FI832001A0 - Kemisk behandling i tvao steg av mekanisk traemassa - Google Patents

Kemisk behandling i tvao steg av mekanisk traemassa

Info

Publication number
FI832001A0
FI832001A0 FI832001A FI832001A FI832001A0 FI 832001 A0 FI832001 A0 FI 832001A0 FI 832001 A FI832001 A FI 832001A FI 832001 A FI832001 A FI 832001A FI 832001 A0 FI832001 A0 FI 832001A0
Authority
FI
Finland
Prior art keywords
traemassa
mekanisk
kemisk
tvao
behandling
Prior art date
Application number
FI832001A
Other languages
English (en)
Other versions
FI73746C (fi
FI832001L (fi
FI73746B (fi
Inventor
David Morson Mackie
Peter Joyce
Original Assignee
Mac Millan 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 Mac Millan Bloedel Ltd filed Critical Mac Millan Bloedel Ltd
Publication of FI832001A0 publication Critical patent/FI832001A0/fi
Publication of FI832001L publication Critical patent/FI832001L/fi
Application granted granted Critical
Publication of FI73746B publication Critical patent/FI73746B/fi
Publication of FI73746C publication Critical patent/FI73746C/fi

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)
FI832001A 1982-06-04 1983-06-03 Foerfarande foer kemisk behandling i tvao steg av mekanisk traemassa. FI73746C (fi)

Applications Claiming Priority (2)

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
US38528682 1982-06-04

Publications (4)

Publication Number Publication Date
FI832001A0 true FI832001A0 (fi) 1983-06-03
FI832001L FI832001L (fi) 1983-12-05
FI73746B FI73746B (fi) 1987-07-31
FI73746C FI73746C (fi) 1987-11-09

Family

ID=23520786

Family Applications (1)

Application Number Title Priority Date Filing Date
FI832001A FI73746C (fi) 1982-06-04 1983-06-03 Foerfarande foer kemisk behandling i tvao steg av mekanisk traemassa.

Country Status (7)

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

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 (fi) * 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
US20100175840A1 (en) * 2007-06-12 2010-07-15 Hart Peter W High yield and enhanced performance fiber
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
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
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 (fi) * 2021-08-17 2023-02-18 Metsae Board Oyj Menetelmä, sen käyttö, massakoostumus ja järjestelmä

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
DE3366030D1 (en) 1986-10-16
US4502918A (en) 1985-03-05
EP0096548A1 (en) 1983-12-21
FI73746C (fi) 1987-11-09
EP0096548B1 (en) 1986-09-10
CA1177608A (en) 1984-11-13
NO162475C (no) 1990-01-03
NO832029L (no) 1983-12-05
FI832001L (fi) 1983-12-05
NO162475B (no) 1989-09-25
JPS5915589A (ja) 1984-01-26
FI73746B (fi) 1987-07-31

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Legal Events

Date Code Title Description
MM Patent lapsed

Owner name: MACMILLAN BLOEDEL LIMITED