DE3366030D1 - Two-stage chemical treatment of mechanical wood pulp - Google Patents

Two-stage chemical treatment of mechanical wood pulp

Info

Publication number
DE3366030D1
DE3366030D1 DE8383303194T DE3366030T DE3366030D1 DE 3366030 D1 DE3366030 D1 DE 3366030D1 DE 8383303194 T DE8383303194 T DE 8383303194T DE 3366030 T DE3366030 T DE 3366030T DE 3366030 D1 DE3366030 D1 DE 3366030D1
Authority
DE
Germany
Prior art keywords
chemical treatment
wood pulp
stage chemical
mechanical wood
mechanical
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.)
Expired
Application number
DE8383303194T
Other languages
English (en)
Inventor
David Morson Mackie
Peter Joyce
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.)
MacMillan Bloedel Ltd
Original Assignee
MacMillan Bloedel Ltd
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 MacMillan Bloedel Ltd filed Critical MacMillan Bloedel Ltd
Application granted granted Critical
Publication of DE3366030D1 publication Critical patent/DE3366030D1/de
Expired legal-status Critical Current

Links

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
    • D21B1/02—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
    • D21C3/22—Other features of pulping processes
    • D21C3/26—Multistage processes
    • D21C3/266—Multistage processes the same pulping agent being used in all stages

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Silicates, Zeolites, And Molecular Sieves (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Centrifugal Separators (AREA)
DE8383303194T 1982-06-04 1983-06-02 Two-stage chemical treatment of mechanical wood pulp Expired DE3366030D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/385,286 US4502918A (en) 1981-06-10 1982-06-04 Two-stage chemical treatment of mechanical wood pulp with sodium sulfite

Publications (1)

Publication Number Publication Date
DE3366030D1 true DE3366030D1 (en) 1986-10-16

Family

ID=23520786

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8383303194T Expired DE3366030D1 (en) 1982-06-04 1983-06-02 Two-stage chemical treatment of mechanical wood pulp

Country Status (7)

Country Link
US (1) US4502918A (de)
EP (1) EP0096548B1 (de)
JP (1) JPS5915589A (de)
CA (1) CA1177608A (de)
DE (1) DE3366030D1 (de)
FI (1) FI73746C (de)
NO (1) NO162475C (de)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE441282B (sv) * 1984-02-22 1985-09-23 Mo Och Domsjoe Ab Forfarande for framstellning av forbettrad hogutbytesmassa
SE444825B (sv) * 1984-09-10 1986-05-12 Mo Och Domsjoe Ab Forfarande for framstellning av forbettrad hogutbytesmassa
US5089089A (en) * 1984-12-31 1992-02-18 Bear Island Paper Company System for sulfonating mechanical pulp fibers
US4708771A (en) * 1984-12-31 1987-11-24 Bear Island Paper Company Two stage process for sulfonating mechanical pulp fibers
NZ211684A (en) * 1985-04-04 1989-07-27 Caxton Paper Ltd Manufacture of cellulose pulp: second digestion step follows initial digestion and refining steps
US4731160A (en) * 1986-03-19 1988-03-15 Kamyr, Inc. Drainage characteristics of mechanical pulp
SE8601477L (sv) * 1986-04-02 1987-10-03 Sunds Defibrator Sett for behandling av mekanisk massa
SE8701423L (sv) * 1987-04-06 1988-10-07 Kamyr Ab Foerfarande vid framstaellning av fiberhaltig massa med olika raamaterial
JPH035255U (de) * 1989-06-07 1991-01-18
US5169496A (en) * 1991-04-23 1992-12-08 International Paper Company Method of producing multi-ply paper and board products exhibiting increased stiffness
US5853534A (en) * 1992-12-30 1998-12-29 Sunds Defibrator Industries Ab Method of producing pulp with high yield using a two-stage refining system operating at different temperatures
AT398990B (de) * 1993-01-29 1995-02-27 Ortwin Bobleter Verfahren zur hydrolyse von pflanzenmaterialien
US5503710A (en) * 1995-05-31 1996-04-02 Macmillan Bloedel Limited Duplex linerboard formed from old corrugated containers
US6350350B1 (en) 1997-04-01 2002-02-26 Science Applications International Corp. Integrated system and method for purifying water, producing pulp and paper and improving soil quality
US7384502B2 (en) * 2002-12-24 2008-06-10 Nippon Paper Industries Co., Ltd. Process for impregnating, refining, and bleaching wood chips having low bleachability to prepare mechanical pulps having high brightness
JP4273772B2 (ja) * 2003-01-23 2009-06-03 日本製紙株式会社 ケミサーモメカニカルパルプおよびその製造方法と用途
US20080308239A1 (en) * 2007-06-12 2008-12-18 Hart Peter W Fiber blend having high yield and enhanced pulp performance and method for making same
WO2008153565A1 (en) * 2007-06-12 2008-12-18 Meadwestvaco Corporation A fiber blend having high yield and enhanced pulp performance and method for making same
US20100175840A1 (en) * 2007-06-12 2010-07-15 Hart Peter W High yield and enhanced performance fiber
US20100224333A1 (en) * 2009-03-09 2010-09-09 Prasad Duggirala Method and chemical composition to improve efficiency of mechanical pulp
CA2824076A1 (en) 2012-08-21 2014-02-21 University Of New Brunswick System and method for reclaiming rejects in sulfite pulping
WO2018066165A1 (ja) 2016-10-05 2018-04-12 三菱電機株式会社 信号伝達回路および電力変換装置
FI20215861A1 (en) * 2021-08-17 2023-02-18 Metsae Board Oyj Method, use thereof, pulp composition and system

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2847304A (en) * 1952-04-10 1958-08-12 Hammermill Paper Co Semi-chemical pulp process
US3597310A (en) * 1966-04-25 1971-08-03 Kokusaku Pulp Ind Co Ltd Method of producing high yield pulp by disc refining at ph of 12 to 14
US3607613A (en) * 1968-05-27 1971-09-21 Sylvania Electric Prod Electrically conductive refractory bodies
CA1075857A (en) * 1976-02-20 1980-04-22 Price Company Limited (The) Chemical pretreatment of wood prior to making refiner groundwood
US4116758A (en) * 1976-05-14 1978-09-26 Canadian International Paper Co. Method of producing high yield chemimechanical pulps
US4145246A (en) * 1976-07-19 1979-03-20 Crown Zellerbach Corporation Process for making high-strength, high-yield sulfite-modified thermomechanical pulp and a linerboard composition produced therefrom
CA1071805A (en) * 1977-10-25 1980-02-19 Ontario Paper Company Limited (The) Drainage and wet stretch improvement in mechanical pulps
SU827656A1 (ru) * 1979-07-11 1981-05-07 Центральный Научно-Исследовательскийинститут Бумаги Способ получени древесной массы
AU531907B2 (en) * 1979-12-17 1983-09-08 Ontario Paper Co. Ltd., The Forming refiner pulps

Also Published As

Publication number Publication date
NO832029L (no) 1983-12-05
FI73746C (fi) 1987-11-09
US4502918A (en) 1985-03-05
FI73746B (fi) 1987-07-31
NO162475C (no) 1990-01-03
EP0096548B1 (de) 1986-09-10
NO162475B (no) 1989-09-25
JPS5915589A (ja) 1984-01-26
FI832001L (fi) 1983-12-05
FI832001A0 (fi) 1983-06-03
CA1177608A (en) 1984-11-13
EP0096548A1 (de) 1983-12-21

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee