0.000 description 1
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 description 1
- BTSFESCCYNUKPK-UHFFFAOYSA-L [O-2].[O-2].[Ti+4].[Ba+2].[O-]S([O-])(=O)=O Chemical compound [O-2].[O-2].[Ti+4].[Ba+2].[O-]S([O-])(=O)=O BTSFESCCYNUKPK-UHFFFAOYSA-L 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000008346 aqueous phase Substances 0.000 description 1
- 239000007900 aqueous suspension Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- ZFXVRMSLJDYJCH-UHFFFAOYSA-N calcium magnesium Chemical compound [Mg].[Ca] ZFXVRMSLJDYJCH-UHFFFAOYSA-N 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- 239000001175 calcium sulphate Substances 0.000 description 1
- 235000011132 calcium sulphate Nutrition 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- YLUIKWVQCKSMCF-UHFFFAOYSA-N calcium;magnesium;oxygen(2-) Chemical compound [O-2].[O-2].[Mg+2].[Ca+2] YLUIKWVQCKSMCF-UHFFFAOYSA-N 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 description 1
- 159000000003 magnesium salts Chemical class 0.000 description 1
- 239000000391 magnesium silicate Substances 0.000 description 1
- 229910052919 magnesium silicate Inorganic materials 0.000 description 1
- 235000019792 magnesium silicate Nutrition 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 239000004579 marble Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 235000021395 porridge Nutrition 0.000 description 1
- 229940088417 precipitated calcium carbonate Drugs 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- -1 satin white Chemical compound 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000004383 yellowing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F5/00—Compounds of magnesium
- C01F5/24—Magnesium carbonates
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/18—Carbonates
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/18—Carbonates
- C01F11/185—After-treatment, e.g. grinding, purification, conversion of crystal morphology
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/12—Surface area
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/20—Powder free flowing behaviour
Description
Oppfinnelsen vedrører en fremgangsmåte til fremstilling av The invention relates to a method for the production of
et papirfyllstoff og/eller strykepigment, idet dolomitt ved oppvarming til ca. 1000 til 1100°C omdannes i en blanding av kalsiumoksyd og magnesiumoksyd. a paper filler and/or ironing pigment, as dolomite when heated to approx. 1000 to 1100°C is converted into a mixture of calcium oxide and magnesium oxide.
Det er kjent til fibergrøten ved papirfremstilling å til-sette fyllstoffer for å forbedre hvithet, opasitet og glatthet av råpapiret. Disse egenskaper er viktige fordi også It is known to add fillers to the pulp in papermaking in order to improve the whiteness, opacity and smoothness of the raw paper. These properties are important because also
ved stryking av råpapiroverflaten med pigmenter kan under-grunnen spesielt etter satinage skinne igjennom. when ironing the raw paper surface with pigments, the substrate can shine through, especially after satinage.
Anvendelsen av karbonater i papirmasse har nettopp i de The use of carbonates in paper pulp has precisely in them
siste år fått økende betydning, da fordelen ved papirfremstilling i basiske medier langt overveier overfor frem-: stillingen i sure medier. Dette ligger ikke bare i utnytt-elsesvarigheten av anleggsdelene av en papirfabrikk (korro-sjon ved sur fremstilling) og en redusering av maleenergi-behovet, men spesielt også i en forbedring av egenskapene av de ved karbonattilseting fremstilte papir. Således nedsettes eksempelvis gulningstendensen ved karbonatanvend-else, mens trykkegenskapene og aldringsbestandigheten forbedres . has gained increasing importance in recent years, as the advantage of paper production in basic media far outweighs production in acidic media. This lies not only in the duration of use of the plant parts of a paper mill (corrosion by acid production) and a reduction in the grinding energy requirement, but especially also in an improvement in the properties of the paper produced by carbonate addition. Thus, for example, the yellowing tendency is reduced when carbonate is used, while the pressure properties and aging resistance are improved.
