EP4396409A1 - Use of modified lignin as a wet end strength additive - Google Patents

Use of modified lignin as a wet end strength additive

Info

Publication number
EP4396409A1
EP4396409A1 EP22793828.9A EP22793828A EP4396409A1 EP 4396409 A1 EP4396409 A1 EP 4396409A1 EP 22793828 A EP22793828 A EP 22793828A EP 4396409 A1 EP4396409 A1 EP 4396409A1
Authority
EP
European Patent Office
Prior art keywords
lignin
based compound
cationic polymer
added
pulp slurry
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.)
Pending
Application number
EP22793828.9A
Other languages
German (de)
English (en)
French (fr)
Inventor
David Steven Jordan
Hequing HUANG
Weiguo Cheng
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.)
Ecolab USA Inc
Original Assignee
Ecolab USA Inc
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 Ecolab USA Inc filed Critical Ecolab USA Inc
Publication of EP4396409A1 publication Critical patent/EP4396409A1/en
Pending 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
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/33—Synthetic macromolecular compounds
    • D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H17/41—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing ionic groups
    • D21H17/44—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing ionic groups cationic
    • D21H17/45—Nitrogen-containing groups
    • 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
    • D21H17/03—Non-macromolecular organic compounds
    • D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
    • D21H17/14—Carboxylic acids; Derivatives thereof
    • 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
    • D21H17/20—Macromolecular organic compounds
    • D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
    • D21H17/23—Lignins
    • 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
    • D21H17/20—Macromolecular organic compounds
    • D21H17/33—Synthetic macromolecular compounds
    • D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H17/37—Polymers of unsaturated acids or derivatives thereof, e.g. polyacrylates
    • D21H17/375—Poly(meth)acrylamide
    • 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
    • D21H17/20—Macromolecular organic compounds
    • D21H17/33—Synthetic macromolecular compounds
    • D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H17/41—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing ionic groups
    • D21H17/44—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing ionic groups cationic
    • 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
    • D21H17/20—Macromolecular organic compounds
    • D21H17/33—Synthetic macromolecular compounds
    • D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H17/54—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen
    • D21H17/55—Polyamides; Polyaminoamides; Polyester-amides
    • 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
    • D21H17/20—Macromolecular organic compounds
    • D21H17/33—Synthetic macromolecular compounds
    • D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H17/54—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen
    • D21H17/56—Polyamines; Polyimines; Polyester-imides
    • 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
    • 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
    • D21H21/20—Wet strength agents
    • 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
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/04—Addition to the pulp; After-treatment of added substances in the pulp

