WO1995000704A1 - Method of monitoring the deposition of resins from cellulose and/or paper-pulp suspensions - Google Patents

Method of monitoring the deposition of resins from cellulose and/or paper-pulp suspensions Download PDF

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Publication number
WO1995000704A1
WO1995000704A1 PCT/EP1994/001920 EP9401920W WO9500704A1 WO 1995000704 A1 WO1995000704 A1 WO 1995000704A1 EP 9401920 W EP9401920 W EP 9401920W WO 9500704 A1 WO9500704 A1 WO 9500704A1
Authority
WO
WIPO (PCT)
Prior art keywords
cellulose
resins
native starch
paper
pulp suspensions
Prior art date
Application number
PCT/EP1994/001920
Other languages
German (de)
French (fr)
Inventor
Klaus Hornfeck
Heinz-Günther SCHULTE
Dieter Kaps
Original Assignee
Henkel Kommanditgesellschaft Auf Aktien
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Henkel Kommanditgesellschaft Auf Aktien filed Critical Henkel Kommanditgesellschaft Auf Aktien
Priority to JP7502400A priority Critical patent/JPH08511831A/en
Priority to EP94918868A priority patent/EP0705366A1/en
Priority to KR1019950705771A priority patent/KR960703187A/en
Publication of WO1995000704A1 publication Critical patent/WO1995000704A1/en
Priority to FI956115A priority patent/FI956115A0/en

Links

Classifications

    • 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
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/02—Agents for preventing deposition on the paper mill equipment, e.g. pitch or slime control

Definitions

  • the invention relates to a method for controlling the settling of resins from cellulose and / or wood pulp suspensions.
  • the resins present in the pulp and wood pulp contain about 1-5% by weight of so-called harmful resins (cf. J. Weigl et al. Das Paper, 1986. p. V52 - V 62). These can be in a colloidal unbound form or adhere to the paper fibers.
  • the adhesive properties of the resins can now have a negative effect on the one hand in the process of producing cellulose and wood pulp itself, and on the subsequent paper production.
  • the object of the present invention was therefore to develop a process for controlling the settling of resins from cellulose and / or wood pulp suspensions.
  • it was to be striven for that the auxiliaries to be used in the process are largely biologically compatible and therefore, from an ecological point of view, meet the requirements which are becoming increasingly important in the paper-processing industry today.
  • This object was achieved according to the invention by a process for controlling the settling of resins from pulp and / or pulp suspensions, the pulp and / or wood pulp suspension metered in an effective amount of a degradation product of native starch.
  • the present invention therefore relates to a process for controlling the settling of resins from pulp and / or pulp suspensions, which is characterized in that an effective amount of a degradation product of native starch is metered into the suspension.
  • Degradation products of native starch in the context of the present invention are understood to mean those products which are accessible by thermal, hydrolytic or enzymatic degradation of native starch and which have a lower average molecular weight than the underlying native starch and a higher average molecular weight than glucose, the Have a complete degradation product.
  • the products of a chemical derivatization such as the esterification, etherification, acetylation, etc. do not fall under the definition of the degradation products of native starch used here.
  • those degradation products of native starch are preferred which have an average molecular weight in the range from 1,200 to 600,000.
  • the preferred way of producing these products is acidic and enzymatic hydrolysis or a combination of these methods.
  • the type of native starch which is used to produce the degradation products suitable according to the invention is not subject to any particular restriction.
  • potato starch, corn starch, rice starch or canna starch are used as starting materials.
  • the effect of the degradation products of native starch which are suitable according to the invention can be improved by additionally carrying out the process in the presence of a cellulose derivative.
  • the cellulose derivative here is carboxymethyl cellulose, methyl hydroxypropyl cellulose, methyl cellulose,
  • Methylhydroxyethyl cellulose, hydroxyethyl cellulose and mixtures of these substances are particularly preferred.
  • Another object of the present invention is the use of degradation products of native starch to control the settling of resins from cellulose and / or pulp suspensions.
  • the degradation products of native starch according to the invention can be metered in at any point in the entire process of producing primary fibers. They are metered in either in the form of solid particles or in the form of an aqueous solution or dispersion.
  • the effective amount of the degradation products of the native starches required in each case depends on the extent to which the aqueous suspensions of the primary fibers to be processed contain adhesive resins. As a rule, however, the degradation products of native starch according to the invention are used in an amount in the range from 0.001 to 5.0% by weight, preferably 0.1 to 1.0% by weight, based on the primary fiber material.

Abstract

The invention calls for the deposition of resins from cellulose and/or paper-pulp suspensions to be monitored by adding to the suspension an effective amount of a decomposition product of native starch.

Description

"Verfahren zur Kontrolle des Absetzens von Harzen aus Zellstoff- und/oder Holzstoff- Suspensionen" "Process for controlling the settling of resins from pulp and / or pulp suspensions"
Gebiet der ErfindungField of the Invention
Die Erfindung betrifft ein Verfahren zur Kontrolle des Absetzens von Harzen aus Zellstoff- und/oder Holzstoff-Sus¬ pensionen.The invention relates to a method for controlling the settling of resins from cellulose and / or wood pulp suspensions.
Stand der TechnikState of the art
Die im Zellstoff und Holzstoff vorhandenen Harze enthalten je nach Holzsorte einen Anteil von etwa 1 - 5 Gew.-% an soge¬ nannten schädlichen Harzen (vergl. J. Weigl et al.. Das Pa¬ pier, 1986. S. V52 - V 62). Diese können in kolloidaler nichtgebundener Form vorliegen oder an den Papierfasern haften. Die klebenden Eigenschaften der Harze können nun ei¬ nerseits beim Prozeß der Herstellung von Zellstoff und Holz¬ stoff selbst, als auch beim der späteren Papierherstellung negativ in Erscheinung treten.Depending on the type of wood, the resins present in the pulp and wood pulp contain about 1-5% by weight of so-called harmful resins (cf. J. Weigl et al. Das Paper, 1986. p. V52 - V 62). These can be in a colloidal unbound form or adhere to the paper fibers. The adhesive properties of the resins can now have a negative effect on the one hand in the process of producing cellulose and wood pulp itself, and on the subsequent paper production.
Um diesen Schwierigkeiten zu begegnen, hat man etwa kationaktive Produkte als Harzverhinderungsmittel eingesetzt. So ist etwa aus dem "Fachlexikon Papier - Pappe - Zellulose" (Verlag Ringier, Zofingen CH, 1967, dort S. 97) bekannt, daß durch derartige Produkte Stoffkreisläufe, Siebe, Pressen und Filze saubergehalten und auftretende Harzschwierigkeiten bei der Zellstoff- und Papierherstellung verhindert werden kön¬ nen. Dem Hilfsmittel wird dabei eine fixierende Wirkung zu¬ geschrieben.In order to counter these difficulties, cation-active products have been used as a resin preventing agent. For example, it is known from the "Fachlexikon Papier - Pappe - Zellulose" (Verlag Ringier, Zofingen CH, 1967, p. 97) that such products keep material cycles, sieves, presses and felts clean and that resin problems occur in the manufacture of pulp and paper can be prevented. A fixing effect is attributed to the aid.
Im Rahmen der vorliegenden Erfindung sind diejenigen Probleme angesprochen, die bei der Handhabung wäßriger Suspensionen von Primärfaserstoff, wozu der Fachmann Zellstoff und Holz¬ stoff zählt, durch die klebenden Harze entstehen; Die kle¬ benden Harze setzen sich in Stoffleitungen, an Wänden, Sieben und Filzen fest und führen zu Störungen im Prozeßablauf der Herstellung der Primärfasern.Within the scope of the present invention, those problems are addressed which arise in the handling of aqueous suspensions of primary fibrous material, which include the person skilled in the art pulp and wood pulp, due to the adhesive resins; The adhesive resins settle in fabric lines, on walls, screens and felts and lead to disturbances in the process flow of the production of the primary fibers.
Beschreibung der ErfindungDescription of the invention
Aufgabe der vorliegenden Erfindung war es daher, ein Verfah¬ ren zur Kontrolle des Absetzens von Harzen aus Zellstoff- und/oder Holzstoff-Suspensionen zu entwickeln. Darüber hinaus war anzustreben, daß die bei dem Verfahren einzusetzenden Hilfsstoffe weitgehend biologisch verträglich sind und daher unter ökologischen Gesichtspunkten den Anforderungen ent¬ sprechen, die heutzutage in der papierverarbeitenden Indu¬ strie zunehmend wichtiger werden.The object of the present invention was therefore to develop a process for controlling the settling of resins from cellulose and / or wood pulp suspensions. In addition, it was to be striven for that the auxiliaries to be used in the process are largely biologically compatible and therefore, from an ecological point of view, meet the requirements which are becoming increasingly important in the paper-processing industry today.
Diese Aufgabe wurde erfindungsgemäß gelöst durch ein Verfah¬ ren zur Kontrolle des Absetzens von Harzen aus Zellstoff- und/oder Holzstoff-Suspensionen, wobei man der Zellstoff- und/oder Holzstoff-Suspension eine wirksame Menge eines Ab¬ bauproduktes von nativer Stärke zudosiert.This object was achieved according to the invention by a process for controlling the settling of resins from pulp and / or pulp suspensions, the pulp and / or wood pulp suspension metered in an effective amount of a degradation product of native starch.
Gegenstand der vorliegenden Erfindung ist daher ein Verfahren zur Kontrolle des Absetzens von Harzen aus Zellstoff-und/oder Holzstoff-Suspensionen, das dadurch gekennzeichnet ist, daß man der Suspension eine wirksame Menge eines Abbauproduktes von nativer Stärke zudosiert.The present invention therefore relates to a process for controlling the settling of resins from pulp and / or pulp suspensions, which is characterized in that an effective amount of a degradation product of native starch is metered into the suspension.
