DE3144387A1 - Method of processing wastepaper suspensions by flotation - Google Patents
Method of processing wastepaper suspensions by flotationInfo
- Publication number
- DE3144387A1 DE3144387A1 DE19813144387 DE3144387A DE3144387A1 DE 3144387 A1 DE3144387 A1 DE 3144387A1 DE 19813144387 DE19813144387 DE 19813144387 DE 3144387 A DE3144387 A DE 3144387A DE 3144387 A1 DE3144387 A1 DE 3144387A1
- Authority
- DE
- Germany
- Prior art keywords
- soap
- flotation
- calcium
- lime
- added
- 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.)
- Withdrawn
Links
- 238000005188 flotation Methods 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000000725 suspension Substances 0.000 title claims abstract description 9
- 239000010893 paper waste Substances 0.000 title claims description 8
- 239000000344 soap Substances 0.000 claims abstract description 35
- 235000014113 dietary fatty acids Nutrition 0.000 claims abstract description 12
- 239000000194 fatty acid Substances 0.000 claims abstract description 12
- 229930195729 fatty acid Natural products 0.000 claims abstract description 12
- 150000004665 fatty acids Chemical class 0.000 claims abstract description 12
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229910001424 calcium ion Inorganic materials 0.000 claims abstract description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 21
- 239000011575 calcium Substances 0.000 claims description 11
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 9
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 8
- 229910052791 calcium Inorganic materials 0.000 claims description 8
- 239000000920 calcium hydroxide Substances 0.000 claims description 5
- 235000011116 calcium hydroxide Nutrition 0.000 claims description 5
- 239000000292 calcium oxide Substances 0.000 claims description 5
- 235000012255 calcium oxide Nutrition 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000008149 soap solution Substances 0.000 claims description 4
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 3
- 239000011734 sodium Substances 0.000 claims description 3
- 229910052708 sodium Inorganic materials 0.000 claims description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 abstract description 12
- 235000011941 Tilia x europaea Nutrition 0.000 abstract description 12
- 239000004571 lime Substances 0.000 abstract description 12
- 239000003795 chemical substances by application Substances 0.000 abstract 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000009950 felting Methods 0.000 description 1
- 239000008396 flotation agent Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
- D21C5/02—Working-up waste paper
- D21C5/025—De-inking
- D21C5/027—Chemicals therefor
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
- D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
- D21B1/30—Defibrating by other means
- D21B1/32—Defibrating by other means of waste paper
- D21B1/325—Defibrating by other means of waste paper de-inking devices
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/64—Paper recycling
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Toxicology (AREA)
- Detergent Compositions (AREA)
- Paper (AREA)
Abstract
Description
Kennwort: "Kalkseife"Password: "Kalkseife"
Verfahren zur Flotationsaufbereitung von Altpapiersuspensionen Bei der Flotation von Altpapier zum Zwecke der Druckfarbenentfernung wird das Flotationsmittel Fettsäure oder Kernseife verwendet. Im Falle des Einsatzes von Fettsäure wird diese mit Natriumhydroxyd (NaOH) zu Seife (Kernseife) umgewandelt. Die Kernseife reagiert insbesondere mit dem Kalziumion der Wasserhärtebildner zu Kalkseife. Diese trägt maßgeblich zur Bildung des Flotationsschaumes bei. Dabei ist man bisher so vorgegangen, daß die Kalkseife in sehr fein dispergiertem Zustand, d.h. beinah molekular entstanden ist. Process for the flotation processing of waste paper suspensions At the flotation of waste paper for the purpose of ink removal becomes the flotation agent Fatty acid or curd soap used. In the case of the use of fatty acid this will be converted to soap (curd soap) with sodium hydroxide (NaOH). The curd soap reacts especially with the calcium ion of the water hardness builders to lime soap. This carries significantly contributes to the formation of the flotation foam. So far, the procedure has been that the lime soap was created in a very finely dispersed state, i.e. almost molecularly is.
Der Nachteil dieses bekannten Systems besteht in der schlecht kontrollierbaren Reaktion. Es besteht die Gefahr, daß die Fettsäure nicht vollständig verseift und die Kernseife nicht vollständig in Kalkseife umgewandelt wird. Verlassen aber Fettsäure oder Kernseife oder beides gemeinsam das Flotationssystem mit dem gereinigten Faserstoff, wird durch die übliche Einstellung des pH-Wertes von 5 bis 6 die Kernseife in Fettsäure umgewandelt.The disadvantage of this known system is that it is difficult to control Reaction. There is a risk that the fatty acid is not completely saponified and the curd soap is not completely converted into lime soap. But leave fatty acid or curd soap or both together the flotation system with the cleaned pulp, The curd soap turns into fatty acid by the usual adjustment of the pH value of 5 to 6 converted.
Diese verursacht auf der Papiermaschine große Schwierigkeiten bei der Blattbildung infolge Ablagerungen auf den Sieben, Filzen, Preßwalzen, Trockenzylindern, und im Falle der Tissue-Herstellung entstehen Probleme am Kreppzylinder.This causes great difficulties on the paper machine sheet formation as a result of deposits on the sieves, Felting, press rolls, Drying cylinders, and in the case of tissue production, problems arise with the creping cylinder.