Definitions

  • a typical papermaking process includes the steps of: 1 ) pulping wood or some other source of papermaking fibers; 2) producing a paper mat from the pulp, the paper mat being an aqueous slurry of cellulosic fiber, which may also contain additives, such as inorganic mineral fillers or pigments; 3) depositing this slurry on a moving papermaking wire or fabric; 4) forming a sheet from the solid components of the slurry by draining the water; 5) pressing and drying the sheet to further remove water, and 6) potentially rewetting the dry sheet by passing it through a size press and further drying it to form a paper product.
  • the dry strength of paper generally includes, for example, internal bonds, dry tensile strength, and burst strength.
  • Commonly used dry strength agents include natural polymers, such as cationic starch, carboxymethyl cellulose (CMC) and guar gum, and synthetic polymers, such as polyacrylamide (cationic, anionic and amphoteric), glyoxalated polyacrylamides (GPAMs), and polyvinylamines.
  • polyacrylamide cationic, anionic and amphoteric
  • GPAM glyoxalated polyacrylamide
  • polyvinylamines polyvinylamines.
  • di-aldehyde functionalized polyacrylamide glyoxalated polyacrylamide (GPAM)
  • GPAM glyoxalated polyacrylamide
  • a method of increasing paper strength includes adding a lignin-based compound to a pulp slurry; and adding a cationic polymer to the pulp slurry.
  • the lignin-based compound has a weight average molecular weight of less than about 100,000 g/mol.
  • the cationic polymer is crosslinked epichlorohydrindimethylamine, poly(amidoamine), or polyethylenimine.
  • the cationic polymer has a charge density of about 0.1 meq/g to about 15 meq/g.
  • the lignin-based compound and the cationic polymer are added to the pulp slurry in a wet end of a papermaking process.
  • the lignin-based compound and the cationic polymer are added to the pulp slurry in a whitewater system, pulp stock storage chest, blend chest, machine chest, headbox, saveall chest, or any combination thereof in the papermaking process.
  • the lignin-based compound is added to the pulp slurry in an amount ranging from about 10 Ib/ton to about 100 Ib/ton.
  • the cationic polymer is added to the pulp slurry in an amount ranging from about 1 Ib/ton to about 30 Ib/ton.
  • the lignin-based compound and the cationic polymer are added to the pulp slurry at a different locations in the wet end.
  • FIG. 3 shows average strength improvement values for sheets made with a lignin-based compound and varying dosages of a poly(DADMAC) polymer and a crosslinked epichlorohydrin-dimethylamine coagulant.
  • a method of increasing paper strength includes adding a lignin-based compound to a pulp slurry and adding a cationic polymer to the pulp slurry.
  • lignin refers to a structural component of the cellulose fiber. Lignin is a high molecular weight, cross-linked organic compound that is relatively hydrophobic. In the papermaking process, lignin is typically removed from the cellulose fiber mass and incinerated; its presence in paper can cause several undesirable effects, such as yellowing and a reduction in strength.
  • the lignin-based compound has a negative zeta potential.
  • the zeta potential of the lignin-based compound can be from about -5 to about -100 mV, from about -30 to about -100 mV, from about -40 to about -80 mV, or from about -50 to about -80 mV.
  • the zeta potential of the ligninbased compound can be from about -60 to about -75 mV.
  • the lignin-based compound can have a particle size less than about 10 pm. In some embodiments, the particle size of the lignin-based compound is less than about 500 nm.
  • the particle size of the lignin-based compound can be determined using transmission electron microscopy (TEM), for example.
  • TEM transmission electron microscopy
  • the lignin-based compound is free of pulp. In some aspects, the lignin-based compound is not associated with pulp fibers prior to addition to the pulp slurry. In some aspects, the lignin-based compound is free of cellulose. In some aspects, the lignin-based compound is not associated with cellulose prior to addition to the pulp slurry. In some aspects, adding a lignin-based compound to a pulp slurry does not include adding pulp containing lignin to a pulp slurry. In some aspects, the lignin-based compound does not include lignosulfonates.
  • Examples of commercially available lignin-based compounds include, but are not limited to, METNINTM SHIELD.
  • the dosage of the lignin-based compound can be selected to achieve an increase in paper strength.
  • the lignin-based compound can be added to the pulp slurry in an amount ranging from about 10 Ib/ton to about 100 Ib/ton.
  • the amount of lignin-based compound added to the pulp slurry is about 20 Ib/ton to about 80 Ib/ton.
  • the amount of lignin-based compound added to the pulp slurry is about 20 Ib/ton, about 30 Ib/ton, about 40 Ib/ton, about 50 Ib/ton, about 60 Ib/ton, about 70 Ib/ton, or about 80 Ib/ton.
  • the cationic polymers can include other non-ionic co-monomers such as acrylamide, methacrylamide, N,N-dimethylacrylamide, N,N-diethylacrylamide, N- isopropylacrylamide, N-vinylamine, N-vinylmethylacetamide, N-vinyl pyrrolidone, hydroxyethyl methacrylate, hydroxyethyl acrylate, hydroxypropyl acrylate, hydroxypropyl methacrylate, N-t-butylacrylamide, N-methylolacrylamide, vinyl acetate, vinyl alcohol, similar monomers, and combinations thereof.