Unter Abbauprodukten von nativer Stärke sind im Rahmen der vorliegenden Erfindung diejenigen Produkte zu verstehen, die durch thermischen, hydrolytischen oder enzymatisehen Abbau von nativer Stärke zugänglich sind und ein niedrigeres mitt¬ leres Molekulargewicht als die zugrundeliegende native Stärke sowie ein höheres mittleres Molgewicht als Glucose, dem Pro¬ dukt eines vollständigen Abbaus aufweisen. Ausdrücklich sei jedoch festgestellt, daß die Produkte einer chemischen Derivatisierung wie der Versterung, Veretherung, Acetylierung, usw. nicht unter die hier verwendete Definition der Abbauprodukte von nativer Stärke fallen.Degradation products of native starch in the context of the present invention are understood to mean those products which are accessible by thermal, hydrolytic or enzymatic degradation of native starch and which have a lower average molecular weight than the underlying native starch and a higher average molecular weight than glucose, the Have a complete degradation product. However, it should be expressly stated that the products of a chemical derivatization such as the esterification, etherification, acetylation, etc. do not fall under the definition of the degradation products of native starch used here.
Im Rahmen dieser Erfindung sind diejenigen Abbauprodukte na¬ tiver Stärke bevorzugt, die ein mittleres Molekulargewicht im Bereich von 1.200 bis 600.000 aufweisen. Die bevorzugte Art der Herstellung dieser Produkte ist die saure und die enzy- matische Hydrolyse oder eine Kombination dieser Methoden.In the context of this invention, those degradation products of native starch are preferred which have an average molecular weight in the range from 1,200 to 600,000. The preferred way of producing these products is acidic and enzymatic hydrolysis or a combination of these methods.
Die Art der nativen Stärke, die der zur Herstellung der erfindungsgemäß geeigneten Abbauprodukte herangezogen wird, unterliegt an sich keiner besonderen Einschränkung. So können z.B. Kartoffelstärke, Maisstärke, Reisstärke oder Cannastärke als Ausgangsstoffe herangezogen werden. Es ist jedoch beson¬ ders bevorzugt, Abbauprodukte von Kartoffelstärke einzuset¬ zen.The type of native starch which is used to produce the degradation products suitable according to the invention is not subject to any particular restriction. For example, potato starch, corn starch, rice starch or canna starch are used as starting materials. However, it is particularly preferred to use degradation products from potato starch.
Es hat sich ferner herausgestellt, daß die Wirkung der erfindungsgemäß geeigneten Abbauprodukte von nativer Stärke dadurch verbessert werden kann, daß man das Verfahren zu¬ sätzlich in Gegenwart eines Cellulosederivats durchführt. Dabei sind als Cellulosederivat Carboxymethylcellulose, Methylhydroxypropylcellulose, Methylcellulose,It has also been found that the effect of the degradation products of native starch which are suitable according to the invention can be improved by additionally carrying out the process in the presence of a cellulose derivative. The cellulose derivative here is carboxymethyl cellulose, methyl hydroxypropyl cellulose, methyl cellulose,
Methylhydroxyethylcellulose, Hydroxyethylcellulose sowie Mi¬ schungen dieser Stoffe besonders bevorzugt.Methylhydroxyethyl cellulose, hydroxyethyl cellulose and mixtures of these substances are particularly preferred.
Ein weiterer Gegenstand der vorliegenden Erfindung ist die Verwendung von Abbauprodukten von nativer Stärke zur Kon¬ trolle des Absetzens von Harzen aus Zellstoff- und/oder Holzstoff-Suspensionen.Another object of the present invention is the use of degradation products of native starch to control the settling of resins from cellulose and / or pulp suspensions.
Die erfindungsgemäßen Abbauprodukte von nativer Stärke können im Prinzip an jeder Stelle des gesamten Prozesses der Her¬ stellung von Primärfasern zudosiert werden. Sie werden dabei entweder in Form fester Teilchen oder in Form einer wäßrigen Lösung oder Dispersion zudosiert. Die jeweils erforderliche wirksame Menge der Abbauprodukte der nativen Stärken hängt dabei davon ab, in welchem Ausmaß die zu verarbeitenden wä߬ rigen Suspensionen der Primärfasern klebende Harze enthalten. In der Regel werden die erfindungsgemäßen Abbauprodukte na¬ tiver Stärke jedoch in einer Menge im Bereich von 0,001 bis 5,0 Gew.-%, vorzugsweise 0,1 bis 1,0 Gew.-%, - bezogen auf den Primärfaserstoff - eingesetzt. In principle, the degradation products of native starch according to the invention can be metered in at any point in the entire process of producing primary fibers. They are metered in either in the form of solid particles or in the form of an aqueous solution or dispersion. The effective amount of the degradation products of the native starches required in each case depends on the extent to which the aqueous suspensions of the primary fibers to be processed contain adhesive resins. As a rule, however, the degradation products of native starch according to the invention are used in an amount in the range from 0.001 to 5.0% by weight, preferably 0.1 to 1.0% by weight, based on the primary fiber material.