For de forskjelligste papirtyper kom det tidligere i betraktning følgende fyllstoffer: aluminiumsilikat, magne-siumsilikat, kalsiumsulfat, bariumsulfat, kalsiumkarbonat, titandioksyd, titandioksyd-bariumsulfat-blandinger, kalsiumsilikat, magnesiumkarbonat. Derved anvendes magnesiumkarbonat omtrent utelukkende ved sigarettpapirfrem-stilling. Det fåes ved utfelling av magnesiumsalt med alkalikarbonater i eller utenfor fiberområdet (se Ull- For the various types of paper, the following fillers were previously considered: aluminum silicate, magnesium silicate, calcium sulphate, barium sulphate, calcium carbonate, titanium dioxide, titanium dioxide-barium sulphate mixtures, calcium silicate, magnesium carbonate. Thereby, magnesium carbonate is used almost exclusively in cigarette paper production. It is obtained by precipitation of magnesium salt with alkali carbonates in or outside the fiber area (see Ull-
manns Enzyklopadie der technischen Chemie 1960, side 119). mann's Enzyklopadie der technischen Chemie 1960, page 119).
Kalsiumkarbonater anvendes som naturlige eller utfelt kalsiumkarbonat som strykepigment i papirindustrien. Som utgangsstoffer for det naturlige kalsiumkarbonat kommer det i betraktning kalkspat, marmor og kritt, som etter maling og sikting anvendes med forskjellig finhetsgrad Calcium carbonates are used as natural or precipitated calcium carbonate as an ironing pigment in the paper industry. As starting materials for the natural calcium carbonate, lime spar, marble and chalk come into consideration, which after grinding and sifting are used with different degrees of fineness
(ca. 70-95% < 2 pm). Det utfelte karbonat oppstår ved innfør-ing av karbondioksyd i kalsiumhydroksyd, idet man alt etter reaksjonsbetingelsene får i det vesentlige nålformet aragonit-krystaller av forskjellig størrelse (se Huggenberger i "Sympo-sium iiber das Streichen von Papier", Wochenblatt fiir Papier-fabrikation 1974", s. 353-362). (approx. 70-95% < 2 pm). The precipitated carbonate occurs when carbon dioxide is introduced into calcium hydroxide, depending on the reaction conditions essentially needle-shaped aragonite crystals of different sizes are obtained (see Huggenberger in "Symposium iiber das Streichen von Papier", Wochenblatt fiir Papier-fabrikation 1974 ", pp. 353-362).
Ifølge "Gmelin" 28, bind Calsium (B) fra s. 1346 er det kjent at dolomitt ved temperaturer på ca. 1000 til 1100°C under tap av CC^ går over i MgO og CaO og at blandingen av CaO og MgO i vandig fase med CO2 gir en karbonatblanding. Videre er det kjent å behandle brent dolomitisk kalk i vandig suspensjon med karbonsyre eller karbonsyreholdige gasser under trykk og igjen å spalte det hele ved oppvarming (tysk patent 26 7543). De kjente fremgangsmåter ble imidler-tid ikke anvendt til fremstilling av papirfyllstoff og/eller strykepigmenter. According to "Gmelin" 28, volume Calsium (B) from p. 1346, it is known that dolomite at temperatures of approx. 1000 to 1100°C during loss of CC^ passes into MgO and CaO and that the mixture of CaO and MgO in the aqueous phase with CO2 gives a carbonate mixture. Furthermore, it is known to treat burnt dolomitic lime in aqueous suspension with carbonic acid or carbonic acid-containing gases under pressure and again to decompose the whole by heating (German patent 26 7543). However, the known methods were not used for the production of paper filler and/or ironing pigments.