  • the non-ionic co-monomer is acrylamide or methacrylamide.
  • Representative cationic co-monomers may include, for example, dialkylaminoalkyl acrylates and methacrylates and their quaternary or acid salts, including, but not limited to, dimethylaminoethyl acrylate methyl chloride quaternary salt (“DMAEA-MCQ”), dimethylaminoethyl acrylate methyl sulfate quaternary salt, dimethyaminoethyl acrylate benzyl chloride quaternary salt, dimethylaminoethyl acrylate sulfuric acid salt, dimethylaminoethyl acrylate hydrochloric acid salt, dimethylaminoethyl methacrylate methyl chloride quaternary salt, dimethylaminoethyl methacrylate methyl sulfate quaternary salt, dimethylaminoethyl methacrylate benzyl chloride quaternary salt, dimethylaminoethyl methacrylate
  • the cationic monomers are one or more selected from the group consisting of diallyldimethylammonium chloride (DADMAC), N-vinylamine, 2-dimethylaminoethyl acrylate (DMAEA), N,N,N- trimethylethanaminium chloride, diallylamine, poly(amidoamine), and polyethylenimine.
  • the weight average molecular weight of the cationic polymer can range from about 50,000 Da to about 2,000,000 Da. In some aspects, the weight average molecular weight ranges from about 50,000 Da to about 1 ,000,000 Da. For example, the weight average molecular weight may range from about 50,000 Da to about 900,000 Da, from about 50,000 Da to about 800,000 Da, from about 50,000 Da to about 700,000 Da, from about 50,000 Da to about 600,000 Da, from about 50,000 Da to about 500,000 Da, from about 100,000 Da to about 1 ,000,000 Da, from about 200,000 Da to about 1 ,000,000 Da, from about 300,000 Da to about 1 ,000,000 Da, from about 400,000 Da to about 1 ,000,000 Da, from about 500,000 Da to about 1 ,000,000 Da or from about 500,000 Da to about 700,000 Da.
  • the weight average molecular weight is about 1 ,000,000 Da.
  • the charge density of the cationic polymer measured in milliequivalent (meq) per gram (g), can range from about 0.1 meq/g to about 15 meq/g. In some aspects, the charge density of the cationic polymer can range from about 0.5 meq/g to about 10 meq/g. In some aspects, the charge density of the cationic polymer can range from about 1.0 meq/g to about 10 meq/g.
  • the charge density of the cationic polymer is about 1 .0 meq/g, about 2.0 meq/g, about 3.0 meq/g, about 4.0 meq/g, about 4.5 meq/g, about 5.0 meq/g, about 6.0 meq/g, about 7.0 meq/g, about 8.0 meq/g, or about 9.0 meq/g.
  • the dosage of the cationic polymer can be selected to achieve an increase in paper strength.
  • the cationic polymer can be added to the pulp slurry in an amount ranging from about 1 Ib/ton to about 30 Ib/ton.
  • the cationic polymer can be added to the pulp slurry in an amount ranging from about 1 Ib/ton to about 20 Ib/ton.
  • the cationic polymer can be added to the pulp slurry in an amount ranging from about 5 Ib/ton to about 20 Ib/ton.
  • the cationic polymer can be added to the pulp slurry in an amount ranging from about 6 Ib/ton to about 18 Ib/ton.
  • the cationic polymer can be added to the pulp slurry in an amount ranging from about 8 Ib/ton to about 18 Ib/ton.
  • the lignin-based compound and the cationic polymer can be added to the pulp slurry separately or simultaneously. When added simultaneously, the ligninbased compound and the cationic polymer can be added independently or as part of a single composition.
  • the feeding manner of the lignin-based compound and the cationic polymer includes, but is not limited to, adding the components separately into the pulp slurry in any sequence, or adding into the pulp slurry after premixing the components or co-feeding the components into the pulp slurry.
  • the lignin-based compound is added to the pulp slurry before the cationic polymer is added.
  • the lignin-based compound is added to the pulp slurry after the cationic polymer is added.
  • the lignin-based compound and the cationic polymer are added to the pulp slurry at a different locations in the wet end.
  • the “wet end” of a papermaking process refers to those parts that involve a slurry of fibers.
  • the wet end does not include portions of the papermaking process commonly referred to as the “dry end” where pulp is formed into paper sheets and dried.
  • the lignin-based compound and the cationic polymer are added to the pulp slurry in a wet end of a papermaking process.
  • Specific locations or unit operations in the wet end include, but are not limited to, a whitewater system, pulp stock storage chest, blend chest, machine chest, headbox, or saveall chest.
  • a composition that includes a lignin-based compound as described herein and a cationic polymer as described herein.
  • the composition can consist essentially of the lignin-based compound and the cationic polymer.
  • the composition consists of the lignin-based compound and the cationic polymer.
  • the composition consists of the ligninbased compound, the cationic polymer, and a solvent.
  • the solvent can be water, for example.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Paper (AREA)
EP22793828.9A 2021-08-30 2022-08-19 Use of modified lignin as a wet end strength additive Pending EP4396409A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US202163238627P 2021-08-30 2021-08-30
PCT/IB2022/000489 WO2023031667A1 (en) 2021-08-30 2022-08-19 Use of modified lignin as a wet end strength additive

