EP0302166A1 - Process for separating fillers from paper mill water circuits by flotation - Google Patents
Process for separating fillers from paper mill water circuits by flotation Download PDFInfo
- Publication number
- EP0302166A1 EP0302166A1 EP88103506A EP88103506A EP0302166A1 EP 0302166 A1 EP0302166 A1 EP 0302166A1 EP 88103506 A EP88103506 A EP 88103506A EP 88103506 A EP88103506 A EP 88103506A EP 0302166 A1 EP0302166 A1 EP 0302166A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- water
- paper
- metal ions
- trivalent metal
- soluble salts
- 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.)
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Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F1/00—Wet end of machines for making continuous webs of paper
- D21F1/66—Pulp catching, de-watering, or recovering; Re-use of pulp-water
- D21F1/70—Pulp catching, de-watering, or recovering; Re-use of pulp-water by flotation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/002—Inorganic compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/004—Organic compounds
- B03D1/012—Organic compounds containing sulfur
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/007—Modifying reagents for adjusting pH or conductivity
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/02—Collectors
Definitions
- the invention relates to a process for the flotation of fillers from paper cycle waters and the use of water-soluble salts of trivalent metal ions for the flotation of fillers from paper cycle waters.
- Paper fibers and auxiliaries for example fillers, glues, dyes, defoamers and / or dispersants, which get into the circulating water during papermaking, are removed from the circulating water by filtration, flotation or sedimentation processes. Fiber and filler particles are often separated by flotation, in which air is forced or sucked through the circulating water of the paper machine. Small air bubbles combine with the fiber and filler particles and form a foam on the water surface, which is removed with cloth scraper.
- Paper fibers and auxiliaries for example fillers, glues, dyes, defoamers and / or dispersants, which get into the circulating water during papermaking, are removed from the circulating water by filtration, flotation or sedimentation processes. Fiber and filler particles are often separated by flotation, in which air is forced or sucked through the circulating water of the paper machine. Small air bubbles combine with the fiber and filler particles and form a foam on the water surface, which is removed with cloth scraper.
- the object of the invention was therefore to develop a method with which it is possible to increase the filler discharge from paper circulation waters.
- the invention is based on the surprising finding that the ash removal, i.e. the separation of fillers from paper circulating water can be increased considerably if the paper circulating water is floated by adding water-soluble salts of trivalent metal ions.
- Another object of the invention is the use of water-soluble salts of trivalent metal ions for the de-ashing of paper cycle water.
- Fillers frequently used in the paper industry are, for example, aluminum silicates, such as kaolins or silica Alumina, calcium carbonates, such as chalk or lime, talc, calcium sulfate and / or barium sulfate.
- the pH of the process according to the invention is preferably between 6 and 8. This pH in the paper circulation waters is adjusted by adding water-soluble salts of trivalent metal ions. 0.05 to 1 g, particularly preferably 0.2 to 0.5 g, of water-soluble salts of trivalent metal ions per liter of circulating water are preferably used. Water-soluble sulfates, chlorides, acetates, hydroxides, phosphates and / or polyphosphates of trivalent metal ions, in particular chromium (III) sulfate, aluminum sulfate and / or iron sulfate are suitable as water-soluble salts of trivalent metal ions for the process according to the invention. Aluminum sulfate is particularly preferred.
- the subsequent flotation is carried out with 5 to 100 g, preferably with 20 to 40 g of anionic surfactants per m3 of circulating water as a collector.
- Particularly suitable anionic surfactants are C8 ⁇ 24 alkyl sulfates, prepared by reacting C8 ⁇ 24 alcohols, for example lauryl alcohol or tallow fatty alcohol with oleum, amidosulfonic acid, chlorosulfonic acid or sulfur trioxide, C8 ⁇ 24 alkyl ether sulfates, prepared by reacting C8 ⁇ 24 alcohols with 1 to 100 moles of ethylene oxide (EO) and subsequent sulfation with oleum, amidosulfonic acid, chlorosulfonic acid or sulfur trioxide, for example lauryl alcohol + 30 EO sulfate, C3 ⁇ 24 alkylphenol ether sulfates, prepared by reacting mono-, di- or trialkylphenol with 1 to 100 Mol ethylene oxide and subsequent sulfation with oleum, amidosulfonic acid, chlorosulfonic acid or sulfur trioxide, for example nonylphenol + 4 EO sulfate, C8 ⁇ 24-alkyl
- C3 ⁇ 8-alkylnaphthalenesulfonates prepared by reacting C3 ⁇ 8-alcohols with naphthalene in the presence concentrated sulfuric acid or oleum, secondary alkanesulfonates, produced by sulfonation or sulfoxidation of paraffin hydrocarbons and / or sulfated and / or sulfonated triglycerides, for example sulfated castor oil.