Claims

P a t e n t a n s p r ü c h e P a t e n t a n s r u c h e
1. Verfahren zur Kontrolle des Absetzens von Harzen aus Zell¬ stoff- und/oder HolzStoff-Suspensionen, dadurch gekenn¬ zeichnet, daß man der Suspension eine wirksame Menge eines Abbauproduktes von nativer Stärke zudosiert.1. A process for controlling the settling of resins from cellulose and / or pulp suspensions, characterized in that an effective amount of a degradation product of native starch is metered into the suspension.
2. Verfahren nach Anspruch 1, wobei man ein Abbauprodukt von Kartoffelstärke einsetzt.2. The method according to claim 1, wherein one uses a degradation product of potato starch.
3. Verfahren nach Anspruch 1 oder 2, wobei das mitt-lere Mole¬ kulargewicht des Abbauprodukts nativer Stärke im Bereich von 1.200 bis 600.000 liegt.3. The method of claim 1 or 2, wherein the average molecular weight of the degradation product of native starch is in the range of 1,200 to 600,000.
3. Verfahren nach einem der Ansprüche 1 bis 3, wobei man das Verfahren zusätzlich in Gegenwart eines Cellulosederivats durchführt.3. The method according to any one of claims 1 to 3, wherein the method is additionally carried out in the presence of a cellulose derivative.
4. Verfahren nach Anspmich 4, wobei man ein Cellulosederivat einsetzt, daß ausgewählt ist aus der Gruppe Carboxymethyl- cellulose, Methylhydroxypropylcellulose, Methylcellulose, Methylhydroxyethylcellulose und Hydroxyethylcellulose.4. The method according to claim 4, wherein a cellulose derivative is used which is selected from the group carboxymethyl cellulose, methyl hydroxypropyl cellulose, methyl cellulose, methyl hydroxyethyl cellulose and hydroxyethyl cellulose.
6. Verwendung von Abbauprodukten von nativer Stärke zur Kon¬ trolle des Absetzens von Harzen aus Zellstoff- und/oder Holzstoff-Suspensionen.6. Use of degradation products of native starch to control the settling of resins from cellulose and / or wood pulp suspensions.
7. Verwendung nach Anspruch 6, wobei das Abbauprodukt von na¬ tiver Stärke aus Kartoffelstärke hergestellt wurde. 7. Use according to claim 6, wherein the degradation product of native starch was produced from potato starch.
PCT/EP1994/001920 1993-06-21 1994-06-13 Method of monitoring the deposition of resins from cellulose and/or paper-pulp suspensions WO1995000704A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP7502400A JPH08511831A (en) 1993-06-21 1994-06-13 Method for controlling sedimentation of resin from cellulose and / or paper pulp suspension
EP94918868A EP0705366A1 (en) 1993-06-21 1994-06-13 Method of monitoring the deposition of resins from cellulose and/or paper-pulp suspensions
KR1019950705771A KR960703187A (en) 1993-06-21 1994-06-13 METHOD OF MONITORING THE DEPOSITION OF RESINS FROM CELLULOSE AND / OR PAPER-PULP SUSPENSIONS
FI956115A FI956115A0 (en) 1993-06-21 1995-12-19 Method for controlling resin deposition from cellulose and / or pulp suspensions

