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WO2020245071A1 - Pâte d'écorce d'eucalyptus globulus pour des produits en papier - Google Patents

Pâte d'écorce d'eucalyptus globulus pour des produits en papier Download PDF

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Publication number
WO2020245071A1
WO2020245071A1 PCT/EP2020/065123 EP2020065123W WO2020245071A1 WO 2020245071 A1 WO2020245071 A1 WO 2020245071A1 EP 2020065123 W EP2020065123 W EP 2020065123W WO 2020245071 A1 WO2020245071 A1 WO 2020245071A1
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WO
WIPO (PCT)
Prior art keywords
pulp
bark
less
paper sheets
tissue
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.)
Ceased
Application number
PCT/EP2020/065123
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English (en)
Inventor
Paula CRISTINA DE OLIVEIRA RODRIGUES PINTO
Ana MARGARIDA MARTINS SALGUEIRO CARTA
Margarida FERREIRA BASTOS
Pedro MIGUEL SENA DA COSTA BRANCO
Ricardo JORGE DE OLIVEIRA
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Raiz - Instituto De Investigação Da Floresta E Papel
Original Assignee
Raiz - Instituto De Investigação Da Floresta E Papel
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 Raiz - Instituto De Investigação Da Floresta E Papel filed Critical Raiz - Instituto De Investigação Da Floresta E Papel
Publication of WO2020245071A1 publication Critical patent/WO2020245071A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
    • 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
    • D21B1/02—Pretreatment of the raw materials by chemical or physical means
    • D21B1/021—Pretreatment of the raw materials by chemical or physical means by chemical means
    • 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
    • D21C3/20—Pulping cellulose-containing materials with organic solvents or in solvent environment
    • 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
    • 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
    • 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