- the anionic surfactants are in the form of their water-soluble alkali and / or ammonium salts, in particular in the form of their sodium and / or ammonium salts.
- alkyl stands for straight and / or branched, saturated and / or unsaturated alkyl radicals of natural and / or synthetic origin.
- preferably 0.05 to 1 g, particularly preferably 0.2 to 0.5 g, of water-soluble salts of trivalent metal ions per liter of paper circulation water are added to the paper circulation waters at 20 to 60 ° C., so that a pH between 4.5 and 9, preferably between 6 and 8, and after the addition of 5 to 100 g, preferably 20 to 40 g of anionic surfactants per m3 of circulating water between 20 ° C. and 95 ° C., preferably between 45 and 60 ° C floats.
- at least 70% by weight of the total filler content can be discharged from paper circulation water.
- a paper cycle water from the deinking plant with a filler content of 1.2 g / l was floated at 45 ° C in Denver laboratory flotation cells after the addition of sodium C12 ⁇ 1 ⁇ -alkylbenzenesulfonate as an anionic collector and AL2 (SO4) 3 as an activator.
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- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Paper (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Flotation von Füllstoffen aus Papierkreislaufwässern sowie die Verwendung wasserlöslicher Salze dreiwertiger Metallionen zur Flotation von Füllstoffen aus Papierkreislaufwässern.The invention relates to a process for the flotation of fillers from paper cycle waters and the use of water-soluble salts of trivalent metal ions for the flotation of fillers from paper cycle waters.
Zur Papierherstellung werden große Mengen Wasser, beispielsweise zur Suspendierung der Faser- und Hilfsstoffe, zur Auflösung anderer Hilfsstoffe (Verdünnen) oder als Sperr-, Dicht-, Kühl- oder Kesselspeisewasser benötigt. Papierfabriken gehören deshalb zu den wasserintensiven Industriebetrieben. Durch Kreislaufnutzung wird jedoch der Bedarf an Frischwasser stark reduziert (Ullmanns Encyclopädie der technischen Chemie, 17, 577 ff. (1979)).Large quantities of water are required for papermaking, for example to suspend the fiber and auxiliary materials, to dissolve other auxiliary materials (diluting) or as barrier, sealing, cooling or boiler feed water. Paper mills are therefore among the water-intensive industrial companies. However, the use of fresh water is greatly reduced by using the cycle (Ullmanns Encyclopedia of Technical Chemistry, 17 , 577 ff. (1979)).
Um gleichbleibende Papierqualitäten zu gewährleisten, muß das im Kreislauf geführte Wasser weitgehend frei von Papierfasern und Hilfsstoffen sein. Papierfasern und Hilfsstoffe, beispielsweise Füllstoffe, Leime, Farbstoffe, Entschäumer und/oder Dispergiermittel, die während der Papierherstellung in das Kreislaufwasser gelangen, werden durch Filtrations-, Flotations- oder Sedimentationsverfahren aus dem Kreislaufwasser entfernt. Die Abtrennung von Faser- und Füllstoffpartikeln geschieht häufig durch Flotation, indem Luft durch das Kreislaufwasser der Papiermaschine gedrückt oder gesaugt werden. Kleine Luftbläschen verbinden sich mit den Faser- und Füllstoffpartikeln und bilden an der Wasseroberfläche einen Schaum, der mit Stoffängern entfernt wird.In order to ensure constant paper qualities, the circulated water must be largely free of paper fibers and additives. Paper fibers and auxiliaries, for example fillers, glues, dyes, defoamers and / or dispersants, which get into the circulating water during papermaking, are removed from the circulating water by filtration, flotation or sedimentation processes. Fiber and filler particles are often separated by flotation, in which air is forced or sucked through the circulating water of the paper machine. Small air bubbles combine with the fiber and filler particles and form a foam on the water surface, which is removed with cloth scraper.
