EP0497671B1 - Method of refining a paper pulp - Google Patents
Method of refining a paper pulp Download PDFInfo
- Publication number
- EP0497671B1 EP0497671B1 EP92400190A EP92400190A EP0497671B1 EP 0497671 B1 EP0497671 B1 EP 0497671B1 EP 92400190 A EP92400190 A EP 92400190A EP 92400190 A EP92400190 A EP 92400190A EP 0497671 B1 EP0497671 B1 EP 0497671B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- refining
- paper pulp
- pulp
- silica sol
- weight
- 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 - Lifetime
Links
- 238000007670 refining Methods 0.000 title claims description 20
- 238000000034 method Methods 0.000 title claims description 15
- 229920001131 Pulp (paper) Polymers 0.000 title claims description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 19
- 239000008119 colloidal silica Substances 0.000 claims description 6
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 description 5
- 238000005470 impregnation Methods 0.000 description 3
- 150000002978 peroxides Chemical class 0.000 description 3
- 229920002522 Wood fibre Polymers 0.000 description 2
- 239000002738 chelating agent Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 239000002025 wood fiber Substances 0.000 description 2
- 235000018185 Betula X alpestris Nutrition 0.000 description 1
- 235000018212 Betula X uliginosa Nutrition 0.000 description 1
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- UDHXJZHVNHGCEC-UHFFFAOYSA-N Chlorophacinone Chemical compound C1=CC(Cl)=CC=C1C(C=1C=CC=CC=1)C(=O)C1C(=O)C2=CC=CC=C2C1=O UDHXJZHVNHGCEC-UHFFFAOYSA-N 0.000 description 1
- 241000218631 Coniferophyta Species 0.000 description 1
- 244000166124 Eucalyptus globulus Species 0.000 description 1
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000007900 aqueous suspension Substances 0.000 description 1
- 238000004061 bleaching Methods 0.000 description 1
- 239000007844 bleaching agent Substances 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 244000144992 flock Species 0.000 description 1
- 229910001425 magnesium ion Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- 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
Definitions
- the present invention relates to a new process for refining paper pulp.
- refining is an essential operation which consumes more energy the higher the desired refining index.
- the process according to the present invention is characterized in that a colloidal silica sol is added to the refining paste to reduce the time necessary to refine said paste.
- colloidal silica sol denotes 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.
- 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.
- 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.
- 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.
- the method according to the invention makes it possible to considerably reduce the duration of refining of paper pulps of various origin.
- 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.
- the method according to the invention makes it possible to reduce the duration of the refining by 10 minutes, ie a saving of time by approximately 33%.
- Table I the Shoepper-Riegler refining indices obtained as a function of time are mentioned.
Landscapes
- 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)
- Silicon Compounds (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
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.
Il a été également proposé dans WO-A-8701746, afin de réduire notamment les coûts de raffinage, d'associer au raffinage un prétraitement de blanchiment, multistades, des copeaux de bois destinés à être transformés en pâte à papier avec successivement trois solutions d'imprégnation aqueuse contenant pour les deux premières, des stabilisants de peroxyde tels que des ions magnésium ou silicates associés éventuellement à un agent chélatant et pour la troisième un peroxyde en présence éventuellement d'agents stabilisants de peroxyde et/ou chélatants, dans des conditions de pH, de température et de concentration telles que la deuxième solution d'imprégnation forme un floc ou un sol à l'intérieur des fibres de bois au contact de la première solution d'imprégnation. Toutefois, ce procédé est onéreux du fait qu'il nécessite un prétraitement des fibres de bois, et, en outre, il ne peut être mis en oeuvre que si on souhaite effectuer un blanchiment de la pâte à papier.It has also been proposed in WO-A-8701746, in order to reduce in particular the costs of refining, to combine with refining a bleaching pretreatment, multi-stage, wood chips intended to be transformed into paper pulp with successively three solutions of '' aqueous impregnation containing for the first two, peroxide stabilizers such as magnesium ions or silicates optionally combined with a chelating agent and for the third a peroxide in the possible presence of peroxide stabilizing agents and / or chelating agents, under conditions of pH, temperature and concentration such that the second impregnation solution forms a flock or a soil inside the wood fibers in contact with the first impregnation solution. However, this process is expensive because it requires a pretreatment of the wood fibers, and, moreover, it can only be implemented if it is desired to bleach the pulp.
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 they have in particular planned to carry out 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.Now the Applicant has surprisingly discovered a new process for refining pulp clearly less expensive than known methods.
