EP0880616B1 - Verwendung von zuckerrübenpulpe in der papier- oder pappeherstellung - Google Patents

Verwendung von zuckerrübenpulpe in der papier- oder pappeherstellung Download PDF

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Publication number
EP0880616B1
EP0880616B1 EP97904489A EP97904489A EP0880616B1 EP 0880616 B1 EP0880616 B1 EP 0880616B1 EP 97904489 A EP97904489 A EP 97904489A EP 97904489 A EP97904489 A EP 97904489A EP 0880616 B1 EP0880616 B1 EP 0880616B1
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Prior art keywords
pulp
fermented
paper
stage
sugar beet
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French (fr)
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EP0880616A1 (de
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Emile Wong
Massimo Bregola
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Eridania Beghin Say SA
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Eridania Beghin Say SA
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    • 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
    • D21H17/02—Material of vegetable origin
    • 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
    • D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
    • D21H11/12—Pulp from non-woody plants or crops, e.g. cotton, flax, straw, bagasse

Definitions

  • the present invention relates to the use of beet pulps with fermented sugar in the manufacture of paper or cardboard.
  • the current also relates to a method for manufacturing beet pulp fermented.
  • the present invention describes a method for treating pulps beet to obtain a product with good characteristics as a substitute ingredient in the manufacture of paper.
  • Paper is a film made up of a network of individual fibers welded. In general, its manufacture goes through a wet process which involves cellulosic fibers. Paper pulp is produced from wood and composition varies according to the qualities of paper. The leaf forms after draining of a uniform deposit on a canvas provided for this purpose. Fibers long (obtained from hardwood) allow the formation of a network in which deposit the short fibers (obtained from soft wood) and the assembly contributes to the mechanical resistance of the material formed after drying. Additives and bulking agents are very often used to improve characteristics such as appearance, porosity and surface condition.
  • Beet pulp is a by-product of the sugar beet processing.
  • the beets are grated and the sugar is water extract. This is followed by pressing to increase the dry matter content up to about 25 to 30%.
  • the main components beet pulp is on average cellulose (27%), hemicellulose (29%), pectin (29%), the minor components being sugar (3%) from lignin (3%) and ash (4%). These components form together the cellular structure characteristic of beet pulp. This structure consists of parenchymal cells held together and linked transversely by xylem and tubular phloem.
  • Patent EP-A-0102 829 teaches a method of separation of polymers from plant materials containing parenchymal cells under extreme pH conditions and at high temperature for a short reaction time.
  • the isolated cellulosic material called PCC (Parenchymal Cell Cellulose)
  • PCC Parenchymal Cell Cellulose
  • the process which includes treatment severe chemical followed by steam cracking and a separation / purification is complex and requires treatment of effluents because chemicals used.
  • Patent CS-A-0174 308 describes a method of manufacturing paper for from arabinose extraction residue from beet pulp.
  • Patent EP-A-0139 658 discloses a method of depectinization and dehydration of raw beet pulp.
  • Raw impregnated pulps of acidified water are subjected to an alternating succession of compression stages and decompression.
  • Mechanical work produces a sort of retting of pulp fibers.
  • the fibers separate from each other, their arrangement directional disappears and the pectins are dissolved.
  • the dried end product suitable for papermaking.
  • Patent EP-A-0644 293 discloses a pulp grinding process dried and the use of these crushed pulps as paper filler.
  • the dried pulps are crushed and micronized.
  • the resulting product is tested and used in papermaking on an industrial scale.
  • the characteristics of the paper obtained are comparable with those of paper made using the same process but without the beet pulp.
  • the pulps are dried and the final filler is therefore not commercially competitive compared to other by-products such as sawdust or straw. Since papermaking is a wet process, it does not seem useful to dry the load which must be rewetted afterwards.
  • the grinding of the dried pulps destroys the xylem and the phloem which, without this, could contribute by their fibrous structure to the increase in paper resistance.