Definitions

  • the present invention relates to a pulp of Eucalyptus globulus bark and its production process. Additionally the present invention further relates to the use of the Eucalyptus globulus bark pulp for the production of tissue products, tissue paper sheets incorporating the Eucalyptus globulus bark pulp, and their use for the production of household and sanitary products.
  • the industrial process of pulp production can generally be described as involving the processes of preparation of the raw material and cooking, the later which can be chemical or mechanical.
  • Wood is the main source of raw material for cellulose pulp production.
  • One of the steps in the preparation of the raw material is the stripping of the wood logs to remove the bark.
  • Industrial pulp and paper producers remove bark from the raw material because it is low in fiber, has a high extractable content, is dark and usually incorporates large amounts of debris such as sand.
  • the resulting bark is used for energy production at biomass boilers usually present at pulp and paper mills .
  • the pulp produced through wood cooking is then converted into different products such as printing and writing papers, packaging boards and tissue papers.
  • the document CN102011334B describes a cooking method using Eucalyptus bark.
  • the Eucalyptus bark is subjected to grinding, to an alkaline treatment and milling of the resulting pulp.
  • the pulp is also described as being used for the preparation of corrugated paper.
  • the method described is intended to be an alternative for reducing the environmental impact of the pulp and paper production process. No paper properties of the corrugated paper produced are detailed.
  • the document CN109082929A discloses a method of using Eucalyptus bark for the preparation of pulp for paper production, characterized by a crushing step of the bark, followed by immersing it in an alkaline liquid for 30-48 hours, and mixing the resulting pulp with water and carrying out a final grinding.
  • the method is described as simple, inexpensive and environmentally friendly. Additionally it is described in said document that the pulp produced is suitable for the production of corrugated paper. No paper properties of the corrugated paper produced are detailed.
  • Tissue papers are those used for hygienic and sanitary purposes, both at home and in public places.
  • a tissue paper product such as toilet paper, napkins, kitchen rolls or tissues, is characterized by key properties such as strength, absorption, softness and even visual appearance .
  • EP0478045A1 describes a soft tissue paper having a suitable tensile strength, obtained by incorporating into its constitution cellulose pulps obtained by different chemical and mechanical methods, and which have different types of wood as their raw material. Adopting this solution to improve the mentioned paper characteristics will lead to changes on an existing industrial production process of paper products. Additional costs are easily associated with these significant changes to an industrial process.
  • tissue paper products Another possibility commonly adopted for tissue paper products to improve their characteristics would be the use of chemical additives, as explained in EP0347154A2, which describes a product incorporating starch and polysiloxane to achieve an acceptable balance between softness and tensile strength of tissue paper products.
  • EP0981668A1 describes a tissue paper product wherein at least one inner surface of the paper contains a resistance enhancing polymeric agent.
  • US5316623A provides a method for obtaining a tissue paper product having good absorption capacity and strength, which consists on the use of a combination of alkaline or neutral resins, water soluble anionic polymers and tertiary amines.
  • tissue paper products with a wide range of improved paper properties which are valued by the consumers, such as strength, absorption and even visual appearance, which can be associated with the ideas of sustainability and environmental concern, produced through alternative raw materials, which do not involve complex sources and mixtures of materials, which can be used in existing industrial processes and without significant changes, allowing reducing the waste streams of industrial processes, fulfilling possible deficiencies in the amount of raw material available for pulp and paper production, and which make possible to reduce, in number and quantity, the use of chemical additives for enhancing the characteristics of tissue papers.
  • Such a problem is solved by the invention described herein. Summary of the Invention
  • the Eucalyptus globulus bark pulp disclosed in this invention unexpectedly allows the production of tissue products with a globally improved consumer-friendly pulp properties, such as strength, absorption and even visual appearance associated with sustainability ideas and environmental concerns. Additionally, it is advantageously produced through alternative raw materials, not involving complex sources and mixtures of raw materials, in existing industrial processes and without significant modifications, with a reduction of the waste streams associated with industrial processes, filling possible deficiencies in the amount of raw material available for pulp and paper production, and making it possible to reduce, in number and quantity, the use of chemical additives for enhancing the characteristics of tissue papers.
  • the invention here disclosed describes a cellulose pulp for the production of tissue products comprising Eucalyptus globulus bark fibers.
  • the Eucalyptus globulus bark pulp is comprised of fibers having a length of not less than 0.8 mm, a width of not less than 20 mpi and a coarseness value of not less than 8 mg/lOOm.
  • the Eucalyptus globulus bark pulp presents a viscosity of not less than 1100 mL/g and a carboxyl content of not less than 9%.
  • the Eucalyptus globulus bark pulp is produced by a method involving the steps of bark chip selection, bark pre-extraction with an ethanol : water mixture, and cooking of the chips with NaOH and Na2S for a time of not less than 200 minutes and at a temperature from 17 to 170 °C.
  • the disclosed invention further includes sheets of tissue paper incorporating the Eucalyptus globulus bark pulp, and short and long cellulose fiber pulps.
  • the sheets have improved paper properties compared to tissue sheets that incorporate only Eucalyptus globulus wood pulp in their composition.
  • the described Eucalyptus globulus bark pulp can be used in different forms, such as in the form of dried pulp bales and in the form of a slush, the later feed to the industrial process through pipeline systems.
  • the tissue paper sheets have bulk values greater than 1 cm 3 /g, more preferably from 2 to 7 cm 3 /g and a tensile index greater than 4 kN.m/kg, preferably from 10 to 30 kN.m /kg.
  • the tissue paper sheets disclosed in this document have a tear index greater than 3 mN.m 2 /g, preferably greater than 8 mN.m 2 /g, a burst index of not less than 1 kPa.m 2 /g, a capillarity greater than 60 mm/lOmin, preferably greater than 70 mm/lOmin and an opacity greater than 75%, preferably greater than 90%.
  • the invention disclosed herein thus includes the use of the Eucalyptus globulus bark pulp for the production of tissue products and the use of tissue papers sheets, incorporating the Eucalyptus globulus bark pulp, for the production of household and sanitary products, such as toilet paper, napkins, kitchen paper rolls and tissues .
  • Eucalyptus globulus bark cooking was performed in a time and temperature controlled rotary digester. To carry out the cooking, a batch of bark chips with the most uniform size as possible was selected. Prior to each run, the bark was pre-extracted with an ethanol : water mixture (52:48) .