For å øke trykkvaliteten av et papir kommer det an på jevn-heten av dets overflate, glatthet og glans og opasitet, hvithet, lakkeringsevne og trykkfargeopptak. Disse egenskaper oppnås resp. forbedres når råpapiret deretter strykes med hvitpigmenter som man påfører i form av en grøt resp. en suspensjon på papiret i papirstrykeanlegget. In order to increase the print quality of a paper, it depends on the evenness of its surface, smoothness and gloss and opacity, whiteness, varnishability and printing ink absorption. These properties are achieved resp. is improved when the raw paper is then coated with white pigments that are applied in the form of a porridge or a suspension on the paper in the paper ironing plant.
Til pigmentet stilles derved følgende krav: høy renhet, liten partikkelstørrelse, høy hvithet og opasitet, høy brytningsindeks, høy spesifikk overflate, høy shape- The following requirements are therefore placed on the pigment: high purity, small particle size, high whiteness and opacity, high refractive index, high specific surface area, high shape-
faktor, god dispergerbarhet og gunstige rheologiske for-1 hold og godt trykkfargeopptak. Hittil kunne disse krav factor, good dispersibility and favorable rheological properties and good printing ink uptake. Until now, these requirements could
bare oppfylles ved kombinert anvendelse av følgende pigmentstoffer: kaolin, kalsiumkarbonater, satenghvitt, titandioksyd, blanchfixe. only fulfilled by the combined use of the following pigment substances: kaolin, calcium carbonates, satin white, titanium dioxide, blanchfixe.
i Oppfinnelsens oppgave er å tilveiebringe en fremgangsmåte til fremstilling av et papirfyllstoff og/eller strykepigment som er gjennomførbar uten oppslutningskjemikalier og spesielle reaksjonsdeltagere, og fører til et produkt i The task of the invention is to provide a method for the production of a paper filler and/or ironing pigment that can be carried out without dissolving chemicals and special reaction participants, and leads to a product
som forener i seg alle nevnte egenskaper. which combines all the aforementioned properties.
Oppfinnelsen vedrører en fremgangsmåte til fremstilling The invention relates to a method for production
av en stabil suspensjon av en kalsium-magnesium-karbonat-blanding med høyt faststoffinnhold, idet dolomit kalsineres, det blandede produkt suspenderes og vann og karbondioksyd innføres og suspensjonen inndampes og tilsettes et dispergeringsmiddel, idet fremgangsmåten er karakterisert ved at.kalsineringen foretas ved 1000 til 1100°C og suspensjonen innstilles på minst 20 deler vann til 1 del oksyd. of a stable suspension of a calcium-magnesium-carbonate mixture with a high solids content, in that dolomite is calcined, the mixed product is suspended and water and carbon dioxide are introduced and the suspension is evaporated and a dispersing agent is added, the method being characterized in that the calcination is carried out at 1000 to 1100°C and the suspension is adjusted to at least 20 parts water to 1 part oxide.
Det har vist seg at et utfelt, finkornet, overveiende småplateformet basisk kalsium-magnesium-karbonat, slik det oppnås ved fremgangsmåten ifølge oppfinnelsen, egner seg fremragende som massetilsetning og/eller som strykepigment for fremstilling av glinsende papir. De med kaolin eller satenghvitt strøket papir er meget utmerkede med hensyn til glans og trykkvalitet. Ytterligere fordeler ved anvendelse av utfelt, basisk kalsium-magnesium-karbonat ligger i den forbedrede opasitet og samtidig i den høyere hvithet av det behandlede papir. Finheten av kalsium-magnesium-karbonat utgjør 100% < 1 |am, den spesifikke overflate ligger i størrelsesorden på 20 m<2>/g. Det har en hvithetsgrad på over 95%. Shape-faktoren er en tier-potens større enn ved kaolin, hvilket er å tilbakeføre på den spesielle småplateform. It has been shown that a precipitated, fine-grained, predominantly plate-shaped basic calcium-magnesium carbonate, as obtained by the method according to the invention, is excellently suitable as a pulp additive and/or as an ironing pigment for the production of glossy paper. Those with kaolin or satin white coated paper are very excellent in terms of gloss and print quality. Further advantages of using precipitated basic calcium-magnesium carbonate lie in the improved opacity and at the same time in the higher whiteness of the treated paper. The fineness of calcium-magnesium-carbonate amounts to 100% < 1 |am, the specific surface is in the order of 20 m<2>/g. It has a degree of whiteness of over 95%. The shape factor is an order of magnitude greater than with kaolin, which is due to the special small plate shape.
