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NZ738648B2 - A method for treating starch in pulp, paper and board making processes - Google Patents

A method for treating starch in pulp, paper and board making processes Download PDF

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Publication number
NZ738648B2
NZ738648B2 NZ738648A NZ73864816A NZ738648B2 NZ 738648 B2 NZ738648 B2 NZ 738648B2 NZ 738648 A NZ738648 A NZ 738648A NZ 73864816 A NZ73864816 A NZ 73864816A NZ 738648 B2 NZ738648 B2 NZ 738648B2
Authority
NZ
New Zealand
Prior art keywords
starch
pulp
amphoteric
acid
cationic
Prior art date
Application number
NZ738648A
Other versions
NZ738648A (en
Inventor
Jaakko Ekman
Matti Hietaniemi
Asko Karppi
Marko Kolari
Original Assignee
Kemira Oyj
Filing date
Publication date
Priority claimed from FI20155612A external-priority patent/FI127598B/en
Application filed by Kemira Oyj filed Critical Kemira Oyj
Publication of NZ738648A publication Critical patent/NZ738648A/en
Publication of NZ738648B2 publication Critical patent/NZ738648B2/en

Links

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
    • 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
    • D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
    • D21C5/02—Working-up waste 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
    • D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
    • D21H11/14—Secondary fibres
    • 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
    • D21H17/24—Polysaccharides
    • D21H17/28—Starch
    • 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
    • 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
    • D21H17/42—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing ionic groups anionic
    • D21H17/43—Carboxyl groups or 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
    • D21H17/33—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
    • D21H17/455—Nitrogen-containing groups comprising tertiary amine or being at least partially quaternised
    • 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
    • D21H21/36—Biocidal agents, e.g. fungicidal, bactericidal, insecticidal agents
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/64—Paper recycling

Abstract

The invention relates to a method for treating starch in pulp, paper and board making processes, in which processes recycled fibre material is used as raw material wherein the recycled fibre material is pulped in a pulper and obtaining a pulp flow comprising an aqueous phase and at least recycled fibres and starch dispersed in the aqueous phase. The method comprising the following steps: - adding amylase enzyme inhibitor and/or at least one biocide to pulp flow or to an aqueous process flow comprising starch for preventing starch degradation, and - adding an amphoteric polymer obtained by copolymerisation of (meth)acrylamide with cationic and anionic monomers to pulp flow or to an aqueous process flow comprising starch for binding starch to the fibres.

Claims (23)

