DE742617C - Process for preventing resin precipitations in paper manufacture - Google Patents
Process for preventing resin precipitations in paper manufactureInfo
- Publication number
- DE742617C DE742617C DEC56402D DEC0056402D DE742617C DE 742617 C DE742617 C DE 742617C DE C56402 D DEC56402 D DE C56402D DE C0056402 D DEC0056402 D DE C0056402D DE 742617 C DE742617 C DE 742617C
- Authority
- DE
- Germany
- Prior art keywords
- pulp
- resin
- precipitations
- salts
- processed
- 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.)
- Expired
Links
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
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/08—Removal of fats, resins, pitch or waxes; Chemical or physical purification, i.e. refining, of crude cellulose by removing non-cellulosic contaminants, optionally combined with bleaching
- D21C9/086—Removal of fats, resins, pitch or waxes; Chemical or physical purification, i.e. refining, of crude cellulose by removing non-cellulosic contaminants, optionally combined with bleaching with organic compounds or compositions comprising organic compounds
-
- 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
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/08—Removal of fats, resins, pitch or waxes; Chemical or physical purification, i.e. refining, of crude cellulose by removing non-cellulosic contaminants, optionally combined with bleaching
- D21C9/083—Removal of fats, resins, pitch or waxes; Chemical or physical purification, i.e. refining, of crude cellulose by removing non-cellulosic contaminants, optionally combined with bleaching with inorganic compounds
-
- 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
- D21H17/03—Non-macromolecular organic compounds
- D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
- D21H17/14—Carboxylic acids; Derivatives thereof
- D21H17/15—Polycarboxylic acids, e.g. maleic acid
-
- 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
- D21H17/66—Salts, e.g. alums
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Paper (AREA)
Description
Verfahren zurVerhütung von Harzausscheidungen bei der Papierherstellung Das vorliegende Verfahren bezweckt die Verhütung von Harzausscheidungen aus dem zur Papierherstellung bestimmten Zellstoff.Process for preventing resin deposits in paper making The present method aims to prevent resin deposits from forming pulp for papermaking.
Der zur Papierherstellung dienende Zellstoff enthält in der Regel mehr oder weniger große Mengen von Harz. Besonders der nach dem Sulfitverfähren bzw. aus frischem Nadelholz gewonnene Zellstoff weist mitunter Harzmengen auf, die über i °/b gehen und die sich in dem weiteren Verarbeitungsprozeß, insbesondere bei der Herstellung feiner Papiersorten, sehr unangenehm bemerkbar machen, indem sich das Harz auf Kollergang, Wurster, Holländer .und verschiedenen Teilen der Papiermaschine, wie Saugkasten, Siebtuch, Zylinder u. dgl., als klebrige Substanz absetzt und dadurch zu Unterbrechungen und Fehlfabrikationen führt.The pulp used for paper production usually contains more or less large amounts of resin. Especially the one after the sulphite process or pulp obtained from fresh coniferous wood sometimes contains amounts of resin that go over i ° / b and which is in the further processing, in particular in the production of fine types of paper, very uncomfortably noticeable by the resin on pan mill, Wurster, Holländer. and various parts of the paper machine, such as suction box, sieve cloth, cylinder and the like, settles as a sticky substance and thereby leads to interruptions and incorrect manufacturing.
Zur Beseitigung dieser durch den Harzgehalt bedingten Schwierigkeiten hat man bereits vorgeschlagen, den fertiggekochten Zellstoff nach Ablassen der Lauge und nach Waschen mit einer Aufschlämmung von Talkum oder Asbestmehl, gegebenenfalls unter Zusatz von Petroleum, im Kocher unter schwachem Druck zu erhitzen und nach Entleeren zu quirlen und auszuschwemmen. Diese Druckbehandlung, für die außerdem zur Erreichung des gesteckten Zieles verhältnismäßig große Mengen von Talkum zugesetzt werden müssen,- stellt jedoch einen besonderen Arbeitsgang dar, der die Harzentfernung kostspielig und zeitraubend macht. Zwar sollen die Nachteile dieses Verfahrens nach einem anderen Vorschlag sich dadurch vermeiden hassen, daß man das Adsorptionsmittel, wie Talkum, Kaolin, Asbestpulver, Schwerspat u. dgl., erst dann zusetzt, wenn die Cellulose den Kocher verlassen hat, abgelaugt und ausgewaschen ist, doch läßt sich auch dieses Verfahren mit Rücksicht auf die verwendeten Fällmittel nicht generell, insbesondere für feinere Papiersorten, gebrauchen, ganz abgesehen davon, daß die nach dieser Methode erzielte Wirkung in den meisten Fällen keineswegs voll befriedigen kann. Nach einer anderen zweistufigen- Arbeitsweise wird Sulfitzellstoff mit alkalisch reagierenden Mitteln, wie Natriumhydroxyd, Soda, Natriumsi:icat, Trinatriumphosphat u. dgl., in einem besonderen Arbeitsgang erhitzt, wodurch das Harz durch Verseifung wasserlöslich gemacht wird und anschließend durch Fällung mittels geeigneter Fällmittel, wie Alaun, in eine unschädliche Form übergeführt. Auch dieses Verfahren ist umständlich und daher zu kostspielig und weist noch den. Nachteil auf, daß durch die zugesetzten Alkalien der Zellstoff in unerwünschter Weise zur Ouellung gebracht wird.To eliminate these resin-related