Mit den bekannten Flotationsverfahren werden jedoch die Füllstoffe nur sehr unvollständig aus den Papierkreislaufwässern entfernt. Dies ist insbesondere dann von Nachteil, wenn zur Papierherstellung neben Holz-, Halbzell- und/oder Zellstoffen als Fasermaterialien auch Altpapiere eingesetzt werden, da die nur unvollständige Entfernung der aus den Altpapieren in das Wasser gelangenden Füllstoffe zu Schwierigkeiten bei der Herstellung von Papieren mit standardisierten Qualitätsmerkmalen führt.With the known flotation processes, however, the fillers are only very incompletely removed from the paper circulation waters. This is particularly disadvantageous if, in addition to wood, half-cell and / or cellulose, fiber paper is also used as fiber materials, since the incomplete removal of the fillers from the waste paper into the water leads to difficulties in the production of paper with standardized Leads to quality characteristics.
Die Aufgabe der Erfindung bestand daher in der Entwicklung eines Verfahrens, mit dem es möglich ist, den Füllstoffaustrag aus Papierkreislaufwässern zu steigern.The object of the invention was therefore to develop a method with which it is possible to increase the filler discharge from paper circulation waters.
Die Erfindung geht von der überraschenden Feststellung aus, daß die Entaschung, d.h. die Abtrennung von Füllstoffen aus Papierkreislaufwässern erheblich gesteigert werden kann, wenn durch Zugabe wasserlöslicher Salze dreiwertiger Metallionen die Papierkreislaufwässer flotiert werden.The invention is based on the surprising finding that the ash removal, i.e. the separation of fillers from paper circulating water can be increased considerably if the paper circulating water is floated by adding water-soluble salts of trivalent metal ions.
Gegenstand der Erfindung ist dementsprechend ein Verfahren zur Flotation von Füllstoffen aus Papierkreislaufwässern, das dadurch gekennzeichnet ist, daß Papierkreislaufwässer
- 1. mit wasserlöslichen Salzen dreiwertiger Metallionen versetzt werden, so daß sich pH-Werte zwischen 4,5 und 9 einstellen und
- 2. nach Zugabe von 5 bis 100 g anionischer Tenside pro m³ Kreislaufwasser als Sammler in an sich bekannter Weise flotiert werden.
- 1. water-soluble salts of trivalent metal ions are added so that pH values between 4.5 and 9 are established and
- 2. after addition of 5 to 100 g of anionic surfactants per m³ of circulating water are floated as collectors in a manner known per se.
Ein weiterer Erfindungsgegenstand ist die Verwendung wasserlöslicher Salze dreiwertiger Metallionen zur Entaschung von Papierkreislaufwässern.Another object of the invention is the use of water-soluble salts of trivalent metal ions for the de-ashing of paper cycle water.
In der Papierindustrie häufig verwendete Füllstoffe sind beispielsweise Aluminiumsilikate, wie Kaoline oder kieselsaure Tonerde, Calciumcarbonate, wie Kreide oder Kalk, Talkum, Calciumsulfat und/oder Bariumsulfat.Fillers frequently used in the paper industry are, for example, aluminum silicates, such as kaolins or silica Alumina, calcium carbonates, such as chalk or lime, talc, calcium sulfate and / or barium sulfate.