For rekarboniseringen kan det anvendes de karbondioksyd-holdige avgasser fra dolomitkalsineringen, således at det ikke er nødvendig med noen spesiell karbonsyretilførsel. Det er klart at også rent C02 eller en karbondioksyd-nitrogen-blanding av annen opprinnelse kommer i betraktning for gassbehandlingen. Kalsineringen av dolomitt gjennomføres på fordelaktig måte i en dreierørsovn. For the recarbonation, the carbon dioxide-containing exhaust gases from the dolomite calcination can be used, so that no special carbonic acid supply is necessary. It is clear that pure C02 or a carbon dioxide-nitrogen mixture of other origin is also taken into account for the gas treatment. The calcination of dolomite is advantageously carried out in a rotary kiln.
Oppfinnelsen vedrører videre anvendelse av basisk overveiende småplateformet kalsium-magnesium-karbonat fremstilt i henhold til ovennevnte fremgangsmåte som fyllstoff og/eller strykepigment til fremstilling av glinsende papir i papirindustrien. The invention further relates to the use of basic predominantly small plate-shaped calcium-magnesium carbonate produced according to the above-mentioned method as a filler and/or ironing pigment for the production of glossy paper in the paper industry.
Oppfinnelsen skal forklares nærmere ved hjelp av to utfør-^ elseseksempler. The invention will be explained in more detail with the help of two examples.
Eksempel_l_ Example_l_
Dolomitt oppvarmes i en dreierørsovn til ca. 1100°C, hvorved det fåes en CaO-MgO-blanding. Denne oksydblanding leskes med vann omtrent til vektforhold 1:20 og rekarboniseres ved samtidig intens gjennomblanding med de i dreierørs-ovnen dannede rensede avgasser til et basisk kalsium-magnesium-karbonat. Den deretter ca. 8% faststoffholdige suspensjon, inndampes over en sentrifuge og konsentreres ved passering gjennom en filterpresse. Etter tilsetning av et dispergeringsmiddel fåes en stabil suspensjon. Dolomite is heated in a rotary tube furnace to approx. 1100°C, whereby a CaO-MgO mixture is obtained. This oxide mixture is diluted with water approximately to a weight ratio of 1:20 and recarbonized by simultaneous intense mixing with the purified exhaust gases formed in the rotary tube furnace to a basic calcium-magnesium carbonate. The then approx. 8% solids-containing suspension, is evaporated over a centrifuge and concentrated by passing through a filter press. After adding a dispersant, a stable suspension is obtained.
Eksempel_2 Example_2
En ved brenning av dolomitt dannet CaO-MgO-blanding leskes under tilsetning av 5% CaO. Rekarboniseringen av CaO og MgO foregår under ompumping med en sirkulasjonspumpe ved tilsetning av CO2, idet det foregår en spesielt god adsorb-sjon. Etter inndampingen av suspensjonen over en filterpresse fåes ved tilsetning av dispergeringsmidlet en stabil suspensjon. A CaO-MgO mixture formed by burning dolomite is leached with the addition of 5% CaO. The recarbonation of CaO and MgO takes place during repumping with a circulation pump by adding CO2, as particularly good adsorption takes place. After the evaporation of the suspension over a filter press, a stable suspension is obtained by adding the dispersant.
I begge eksempler fremkommer derved det basiske kalsium-magnesium-karbonat for en overveiende del i småplateformet struktur. In both examples, the basic calcium-magnesium-carbonate appears for the most part in a small plate-shaped structure.
