EP0497671A1 - Method of refining a paper pulp - Google Patents

Method of refining a paper pulp Download PDF

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Publication number
EP0497671A1
EP0497671A1 EP92400190A EP92400190A EP0497671A1 EP 0497671 A1 EP0497671 A1 EP 0497671A1 EP 92400190 A EP92400190 A EP 92400190A EP 92400190 A EP92400190 A EP 92400190A EP 0497671 A1 EP0497671 A1 EP 0497671A1
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EP
European Patent Office
Prior art keywords
refining
paper pulp
silica sol
silica
weight
Prior art date
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Granted
Application number
EP92400190A
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German (de)
French (fr)
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EP0497671B1 (en
Inventor
Michel Richard
Christian Roux
Claude Trouve
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Sanofi Aventis France
Original Assignee
Francaise Hoechst Ste
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Application filed by Francaise Hoechst Ste filed Critical Francaise Hoechst Ste
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    • 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
    • D21B1/14—Disintegrating in mills
    • D21B1/16—Disintegrating in mills in the presence of chemical agents
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D1/00—Methods of beating or refining; Beaters of the Hollander type
    • D21D1/20—Methods of refining

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)

Abstract

Improvement to the processes for refining paper pulp, in which a colloidal silica sol is mixed with the paper pulp to be refined.

Description

La présente invention concerne un nouveau procédé de raffinage de la pâte à papier.The present invention relates to a new process for refining paper pulp.

Dans l'élaboration de la pâte à papier, le raffinage est une opération essentielle qui consomme une énergie d'autant plus importante que l'indice de raffinage recherché est plus élevé.In the production of paper pulp, refining is an essential operation which consumes more energy the higher the desired refining index.

De tout temps, les papetiers ont recherché des moyens de réduire les coûts énergétiques du raffinage de la pâte à papier et ils ont ainsi notamment envisagé d'effectuer le raffinage en présence de carboxyméthylcellulose ou même de rouge congo, solutions intéressantes, mais toutefois abandonnées en raison d'une part, des viscosités obtenues anormalement élevées, et d'autre part, des colorations des pâtes apportées par l'emploi de rouge congo. Si bien qu'aujourd'hui, le raffinage des pâtes à papier est dans la grande majorité des cas, effectué sans l'emploi d'additifs avec une consommation élevée d'énergie.Historically, papermakers have been looking for ways to reduce the energy costs of refining paper pulp, and in particular they have considered refining in the presence of carboxymethylcellulose or even red congo, interesting solutions, but however abandoned in on the one hand, the viscosities obtained abnormally high, and on the other hand, the colorings of the pastes provided by the use of red congo. So that today, the refining of paper pulp is in the vast majority of cases, carried out without the use of additives with a high energy consumption.

Or la demanderesse a découvert avec étonnement un nouveau procédé de raffinage de la pâte à papier nettement moins onéreux que les procédés connus.However, the Applicant has surprisingly discovered a new process for refining paper pulp which is considerably less expensive than the known processes.

Le procédé selon la présente invention est caractérisé en ce qu'il est effectué en présence d'un sol de silice colloïdale.The method according to the present invention is characterized in that it is carried out in the presence of a colloidal silica sol.

On désigne par sol de silice colloïdale des suspensions aqueuses de particules élémentaires de silice présentant un diamètre moyen inférieur à 100 nm et non-agglomérées entre elles. Ces sols de silice sont des produits commerciaux courants tels ceux commercialisés par la demanderesse sous la dénomination KLEBOSOL.The term “colloidal silica sol” designates aqueous suspensions of elementary silica particles having an average diameter of less than 100 nm and which are not agglomerated with one another. These silica soils are common commercial products such as those marketed by the applicant under the name KLEBOSOL.

Dans des conditions avantageuses de mise en oeuvre de l'invention, le procédé ci-dessus décrit est réalisé en présence d'un sol de silice colloïdale dont les particules élémentaires ont un diamètre moyen compris entre environ 10 nm et 50 nm.Under advantageous conditions for implementing the invention, the process described above is carried out in the presence of a colloidal silica sol, the elementary particles of which have an average diameter of between approximately 10 nm and 50 nm.

Le procédé selon l'invention sera effectué de préférence en présence de 1 à 50 % en poids de silice colloïdale exprimé en sec par rapport au poids de la pâte à papier exprimé également en sec.The process according to the invention will preferably be carried out in the presence of 1 to 50% by weight of silica colloidal expressed in dry relative to the weight of the paper pulp also expressed in dry.

