FI884558A7 - Menetelmä mekaanisen massan valkaisemiseksi. - Google Patents

Menetelmä mekaanisen massan valkaisemiseksi. Download PDF

Info

Publication number
FI884558A7
FI884558A7 FI884558A FI884558A FI884558A7 FI 884558 A7 FI884558 A7 FI 884558A7 FI 884558 A FI884558 A FI 884558A FI 884558 A FI884558 A FI 884558A FI 884558 A7 FI884558 A7 FI 884558A7
Authority
FI
Finland
Prior art keywords
mechanical pulp
bleaching mechanical
bleaching
pulp
mechanical
Prior art date
Application number
FI884558A
Other languages
English (en)
Finnish (fi)
Swedish (sv)
Other versions
FI884558A0 (fi
FI884558L (fi
Inventor
William Avery Hills
Joseph Charles Richards
Original Assignee
Fmc Corp
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 Fmc Corp filed Critical Fmc Corp
Publication of FI884558A0 publication Critical patent/FI884558A0/fi
Publication of FI884558L publication Critical patent/FI884558L/fi
Publication of FI884558A7 publication Critical patent/FI884558A7/fi

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
    • 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
    • D21C9/1057—Multistage, with compounds cited in more than one sub-group D21C9/10, D21C9/12, D21C9/16

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Glass Compositions (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
FI884558A 1987-10-05 1988-10-04 Menetelmä mekaanisen massan valkaisemiseksi. FI884558A7 (fi)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US10460787A 1987-10-05 1987-10-05

Publications (3)

Publication Number Publication Date
FI884558A0 FI884558A0 (fi) 1988-10-04
FI884558L FI884558L (fi) 1989-04-06
FI884558A7 true FI884558A7 (fi) 1989-04-06

Family

ID=22301388

Family Applications (1)

Application Number Title Priority Date Filing Date
FI884558A FI884558A7 (fi) 1987-10-05 1988-10-04 Menetelmä mekaanisen massan valkaisemiseksi.

Country Status (7)

Country Link
EP (1) EP0311356A1 (enrdf_load_stackoverflow)
JP (1) JPH0197291A (enrdf_load_stackoverflow)
AU (1) AU2335788A (enrdf_load_stackoverflow)
BR (1) BR8805098A (enrdf_load_stackoverflow)
FI (1) FI884558A7 (enrdf_load_stackoverflow)
NO (1) NO884398L (enrdf_load_stackoverflow)
ZA (1) ZA887477B (enrdf_load_stackoverflow)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2659363B1 (fr) * 1990-03-07 1996-04-19 Atochem Procede de preparation de pates a haut rendement blanchies.
BE1004630A3 (fr) * 1990-10-17 1992-12-22 Interox Internat Sa Procede pour la preservation des caracteristiques de resistance mecanique des pates a papier chimiques.
SE515708C2 (sv) * 2000-02-11 2001-10-01 Mo Och Domsjoe Ab Blekning av förblekt mekanisk massa med oxiderande blekmedel förstärkt med borhydrid
US11591751B2 (en) 2019-09-17 2023-02-28 Gpcp Ip Holdings Llc High efficiency fiber bleaching process
US12286751B2 (en) 2021-01-06 2025-04-29 Gpcp Ip Holdings Llc Oxygen treatment of high kappa fibers
US12435469B2 (en) 2022-02-22 2025-10-07 Gpcp Ip Holdings Llc High yield chemical pulping and bleaching process

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2290601A (en) * 1940-02-16 1942-07-21 Du Pont Bleaching of ground wood pulp with preliminary bisulphite treatment
DE834808C (de) * 1950-08-31 1952-03-24 Degussa Verfahren zum Bleichen von mechanisch erzeugten, schwer bleichbaren Faserstoffen, insbesondere Holzschliff
DE1171723B (de) * 1958-11-27 1964-06-04 Mo Och Domsjoe Ab Verfahren zum Veredeln von cellulose-haltigem Material
JPS575992A (en) * 1980-06-04 1982-01-12 Mitsubishi Gas Chemical Co Bleaching of high yield pulp by peroxide
FR2604197B1 (fr) * 1986-09-23 1988-11-18 Atochem Procede de blanchiment de matieres lignocellulosiques.

Also Published As

Publication number Publication date
AU2335788A (en) 1989-05-25
FI884558A0 (fi) 1988-10-04
JPH0229791B2 (enrdf_load_stackoverflow) 1990-07-02
ZA887477B (en) 1989-06-28
FI884558L (fi) 1989-04-06
NO884398D0 (no) 1988-10-04
BR8805098A (pt) 1989-05-16
NO884398L (no) 1989-04-06
EP0311356A1 (en) 1989-04-12
JPH0197291A (ja) 1989-04-14

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Legal Events

Date Code Title Description
MM Patent lapsed

Owner name: FMC CORPORATION