  • Patent EP-A-0 504 056 describes a process for bleaching vegetable materials, such as beet pulp, which can be produced dry, to obtain vegetable fibers with a very high degree of whiteness and usable For alimentation.
  • EP-A-0 358 554 relates to wall-rich products vegetable, for example from beet pulp, chemically modified in order to contain a fraction of water-soluble polysaccharides greater than that which exists naturally, without modification of the chemical composition overall of said products.
  • the products thus modified are useful as fibers food.
  • the present invention relates to the use of beet pulps fermented in papermaking. More particularly, this invention relates to a method of preparing a product derived from sugar beet, which can be added to the pulp to decrease the need for raw materials traditionally used in the manufacture of paper.
  • the invention describes paper or cardboard containing beet pulp.
  • Silage is carried out according to known methods with pulps preferably containing 15% to 35% dry matter. Silage is continued until the pH is at least below about 5 and above about 3.5.
  • Lactic acid concentration varies generally 1 to 10% of the dry matter of beet pulp.
  • the pulps are diluted to 1 to 10% of dry matter before moderate mechanical shear.
  • the shearing must be carried out in order to obtain an adequate distribution of the fermented pulp dimensions.
  • the present invention describes a composition of paper or cardboard comprising from 1 to 50% and preferably from 2 to 25% (expressed in materials dry) of fermented beet pulp.
  • Optimal amounts of pulp fermented added depends on the type of paper or cardboard that is manufactured and of their desired characteristics. It is nevertheless preferable to replace the wood fibers or waste paper with at least 10% (dry matter) pulp fermented.
  • the fermented beet pulps are obtained according to the method of the invention.
  • the present invention reveals that the resistance of paper and cardboard, measured by different parameters, is considerably increased by the replacement of a certain quantity of the wood pulp normally used by the fermented beet pulps of the invention.
  • fermented beet pulp whose size distribution is suitable.
  • the diameter of the fraction of fermented beet pulp used for making cardboard is less than 1000 micrometers and preferably between 150 and 250 micrometers.
  • the present invention also makes it possible to reduce the time of drainage by the addition of flocculants.
  • Such flocculants can be chosen from the flocculants used usually for wastewater treatment.
  • the flocculants used in the present invention are preferably cationic polymers with high molecular weight (greater than 1 million).
  • the present invention describes various kinds of paper and containing the fermented beet pulp. These include white paper, recycled paper (brown) and corrugated cardboard.
  • the present invention discloses that after fermentation in these conditions, it's easier to separate the parenchymal cells and get, by moderate wet mechanical shearing, a product suitable for paper making. It is possible to obtain a suspension in this way cut xylem and phloem and separate parenchymal cells which suitable for direct incorporation into the final papermaking process wet.
  • An object of the present invention is to provide a method of treatment of beet pulps such that the treated pulps become both physically and economically suitable for use in the preparation of paper or cardboard.
  • composition of beet pulps fermented sugar in the making of paper or cardboard can be considered in particular as a substitution for short wood fibers.
  • Silage is carried out according to known methods with pulps preferably containing 15 to 35% dry matter. Silage is continued until the pH is at least below 5. The pulps are diluted to a dry matter content of 1 to 10% before mechanical shearing moderate.
  • the fermentation process starts spontaneously under conditions anaerobic with lactic acid bacteria present, without the need to add a ferment. These microorganisms transform the residual sucrose beet pulp pressed into lactic acid, causing a drop in pH and therefore maintaining the structure of the beet pulp. It is possible also to carry out the fermentation by inoculating the beet pulps with specific strains of microorganisms capable of developing well at from polymeric substances such as cellulose, pectin and hemicellulose and which degrade these polymers.
  • the outcome of silage is linked to the microbiological state of the pulps and also depends on conditions such as initial temperature, temperature variations in the silo, the amount of sucrose still present, the oxygen content of the air included, humidity and pH. When the correct conditions are applied, the result is a more flexible material whose acidity is mainly due to acid lactic and whose pH is less than 5.