Die Aufgabe der Erfindung ist es nun, ein Verfahren zur Flotationsaufbereitung für Altpapier anzugeben, das einen gereinigten Faserstoff liefert, der frei ist von Fettsäure oder Kernseife.The object of the invention is now to provide a method for flotation processing for waste paper that provides a purified pulp that is free of fatty acid or curd soap.
Diese Aufgabe wird erfindungsgemäß durch die Merkmale des Patentanspruchs 1 gelöst.According to the invention, this object is achieved by the features of the patent claim 1 solved.
Man geht dabei am besten folgendermaßen vor: Die heiße Seifenlösung mit einer Temperatur-von 50 bis 90°C und einer Konzentration von 5 bis 15 ffi wird in einem Reaktionsgefäß mit Kalkmilch (Ca(OH)2)~versetzt. Dabei ëntsteht nach der folgenden Reaktionsgleichung Kalkseife und Natriumhydroxyd, wobei R für die Kettenreste der verschiedensten Fettsäuren stehen mag.It is best to proceed as follows: The hot soap solution with a temperature of 50 to 90 ° C and a concentration of 5 to 15 ffi milk of lime (Ca (OH) 2) ~ is added in a reaction vessel. It arises after the following reaction equation lime soap and sodium hydroxide, where R stands for the chain residues of the most varied of fatty acids.
2 R - COONa + Ca(OH)2 (R-COO)2Ca + 2 NaOH Es ist günstig, das Reaktionsgefäß so auszulegen, daß eine längere Verweilzeit von mindestens etwa 2 bis 3 Minuten, höchstens jedoch aber von 15 Minuten, bei der gewählten Temperatur gewährleistet ist. Dadurch wird alle Kernseife in Kalkseife umgewandelt.2 R - COONa + Ca (OH) 2 (R-COO) 2Ca + 2 NaOH It is advantageous to design the reaction vessel in such a way that a longer residence time of at least about 2 to 3 minutes, but not more than 15 minutes, is ensured at the selected temperature. This will convert all curd soap into lime soap.
Auch eine kontinuierliche Verfahrensweise ist möglich.A continuous procedure is also possible.
Der Vorteil dieses Verfahrens besteht neben der Vermeidung der genannten Probleme in der freien Dosiermöglichkeit. Man ist durch die bereits abgelaufene Reaktion nicht gezwungen, die Seifenlösung oder die Fett säure im Stofflöser zuzugeben, sondern man kann, insbesondere zur Vermeidung von Druckfarbenablagerungen (Schmieren), direkt in die Mischzelle der Flotationsstraße die Kalkseife dosieren.The advantage of this method consists in avoiding the aforementioned Problems in the free dosing option. One is through the already expired Reaction not forced to add the soap solution or the fatty acid in the pulper, but you can, especially to avoid printing ink deposits (smearing), Dose the lime soap directly into the mixing cell of the flotation line.
Zu beachten bei diesem Verfahren ist, daß die erzeugte Kalkseife unmittelbar nach ihrer Herstellung oder in einem diesem entsprechenden Zustand unverändert der Altpapiersuspension zugegeben wird. Nur dann bleibt die Sammiereigenschaft der Kalkseife gewahrt.It should be noted in this process that the lime soap produced is immediate unchanged after their production or in a state corresponding to this Waste paper suspension is added. Only then does the lime soap retain its collecting property preserved.
Nachfolgend ist an einem in der Figur der Zeichnung dargestellten Ausführungsbeispiel die Erfindung verdeutlicht.Below is one shown in the figure of the drawing Embodiment illustrates the invention.
