CA2633800A1 - A method for manufacturing mechanical pulp - Google Patents

A method for manufacturing mechanical pulp Download PDF

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Publication number
CA2633800A1
CA2633800A1 CA002633800A CA2633800A CA2633800A1 CA 2633800 A1 CA2633800 A1 CA 2633800A1 CA 002633800 A CA002633800 A CA 002633800A CA 2633800 A CA2633800 A CA 2633800A CA 2633800 A1 CA2633800 A1 CA 2633800A1
Authority
CA
Canada
Prior art keywords
stock
mechanical pulp
accepted
rejected
refining
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.)
Granted
Application number
CA002633800A
Other languages
French (fr)
Other versions
CA2633800C (en
Inventor
Esko Harkonen
Taisto Tienvieri
Jouko H. Lehto
Markku Gummerus
Folke Orsa
Liisa Pirinen
Mia Piirainen
Jean-Cristophe Hostachy
Serge Kocimski
Ernst-Martin Billing
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.)
UPM Kymmene Oy
ITT Manufacturing Enterprises LLC
Original Assignee
Individual
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=37623877&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA2633800(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Individual filed Critical Individual
Publication of CA2633800A1 publication Critical patent/CA2633800A1/en
Application granted granted Critical
Publication of CA2633800C publication Critical patent/CA2633800C/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
    • D21B1/14—Disintegrating in mills
    • D21B1/16—Disintegrating in mills in the presence of chemical agents
    • 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
    • D21C9/147—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications
    • D21C9/153—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications with ozone

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)

Abstract

The present invention relates to a method for manufacturing mechanical pulp, the method comprising - introducing raw material of the mechanical pulp, - refining the raw material in a first refining stage in order to form the mechanical pulp, - adjusting the pH of the mechanical pulp between 9 and 11 in a process step in which a first process delay is arranged, the first process delay being at least 0.5 hours, - sorting the mechanical pulp into a first accepted stock (A1) and a first rejected stock (R1), - ozonizing the first rejected stock (R1) whose pH at the start of the ozonation process is between 9 and 11, - refining the ozonated first rejected stock (R1) in a second refining stage so that at least a part of it will belong to a second accepted stock, and - combining the accepted stocks.
The present invention also relates to the use of the mechanical pulp.

Claims (8)

1. A method for manufacturing mechanical pulp, the method comprising - introducing raw material of the mechanical pulp, - refining the raw material in a first refining stage in order to form the mechanical pulp, - adjusting the pH of the mechanical pulp between 9 and 11 in a process step in which a first process delay is arranged, the first process delay being at least 0.5 hours, - sorting the mechanical pulp into a first accepted stock (A1) and a first rejected stock (R1), - treating with ozone the first rejected stock (R1) whose pH at the start of the ozonation process is between 9 and 11, - refining the ozonated first rejected stock (R1) in a second refining stage so that at least a part of it will belong to a second accepted stock, and - combining the accepted stocks.
2. The method according to claim 1, characterized in that the first rejected stock (R1) is ozonated at a consistency which is higher that 30 %.
3. The method according to claim 1 or 2, characterized in that the treatment of the first rejected stock (R1) comprises - sorting of the ozonated and refined first rejected stock (R1) to the second accepted stock and a second rejected stock.
4. The method according to any preceding claim, characterized in that the treatment of the first accepted stock (A1) comprises - ozonizing the first accepted stock (A1).
5. The method according to claim 4, characterized in that the first accepted stock (A1) is ozonated at a consistency of from 0.5 to 1.5 %.
6. The method according to any preceding claim, characterized in that the treatment of the first accepted stock (A1) further comprises - adding alkali to the ozonated first accepted stock (A1) in a process step in which a second process delay is arranged, the second process delay being at least 0.5 hours.
7. The method according to any preceding claim, characterized in that the accepted stocks are bleached.
8. Use of the mechanical pulp manufactured according to any preceding claim in a paper product manufacturing process.
CA2633800A 2006-12-28 2007-12-27 A method for manufacturing mechanical pulp Expired - Fee Related CA2633800C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FI20065860A FI119062B (en) 2006-12-28 2006-12-28 Process for the manufacture of mechanical pulp
FI20065860 2006-12-28
PCT/FI2007/050721 WO2008081078A1 (en) 2006-12-28 2007-12-27 A method for manufacturing mechanical pulp