I henhold til oppfinnelsen lar de tilstrebede produkter According to the invention, they allow the desired products
seg fremstille på en tilsynelatende omvei ved fremgangsmåten ifølge oppfinnelsen over oksydene resp. hydroksydene derimot prismessig gunstig og uten spesielt komplisert arbeide. Spesielt er det mulig i en eneste apparatur på enkel måte å fremstille et kalsium-magnesium-karbonat med definert kalsium-magnesium-forhold. produced in an apparent detour by the method according to the invention over the oxides or The hydroxides, on the other hand, are reasonably priced and without particularly complicated work. In particular, it is possible in a single apparatus in a simple way to produce a calcium-magnesium carbonate with a defined calcium-magnesium ratio.
Claims (4)
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19752502143 DE2502143A1 (en) | 1975-01-21 | 1975-01-21 | Calcium and magnesium carbonates suitable for paper mfr - made by feeding carbon dioxide into aq suspension of calcined dolomite |
| DE19752502144 DE2502144A1 (en) | 1975-01-21 | 1975-01-21 | Calcium and magnesium carbonates suitable for paper mfr - made by feeding carbon dioxide into aq suspension of calcined dolomite |
| DE19752504062 DE2504062A1 (en) | 1975-01-31 | 1975-01-31 | Calcium and magnesium carbonates suitable for paper mfr - made by feeding carbon dioxide into aq suspension of calcined dolomite |
| DE19762600485 DE2600485A1 (en) | 1976-01-08 | 1976-01-08 | Calcium and magnesium carbonates suitable for paper mfr - made by feeding carbon dioxide into aq suspension of calcined dolomite |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| NO792804L NO792804L (en) | 1976-07-22 |
| NO154315B true NO154315B (en) | 1986-05-20 |
| NO154315C NO154315C (en) | 1986-08-27 |
Family
ID=27431941
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO760148A NO141366C (en) | 1975-01-21 | 1976-01-16 | PROCEDURE FOR THE PREPARATION OF A CONSIDERABLE MAGNESIUM CARBONATE-CONTAINED, SMALL PLATE-SHARED CALCIUM-MAGNESIUM CARBONATE MIXTURE WITH BASIC CHARACTERISTICS |
| NO792804A NO154315C (en) | 1975-01-21 | 1979-08-29 | PROCEDURE FOR THE PREPARATION OF A STABLE SUSPENSION OF CALCIUM-MAGNESIUM CARBONATE MIXTURE WITH HIGH SOLID CONTENT AND USE OF THE MIXTURE IN THE PREPARATION OF GLOSSY PAPER. |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO760148A NO141366C (en) | 1975-01-21 | 1976-01-16 | PROCEDURE FOR THE PREPARATION OF A CONSIDERABLE MAGNESIUM CARBONATE-CONTAINED, SMALL PLATE-SHARED CALCIUM-MAGNESIUM CARBONATE MIXTURE WITH BASIC CHARACTERISTICS |
Country Status (10)
| Country | Link |
|---|---|
| BE (1) | BE837744A (en) |
| CH (1) | CH602488A5 (en) |
| FI (1) | FI62656C (en) |
| FR (1) | FR2298512A1 (en) |
| GB (1) | GB1533323A (en) |
| IT (1) | IT1066074B (en) |
| NL (1) | NL7600557A (en) |
| NO (2) | NO141366C (en) |
| PT (1) | PT64706B (en) |
| SE (1) | SE418607B (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0012578B1 (en) * | 1978-12-13 | 1983-06-08 | Monsanto Europe S.A./N.V. | Polymer compositions containing hydrated basic magnesium calcium carbonates as smoke-depressant additives |