Der pH-Wert des erfindungsgemäßen Verfahren liegt vorzugsweise zwischen 6 und 8. Dieser pH-Wert in den Papierkreislaufwässern wird durch Zugabe wasserlöslicher Salze dreiwertiger Metallionen eingestellt. Dabei werden vorzugsweise 0,05 bis 1 g, besonders bevorzugt 0,2 bis 0,5 g wasserlöslicher Salze dreiwertiger Metallionen pro Liter Kreislaufwasser eingesetzt. Wasserlösliche Sulfate, Chloride, Acetate, Hydroxide, Phosphate und/oder Polyphospate dreiwertiger Metallionen, insbesondere Chrom(III)-sulfat, Aluminiumsulfat und/oder Eisensulfat eigenen sich als wasserlösliche Salze dreiwertiger Metallionen für das erfindungsgemäße Verfahren. Besonders bevorzugt wird Aluminiumsulfat.The pH of the process according to the invention is preferably between 6 and 8. This pH in the paper circulation waters is adjusted by adding water-soluble salts of trivalent metal ions. 0.05 to 1 g, particularly preferably 0.2 to 0.5 g, of water-soluble salts of trivalent metal ions per liter of circulating water are preferably used. Water-soluble sulfates, chlorides, acetates, hydroxides, phosphates and / or polyphosphates of trivalent metal ions, in particular chromium (III) sulfate, aluminum sulfate and / or iron sulfate are suitable as water-soluble salts of trivalent metal ions for the process according to the invention. Aluminum sulfate is particularly preferred.
Die anschließende Flotation wird mit 5 bis 100 g, vorzugsweise mit 20 bis 40 g anionischer Tenside pro m³ Kreislaufwasser als Sammler durchgeführt.The subsequent flotation is carried out with 5 to 100 g, preferably with 20 to 40 g of anionic surfactants per m³ of circulating water as a collector.
Als anionische Tenside eignen sich insbesondere C₈₋₂₄-Alkylsulfate, hergestellt durch Umsetzung von C₈₋₂₄-Alkoholen, beispielsweise Laurylalkohol oder Talgfettalkohol mit Oleum, Amidosulfonsäure, Chlorsulfonsäure oder Schwefeltrioxid, C₈₋₂₄-Alkylethersulfate, hergestellt durch Umsetzung von C₈₋₂₄-Alkoholen mit 1 bis 100 Mol Ethylenoxid (EO) und anschließende Sulfatierung mit Oleum, Amidosulfonsäure, Chlorsulfonsäure oder Schwefeltrioxid, beispielsweise Laurylalkohol + 30 EO-Sulfat, C₃₋₂₄-Alkylphenolethersulfate, hergestellt durch Umsetzung von Mono-, Di- oder Trialkylphenol mit 1 bis 100 Mol Ethylenoxid und anschließende Sulfatierung mit Oleum, Amidosulfonsäure, Chlorsulfonsäure oder Schwefeltrioxid, beispielsweise Nonylphenol + 4 EO-Sulfat, C₈₋₂₄-Alkyl- und/oder C₃₋₂₄-Alkylphenolethersulfate, hergestellt durch Umsetzung von C₈₋₂₄-Alkoholen und/oder Mono-, Di- oder Trialkylphenolen mit 1 bis 100 Mol Ethylenoxid und anschließende Umsetzung mit Polyphosphorsäuren oder Phosphorsäureanhydrid, beispielsweise Laurylalkohol + 10 EO-Phosphat, Sulfobernsteinsäurehalbester von C₈₋₂₄-Alkyl- oder C₃₋₂₄-Alkylphenolpolyglycoletheralkoholen, hergestellt durch Umsetzung von C₈₋₂₄-Alkyl- oder C₃₋₂₄-Alkylphenolpolyglycoletheralkoholen mit Maleinsäureanhydrid und anschließende Sulfitierung mit Natriumhydrogensulfit, beispielsweise Nonylphenol + 10 EO-Sulfosuccinat, Sulfobernsteinsäurehalbester von C₈₋₂₄-Alkanolen oder C₈₋₂₄-Alkylaminen, beispielsweise Laurylsulfosuccinat oder Talgaminsulfosuccinamat, Sulfobernsteinsäureester von C₄₋₁₈-Alkoholen, hergestellt durch Sulfitierung der entsprechenden Maleinsäurediester nach einem der in EP-PS 87 711 beschriebenen Verfahren, C₈₋₂₄-Alkylbenzolsulfonate, hergestellt durch Sulfonierung von C₈₋₂₄-Alkylbenzolen mit konzentrierter Schwefelsäure, Oleum oder Schwefeltrioxid, beispielsweise