difficulties it has already been proposed to use the ready-cooked pulp after draining the lye and after washing with a slurry of talc or asbestos flour, if necessary with the addition of petroleum, to be heated in the cooker under low pressure and after Emptying to whisk and flush out. This pressure treatment for which as well relatively large amounts of talc were added to achieve the set goal must be, - but represents a special operation, the resin removal costly and time consuming. Although the disadvantages of this method are intended to hate another suggestion by avoiding the adsorbent, such as talc, kaolin, asbestos powder, barite and the like, only added when the Cellulose has left the stove, is sucked off and washed out, but can be This process is also not generally used with regard to the precipitating agents used, especially for finer types of paper, quite apart from the fact that the In most cases, the effect achieved by this method is by no means fully satisfactory can. Another two-stage process is used to produce sulphite pulp with alkaline agents such as sodium hydroxide, soda, sodium si: icate, trisodium phosphate and the like., heated in a special operation, whereby the resin by saponification is made water-soluble and then by precipitation using suitable precipitants, like alum, transformed into a harmless form. This procedure is also cumbersome and therefore too expensive and still has the. Disadvantage on that by the added Alkalis the pulp is caused to swell in an undesirable manner.
Es wurde nun gefunden, daß man die Ausscheidung von Harz und harzähnlichen Stoffen, wie Heinicellulosen, Holzgummen u. dgl., verhüten kann, wenn man den Zellstoff mit wäßrigen Lösungen von Salzen solcherAminosäuren versetzt, die auf jedes basische Stickstoffatom mehr als einen organischen Rest mit einer Carbo--,.y1,ruppe besitzen. Diese Verbindungen sind an sich bekannt und bereits dafür empfohlen worden, die Härtebildner des Wassers durch Komplexsalzbildung zu binden und sie gegen Fällungsreagenzien, wie fettsaures Alkali, unempfindlich zu machen. Aus dieser Eigenschaft konnte jedoch nicht der Schluß gezogen werden, daß sie sich auch ohne weiteres für die dem vorliegenden Verfahren zugrunde liegende Aufgabe eignen würde, nämlich die Eigenschaften des im Zellstoff enthaltenen Harzes in einer Weise zu beeinflussen, daß dieses sich nicht als schmierige Masse an Maschinenteilen und Apparaten .abscheidet.It has now been found that the excretion of resin and resin-like Substances such as celluloses, wooden gums and the like can be prevented if the pulp mixed with aqueous solutions of salts of such amino acids, each of which is basic Nitrogen atom have more than one organic radical with a carbo, y1, group. These compounds are known per se and have already been recommended for the To bind hardness components of the water through complex salt formation and to protect them against precipitation reagents, like fatty acid alkali, to be made insensitive. From this property, however, could The conclusion cannot be drawn that they are also readily in favor of the present Process underlying task would be suitable, namely the properties of the to influence the resin contained in the pulp in such a way that this itself does not separate as a greasy mass on machine parts and devices.
Zur Durchführung des Verfahrens gibt man in einem beliebigen Zeitpunkt der Verarbeitung des Zellstoffs zu Papier, jedoch vor dem Stadium, wo sich Harzausscheidungen einstellen bzw. einstellen könnten, insbesondere im Kollergang und Holländer, eine wäßrige Lösung der erfindungsgemäßen Aminosäuren zu, die bei neutraler und schwach alkalischer Reaktion nicht über i °/o des zur Verarbeitung gelangenden Zellstoffs, bei saurer Einstellung nicht über 2 bis 3 °% hinausgeht. Im allgemeinen genügen jedoch bereits Mengen von o,1 bis o,5 °%, gerechnet auf den Papierstoff. Um Schädigungen und Duellungen des Zellstoffs zu vermeiden, empfiehlt es sich, die Salze auf einen pH-Wert zwischen 5 und 8, vorzugsweise zwischen 6 und 7, einzustellen. Ausführungsbeispiel Zu ioo kg Zellstoff mit einem Harzgehalt von etwa 1,2 °/o gibt man etwa die doppelte Menge Wasser und setzt darauf 0,4 kg des Natriumsalzes der Äthylendiaminotetraessigsäure zu. Nach etwa istündiger Behandlung läßt man die Masse ab und verarbeitet sie in der üblichen Weise in Holländer, Mischholländer, Mischbütte und auf der Papiermaschine weiter.To carry out the process one gives at any point in time the processing of the pulp into paper, but before the stage where resin precipitates adjust or adjust, especially in the pan mill and Dutchman, a aqueous solution of the amino acids according to the invention, which are neutral and weak alkaline reaction not exceeding i% of the pulp to be processed, does not exceed 2 to 3% with the acidic setting. Generally enough however, amounts of 0.1 to 0.5%, calculated on the paper stock. About damage and to avoid dueling the pulp, it is best to put the salts on one pH between 5 and 8, preferably between 6 and 7, to be set. Embodiment To 100 kg of pulp with a resin content of about 1.2 per cent, about double that amount is added Amount of water and put on it 0.4 kg of the sodium salt of ethylenediaminetetraacetic acid to. After about one hour of treatment, the mass is drained and processed in the usual way in Holländer, Mischholländer, Mischbütte and on the paper machine Further.