Claims
1. A method for treating starch in pulp, paper and board making processes, in which processes recycled fibre material is used as raw material wherein the 5 recycled fibre material, such as paper, board and/or broke, is pulped in a pulper and obtaining a pulp flow sing an aqueous phase and at least recycled fibres and starch dispersed in the aqueous phase, wherein the method comprises the following steps: - adding amylase enzyme tor and/or at least one biocide to pulp flow or 10 to an s process flow comprising starch for preventing starch degradation, and - adding an amphoteric polyacrylamide obtained by copolym erisation of (meth)acrylamide with cationic and anionic monomers, which amphoteric polyacrylamide has the mass e molecular weight over 1 500 000 g/mol 15 and 10 – 90 % of the charged groups are cationic, to pulp flow or to an aqueous process flow comprising starch for g starch to the fibres.
2. The method according to claim 1, wherein the starch is a low molecular weight starch comprising an acid or enzyme modified surface size starch.
3. The method ing to claim 1 or 2, wherein the mass average molecular weight of the amphoteric polyacrylamide is in the range of 1 500 000 – 6 000 000 g/mol. 25
4. The method according to claim 1 or 2, wherein the mass average molecular weight of the amphoteric polyacrylamide is in the range of 2 500 000 – 4 500 000 g/mol.
5. The method according to claim 1 or 2, wherein the mass average 30 molecular weight of the amphoteric polyacrylamide is in the range of 2 700 000 – 4 300 000 g/mol.
6. The method according to any one of the preceding claims, wherein the net charge of the amphoteric rylamide is cationic.
7. The method according to any one of the preceding claims, wherein 30 – 90 %of the d groups in the amphoteric polyacrylamide are cationic.
8. The method according to any one of the preceding , wherein 50 – 85 % of the charged groups in the amphoteric polyacrylamide are cationic. 5
9. The method according to any one of the preceding , wherein 60 – 80 % of the charged groups in the amphoteric polyacrylamide are cationic.
10. The method ing to any one of the preceding claims, wherein the total ty of the amphoteric polyacrylamide is in the range of 2-70 mol-%.
11. The method according to any one of the preceding claims, wherein the total ty of the amphoteric polyacrylamide is in the range of 2-50 mol-%.
12. The method according to any one of the preceding claims, n the 15 total ionicity of the amphoteric polyacrylamide is in the range of 4-30 mol-%.
13. The method according to any one of the preceding claims, wherein the total ionicity of the amphoteric rylamide is in the range of 6-10 mol-%. 20
14. The method according to any one of the preceding claims, wherein the cationic groups in the amphoteric polyacrylamide originate from monomers selected from 2-(dimethylamino)ethyl acrylate (ADAM), [2-(acryloyloxy)ethyl] trimethylammonium chloride (ADAM-Cl), 2-(dimethylamino)ethyl acrylate benzylchloride, 2-(dimethylamino)ethyl acrylate dimethylsulphate, 2- 25 dimethylaminoethyl methacrylate (MADAM), [2-(methacryloyloxy)ethyl] trimethylammonium chloride (MADAM-Cl), 2-dimethylaminoethyl methacrylate ylsulphate, [3-(acryloylamino)propyl] trimethylammonium chloride (APTAC), thacryloylamino)propyl] trimethylammonium chloride (MAPTAC) and diallyldimethyl¬ammonium chloride (DADMAC).
15. The method according to any one of the preceding claims, wherein the anionic groups in the amphoteric polyacrylamide originate from monomers selected from unsaturated mono- or dicarboxylic acids, such as acrylic acid, maleic acid, fumaric acid, itaconic acid, aconitic acid, mesaconic acid, 35 citraconic acid, crotonic acid, tonic acid, angelic acid or tiglic acid.
16. The method according to any one of the preceding claims, wherein amylase enzyme inhibitor comprises zinc ions.
17. The method according to any one of the ing , wherein 5 - adding at least one cationic coagulant to pulp flow or to an aqueous process flow comprising starch for improving starch ion.
18. The method according to claim 17, wherein the ic coagulant is selected from the group comprising: bentonite, colloidal silica and 10 conventional papermaking fixatives, such as polydiallyldimethylammonium chloride (poly-DADMAC) or polyamines, polyvinyl amine (PVAm), cationic polyacrylamide ), hyleneimine (PEI), polyamidoamineepichlorohydrin (PAAE), polyaluminum chloride, alum, methacrylamidopropyltrimethylammonium chloride (MAPTAC) or their 15 mixtures.
19. The method according to any one of the preceding claims, wherein biocide and/or amylase enzyme inhibitor are added simultaneously with the amphoteric polymer to pulp flow or process flow.
20. The method according to any one of the preceding claims, wherein biocide and/or amylase enzyme inhibitor are added prior to the addition of said amphoteric polymer to pulp flow or process flow. 25
21. The method according to any one of the preceding claims, wherein amphoteric polymer is added to the broke system, pulp, pulp storage tanks, to the water entering the pulper or into the pulper, water storage tanks or to pipe line before the broke or pulp storage tanks. 30
22. The method according to any one of the preceding claims, wherein at least one coagulant is added aneously with the amphoteric polymer or after the addition of said eric polymer to pulp flow or process flow.
23. The method according to claim 1, substantially as herein described with 35 reference to any one of the examples thereof.
NZ738648A 2016-08-26 A method for treating starch in pulp, paper and board making processes NZ738648B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20155612A FI127598B (en) 2015-08-27 2015-08-27 A process for treating starch in pulp, paper and board manufacturing processes
PCT/FI2016/050583 WO2017032927A1 (en) 2015-08-27 2016-08-26 A method for treating starch in pulp, paper and board making processes

Publications (2)

Publication Number Publication Date
NZ738648A NZ738648A (en) 2024-03-22
NZ738648B2 true NZ738648B2 (en) 2024-06-25

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