  • fermented pulps One way to treat fermented pulps is to lower the content dry matter pulp from 15-35% to 1-10% by addition of water or water white from the paper manufacturing circuits. Later, the suspension is subjected to mechanical treatment.
  • Mechanical treatment can be done with different devices and the resulting product is preferably a distribution of its dimensions which makes it ideally suitable for use in the production of paper or cardboard.
  • the treatment can be a shear or grinding.
  • Known beet pulp treatments such as alternating compression and decompression and what's called "the explosion at the steam ”is not necessary.
  • Mechanical treatment can be performed directly during the mechanical pulping of the dough if a pulping step or refining is implemented.
  • the use of fermented beet pulp of the invention therefore does not require significant investment in most existing paper production facilities.
  • Beet pulp has an ivory white color and becomes greyish due to enzymatic phenomena or degradation by heat.
  • the present invention reveals that such bleaching does not not adversely affect the characteristics of beet pulp fermented.
  • the heterogeneous suspension can be bleached with H2O2 or NaClO when a whiter product is desired; in this case the bleach can be added directly during the dilution of the fermented pulps preceding mechanical treatment.
  • the heterogeneous material obtained consisting of separate cells and short xylem and phloem fibers, has been used in a pulp formulation; laboratory formulas have been shaped and their properties evaluated in comparison with a control.
  • the present invention describes a composition of paper or cardboard with fermented beet pulp.
  • Beet pulp are used as an organic ingredient that improves resistance characteristics of the finished product.
  • the amount of beet pulp fermented is 0 to 50% and preferably between 2 and 25% by weight of the materials ingredients of paper or cardboard.
  • the optimal amounts of added fermented beet pulp depends on the type of paper or cardboard manufactured and their desired characteristics. We have shown that the replacement of 15% of waste paper with fermented beet pulp was doable.
  • the fermented beet pulps are preferably prepared according to the method of the invention.
  • the process of the invention does not employ no chemical treatment of fermented beet pulp.
  • the process makes possible the production of paper and cardboard without producing waste additional chemicals.
  • the properties of the final paper sheets differ in one way complex depending on the type of wood pulp tested. In general, there are improvements in opacity, length at break, resistance to tear and "Dennison". At the same time, the drip time and the clues Riegler's shopper are increased for all samples while the porosity Bendtsen is greatly reduced, and finally the gloss is less while a bleaching as described above leads to improvement.
  • the present invention reveals that the strength of paper and cardboard obtained by adding a certain amount of fermented beet pulp is considerably increased. It is better to control the reduction of dimensions of fermented beet pulp before use in the preparation of the dough, so as to avoid excessive increase of time drip of such a paste. It has been shown that the preferred diameter of the pulp of fermented beets is less than 1000 micrometers and more particularly from 150 to 250 micrometers for the preparation of corrugated cardboard.
  • Example 1 teaches that before using beet pulp fermented, it is necessary to check whether the fermentation has been carried out, that is to say if the fermented product has not been degraded. PH and quantity lactic acid formed are possible measures of the state of the pulp of beet. A formulation of the ingredients of the acidic paper type was used to prepare sheets of paper. The composition of the paper has been changed from so that 10% of the fibers have been replaced by beet pulp fermented.
  • Example 2 shows that it is possible to easily adapt the composition of the paper pulp in case it is necessary to set uses fermented beet pulp in a process for manufacturing existing paper.
  • the different means of mechanical processing of the pulp paper do not critically influence the characteristics of the resulting paper.
  • Example 3 we evaluated the use of beet pulp fermented as an additive substitute in the manufacture of corrugated board. Yes 10% dry matter from fermented beet pulp is used with 90% dry matter of a formulation without wood pulp, we obtain cardboard with the desired strength characteristics.
  • Example 5 shows that when the fermented beet pulps are ground and sieved and then mixed with old paper, the time only slightly increased (sample 2) compared to old papers that are subject to traditional pulping (witness), if the diameter of the product is between 150 and 250 micrometers.