Claims (3)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL58741D NL58741C (en) | 1940-08-19 | ||
DEC56402D DE742617C (en) | 1941-03-28 | 1941-03-28 | Process for preventing resin precipitations in paper manufacture |
CH226936D CH226936A (en) | 1940-08-19 | 1941-07-28 | Process for preventing resin deposits in paper manufacture from cellulose. |
FR874759D FR874759A (en) | 1940-08-19 | 1941-08-19 | Process for preventing resin separations in papermaking |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEC56402D DE742617C (en) | 1941-03-28 | 1941-03-28 | Process for preventing resin precipitations in paper manufacture |
Publications (1)
Publication Number | Publication Date |
---|---|
DE742617C true DE742617C (en) | 1943-12-14 |
Family
ID=7028314
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEC56402D Expired DE742617C (en) | 1940-08-19 | 1941-03-28 | Process for preventing resin precipitations in paper manufacture |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE742617C (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1034970B (en) * | 1954-06-18 | 1958-07-24 | Kopparfors Ab | Process for preventing resin excretion from wood sulfite pulp |
DE1045786B (en) * | 1955-03-09 | 1958-12-04 | Kopparfors Ab | Process for preventing resin deposits from mechanically or semi-chemically produced wood pulp products |
DE1052798B (en) * | 1952-09-11 | 1959-03-12 | Scott Paper Co | Process for bleaching wood pulp |
DE1063893B (en) * | 1956-02-18 | 1959-08-20 | Saint Gobain | Process for the digestion of lignocellulose-containing raw materials |
DE1064801B (en) * | 1956-10-26 | 1959-09-03 | Benckiser Gmbh Joh A | Process for combating congestion, blockages and slime formation in pipe systems and apparatus, especially in the pulp, wood pulp, paper and cardboard industries |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1968345A (en) * | 1933-04-03 | 1934-07-31 | Champion Fibre Company | Treating sulphite pulp |
FR811938A (en) * | 1935-10-30 | 1937-04-26 | Ig Farbenindustrie Ag | Process for preventing the formation of precipitates of metal salts insoluble in water or, where appropriate, rendering them harmless and preparations suitable therefor |
GB474518A (en) * | 1936-05-07 | 1937-11-02 | Ig Farbenindustrie Ag | Improvements in or relating to cleansing agents |
FR841424A (en) * | 1937-09-07 | 1939-05-19 | Henkel & Cie Gmbh | Washing, cleaning, bleaching and rinsing products |
FR845587A (en) * | 1937-12-01 | 1939-08-28 | Kalle & Co Ag | Desizing agent |
-
1941
- 1941-03-28 DE DEC56402D patent/DE742617C/en not_active Expired
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1968345A (en) * | 1933-04-03 | 1934-07-31 | Champion Fibre Company | Treating sulphite pulp |
FR811938A (en) * | 1935-10-30 | 1937-04-26 | Ig Farbenindustrie Ag | Process for preventing the formation of precipitates of metal salts insoluble in water or, where appropriate, rendering them harmless and preparations suitable therefor |
GB474518A (en) * | 1936-05-07 | 1937-11-02 | Ig Farbenindustrie Ag | Improvements in or relating to cleansing agents |
FR841424A (en) * | 1937-09-07 | 1939-05-19 | Henkel & Cie Gmbh | Washing, cleaning, bleaching and rinsing products |
FR845587A (en) * | 1937-12-01 | 1939-08-28 | Kalle & Co Ag | Desizing agent |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1052798B (en) * | 1952-09-11 | 1959-03-12 | Scott Paper Co | Process for bleaching wood pulp |
DE1034970B (en) * | 1954-06-18 | 1958-07-24 | Kopparfors Ab | Process for preventing resin excretion from wood sulfite pulp |
DE1045786B (en) * | 1955-03-09 | 1958-12-04 | Kopparfors Ab | Process for preventing resin deposits from mechanically or semi-chemically produced wood pulp products |
DE1063893B (en) * | 1956-02-18 | 1959-08-20 | Saint Gobain | Process for the digestion of lignocellulose-containing raw materials |
DE1064801B (en) * | 1956-10-26 | 1959-09-03 | Benckiser Gmbh Joh A | Process for combating congestion, blockages and slime formation in pipe systems and apparatus, especially in the pulp, wood pulp, paper and cardboard industries |
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