Le procédé selon la présente invention est caractérisé en ce que l'on ajoute à la pâte à Raffiner un sol de silice colloïdale pour réduire le temps nécessaire pour raffiner ladite pâte.The process according to the present invention is characterized in that a colloidal silica sol is added to the refining paste to reduce the time necessary to refine said paste.
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 denotes 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 method 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 duration of refining of paper pulps of various origin. 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.
Claims (3)
- Refining process for paper pulp, characterized in that a colloidal silica sol is added to the pulp to be refined in order to reduce the time required for refining said pulp.
- Process according to claim 1, characterized in that the silica sol used has silica particles with an average diameter comprised between 10 nm and 50 nm.
- Process according to claim 1 or 2, characterized in that 1 to 50% by weight of colloidal silica sol expressed in the dry state is used relative to the weight of paper pulp expressed in the dry state.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9101108 | 1991-01-31 | ||
| FR9101108A FR2672315B1 (en) | 1991-01-31 | 1991-01-31 | NEW PROCESS FOR REFINING PAPER PULP. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0497671A1 EP0497671A1 (en) | 1992-08-05 |
| EP0497671B1 true 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)
| 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 |
| PT3617400T (en) | 2009-03-30 | 2022-12-30 | Fiberlean Tech Ltd | Use of nanofibrillar cellulose suspensions |
| EP2805986B1 (en) | 2009-03-30 | 2017-11-08 | FiberLean Technologies Limited | Process for the production of nano-fibrillar cellulose gels |
| GB0908401D0 (en) | 2009-05-15 | 2009-06-24 | Imerys Minerals Ltd | Paper filler composition |
| SI2386682T1 (en) | 2010-04-27 | 2014-07-31 | Omya International Ag | Process for the manufacture of 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 |
| CN108137849B (en) | 2015-10-14 | 2020-10-20 | 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 |
| WO2017175062A1 (en) | 2016-04-05 | 2017-10-12 | Fiberlean Technologies Limited | Paper and paperboard products |
| WO2017182877A1 (en) | 2016-04-22 | 2017-10-26 | Fiberlean Technologies Limited | Fibres comprising microfibrillated cellulose and methods of manufacturing fibres and nonwoven materials therefrom |
| 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 (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1987001746A1 (en) * | 1985-09-20 | 1987-03-26 | Scott Paper Company | Method of pretreating pulp with stabilizers and peroxide prior to mechanical refining |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3023140A (en) * | 1958-11-24 | 1962-02-27 | Bauer Bros Co | Pulp bleaching |
| US3069309A (en) * | 1961-02-01 | 1962-12-18 | Du Pont | Pulp bleaching |
| 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 |
| US4229250A (en) * | 1979-02-28 | 1980-10-21 | Valmet Oy | Method of improving properties of mechanical paper pulp without chemical reaction therewith |
| 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 |
| 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 |
| JP2633671B2 (en) * | 1989-01-18 | 1997-07-23 | 日本製紙 株式会社 | Inkjet recording sheet |
-
1991
- 1991-01-31 FR FR9101108A patent/FR2672315B1/en not_active Expired - Fee Related
-
1992
- 1992-01-24 DE DE69202346T patent/DE69202346T2/en not_active Expired - Fee Related
- 1992-01-24 EP EP92400190A patent/EP0497671B1/en not_active Expired - Lifetime
- 1992-01-29 FI FI920395A patent/FI98078C/en not_active IP Right Cessation
- 1992-01-30 NO NO920405A patent/NO179459C/en unknown
- 1992-01-30 CA CA002060395A patent/CA2060395A1/en not_active Abandoned
- 1992-01-31 US US07/828,760 patent/US5225041A/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1987001746A1 (en) * | 1985-09-20 | 1987-03-26 | Scott Paper Company | Method of pretreating pulp with stabilizers and peroxide prior to mechanical refining |
Also Published As
| Publication number | Publication date |
|---|---|
| DE69202346T2 (en) | 1995-09-28 |
| EP0497671A1 (en) | 1992-08-05 |
| FR2672315A1 (en) | 1992-08-07 |
| FR2672315B1 (en) | 1996-06-07 |
| FI98078C (en) | 1997-04-10 |
| US5225041A (en) | 1993-07-06 |
| NO179459C (en) | 1996-10-09 |
| CA2060395A1 (en) | 1992-08-01 |
| NO920405L (en) | 1992-08-03 |
| FI920395A0 (en) | 1992-01-29 |
| NO179459B (en) | 1996-07-01 |
| FI98078B (en) | 1996-12-31 |
| DE69202346D1 (en) | 1995-06-14 |
| FI920395A (en) | 1992-08-01 |
| NO920405D0 (en) | 1992-01-30 |
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