n-Dodecylbenzolsulfonat, Sulfocarbonsäurealkylester und/oder Sulfocarbonsäuren mit 8 bis 24 C-Atomen im Carbonsäureteil, wie beispielsweise in US 4 529 762 oder DE-OS 35 13 046 beschrieben, C₃₋₈-Alkylnaphthalinsulfonate, hergestellt durch Umsetzung von C₃₋₈-Alkoholen mit Naphthalin in Gegenwart konzentrierter Schwefelsäure oder Oleum, sekundäre Alkansulfonate, hergestellt durch Sulfonierung oder Sulfoxidation von Paraffinkohlenwasserstoffen und/oder sulfatierte und/oder sulfonierte Triglyceride, beispielsweise sulfatiertes Rizinusöl. Die anionischen Tenside werden in Form ihrer wasserlöslichen Alkali- und/oder Ammoniumsalze, insbesondere in Form ihrer Natrium- und/oder Ammoniumsalze. Die Bezeichnung "Alkyl" steht für gerad- und/oder verzweigtkettige, gesättigte und/oder ungesättigte Alkylreste natürlichen und/oder synthetischen Ursprungs.Particularly suitable anionic surfactants are C₈₋₂₄ alkyl sulfates, prepared by reacting C₈₋₂₄ alcohols, for example lauryl alcohol or tallow fatty alcohol with oleum, amidosulfonic acid, chlorosulfonic acid or sulfur trioxide, C₈₋₂₄ alkyl ether sulfates, prepared by reacting C₈₋₂₄ alcohols with 1 to 100 moles of ethylene oxide (EO) and subsequent sulfation with oleum, amidosulfonic acid, chlorosulfonic acid or sulfur trioxide, for example lauryl alcohol + 30 EO sulfate, C₃₋₂₄ alkylphenol ether sulfates, prepared by reacting mono-, di- or trialkylphenol with 1 to 100 Mol ethylene oxide and subsequent sulfation with oleum, amidosulfonic acid, chlorosulfonic acid or sulfur trioxide, for example nonylphenol + 4 EO sulfate, C₈₋₂₄-alkyl and / or C₃₋₂₄-alkylphenol ether sulfates, prepared by reacting C₈₋₂₄ alcohols and / or mono -, Di- or Trialkylphenols with 1 to 100 mol of ethylene oxide and subsequent reaction with polyphosphoric acids or phosphoric anhydride, for example lauryl alcohol + 10 EO phosphate, sulfosuccinic acid semiesters of C₈₋₂₄-alkyl or C₃₋₂₄-alkylphenol polyglycol ether alcohols, prepared by reacting C₈₋₂₄-alkyl or C₃ ₋₂₄-alkylphenol polyglycol ether alcohols with maleic anhydride and subsequent sulfitation with sodium hydrogen sulfite, for example nonylphenol + 10 EO sulfosuccinate, sulfosuccinic acid semiesters of C₈₋₂₄ alkanols or C₈₋₂₄ alkylamines, for example laurylsulfosuccinate or tallowamine sulfosuccinate, sulfamate sulfonuccinate, from talgamine sulfosuccinate, from sulfamate sulfosuccinate, from sulfamate sulfonate, from sulfamate sulfonuccinate Tal, the corresponding maleic diester according to one of the processes described in EP-PS 87 711, C₈₋₂₄-alkylbenzenesulfonates, prepared by sulfonation of C₈₋₂₄-alkylbenzenes with concentrated sulfuric acid, oleum or sulfur trioxide, for example n-dodecylbenzenesulfonate, sulfocarboxylic acid alkyl esters and / or sulfocarboxylic acids with 8 to 24 carbon atoms in the carboxylic acid part, as described, for example, in US Pat. No. 4,529,762 or DE-OS 35 13 046, C₃₋₈-alkylnaphthalenesulfonates, prepared by reacting C₃₋₈-alcohols with naphthalene in the presence concentrated sulfuric acid or oleum, secondary alkanesulfonates, produced by sulfonation or sulfoxidation of paraffin hydrocarbons and / or sulfated and / or sulfonated triglycerides, for example sulfated castor oil. The anionic surfactants are in the form of their water-soluble alkali and / or ammonium salts, in particular in the form of their sodium and / or ammonium salts. The term "alkyl" stands for straight and / or branched, saturated and / or unsaturated alkyl radicals of natural and / or synthetic origin.