  • composition of the cooking liquor prepared by dissolving previously calculated amounts of NaOH and Na2S, was confirmed according to the standard SCAN-N 2- 88, also known as the ABC Test.
  • This test is performed by three successive titrations with a hydrochloric acid solution to obtain real concentrations of the cooking liquor.
  • the cooking conditions are shown in Table 1.
  • the cooking results are shown in Table 2.
  • the biometric analysis of the fibers was performed in a Fiber Tester equipment (Lorentzen & Wettre) , which is an instrument for advanced fiber analysis.
  • the equipment measures, by 2D image analysis, a wide variety of properties such as length, width, fines content, coarseness, among others. Coarseness is defined as the weight per unit length of fiber expressed in milligrams per 100 meters. For that, 1 g (dry basis) of pulp was dispersed in 1 L of distilled water. Subsequently, all the suspensions were positioned for analysis by the equipment using available software. For each pulp three measurements were made, the final value of each parameter resulting from the arithmetic mean of the values obtained at the three measurements. 3. Chemical characterization a. Extractable compounds content
  • Extractable compounds are hydrophobic (lipophilic) components present in wood and extracted by organic solvents .
  • the extractable compounds content was determined using ethanol/toluene in quantities enough for samples analysis preparation, as it requires a pulp pre- extraction.
  • the extraction was carried out during approximately 4 hours (24 extraction cycles) of 2 g (dry basis) of pulp in a 100 mL capacity Soxhlet extraction apparatus, using 250 mL of a 1:2 (v/v) ethanol/toluene solution.
  • the insoluble residue was filtered and washed with hot absolute ethanol, for removing any remaining toluene, and dried at room temperature, contrary to what is indicated at the standard TAPPI T 204 om-88, since washing with water, as described, could lead to the loss of pentosans and other polysaccharides of low molecular weight.
  • the obtained extract was dried at a rotary evaporator equipment and the extractable content was determined gravimetrically .
  • Pentosans content was determined gravimetrically.
  • Pentosans content was determined according to the Tappi Test Method T 223 cm-10. This method is based on the action of hydrochloric acid on the pulp hemicelluloses, hydrolyzing them and, consequently, converting the xylose and other pentoses to furfural, which is collected with the distillate and, reacting with orcinol, forms a colored complex making therefore possible the content quantification by spectrophotometry .
  • carboxyl content The content of carboxyl groups was determined according to the TAPPI T 237 om-93 standard method. About 2.5 ⁇ 0.1 g of disintegrated pulp was first weighed and 250 mL of a diluted hydrochloric acid solution (approximately 0.1 M) was added during 12 hours, ensuring that all existing carboxylic groups are in their protonated form. Subsequently, the pulp was filtered and washed with distilled water until the pH of the filtrate equaled the pH of the distilled water.
  • the content of carboxyl groups was determined with the following equation: where a is the volume, in mL, of hydrochloric acid (0,01 M) spent during titration, b is the volume, in mL, of hydrochloric acid (0,01 M) consumed during the blank titration, C w is the mass, in g, of the water in the pulp after filtration, and w is the weight, in g, of the dry pulp. d. Pulp viscosity
  • the viscosity was determined according to the SCAN-test standards SCAN-CM 15:88, which consists on the determination of the viscosity of cellulose pulps by solubilization in a dilute copper-ethylenediamine (CED) solution .
  • SCAN-CM 15:88 which consists on the determination of the viscosity of cellulose pulps by solubilization in a dilute copper-ethylenediamine (CED) solution .
  • the pulp sample was reduced to small fragments in the amount indicated at the table provided by the method (Table 7, Annex C.l.) - 150 mg of pulp were weighed. Each sample was placed into a glass vial along with 25 mL of distilled water and some copper wires. The vials were then placed on a shaker for as long as necessary to ensure that the pulp was completely disintegrated. The procedure continued with adding 25 mL of 1 M CED solution, expelling all existing air and stirring until the sample is completely dissolved. Finally, the temperature of the viscometer bath and the sample's were adjusted to 25.0 ⁇ 0.1 °C and, with the aid of a syringe, a portion of the solution was aspirated and allowed to flow unobstructed. The time it takes to travel the distance between the two viscometer marks was measured to within ⁇ 0.2 s. At least 5 readings were taken for each sample.
  • Vrel— h X t n where h represents the viscometer constant, obtained from the equipment calibration. From the table provided by the aforementioned standard, it is possible to read the value resulting from multiplying the viscosity value with the pulp concentration, ⁇ h]C.
  • Biometric and chemical measurements and comparisons were carried out for a pulp produced with Eucalyptus globulus wood (SF) , characterized by containing short fibers, and for a pulp containing long cellulose fibers (LF) , in addition to for the pulp produced with Eucalyptus globulus bark (BP) by the process described above .
  • SF Eucalyptus globulus wood
  • LF pulp containing long cellulose fibers
  • BP Eucalyptus globulus bark
  • Tissue paper sheets with a weight of 20 g/m 2 were prepared following an adaptation of the standard method ISO 5269-1:2005. Additionally, 60 g/m 2 tissue paper sheets were prepared according to the same ISO.
  • Reference formulations consist on formulations used for the production of tissue paper sheets. The other formulations were based on the replacement of short fibers content by bark pulp (BPl and BP2) .
  • the softness was analyzed on an Emtec TSA - Tissue Softness Analyzer. This device combines data from the three parameters that have the greatest influence on the human feel to the touch: fibers softness, smoothness, and sheet stiffness.
  • the calculation method used by the device is an algorithm that calculates the hand feel (HF) .
  • the water absorption of the tissue papers was determined according to the standard ISO 12625-8:2010, by the immersion absorption method. Approximately 2 g of paper was placed in a basket of certain dimensions, contrary to what is mentioned at the standard, which indicates the use of 5 g of paper.
  • the Scott Test is related to the internal fibers bonding strength of the paper when subjected to delamination. It allows the determination of the energy (or force) required to delaminate a sheet of paper in the z-direction.
  • TAPPI T 569 standard the paper sheet is delaminated under the action of a pendulum of controlled mass and velocity.
  • the internal strength of the fibers is affected by the paper sheets formation (bonding between layers) and also by the process of pulp refining.
  • Gurley's air resistance is a structural property that quantifies the time required for a certain volume of air (100 mL) to pass through a given area of paper under constant pressure, ISO 5636-5:2013 standard. It is an indirect measure of the porosity of the fibrous matrix .
  • BP revealed a considerably higher value than the SF ' s (homologous), meaning the degree of cellulose polymerization was preserved .
  • the pentosans content (measured by the xylan content, the majority of hemicelluloses in short fiber pulps) is within the typical range and considered as favorable.
  • the tensile index increased with the incorporation of bark pulp.
  • the incorporation of BP fibers resulted in increased capillarity, especially when compared to REF 1.
  • the opacity of the fibrous structures also increases with the incorporation of BP.