  • the resistance properties are influenced by the size of the pulp fermented beets. The sieving of fermented beet pulps leads to resistance properties slightly lower than those of unsifted fermented beets but both are considerably higher than the values measured on the wood pulp.
  • Example 6 shows that high-weight cationic flocculants molecular, usually used for the treatment of waste water are effective as dripping aids.
  • time reduced drainage time corresponds to the drainage time of a composition of paper in which there is no beet pulp.
  • flocculants are very effective despite the dimensions of the pulp of refined beets.
  • a further improvement in drip time can be obtained by adding the flocculants to the sifted beet pulp so to combine the effects of Examples 5 and 6, namely the sieving of the pulp beets and the use of a flocculant.
  • the invention relates to the use of sugar beet pulp. fermented for the preparation of paper or cardboard.
  • step c) The addition of flocculant can be done at the end of step c) defined above, that is to say at the end of the shearing of the fermented pulps.
  • the invention relates to a composition of fermented sugar beet pulps above defined as that obtained by a process comprising the steps defined above, in which ensiling is carried out with sugar beet pulps whose content dry matter is about 15 to about 35%.
  • the invention relates to a composition of fermented sugar beet pulps defined above, in which the size of the beet pulp is less than 250 micrometers, and in particular less than 150 micrometers.
  • the invention relates to paper or cardboard comprising from about 1 to about 50% and preferably about 2 to about 25%, expressed relative to dry matter, of a composition of fermented sugar beet pulps according to the invention.
  • the invention relates to paper or cardboard defined above, characterized in that the beet pulp fermented sugar have a dimension less than 1000 micrometers, and preferably ranging from about 150 to about 250 microns.
  • flocculants can be added to the suspension of fermented beet pulp used for the paper making.
  • These flocculants are chosen from those available on the market, more specifically on the market for treatment products waste water. More specifically, high weight cationic polymers molecules are effective in improving the drainage of the paper preparation.
  • the invention relates to paper or cardboard defined above, characterized in that the beet pulp fermented sugar are blanched.
  • step c) The addition of flocculant can be done at the end of step c) defined above, that is to say at the end of the shearing of the fermented pulps or after step e), that is to say after incorporation of the diluted fermented pulps sheared with traditional materials from pulp or cardboard.
  • the addition of the flocculant is done at the end of step c).
  • the opacity is defined with respect to the DIN 53146 standard
  • gloss is defined in relation to DIN 53145 standard Part II
  • length at break is defined in relation to DIN 53112 Part I
  • internal cohesion is defined in relation to DIN 54516
  • the tear resistance is defined in relation to DIN 53115
  • the Bendtsen porosity is defined in relation to DIN 53120 part I
  • CMT is defined in relation to DIN 53143
  • Dennison is defined in the TAPPI 459om-88 log
  • the drip time and the degree of refinement are defined in the Zellcheming Journal No. V / 7/61.
  • the long fibers come from a wood soft such as pine wood and have a dimension of about 3.5 to 4.8 mm and the short fibers come from hard wood such as birch wood and have as dimension from about 0.7 to about 1.7 mm.
  • the sample was prepared by mixing short and long fibers and beet pulp in the proportions indicated. The degree of refinement has was that shown in Table 3. The characteristics of the papers obtained are determined by standard methods. The sample containing the pulp of reference stock beet, MB, showed a marked improvement in resistance ratings and a slight increase in drip time while porosity was significantly reduced.
  • the fermented beet pulps were processed with an Escher Wiss refiner to check whether the equipment normally used in a paper mill is effective enough to separate the parenchymal cells from the beet pulps without at the same time breaking the cells. The following tests have been carried out:
  • Sample P showed the presence of rather large pieces while the other two samples, PR and MR, had pieces having dimensions comparable to those of the tests with the colloid mill.