Erfindungsgemäß werden die Papierkreislaufwässer mit vorzugsweise 0,05 bis 1 g, besonders bevorzugt mit 0,2 bis 0,5 g wasserlöslicher Salze dreiwertiger Metallionen pro Liter Papierkreislaufwasser bei 20 bis 60 °C versetzt, so daß sich ein pH-Wert zwischen 4,5 und 9, vorzugsweise zwischen 6 und 8 einstellt und nach Zugabe von 5 bis 100 g, vorzugsweise von 20 bis 40 g anionischer Tenside pro m³ Kreislaufwasser zwischen 20 °C und 95 °C, vorzugsweise zwischen 45 und 60 °C flotiert. Mit dem erfindungsgemäßen Verfahren können aus Papierkreislaufwässern mindestens 70 Gew.-% des gesamten Füllstoffgehaltes ausgetragen werden.According to the invention, preferably 0.05 to 1 g, particularly preferably 0.2 to 0.5 g, of water-soluble salts of trivalent metal ions per liter of paper circulation water are added to the paper circulation waters at 20 to 60 ° C., so that a pH between 4.5 and 9, preferably between 6 and 8, and after the addition of 5 to 100 g, preferably 20 to 40 g of anionic surfactants per m³ of circulating water between 20 ° C. and 95 ° C., preferably between 45 and 60 ° C floats. With the method according to the invention, at least 70% by weight of the total filler content can be discharged from paper circulation water.
Ein Papierkreislaufwasser aus der Deinkinganlage mit einem Füllstoffgehalt von 1,2 g/l wurde bei 45 °C in Denver-Laborflotationszellen nach Zugabe von Natrium-C₁₂₋₁₈-alkylbenzolsulfonat als anionischem Sammler und AL₂(SO₄)₃ als Aktivator flotiert.A paper cycle water from the deinking plant with a filler content of 1.2 g / l was floated at 45 ° C in Denver laboratory flotation cells after the addition of sodium C₁₂₋₁₋-alkylbenzenesulfonate as an anionic collector and AL₂ (SO₄) ₃ as an activator.
Die Ergebnisse sind der nachfolgenden Tabelle zu entnehmen.
Claims (7)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19873723500 DE3723500A1 (en) | 1987-07-16 | 1987-07-16 | METHOD FOR FLOTATION OF FILLERS FROM PAPER CIRCUIT WATER |
DE3723500 | 1987-07-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0302166A1 true EP0302166A1 (en) | 1989-02-08 |
Family
ID=6331678
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP88103506A Withdrawn EP0302166A1 (en) | 1987-07-16 | 1988-03-07 | Process for separating fillers from paper mill water circuits by flotation |
Country Status (11)
Country | Link |
---|---|
EP (1) | EP0302166A1 (en) |
JP (1) | JPS6433292A (en) |
AU (1) | AU601823B2 (en) |
CS (1) | CS272785B2 (en) |
DE (1) | DE3723500A1 (en) |
DK (1) | DK136388A (en) |
FI (1) | FI881183A (en) |
HU (1) | HUT53031A (en) |
NO (1) | NO880697L (en) |
PL (1) | PL271189A1 (en) |
YU (1) | YU45490B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2794035A1 (en) * | 1999-05-28 | 2000-12-01 | Rhodia Chimie Sa | NEW AMPHIPHILIC CATIONIC COMPLEXES AND THEIR APPLICATION IN AQUEOUS MEDIA |
FR2794118A1 (en) * | 1999-05-28 | 2000-12-01 | Rhodia Chimie Sa | APPLICATION OF CATIONIC AMPHIPHILIC COMPLEXES PARTICULAR IN THE CONDITIONING OF SLUDGE |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1053946A (en) * | ||||
GB1177003A (en) * | 1966-03-09 | 1970-01-07 | Nalco Chemical Co | Method of improving Operational Efficiency of White-Water-Recovery Systems |