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  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)

Abstract

La présente invention concerne une pâte d'écorce d'Eucalyptus globulus pour la production de papiers minces ayant des propriétés de pâte améliorées. La présente invention concerne en outre le procédé de production de la pâte d'écorce d'Eucalyptus globulus,mettant en jeu la sélection de copeaux d'écorce, la pré-extraction d'écorce et la cuisson de copeaux avec du NaOH et du Na2S pendant une durée non inférieure à 200 minutes et à une température maximale de 170 °C. La présente invention concerne également l'utilisation de feuilles de papier mince comprenant la pâte d'écorce d'Eucalyptus globulus pour la production de produits ménagers et hygiéniques, tels que du papier hygiénique, des serviettes et des rouleaux d'essuie-tout.
PCT/EP2020/065123 2019-06-03 2020-06-01 Pâte d'écorce d'eucalyptus globulus pour des produits en papier Ceased WO2020245071A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
PT115562 2019-06-03
PT115562A PT115562B (pt) 2019-06-03 2019-06-03 Pasta celulósica de casca de eucalyptus globulus, e seu processo de produção, para produtos de papel tissue
EP19020674.8A EP3748077B1 (fr) 2019-06-03 2019-12-05 Pulpe d'écorce d'eucalyptus globulus pour produits textiles
EP19020674.8 2019-12-05

Publications (1)

Publication Number Publication Date
WO2020245071A1 true WO2020245071A1 (fr) 2020-12-10

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PCT/EP2020/065123 Ceased WO2020245071A1 (fr) 2019-06-03 2020-06-01 Pâte d'écorce d'eucalyptus globulus pour des produits en papier

Country Status (3)

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EP (1) EP3748077B1 (fr)
PT (1) PT115562B (fr)
WO (1) WO2020245071A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4261343A1 (fr) 2022-04-13 2023-10-18 SCA Forest Products AB Conversion de résidus de biomasse en bio-huile