  • the samples were evaluated, after the shaping of the formulas, having used for each of them 10% dry matter of fermented beet pulp and 90% of the formulation (*) without wood pulp.
  • the data were compared with 100% of a formulation without wood pulp (control) (*) and with a sample, MB1, containing 10% of material from the reference stock and 90% of the formulation (*) without pulp of wood.
  • the maximum amount of beet pulp possible in the production of corrugated board seems to be 10% because of the high value of resulting drip time. Further improvement of drip characteristics could increase the amount of pulp beets in the dough.
  • Fermented beet pulp, ensiled after the 1993 campaign was mechanically sheared. H2O2 was added during the dilution (4% based on dry matter). The suspension obtained was then used for tests of paper sheets (10% of blanched fermented beet pulps, 90% of the acid paper formulation described in Example 1) and the results are compared with a control (the same as in example 1) as shown below.
  • sample 2 shows that when the fermented beet pulps are ground and sieved and then mixed with the old paper, the time only slightly increased (sample 2) compared to old papers which are subjected to traditional mechanical pulping (witness). Time dripping of sample 2 is in fact comparable with that of the control then that it is more than three times lower than that of sample 1.
  • Example 5 shows that the use of fermented beet pulp screened with dimensions ranging from 150 to 250 micrometers nevertheless leads to a increased drip time, although this increase is much less important than when using unscreened fermented beet pulp.
  • flocculants Another way to reduce the drip time is to use flocculants.
  • High molecular weight cationic flocculants are capable of flocculate the beet pulp suspensions used for the manufacture of paper.
  • Zetag 89® from Allied Colloids
  • Bufloc 5327® and 5328® from Buckman
  • Floerger 4698® from SNF Floerger
  • Nalco Company products The use of flocculated beet pulp for papermaking leads to correct drip times. However, the extent of this improvement depends on several factors such as the shear of the paper suspension during manufacturing, the amount of flocculant and how to use the flocculant.
  • Figure 1 shows that the drip time is a function of the shear time when adding a flocculant. At low shear, the mixture of waste paper and flocculated beet pulp drips better than old paper alone.

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Claims (21)

  1. Verfahren zur Herstellung einer Zusammensetzung aus fermentierter Zuckerrübenpulpe, das die folgenden Schritte aufweist:
    Silieren der Zuckerrübenpulpe bei Bedingungen, die für den Ablauf einer Milchsäurefermentation zweckmäßig sind, um fermentierte Pulpe zu erhalten,
    Unterwerfen der fermentierten Pulpe einer mechanischen Behandlung, die die Abtrennung der Parenchym-Zellen, die in der Pulpe enthalten sind und die Gewinnung einer Pulpe mit einer Dimension unterhalb von etwa 1000 µm ermöglicht.
  2. Verfahren zur Herstellung einer Zusammensetzung aus fermentierter Zuckerrübenpulpe, das die folgenden Schritte aufweist:
    a) Silieren der Zuckerrübenpulpe bei Bedingungen, die für den Ablauf einer Milchsäurefermentation zweckmäßig sind, um fermentierte Pulpe zu erhalten,
    b) Verdünnung der fermentierten Pulpe,
    c) Unterwerfen der verdünnten fermentierten Pulpe einer mechanischen Behandlung, die die Abtrennung der Parenchym-Zellen, die in der Pulpe enthalten sind und die Gewinnung einer Pulpe mit einer Dimension unterhalb von etwa 1000 µm ermöglicht.
  3. Verfahren nach Anspruch 2, wobei man die Zuckerrübenpulpe siliert, bis der pH unterhalb von etwa 5 liegt.
  4. Verfahren nach Anspruch 2, wobei man die Zuckerrübenpulpe siliert, bis der pH über etwa 3,5 liegt.
  5. Verfahren nach einem der Ansprüche 2 bis 4, wobei man die fermentierte Pulpe verdünnt, bis der Gehalt an Trockensubstanzen bei ungefähr 1% bis ungefähr 10% liegt.