Selon le procédé de l'invention, on mélange le sol de silice et la pâte à raffiner, par exemple par incorporation de ladite silice dans la pâte à papier à raffiner, puis le raffinage est effectué d'une manière classique dans un raffineur industriel conventionnel jusqu'à l'obtention de l'indice de raffinage Shopper-Riegler souhaité, habituellement de l'ordre de 30 à 40. La pâte à papier ainsi obtenue est ensuite utilisée comme les pâtes à papier raffinées conventionnellement.According to the process of the invention, the silica sol and the pulp to be refined are mixed, for example by incorporating said silica into the paper pulp to be refined, then the refining is carried out in a conventional manner in a conventional industrial refiner until the desired Shopper-Riegler refining index is obtained, usually of the order of 30 to 40. The pulp thus obtained is then used like conventionally refined pulp.

Le procédé selon l'invention permet de réduire considérablement la durée de raffinage des pâtes à papier d'origine diverse. Généralement, le gain de temps pour l'obtention d'un indice de raffinage Shopper-Riegler de l'ordre de 35 est de 30 à 35 % par rapport au procédé effectué en l'absence de sol de silice colloïdale.The method according to the invention makes it possible to considerably reduce the refining time of paper pulps of various origins. Generally, the time saving for obtaining a Shopper-Riegler refining index of the order of 35 is 30 to 35% compared to the process carried out in the absence of colloidal silica sol.

Ainsi, par exemple, au départ de 360 g d'une pâte à papier contenant pondéralement 30 % d'eucalyptus, 45 % de bouleau et 25 % de conifères, contenant donc 25 % de fibres longues, raffinée selon la norme AFNOR Q 50-008 à l'aide d'une pile valley, l'obtention d'un indice de raffinage Shoepper-Riegler de 45 demande environ 34 minutes en l'absence de sol de silice et seulement 24 minutes en présence de 545 g d'un sol de silice contenant pondéralement 67 % d'eau et 33 % de silice sous forme de particules élémentaires non-agglomérées d'un diamètre moyen de 13 nm. Ainsi, pour l'obtention d'un indice de raffinage identique au départ d'une pâte identique, le procédé selon l'invention permet de diminuer la durée du raffinage de 10 minutes, soit un gain de temps de 33 % environ. Dans le tableau I, on a mentionné les indices de raffinage Shoepper-Riegler obtenus en fonction du temps.

Figure imgb0001
Thus, for example, starting from 360 g of a paper pulp containing by weight 30% of eucalyptus, 45% of birch and 25% of conifers, therefore containing 25% of long fibers, refined according to standard AFNOR Q 50- 008 using a valley stack, obtaining a Shoepper-Riegler refinement index of 45 requires approximately 34 minutes in the absence of silica sol and only 24 minutes in the presence of 545 g of a sol of silica containing by weight 67% of water and 33% of silica in the form of non-agglomerated elementary particles with an average diameter of 13 nm. Thus, to obtain an identical refining index from an identical dough, the method according to the invention makes it possible to reduce the duration of the refining by 10 minutes, that is to say a saving of time of approximately 33%. In Table I, the Shoepper-Riegler refining indices obtained as a function of time are mentioned.
Figure imgb0001

Claims (3)

Procédé de raffinage de pâte à papier caractérisé en ce qu'il est effectué en présence d'un sol de silice colloïdale.Process for refining paper pulp, characterized in that it is carried out in the presence of a colloidal silica sol. Procédé selon la revendication 1 caractérisé en ce que le sol de silice utilisé présente des particules de silice d'un diamètre moyen compris entre 10 nm et 50 nm.Process according to Claim 1, characterized in that the silica sol used has silica particles with an average diameter of between 10 nm and 50 nm. Procédé selon l'une quelconque des revendications 1 ou 2 caractérisé en ce que l'on utilise de 1 à 50 % en poids de silice colloïdale exprimé en sec par rapport au poids de la pâte à papier exprimé en sec.Process according to either of Claims 1 and 2, characterized in that 1 to 50% by weight of colloidal silica expressed in dry terms relative to the weight of the paper pulp expressed in dryness is used.
EP92400190A 1991-01-31 1992-01-24 Method of refining a paper pulp Expired - Lifetime EP0497671B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9101108A FR2672315B1 (en) 1991-01-31 1991-01-31 NEW PROCESS FOR REFINING PAPER PULP.
FR9101108 1991-01-31

Publications (2)

Publication Number Publication Date
EP0497671A1 true EP0497671A1 (en) 1992-08-05
EP0497671B1 EP0497671B1 (en) 1995-05-10

Family

ID=9409242

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92400190A Expired - Lifetime EP0497671B1 (en) 1991-01-31 1992-01-24 Method of refining a paper pulp

Country Status (7)