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0347154A2 (fr) 1988-06-14 1989-12-20 The Procter & Gamble Company Papier tissu doux
EP0478045A1 (fr) 1990-09-12 1992-04-01 Eka Nobel Aktiebolag Papier doux à haute tenacité et procédé de son préparation
US5316623A (en) 1991-12-09 1994-05-31 Hercules Incorporated Absorbance and permanent wet-strength in tissue and toweling paper
EP0981668A1 (fr) 1997-05-12 2000-03-01 The Procter & Gamble Company Papier de soie doux multicouche comportant un agent de renforcement depose sur sa surface
WO2000019005A1 (fr) * 1998-09-30 2000-04-06 Kimberly-Clark Worldwide, Inc. Article en papier hygienique fabrique par modification de fibres grossieres et son procede de fabrication
US6296736B1 (en) * 1997-10-30 2001-10-02 Kimberly-Clark Worldwide, Inc. Process for modifying pulp from recycled newspapers
JP2010136646A (ja) * 2008-12-10 2010-06-24 Oji Paper Co Ltd 樹皮原料から糖類を製造する方法
JP2011047083A (ja) * 2009-08-28 2011-03-10 Oji Paper Co Ltd 靭皮繊維の製造方法及び靭皮繊維
CN102011334A (zh) 2010-11-11 2011-04-13 梁锋 一种利用桉树皮制浆及造纸的方法
JP2011193981A (ja) * 2010-03-18 2011-10-06 Nippon Paper Industries Co Ltd 衛生用紙
US20130029106A1 (en) * 2011-07-28 2013-01-31 Georgia-Pacific Consumer Products Lp High Softness, High Durability Bath Tissue Incorporating High Lignin Eucalyptus Fiber
CN109082929A (zh) 2018-09-06 2018-12-25 梁理鼎 一种利用桉树皮生产造纸纸浆的方法以及纸浆

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2435454B1 (fr) * 2009-05-28 2022-03-23 Suzano Canada Inc. Dérivés de lignine naturelle provenant de charges d'alimentation fibreuses annuelles

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0347154A2 (fr) 1988-06-14 1989-12-20 The Procter & Gamble Company Papier tissu doux
EP0478045A1 (fr) 1990-09-12 1992-04-01 Eka Nobel Aktiebolag Papier doux à haute tenacité et procédé de son préparation
US5316623A (en) 1991-12-09 1994-05-31 Hercules Incorporated Absorbance and permanent wet-strength in tissue and toweling paper
EP0981668A1 (fr) 1997-05-12 2000-03-01 The Procter & Gamble Company Papier de soie doux multicouche comportant un agent de renforcement depose sur sa surface
US6296736B1 (en) * 1997-10-30 2001-10-02 Kimberly-Clark Worldwide, Inc. Process for modifying pulp from recycled newspapers
WO2000019005A1 (fr) * 1998-09-30 2000-04-06 Kimberly-Clark Worldwide, Inc. Article en papier hygienique fabrique par modification de fibres grossieres et son procede de fabrication
JP2010136646A (ja) * 2008-12-10 2010-06-24 Oji Paper Co Ltd 樹皮原料から糖類を製造する方法
JP2011047083A (ja) * 2009-08-28 2011-03-10 Oji Paper Co Ltd 靭皮繊維の製造方法及び靭皮繊維
JP2011193981A (ja) * 2010-03-18 2011-10-06 Nippon Paper Industries Co Ltd 衛生用紙
CN102011334A (zh) 2010-11-11 2011-04-13 梁锋 一种利用桉树皮制浆及造纸的方法
CN102011334B (zh) * 2010-11-11 2013-04-10 梁锋 一种利用桉树皮制浆及造纸的方法
US20130029106A1 (en) * 2011-07-28 2013-01-31 Georgia-Pacific Consumer Products Lp High Softness, High Durability Bath Tissue Incorporating High Lignin Eucalyptus Fiber
CN109082929A (zh) 2018-09-06 2018-12-25 梁理鼎 一种利用桉树皮生产造纸纸浆的方法以及纸浆

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4261343A1 (fr) 2022-04-13 2023-10-18 SCA Forest Products AB Conversion de résidus de biomasse en bio-huile
WO2023198587A1 (fr) 2022-04-13 2023-10-19 Sca Forest Products Ab Conversion de résidus de biomasse en bio-huile

Also Published As

Publication number Publication date
PT115562A (pt) 2020-12-03
PT115562B (pt) 2021-12-24
EP3748077C0 (fr) 2025-03-12
EP3748077A1 (fr) 2020-12-09
EP3748077B1 (fr) 2025-03-12

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