  6. Verfahren nach einem der Ansprüche 2 bis 5, wobei die mechanische Behandlung, der die fermentierte verdünnte Pulpe unterworfen wird, eine Scherbehandlung ist.
  7. Verfahren nach einem der Ansprüche 2 bis 6, wobei man einen Schritt d) durchführt, der in einer gleichzeitig zum Schritt b) durchgeführten Bleichbehandlung der am Ende des Schrittes a) erhaltenen fermentierten Pulpe besteht.
  8. Verfahren nach einem der Ansprüche 2 bis 6, wobei man einen Schritt d) durchführt, der in einer Bleichbehandlung der am Ende des Schritts c) erhaltenen fermentierten Pulpe besteht.
  9. Verfahren nach einem der Ansprüche 2 bis 8, wobei das Silieren mit der Zuckerrübenpulpe durchgeführt wird, deren Gehalt an Trockensubstanzen ungefähr 15% bis ungefähr 35% beträgt.
  10. Zusammensetzung aus fermentierter Zuckerrübenpulpe, die am Ende des Verfahrens nach einem der Ansprüche 1 bis 9 erhalten wird.
  11. Zusammensetzung nach Anspruch 10, wobei die Dimension der Rübenpulpe unterhalb von 250 µm liegt.
  12. Zusammensetzung nach Anspruch 10, wobei die Dimension der erhaltenen Rübenpulpe unterhalb von 150 µm liegt.
  13. Verwendung einer Zusammensetzung nach einem der Ansprüche 10 bis 12 für die Herstellung von Papier oder Karton.
  14. Papier oder Karton, das/der ungefähr 1% bis ungefähr 50%, ausgedrückt als Trockensubstanz, einer Zusammensetzung aus fermentierter Zuckerrübenpulpe nach einem der Ansprüche 10 bis 12 aufweist.
  15. Papier oder Karton nach Anspruch 14, das/der ungefähr 2% bis ungefähr 25%, ausgedrückt als Trockensubstanz, einer Zusammensetzung aus fermentierter Zuckerrübenpulpe nach einem der Ansprüche 10 bis 12 aufweist.
  16. Papier oder Karton nach einem der Ansprüche 14 oder 15, dadurch gekennzeichnet, dass die fermentierte Zuckerrübenpulpe gebleicht ist.
  17. Verfahren zur Herstellung von Papier oder Karton nach einem der Ansprüche 14 bis 16, dadurch gekennzeichnet, dass man Zusammensetzungen aus fermentierter Zuckerrübenpulpe gemäß den Schritten a), b), c) und d), wie sie in den Ansprüchen 2 bis 9 beschrieben sind, herstellt,
       man einem Schritt e) durchführt, der in der Einmischung von ungefähr 1 bis ungefähr 50%, ausgedrückt als Trockensubstanz, der am Ende des Schritts c) oder d) erhaltenen Zusammensetzung zu herkömmlichen Ausgangsstoffen der Papier masse oder Karton besteht.
  18. Verfahren nach Anspruch 17, wobei man ungefähr 2% bis ungefähr 25%, ausgedrückt als Trockenmasse der am Ende des Schritts c) oder d) erhaltenen Zusammensetzung in herkömmliche Ausgangsstoffe der Papiermasse oder Karton einmischt.
  19. Verfahren nach Anspruch 17 oder 18, wobei man ein Flockungsmittel am Ende des Schritts c) oder des Schritts e) hinzufügt.
