CA1334240C - Method of making chemi-mechanical pulp from hardwood - Google Patents

Method of making chemi-mechanical pulp from hardwood

Info

Publication number
CA1334240C
CA1334240C CA 608079 CA608079A CA1334240C CA 1334240 C CA1334240 C CA 1334240C CA 608079 CA608079 CA 608079 CA 608079 A CA608079 A CA 608079A CA 1334240 C CA1334240 C CA 1334240C
Authority
CA
Canada
Prior art keywords
pulp
naoh
refining
wood
per ton
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 - Fee Related
Application number
CA 608079
Other languages
English (en)
French (fr)
Inventor
Michael Jackson
Ove Danielsson
Bo Falk
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.)
Valmet AB
Original Assignee
Sunds Defibrator AB
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 Sunds Defibrator AB filed Critical Sunds Defibrator AB
Application granted granted Critical
Publication of CA1334240C publication Critical patent/CA1334240C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • D21C1/00—Pretreatment of the finely-divided materials before digesting
    • D21C1/06—Pretreatment of the finely-divided materials before digesting with alkaline reacting compounds
    • 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
    • D21C3/02—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate processes
    • D21C3/022—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate processes in presence of S-containing compounds
    • 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
    • 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
    • D21C9/16—Bleaching ; Apparatus therefor with per compounds
    • D21C9/163—Bleaching ; Apparatus therefor with per compounds with peroxides

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Paper (AREA)
CA 608079 1988-09-14 1989-08-11 Method of making chemi-mechanical pulp from hardwood Expired - Fee Related CA1334240C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8803244A SE460124B (sv) 1988-09-14 1988-09-14 Saett foer framstaellning av kemimekanisk massa av loevved
SE8803244-6 1988-09-14

Publications (1)

Publication Number Publication Date
CA1334240C true CA1334240C (en) 1995-02-07

Family

ID=20373326

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 608079 Expired - Fee Related CA1334240C (en) 1988-09-14 1989-08-11 Method of making chemi-mechanical pulp from hardwood

Country Status (8)

Country Link
EP (1) EP0434696A1 (sv)
AU (1) AU616999B2 (sv)
BR (1) BR8907631A (sv)
CA (1) CA1334240C (sv)
ES (1) ES2017145A6 (sv)
FI (1) FI911242A0 (sv)
SE (1) SE460124B (sv)
WO (1) WO1990002835A1 (sv)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2634233B1 (fr) * 1988-07-12 1995-04-14 Atochem Procede de fabrication de pates chimicothermomecaniques blanchies
US6284727B1 (en) 1993-04-07 2001-09-04 Scios, Inc. Prolonged delivery of peptides
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
CN100545347C (zh) * 2006-03-17 2009-09-30 中国科学院大连化学物理研究所 一种cmp法造纸制浆的方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE413684C (sv) * 1974-09-23 1987-05-07 Mo Och Domsjoe Ab Forfarande for framstellning av cellulosamassa i utbytesomradet 65-95 %
SE454186C (sv) * 1985-03-13 1989-06-27 Eka Nobel Ab Saett foer framstaellning av kemimekanisk massa
SE456430B (sv) * 1985-11-06 1988-10-03 Sunds Defibrator Sett for framstellning av mekanisk massa
US4718980A (en) * 1985-12-30 1988-01-12 Weyerhaeuser Company Interstage treatment of mechanical pulp
DE3802401A1 (de) * 1988-01-28 1989-08-03 Degussa Verfahren zur herstellung von halbgebleichtem kraftzellstoff

Also Published As

Publication number Publication date
AU616999B2 (en) 1991-11-14
EP0434696A1 (en) 1991-07-03
BR8907631A (pt) 1991-07-30
AU4037489A (en) 1990-04-02
ES2017145A6 (es) 1991-01-01
SE8803244D0 (sv) 1988-09-14
WO1990002835A1 (en) 1990-03-22
FI911242A0 (fi) 1991-03-13
SE460124B (sv) 1989-09-11

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Legal Events

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