Publications (2)

Publication Number Publication Date
CA2633800A1 true CA2633800A1 (en) 2008-06-28
CA2633800C CA2633800C (en) 2011-08-02

Family

ID=37623877

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2633800A Expired - Fee Related CA2633800C (en) 2006-12-28 2007-12-27 A method for manufacturing mechanical pulp

Country Status (9)

Country Link
US (1) US20110036523A1 (en)
EP (1) EP2097582A4 (en)
JP (1) JP4882090B2 (en)
CN (1) CN101389808B (en)
BR (1) BRPI0707368A2 (en)
CA (1) CA2633800C (en)
FI (1) FI119062B (en)
RU (1) RU2373313C1 (en)
WO (1) WO2008081078A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI123113B (en) * 2008-09-10 2012-11-15 Upm Kymmene Corp Procedure for the manufacture of mechanical pulp and the use of mechanical pulp
FR2937656B1 (en) * 2008-10-24 2010-11-19 Arkema France PROCESS FOR PRODUCING PAPER PULP
JP5729095B2 (en) * 2011-03-31 2015-06-03 日本製紙株式会社 Method for producing hardwood mechanical pulp
FR2980805B1 (en) 2011-09-30 2013-09-20 Arkema France ENZYMATIC PRETREATMENT OF WOOD IN A PROCESS FOR THE MANUFACTURE OF MECHANICAL PAPER PULP
US9982387B2 (en) * 2012-05-21 2018-05-29 Oji Holdings Corporation Method for producing fine fibers and sheet containing fine fibers
CA2824076A1 (en) 2012-08-21 2014-02-21 University Of New Brunswick System and method for reclaiming rejects in sulfite pulping
SE538752C2 (en) * 2014-11-21 2016-11-08 Innventia Ab Process for the production of a treated pulp, treated pulp, and textile fibres produced from the treated pulp
EP3502348B1 (en) * 2017-12-21 2020-06-24 BillerudKorsnäs AB Fibre fractionation

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3013932A (en) * 1958-01-14 1961-12-19 Hawaiian Dev Company Ltd Printing paper and process of making the same
NO131996C (en) 1973-10-04 1975-09-03 Papirind Forskningsinst
FI67412C (en) 1977-04-27 1985-03-11 Myrens Verksted As FOERFARANDE FOER BEHANDLING AV CELLULOSAHALTIG MASSA
NO142091C (en) * 1977-10-17 1980-06-25 Myrens Verksted As PROCEDURE FOR OZONE TREATMENT OF REFINO MECHANICAL AND THERMOMECHANICAL MASS.
US4718980A (en) * 1985-12-30 1988-01-12 Weyerhaeuser Company Interstage treatment of mechanical pulp
JP2825346B2 (en) * 1990-05-17 1998-11-18 ユニオン キャンプ コーポレイション Environmentally improved bleaching method for lignocellulosic materials
US5503709A (en) * 1994-07-27 1996-04-02 Burton; Steven W. Environmentally improved process for preparing recycled lignocellulosic materials for bleaching
SE520707C2 (en) * 2001-12-05 2003-08-12 Metso Paper Inc Method and system for treating pulp in ozone bleaching
FI121792B (en) * 2003-06-30 2011-04-15 Andritz Oy Method of treating pulp in connection with bleaching of chemical pulp
CN1263923C (en) * 2004-09-15 2006-07-12 中国科学院广州化学研究所 Supersonic chemical pretreating method for bagasse for wood-plastic composite material

Also Published As

Publication number Publication date
US20110036523A1 (en) 2011-02-17
EP2097582A4 (en) 2013-12-25
BRPI0707368A2 (en) 2011-05-03
JP2009530508A (en) 2009-08-27
FI20065860A0 (en) 2006-12-28
CN101389808A (en) 2009-03-18
CN101389808B (en) 2011-05-11
WO2008081078A1 (en) 2008-07-10
FI119062B (en) 2008-07-15
JP4882090B2 (en) 2012-02-22
EP2097582A1 (en) 2009-09-09
CA2633800C (en) 2011-08-02
RU2373313C1 (en) 2009-11-20

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Effective date: 20171227