Publications (1)

Publication Number Publication Date
EP4396409A1 true EP4396409A1 (en) 2024-07-10

Family

ID=83995581

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22793828.9A Pending EP4396409A1 (en) 2021-08-30 2022-08-19 Use of modified lignin as a wet end strength additive

Country Status (4)

Country Link
US (1) US20240344271A1 (https=)
EP (1) EP4396409A1 (https=)
JP (1) JP2024530308A (https=)
WO (1) WO2023031667A1 (https=)

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5338406A (en) * 1988-10-03 1994-08-16 Hercules Incorporated Dry strength additive for paper
US5567277A (en) * 1993-05-28 1996-10-22 Calgon Corporation Cellulosic, modified lignin and cationic polymer composition and process for making improved paper or paperboard
CA2124102A1 (en) * 1993-05-28 1994-11-29 David L. Elliott Cellulosic, modified lignin and cationic polymer composition and process for making improved paper or paperboard
US5501773A (en) * 1993-05-28 1996-03-26 Calgon Corporation Cellulosic, modified lignin and cationic polymer composition and process for making improved paper or paperboard
ES2625622T3 (es) * 2006-03-16 2017-07-20 Basf Se Procedimiento para la fabricación de papel, cartulina y cartón con alta resistencia en seco
JP6050122B2 (ja) * 2009-12-29 2016-12-27 ソレニス・テクノロジーズ・ケイマン・エル・ピー ビニルアミン含有ポリマー及びアクリルアミド含有ポリマーを用いた処理による紙の乾燥強度増強法
US9347181B2 (en) * 2013-11-22 2016-05-24 Kemira Oyj Method for increasing paper strength
US9850623B2 (en) * 2014-11-26 2017-12-26 Sally KRIGSTIN Water, grease and heat resistant bio-based products and method of making same
BR112018072376B1 (pt) * 2016-05-03 2023-05-02 Solenis Technologies, L.P Composição para o tratamento da superfície de um produto de papel e método para melhorar a resistência do papel ou papelão a penetrantes aquosos
PL3638845T3 (pl) * 2017-06-16 2025-07-21 Kemira Oyj Układ dodatków zwiększających wytrzymałość i sposób wytwarzania wstęgi zawierającej włókna celulozowe
EP3692207B1 (en) * 2017-10-03 2025-07-30 Solenis Technologies Cayman, L.P. Chemical efficiency increase in papermaking process
MX2020010472A (es) * 2018-04-04 2021-01-08 Solenis Tech Lp Aplicacion asistida con espuma de aditivos de resistencia a los productos de papel.
AU2019300405A1 (en) * 2018-07-12 2021-01-07 Kemira Oyj Method for manufacturing multi-layered fibrous web and multi-layered fibrous web
CA3106494A1 (en) * 2018-07-19 2020-01-23 Kemira Oyj Cellulose composition

Also Published As

Publication number Publication date
WO2023031667A1 (en) 2023-03-09
JP2024530308A (ja) 2024-08-16
US20240344271A1 (en) 2024-10-17

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