EP3399100B1 - Method for producing cellulose pulp, cellulose pulp and use thereof, paper - Google Patents

Method for producing cellulose pulp, cellulose pulp and use thereof, paper Download PDF

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Publication number
EP3399100B1
EP3399100B1 EP16880207.2A EP16880207A EP3399100B1 EP 3399100 B1 EP3399100 B1 EP 3399100B1 EP 16880207 A EP16880207 A EP 16880207A EP 3399100 B1 EP3399100 B1 EP 3399100B1
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EP
European Patent Office
Prior art keywords
pulp
enzyme
cellulose
carbohydrate
cellulose pulp
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Active
Application number
EP16880207.2A
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German (de)
English (en)
French (fr)
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EP3399100C0 (en
EP3399100A1 (en
EP3399100A4 (en
Inventor
Otávio MAMBRIM FILHO
Leonardo ALVES DE MELO
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Fibria Celulose SA
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Fibria Celulose SA
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Publication date
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Priority claimed from PCT/BR2016/050355 external-priority patent/WO2017112995A1/pt
Publication of EP3399100A1 publication Critical patent/EP3399100A1/en
Publication of EP3399100A4 publication Critical patent/EP3399100A4/en
Application granted granted Critical
Publication of EP3399100C0 publication Critical patent/EP3399100C0/en
Publication of EP3399100B1 publication Critical patent/EP3399100B1/en
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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
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/02—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate processes
    • 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
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/22—Other features of pulping processes
    • 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
    • D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
    • D21C5/005—Treatment of cellulose-containing material with microorganisms or enzymes
    • 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
    • D21C9/10—Bleaching ; Apparatus therefor
    • 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
    • D21H21/06—Paper forming aids
    • D21H21/10—Retention agents or drainage improvers
    • 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
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/002—Tissue paper; Absorbent paper
    • 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
    • D21H21/14—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 characterised by function or properties in or on the paper
    • D21H21/18—Reinforcing agents