DE1636335A1 (en) * | 1964-11-10 | 1971-05-27 | Zschimmer & Schwarz | Process for cleaning water containing paper stock by flotation or sedimentation |
-
1987
- 1987-07-16 DE DE19873723500 patent/DE3723500A1/en not_active Withdrawn
-
1988
- 1988-02-17 NO NO88880697A patent/NO880697L/en unknown
- 1988-03-07 EP EP88103506A patent/EP0302166A1/en not_active Withdrawn
- 1988-03-09 YU YU471/88A patent/YU45490B/en unknown
- 1988-03-09 HU HU881141A patent/HUT53031A/en unknown
- 1988-03-11 DK DK136388A patent/DK136388A/en not_active Application Discontinuation
- 1988-03-14 AU AU13069/88A patent/AU601823B2/en not_active Ceased
- 1988-03-14 PL PL27118988A patent/PL271189A1/en unknown
- 1988-03-14 FI FI881183A patent/FI881183A/en not_active Application Discontinuation
- 1988-03-14 CS CS166288A patent/CS272785B2/en unknown
- 1988-03-15 JP JP63063054A patent/JPS6433292A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1053946A (en) * | ||||
DE1636335A1 (en) * | 1964-11-10 | 1971-05-27 | Zschimmer & Schwarz | Process for cleaning water containing paper stock by flotation or sedimentation |
GB1177003A (en) * | 1966-03-09 | 1970-01-07 | Nalco Chemical Co | Method of improving Operational Efficiency of White-Water-Recovery Systems |
Non-Patent Citations (3)
Title |
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ABSTRACT BULLETIN OF THE INSTITUTE OF PAPER CHEMISTRY, Band 56, Nr. 6, Dezember 1985, Seite 740, Zusammenfassung Nr. 6655, Appleton, Wisconsin, US; V. VULCHEV et al.: "Intensifying fiber precipitation in effluents in the manufacture of multi-ply board" * |
CHEMICAL ABSTRACTS, Band 91, Nr. 6, 6. August 1979, Zusammenfassung Nr. 41117r, Seite 89, Columbus, Ohio, US; & JP-A-79 35 889 (NIKKI K.K.) 16-03-1979 * |
J.P. CASEY: "Pulp and Paper. Chemistry and Chemical Technology", Band 11, Ausgabe 3, 1980, Seiten 1177-1214, John Wiley & Sons, New York, US; A.M. SPRINGER et al.: "Environmental control","Water Pollution" * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
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FR2794035A1 (en) * | 1999-05-28 | 2000-12-01 | Rhodia Chimie Sa | NEW AMPHIPHILIC CATIONIC COMPLEXES AND THEIR APPLICATION IN AQUEOUS MEDIA |
FR2794118A1 (en) * | 1999-05-28 | 2000-12-01 | Rhodia Chimie Sa | APPLICATION OF CATIONIC AMPHIPHILIC COMPLEXES PARTICULAR IN THE CONDITIONING OF SLUDGE |
WO2000073216A1 (en) * | 1999-05-28 | 2000-12-07 | Rhodia Chimie | Compositions of an anionic surfactant and a mineral cation used in aqueous medium |
WO2000073219A1 (en) * | 1999-05-28 | 2000-12-07 | Rhodia Chimie | Sludge conditioning with compositions comprising an anionic surfactant and a mineral cation |
Also Published As
Publication number | Publication date |
---|---|
JPS6433292A (en) | 1989-02-03 |
FI881183A0 (en) | 1988-03-14 |
NO880697L (en) | 1989-01-17 |
AU1306988A (en) | 1989-01-19 |
YU47188A (en) | 1989-10-31 |
DK136388A (en) | 1989-01-17 |
HUT53031A (en) | 1990-09-28 |
DE3723500A1 (en) | 1989-01-26 |
FI881183A (en) | 1989-01-17 |
DK136388D0 (en) | 1988-03-11 |
NO880697D0 (en) | 1988-02-17 |
CS166288A2 (en) | 1990-06-13 |
PL271189A1 (en) | 1989-03-06 |
YU45490B (en) | 1992-05-28 |
CS272785B2 (en) | 1991-02-12 |
AU601823B2 (en) | 1990-09-20 |
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