| JPS6086067A (en) * | 1983-10-18 | 1985-05-15 | 奥多摩工業株式会社 | Manufacture of plate-like calcium hydroxide |
| US5263500A (en) * | 1991-04-12 | 1993-11-23 | Philip Morris Incorporated | Cigarette and wrapper with controlled puff count |
| US5161551A (en) * | 1991-04-12 | 1992-11-10 | Philip Morris Incorporated | Paper wrapper having improved ash characteristics |
| IT1275889B1 (en) * | 1995-03-10 | 1997-10-24 | L Ind Della Magnesia S P A Soc | MAGNESIA DERIVATIVES PRODUCTION PROCESS |
| ES2141677B1 (en) * | 1998-03-24 | 2000-11-16 | Magnesitas Navarras S A | PROCEDURE FOR THE MANUFACTURE OF BASIC MAGNESIUM CARBONATE FROM NATURAL MATERIALS OR BY-PRODUCTS WITH A CONTENT IN MAGNESIUM. |
| EP1440037B1 (en) * | 2001-10-31 | 2005-02-16 | Council Of Scientific And Industrial Research | Process for generation of precipitated calcium carbonate from calcium carbonate rich industrial by-product |
| BE1020577A3 (en) | 2012-03-22 | 2014-01-07 | Lhoist Rech & Dev Sa | MINERAL COMPOSITION BASED ON A MIXED SOLID PHASE OF CALCIUM CARBONATES AND MAGNESIUM, PROCESS FOR PREPARING THE SAME AND USE THEREOF |
| CN103738986B (en) * | 2013-12-20 | 2016-03-09 | 周骏宏 | A kind of dolomite calcination water-soluble separating calcium and magnesium produce the method for magnesium hydroxide and calcium carbonate |
| FR3037801B1 (en) * | 2015-06-23 | 2017-08-11 | Jd Invest | PULVERULENT SEMI-SYNTHETIC MATERIAL, OBTAINED BY MODIFICATION OF THE COMPOSITION OF A NATURAL MARINE BIOMATERIAL, ITS MANUFACTURING PROCESS, ITS APPLICATIONS |
-
1976
- 1976-01-16 NO NO760148A patent/NO141366C/en unknown
- 1976-01-16 PT PT64706A patent/PT64706B/en unknown
- 1976-01-19 FI FI760105A patent/FI62656C/en not_active IP Right Cessation
- 1976-01-19 IT IT67117/76A patent/IT1066074B/en active
- 1976-01-19 GB GB2053/76A patent/GB1533323A/en not_active Expired
- 1976-01-20 NL NL7600557A patent/NL7600557A/en not_active Application Discontinuation
- 1976-01-20 SE SE7600550A patent/SE418607B/en unknown
- 1976-01-21 CH CH74176A patent/CH602488A5/xx not_active IP Right Cessation
- 1976-01-21 FR FR7602074A patent/FR2298512A1/en active Granted
- 1976-01-21 BE BE2054767A patent/BE837744A/en not_active IP Right Cessation
-
1979
- 1979-08-29 NO NO792804A patent/NO154315C/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| FI62656C (en) | 1983-02-10 |
| PT64706B (en) | 1977-08-10 |
| NO792804L (en) | 1976-07-22 |
| BE837744A (en) | 1976-05-14 |
| NO141366C (en) | 1980-02-27 |
| PT64706A (en) | 1976-02-01 |
| FI62656B (en) | 1982-10-29 |
| NO154315C (en) | 1986-08-27 |
| FR2298512A1 (en) | 1976-08-20 |
| SE418607B (en) | 1981-06-15 |
| SE7600550L (en) | 1976-07-22 |
| FR2298512B1 (en) | 1981-03-20 |
| FI760105A (en) | 1976-07-22 |
| NO760148L (en) | 1976-07-22 |
| NL7600557A (en) | 1976-07-23 |
| NO141366B (en) | 1979-11-19 |
| IT1066074B (en) | 1985-03-04 |
| GB1533323A (en) | 1978-11-22 |
| CH602488A5 (en) | 1978-07-31 |
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