Definitions

  • the present invention relates to an improved process for the production of cellulose pulps with increased quality and applicability of said pulps, especially their physical resistance properties and degree of resistance to drainage, through an enzymatic treatment step comprised in the production process of said cellulose pulp, concomitantly with the polymer dosage based on carbohydrates.
  • Document WO2003/021033 describes a process for producing tissue paper in a machine, where the paper product contains cellulose fibers.
  • An enzymatic treatment is carried out on the cellulose fibers in order to increase the number of reactive aldehyde groups on the surface of said fibers.
  • the treatment disclosed in said document consists of mixing an aqueous suspension of cellulose fibers with one or more hydrolytic enzymes, optionally in the presence of surfactants, other non-cellulase/hemicellulase enzymes or non-hydrolytic chemical reagents wherein the aldehyde groups are formed in the the surface of the fibers or in their proximity.
  • hydrolytic enzymes in particular cellulases, is responsible for the degradation of the fibrous cell wall, impairing the tensile properties of the paper.
  • Gonzales et al. (2013) describes a process of pulp enzymatic treatment combined with the addition of nanofibrillated celluloses (NFC) which results in the improvement of the physical and mechanical properties of a pulp suspension used in papermaking.
  • NFC nanofibrillated celluloses
  • Pommier et al. (1989) describes the enzymatic action on cellulose pulp as a "peeling effect" and suggests that the enzymes defibrillate the cellulose fibers by removing molecules with high affinity for water, but with a small contribution to the overall hydrogen bonding potential of the fibers. This reduction in pulp-water interactions allows a greater drainage of the pulp. However, it leads to a reduction in the strength and length of the fiber, in addition to an excessive production of fines. As a consequence, paper strength is dramatically affected.
  • Document WO00/68500 is related to a process for producing paper materials such as paper, liberboard or corrugated linerboard with improved wet strength.
  • Document WO03/048449 refers to methods of presence of the bleaching pulp that combine xylanase enzymes with hydrogen peroxide, peracids, or a combination thereof, wherein the hydrogen peroxide and peracids do not destroy the activity of the xylanase.
  • Document WO94/20672 is related to a method for the bleaching of hardwood and softwood pulp without chlorine or chlorine derivatives that provides a pulp with high brightness, good physical strength and a low degree of brightness reversion.
  • Document WO2013/090272 refers to methods for reducing the effects of wetlapping, drying, and hornification of pulp fibers and, consequently, increasing the pulp drainage and strength properties in the final pulp or paper product.
  • the present invention aims to provide cellulose pulps with improved surface properties, these properties being also observed on paper produced from said cellulose pulp.
  • a first embodiment of the present invention relates to a process for producing cellulose pulp from cellulosic feedstock by dosing enzymes at certain concentrations and process step.
  • the present invention relates to a process for the production of cellulose pulp with increased quality and applicability of said pulps, especially their physical resistance properties, at least the maintenance of their degree of resistance to drainage, through an enzymatic treatment step, concomitantly with the dosage of a carbohydrate-based polymer comprised in the production process of said cellulose pulp.
  • the carbohydrate-based polymer may be selected from the group consisting of: starch, carboxymethylcellulose, guar gum, among others.
  • the enzymatic treatment comprises the use of enzyme or mixture of hydrolytic enzymes (EZ), known to one skilled in the art and commercially available, and which may be selected from the group consisting of: ⁇ -amilase,2 ⁇ -amilase, glucan 1,4- ⁇ -glucosidase, cellulase, endo-1,3(4)- ⁇ -glucanase, inulinase, endo-1,4- ⁇ -xylanase, oligo-1,6-glucosidase, dextranase, chitinase, polygalacturonase, lisozime, exo- ⁇ -sialidase, ⁇ -glucosidase, ⁇ -glucosidase.
  • EZ hydrolytic enzymes
  • ⁇ -galactosidase ⁇ -galactosidase, ⁇ -galactosidase, ⁇ -mannosidase, ⁇ -mannosidase, ⁇ -fructofuranosidase, ⁇ , ⁇ -trehalase, ⁇ -glucuronidase, endo-1,3- ⁇ -xilanase, amilo-1,6-glucosidase, hialuronoglucosaminidase, hialuronoglucuronidase, xilan 1,4- ⁇ -xilosidase, ⁇ -D-fucosidase, glucan endo-1,3- ⁇ -D-glucosidase, ⁇ -L-rhamnosidase, pululanase, GDP-glucosidase, ⁇ -L-rhamnosidase, fucoidanase, glucosilceramidase, galactosilceramidase, galact
  • the performance of the enzyme or enzyme mixture (EZ) available in the market occurs in the surface area of the cellulose fiber, potentiating the adsorption capacity of the fiber modifying chemicals during the pulp production process.
  • the inventors have found increased physical strength and, surprisingly, at least the maintenance of the degree of drainability of the cellulose pulp obtained by the process described herein, by defining specific enzyme levels to be dosed together with the carbohydrate-based polymer, in the step after bleaching of the pulp and before drying of said pulp.
  • Figure 1 shows the steps of the process of the present invention.
  • the process for producing the cellulose pulp comprises the steps of:
  • Figure 2 shows that the dosage of 50, 100 or 200 g/ton of enzyme causes an increase in the fiber surface area when compared with a reference sample.
  • the reference sample is a white slurry pulp that has not been doped, that is, it did not receive a dosage of the carbohydrate-based polymer and enzyme or mixture of enzymes.
  • Figure 3 shows the increased reactivity of the fiber produced by the process of the present invention.
  • the reactivity is represented by the zeta potential.
  • Figures 4 and 5 demonstrate the physical strength gains of the pulp obtained by the process described in the present invention when compared to the reference pulp. Furthermore, Figure 6 proves the maintenance of the degree of resistance to drainage of the pulp of the present invention in comparison with the reference pulp.
  • the paper obtained from the pulp of the present invention reproduces these gains in physical resistance as shown in Figure 7 .
  • the cellulose pulp production process comprises the steps of:
  • the cellulose pulp production process can be described as:
  • the chemical pulping process comprises treating the fibers of vegetable origin, including the following steps:
  • the step (b) of bleaching a brown cellulose pulp (BC) from the pulping process of the cellulose pulp of the present invention may be selected from the group consisting of:
  • the carbohydrate-based polymer and commercial enzyme or enzyme mixture are dosed, which are then conveyed to and through a homogenization device, which ensures the greatest contact between the products dosed and the fiber. Then, this mixture is transferred to a mixing pump where effective mixing of the additives takes places. Thereafter, the carbohydrate-based polymer-doped pulp and commercial enzyme or enzyme mixture is pumped into a reaction tower, where the mixture remains for 10 to 300 minutes, preferably for 30 to 120 minutes, at a temperature between 40 and 90°C, preferably between 50 and 80°C, and pH ranging from 3.0 to 9.0, preferably ranging from 3.5 to 8.0, using sodium hydroxide or sulfuric acid for pH adjustment, in order to complete the reaction.
  • the obtained pulp is then diluted and pumped into the drying step. Then, the cellulose pulp (CL) is obtained for the paper market.
  • the enzymatic treatment is carried out by the action of hydrolytic enzymes, for example, cellulases, or mixture of cellulases with other enzymes available on the market with fillers ranging from 20 to 100 grams of enzyme per ton of cellulose.
  • hydrolytic enzymes for example, cellulases, or mixture of cellulases with other enzymes available on the market with fillers ranging from 20 to 100 grams of enzyme per ton of cellulose.
  • Said enzymatic treatment (E) is conducted in a step subsequent to the bleaching process of the pulp obtained by the chemical pulping process, and prior to the drying step (D) of the pulp so that it is then used in papermaking.
  • the enzymatic treatment has a retention time in the range of 30 to 120 minutes, a pH in the range of 3.5 to 8.0, a temperature in the range of 50 to 80°C, preferably when the hydrolytic enzyme is a cellulase.
  • the fibers used in the process of the present invention may be so-called vegetable fibers, preferably short fibers, more preferably eucalyptus fibers.
  • the cellulose pulp of the present invention obtained by a process including an enzymatic treatment step, concurrently dosing a carbohydrate-based polymer, surprisingly presents an increased surface area of the cellulose fiber without compromising the physical properties of the treated fiber, and also ensuring that the obtained cellulose pulp exhibits greater physical resistance - to traction and tear - and at least maintain its degree of resistance to drainage.
  • the carbohydrate-based polymer but specifically starch, was used in a dosage of 3 to 10 kg/ton of cellulose pulp from short fibers. Thereafter, 30 to 50 g of EZ per ton of cellulose were added, wherein the reaction conditions are as follows: temperature from 50 to 90°C, pH 3.0 to 8.0, over a period from 60 to 240 minutes.
  • the used bleaching sequence was an ECF sequence.
  • EXAMPLE 2 POLYMER PRODUCTION PROCESS - ADDITION OF ENZYME FOLLOWED BY POLYMER ADDITION
  • EXAMPLE 3 DESCRIPTION OF THE COMPARATIVE TESTS WITH THE REFERENCES.
  • Comparative tests for evaluating the characteristics of the cellulose pulp obtained from the process of the present invention were carried out with the concomitant addition of carbohydrate-based polymer and commercially available enzyme or enzyme mixture.
  • the equipment used was a cellulose bleach reactor with a capacity of 300 g of dry fibers and total automatic control of the process conditions, which were adjusted to: temperature of 50°C, pH of 7.0 and reaction time of 120 minutes.
  • the amount of enzyme or enzyme mixture used ranged from 0 (Reference) to 50 to 200 g/tsa (Samples A, B, C and D).
  • the comparative tests were followed by tests on larger scale, when the reactor having a dry pulp capacity of 100 kg and having automatic control of the process variables was used.
  • the variables were maintained: temperature of 50°C, pH of 7.0 and reaction time of 120 minutes.
  • the amount of enzyme or enzyme mixture used was 50 g/t.
  • the preparation of the slurry was carried out in batch, where 4.2 tons of slurry were prepared.
  • the slurry was sent for testing in a commercially-available tissue paper machine, as shown in Figure 8 .