Aus einem Vorratsbehälter 1 mit Fettsäure oder einem Gemisch von Fettsäuren wird dieses in einen ersten Mischbehälter 2 gepumpt. In diesem Mischbehälter 2, der mit Dampf beheizt ist, wird noch Natriumhydroxyd zugegeben, so daß sich dort Natriumseife bildet. Diese wird mit einer Temperatur zwischen 30 und 90 0C in einen weiteren Mischbehälter 3 eingeleitet, in welchem eine Vermischung mit Kal-ziumhydroxyd vorgenommen wird, so daß sich hier Kalkseife bildet. Zu diesem Zweck wird beispielsweise gebrannter Kalk mit Wasser von einer Temperatur zwischen 30 und 90°C in einen Mischbehälter 5 zu Kalkmilch verarbeitet, die dann in den Mischbehälter 3 eingeleitet wird. Nach dem Mischbehälter 3 gelangt die so hergestellte Kalkseife im wesentlichen in einen Mischbehälter 6, der vor die Flotationsanlage 7 geschaltet ist. In diesem Mischbehälter 6 wird ferner die Papierfasersuspension durch Leitung 10 eingegeben. Man benötigt etwa O,11 g gebrannten Kalk für 1 g Natriumseife. Man wird den gebrannten Kalk in einem geringen überstöchiometrischen Verhältnis zugeben, um sicherzugehen, daß sich auch die gesamte Kernseife in Kalziumseife umwandelt. Hinter der Flotationsanlage gelangt dann die gereinigte Papierfasersuspension über Leitung 9 zur Papiermaschine.From a storage container 1 with fatty acid or a mixture of fatty acids this is pumped into a first mixing container 2. In this mixing container 2, which is heated with steam, sodium hydroxide is added so that there Forms sodium soap. This is with a temperature between 30 and 90 0C in a another mixing tank 3 initiated, in which a mixing with calcium hydroxide is made so that lime soap is formed here. For this purpose, for example Quick lime with water at a temperature between 30 and 90 ° C in a mixing container 5 processed into milk of lime, which is then introduced into the mixing container 3. To the mixing container 3, the lime soap produced in this way passes essentially into a Mixing tank 6, which is connected upstream of the flotation system 7. In this mixing container 6, the paper fiber suspension is also entered through line 10. You need about 0.11 g quicklime for 1 g sodium soap. One gets the quick lime in add a low over-stoichiometric ratio to ensure that also converts all of the curd soap into calcium soap. Behind the flotation plant The cleaned paper fiber suspension then reaches the paper machine via line 9.
Dabei sind die üblichen Feinreinigungsstufen zwischengeschaltet.The usual fine cleaning stages are interposed.
Die verschiedenen Lösungen werden in den Mischbehälter jeweils am besten mit Dosierpumpen zugegeben.The different solutions are added to the mixing container on best added with metering pumps.
Die Herstellung der Kalkseife sollte am besten in einem Behälter erfolgen, in dessen ersten Teil eine einwandfreie Durchmischung der Kalkmilch mit der Kernseife erreicht wird. Es ist auch möglich, die Herstellung der Kalziumseife in einer Rohrstrecke zu bewirken, die auch als Wärmetauscher ausgebildet sein kann, um entweder die Temperatur der Lösung zu erhöhen oder zumindest zu halten. Bei genauer Dosierung der zuzusetzenden Stoffe, was ja durch die Dosierpumpen gewährleistet ist, ist es möglich, die Kalziumseife kontinuierlich herzustellen und kontinuierlich in den Mischbehälter 6 einzugeben.The lime soap is best made in a container, in the first part a perfect mixing of the milk of lime with the curd soap is achieved. It is also possible to manufacture the calcium soap in a pipe run to effect, which can also be designed as a heat exchanger to either increase or at least maintain the temperature of the solution. With exact dosage of the substances to be added, which is guaranteed by the dosing pumps possible to make the calcium soap continuously and continuously in the Enter mixing container 6.
LeerseiteBlank page
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19813144387 DE3144387A1 (en) | 1981-11-07 | 1981-11-07 | Method of processing wastepaper suspensions by flotation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19813144387 DE3144387A1 (en) | 1981-11-07 | 1981-11-07 | Method of processing wastepaper suspensions by flotation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE3144387A1 true DE3144387A1 (en) | 1983-05-19 |
Family
ID=6145939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19813144387 Withdrawn DE3144387A1 (en) | 1981-11-07 | 1981-11-07 | Method of processing wastepaper suspensions by flotation |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE3144387A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3702978C1 (en) * | 1987-02-02 | 1988-06-30 | Gruenau Gmbh Chem Fab | Process for de-inking printed waste paper |
| EP0398846A3 (en) * | 1989-01-27 | 1991-09-04 | COMER S.p.A. | Deinking apparatus in the constant density section of paper manufacturing plants |
| DE4426159A1 (en) * | 1994-07-22 | 1994-12-08 | Voith Gmbh J M | Flotation device |
-
1981
- 1981-11-07 DE DE19813144387 patent/DE3144387A1/en not_active Withdrawn
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3702978C1 (en) * | 1987-02-02 | 1988-06-30 | Gruenau Gmbh Chem Fab | Process for de-inking printed waste paper |
| EP0277570A3 (en) * | 1987-02-02 | 1989-01-25 | Chemische Fabrik Grunau Gmbh | Process for deinking printed waste paper |
| US4959123A (en) * | 1987-02-02 | 1990-09-25 | Chemische Fabrik Gruenau Gmbh | Process for deinking printed waste paper |
| EP0398846A3 (en) * | 1989-01-27 | 1991-09-04 | COMER S.p.A. | Deinking apparatus in the constant density section of paper manufacturing plants |
| DE4426159A1 (en) * | 1994-07-22 | 1994-12-08 | Voith Gmbh J M | Flotation device |
| EP0693318A1 (en) | 1994-07-22 | 1996-01-24 | Voith Sulzer Stoffaufbereitung GmbH | Flotation device |
| US5770050A (en) * | 1994-07-22 | 1998-06-23 | Voith Sulzer Stoffaufbereitung Gmbh | Flotation apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8139 | Disposal/non-payment of the annual fee |