  20. Verfahren zur Herstellung von Papier oder Karton nach einem der Ansprüche 14 bis 16, dadurch gekennzeichnet, dass man
    a) die Zuckerrübenpulpe bei Bedingungen siliert, die für den Ablauf einer Milchsäurefermentation zweckmäßig sind und insbesondere bis der pH unterhalb von etwa 5 und vorteilhafterweise oberhalb von etwa 3,5 liegt, um fermentierte Pulpe zu erhalten,
    b) die fermentierte Pulpe verdünnt, insbesondere bis der Gehalt an Trockensubstanzen ungefähr 1% bis ungefähr 10% beträgt,
    c) ungefähr 1% bis ungefähr 50% und vorzugsweise ungefähr 2% bis ungefähr 25%, ausgedrückt als Trockensubstanz, der am Ende des Schritts b) erhaltenen Zusammensetzung in herkömmliche Ausgangsstoffe der Papiermasse oder Karton einmischt,
    d) ggfs.
    die am Ende des Schritts a) erhaltene fermentierte Pulpe einer gleichzeitig mit dem Schritt b) verlaufenden Bleichbehandlung unterwirft, oder
    die am Ende des Schritts c) erhaltene
    Zusammensetzung einer Bleichbehandlung unterwirft,
    e) die am Ende des Schritts c) oder d) erhaltene Zusammensetzung eindickt oder raffiniert, kombiniert mit einer mechanischen Behandlung, insbesondere einer Scherbehandlung, die die Abtrennung der Parenchym-Zellen, die in der fermentierten Rübenpulpe enthalten sind und die Gewinnung einer Pulpe mit einer Dimension unterhalb von etwa 1000 µm ermöglicht.
  21. Verfahren nach Anspruch 20, wobei man am Ende des Schritts c) oder des Schritts e) ein Flockungsmittel hinzufügt.
EP97904489A 1996-02-13 1997-02-05 Verwendung von zuckerrübenpulpe in der papier- oder pappeherstellung Expired - Lifetime EP0880616B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9601724 1996-02-13
FR9601724A FR2744735B1 (fr) 1996-02-13 1996-02-13 Utilisation de pulpes de betterave a sucre dans la fabrication de papier ou de carton
PCT/FR1997/000224 WO1997030215A1 (fr) 1996-02-13 1997-02-05 Utilisation de pulpes de betterave a sucre dans la fabrication de papier ou de carton

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EP0880616A1 EP0880616A1 (de) 1998-12-02
EP0880616B1 true EP0880616B1 (de) 2000-07-12

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US (1) US6074856A (de)
EP (1) EP0880616B1 (de)
AT (1) ATE194671T1 (de)
AU (1) AU1728097A (de)
CA (1) CA2243294A1 (de)
CZ (1) CZ293999B6 (de)
DE (1) DE69702499T2 (de)
DK (1) DK0880616T3 (de)
FR (1) FR2744735B1 (de)
HU (1) HUP9901632A3 (de)
NO (1) NO983695L (de)
PL (1) PL190453B1 (de)
WO (1) WO1997030215A1 (de)

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FI104500B (fi) 1997-08-26 2000-02-15 Cultor Oyj Menetelmä L-arabinoosin valmistamiseksi sokerijuurikasleikkeestä
FI105691B (fi) 1997-08-26 2000-09-29 Sohkar Oy Pektiinin ja sen sukulaisyhdisteiden valmistuksessa käyttökelpoinen raaka-aine ja menetelmä sen valmistamiseksi
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HUP9901632A2 (hu) 1999-08-30
FR2744735A1 (fr) 1997-08-14
EP0880616A1 (de) 1998-12-02
FR2744735B1 (fr) 1998-04-10
CZ293999B6 (cs) 2004-09-15
DK0880616T3 (da) 2000-11-06
ATE194671T1 (de) 2000-07-15
AU1728097A (en) 1997-09-02
DE69702499T2 (de) 2001-04-19
NO983695D0 (no) 1998-08-12
CA2243294A1 (fr) 1997-08-21
DE69702499D1 (de) 2000-08-17
PL328303A1 (en) 1999-01-18
WO1997030215A1 (fr) 1997-08-21
HUP9901632A3 (en) 2001-01-29
PL190453B1 (pl) 2005-12-30
CZ246698A3 (cs) 1999-01-13
NO983695L (no) 1998-08-12
US6074856A (en) 2000-06-13

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