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP4320453.8 1993-06-21
DE4320453A DE4320453A1 (en) 1993-06-21 1993-06-21 Process for controlling the settling of resins from pulp and / or pulp suspensions

Publications (1)

Publication Number Publication Date
WO1995000704A1 true WO1995000704A1 (en) 1995-01-05

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PCT/EP1994/001920 WO1995000704A1 (en) 1993-06-21 1994-06-13 Method of monitoring the deposition of resins from cellulose and/or paper-pulp suspensions

Country Status (6)

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EP (1) EP0705366A1 (en)
JP (1) JPH08511831A (en)
KR (1) KR960703187A (en)
DE (1) DE4320453A1 (en)
FI (1) FI956115A0 (en)
WO (1) WO1995000704A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19704054A1 (en) * 1997-02-04 1998-08-06 Stockhausen Chem Fab Gmbh Process for the production of fibrous materials with improved properties
US6006189A (en) * 1997-10-10 1999-12-21 Nortel Networks Corporation Method and apparatus for storing and forwarding voice signals
US6026356A (en) * 1997-07-03 2000-02-15 Nortel Networks Corporation Methods and devices for noise conditioning signals representative of audio information in compressed and digitized form

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2686257C (en) * 2007-05-16 2013-07-02 Buckman Laboratories International, Inc. Methods to control organic contaminants in fibers

Citations (2)

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Publication number Priority date Publication date Assignee Title
US3102065A (en) * 1961-03-22 1963-08-27 Virginia Chemicals & Smelting Method and composition for dispersing of pitch
US4923566A (en) * 1988-07-19 1990-05-08 Nalco Chemical Company Method of pacifying stickies in paper

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3102065A (en) * 1961-03-22 1963-08-27 Virginia Chemicals & Smelting Method and composition for dispersing of pitch
US4923566A (en) * 1988-07-19 1990-05-08 Nalco Chemical Company Method of pacifying stickies in paper

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EICHHORN, R. ET AL: "Neueste Erkenntnisse bei der Produktion von Zeitungsdruckpapier auf Basis Recyclingfaser und TMP.", WOCHENBL. PAPIERFABR., vol. 119, no. 3, 15 February 1991 (1991-02-15), pages 82 - 84 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19704054A1 (en) * 1997-02-04 1998-08-06 Stockhausen Chem Fab Gmbh Process for the production of fibrous materials with improved properties
DE19704054C2 (en) * 1997-02-04 2000-08-10 Stockhausen Chem Fab Gmbh Process for the production of fibrous materials with improved properties
US6344108B1 (en) 1997-02-04 2002-02-05 Stockhausen Gmbh & Co. Kg Using a dicarboxylic acid dialkyl ester brightening
US6026356A (en) * 1997-07-03 2000-02-15 Nortel Networks Corporation Methods and devices for noise conditioning signals representative of audio information in compressed and digitized form
US6006189A (en) * 1997-10-10 1999-12-21 Nortel Networks Corporation Method and apparatus for storing and forwarding voice signals

Also Published As

Publication number Publication date
KR960703187A (en) 1996-06-19
FI956115A (en) 1995-12-19
DE4320453A1 (en) 1994-12-22
FI956115A0 (en) 1995-12-19
EP0705366A1 (en) 1996-04-10
JPH08511831A (en) 1996-12-10

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