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  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Biochemistry (AREA)
  • Microbiology (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Inorganic Chemistry (AREA)
  • Paper (AREA)
EP16880207.2A 2015-12-29 2016-12-27 Method for producing cellulose pulp, cellulose pulp and use thereof, paper Active EP3399100B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BR102015329113 2015-12-29
PCT/BR2016/050355 WO2017112995A1 (pt) 2015-12-29 2016-12-27 Processo para produção de polpa de celulose, polpa de celulose e seu uso, papel

Publications (4)

Publication Number Publication Date
EP3399100A1 EP3399100A1 (en) 2018-11-07
EP3399100A4 EP3399100A4 (en) 2019-08-14
EP3399100C0 EP3399100C0 (en) 2025-03-26
EP3399100B1 true EP3399100B1 (en) 2025-03-26

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EP16880207.2A Active EP3399100B1 (en) 2015-12-29 2016-12-27 Method for producing cellulose pulp, cellulose pulp and use thereof, paper

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EP (1) EP3399100B1 (pl)
ES (1) ES3027193T3 (pl)
PL (1) PL3399100T3 (pl)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4259879A4 (en) * 2020-12-14 2024-10-09 Buckman Laboratories International, Inc. System and method of dynamic corrective enzyme selection and formulation for pulp and paper production

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2115881C (en) * 1993-02-25 2000-05-23 Michael G. Paice Non-chlorine bleaching of kraft pulp
CA2150810A1 (en) * 1993-03-12 1994-09-15 Karl-Erik L. Eriksson Process for bleaching pulp
JPH1046495A (ja) * 1996-07-24 1998-02-17 Oji Paper Co Ltd 印刷用塗被紙及びその製造方法
US6066233A (en) * 1996-08-16 2000-05-23 International Paper Company Method of improving pulp freeness using cellulase and pectinase enzymes
US6179962B1 (en) * 1997-12-31 2001-01-30 Hercules Incorporated Paper having improved strength characteristics and process for making same
WO2000068500A1 (en) * 1999-05-06 2000-11-16 Novozymes A/S A process for production of paper materials with improved wet strength
CN1293261C (zh) * 2001-12-03 2007-01-03 埃欧金生物制品公司 利用木聚糖酶和过氧化氢、过酸或其组合物的漂白段
BRPI0605651B1 (pt) * 2006-11-09 2018-04-03 Fibria Celulose S.A. Processo para tratamento de polpa celulósica utilizando carboximetilcelulose e polpa assim obtida

Also Published As

Publication number Publication date
EP3399100C0 (en) 2025-03-26
EP3399100A1 (en) 2018-11-07
PL3399100T3 (pl) 2025-12-22
EP3399100A4 (en) 2019-08-14
ES3027193T3 (en) 2025-06-13

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