Country Link
US (1) US5225041A (en)
EP (1) EP0497671B1 (en)
CA (1) CA2060395A1 (en)
DE (1) DE69202346T2 (en)
FI (1) FI98078C (en)
FR (1) FR2672315B1 (en)
NO (1) NO179459C (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5571494A (en) * 1995-01-20 1996-11-05 J. M. Huber Corporation Temperature-activated polysilicic acids
US6159335A (en) * 1997-02-21 2000-12-12 Buckeye Technologies Inc. Method for treating pulp to reduce disintegration energy
US6074530A (en) * 1998-01-21 2000-06-13 Vinings Industries, Inc. Method for enhancing the anti-skid or friction properties of a cellulosic fiber
US7726592B2 (en) * 2003-12-04 2010-06-01 Hercules Incorporated Process for increasing the refiner production rate and/or decreasing the specific energy of pulping wood
EP3617400B1 (en) 2009-03-30 2022-09-21 FiberLean Technologies Limited Use of nanofibrillar cellulose suspensions
DK2805986T3 (en) 2009-03-30 2017-12-18 Fiberlean Tech Ltd PROCEDURE FOR THE MANUFACTURE OF NANO-FIBRILLARY CELLULOS GELS
GB0908401D0 (en) 2009-05-15 2009-06-24 Imerys Minerals Ltd Paper filler composition
DK2386682T3 (en) 2010-04-27 2014-06-23 Omya Int Ag Process for preparing structured materials using nano-fibrillar cellulose gels
PL2386683T3 (en) 2010-04-27 2014-08-29 Omya Int Ag Process for the production of gel-based composite materials
GB201019288D0 (en) 2010-11-15 2010-12-29 Imerys Minerals Ltd Compositions
CN112094432B (en) 2015-10-14 2022-08-05 纤维精益技术有限公司 Sheet material capable of three-dimensional forming
US11846072B2 (en) 2016-04-05 2023-12-19 Fiberlean Technologies Limited Process of making paper and paperboard products
PT3828339T (en) 2016-04-05 2024-01-02 Fiberlean Tech Ltd Paper and paperboard products
DK3445900T3 (en) 2016-04-22 2022-08-01 Fiberlean Tech Ltd FIBERS COMPRISING MICROFIBRILLATED CELLULOSE AND METHODS FOR MANUFACTURE OF FIBERS AND NONWOVEN MATERIALS THEREOF
JP6855903B2 (en) * 2017-04-24 2021-04-07 セイコーエプソン株式会社 Processing equipment and sheet manufacturing equipment

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3069309A (en) * 1961-02-01 1962-12-18 Du Pont Pulp bleaching
GB929731A (en) * 1958-11-24 1963-06-26 Bauer Bros Co Pulp bleaching
US4229250A (en) * 1979-02-28 1980-10-21 Valmet Oy Method of improving properties of mechanical paper pulp without chemical reaction therewith
EP0379964A1 (en) * 1989-01-18 1990-08-01 Nippon Paper Industries Co., Ltd. Ink jet printer recording sheet

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE436368B (en) * 1979-01-12 1984-12-03 Sunds Defibrator METHODS OF MANUFACTURING BLEACHED, MECHANICAL, CHEMICAL MECHANICAL AND SEMI-CHEMICAL MASSES OF LIGNOCELLULOSE FIBER MATERIALS
SE8107078L (en) * 1981-11-27 1983-05-28 Eka Ab PAPER MANUFACTURING PROCEDURE
US4849053A (en) * 1985-09-20 1989-07-18 Scott Paper Company Method for producing pulp using pre-treatment with stabilizers and defibration
WO1987001746A1 (en) * 1985-09-20 1987-03-26 Scott Paper Company Method of pretreating pulp with stabilizers and peroxide prior to mechanical refining
US4643801A (en) * 1986-02-24 1987-02-17 Nalco Chemical Company Papermaking aid
US4795531A (en) * 1987-09-22 1989-01-03 Nalco Chemical Company Method for dewatering paper

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB929731A (en) * 1958-11-24 1963-06-26 Bauer Bros Co Pulp bleaching
US3069309A (en) * 1961-02-01 1962-12-18 Du Pont Pulp bleaching
US4229250A (en) * 1979-02-28 1980-10-21 Valmet Oy Method of improving properties of mechanical paper pulp without chemical reaction therewith
EP0379964A1 (en) * 1989-01-18 1990-08-01 Nippon Paper Industries Co., Ltd. Ink jet printer recording sheet

Also Published As

Publication number Publication date
EP0497671B1 (en) 1995-05-10
DE69202346D1 (en) 1995-06-14
NO179459B (en) 1996-07-01
NO179459C (en) 1996-10-09
DE69202346T2 (en) 1995-09-28
FI98078B (en) 1996-12-31
US5225041A (en) 1993-07-06
CA2060395A1 (en) 1992-08-01
FI98078C (en) 1997-04-10
FI920395A0 (en) 1992-01-29
NO920405D0 (en) 1992-01-30
FR2672315B1 (en) 1996-06-07
NO920405L (en) 1992-08-03
FR2672315A1 (en) 1992-08-07
FI920395A (en) 1992-08-01

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