FI93749C - Menetelmä mekaanisen massan valmistamiseksi - Google Patents

Menetelmä mekaanisen massan valmistamiseksi Download PDF

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Publication number
FI93749C
FI93749C FI881544A FI881544A FI93749C FI 93749 C FI93749 C FI 93749C FI 881544 A FI881544 A FI 881544A FI 881544 A FI881544 A FI 881544A FI 93749 C FI93749 C FI 93749C
Authority
FI
Finland
Prior art keywords
hydrogen peroxide
pulp
process according
temperature
sequestering agent
Prior art date
Application number
FI881544A
Other languages
English (en)
Finnish (fi)
Swedish (sv)
Other versions
FI881544A0 (fi
FI93749B (fi
FI881544A (fi
Inventor
Michel Devic
Jacques Kervennal
Jean-Pierre Schirmann
Original Assignee
Atochem Elf Sa
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 Atochem Elf Sa filed Critical Atochem Elf Sa
Publication of FI881544A0 publication Critical patent/FI881544A0/fi
Publication of FI881544A publication Critical patent/FI881544A/fi
Application granted granted Critical
Publication of FI93749B publication Critical patent/FI93749B/fi
Publication of FI93749C publication Critical patent/FI93749C/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
    • D21C9/1005—Pretreatment of the pulp, e.g. degassing the pulp

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Detergent Compositions (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Dental Preparations (AREA)
  • Seasonings (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Glass Compositions (AREA)
  • Noodles (AREA)
FI881544A 1987-04-02 1988-03-31 Menetelmä mekaanisen massan valmistamiseksi FI93749C (fi)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8704844 1987-04-02
FR8704844A FR2613388B1 (fr) 1987-04-02 1987-04-02 Procede de blanchiment de pates

Publications (4)

Publication Number Publication Date
FI881544A0 FI881544A0 (fi) 1988-03-31
FI881544A FI881544A (fi) 1988-10-03
FI93749B FI93749B (fi) 1995-02-15
FI93749C true FI93749C (fi) 1995-05-26

Family

ID=9349862

Family Applications (1)

Application Number Title Priority Date Filing Date
FI881544A FI93749C (fi) 1987-04-02 1988-03-31 Menetelmä mekaanisen massan valmistamiseksi

Country Status (11)

Country Link
EP (1) EP0285530B1 (fr)
JP (1) JPS63256786A (fr)
AT (1) ATE84581T1 (fr)
AU (1) AU606930B2 (fr)
CA (1) CA1310797C (fr)
DE (2) DE3877403T2 (fr)
ES (1) ES2004846T3 (fr)
FI (1) FI93749C (fr)
FR (1) FR2613388B1 (fr)
NO (1) NO173886C (fr)
NZ (1) NZ224144A (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2647641B1 (fr) * 1989-06-05 1992-01-17 Atochem Procede de fabrication de pulpes vegetales blanchies
SE467006B (sv) 1989-06-06 1992-05-11 Eka Nobel Ab Blekning av kemisk massa med peroxid varvid massan foerst behandlas med en komplexbildare
ATE97179T1 (de) * 1989-06-06 1993-11-15 Eka Nobel Ab Verfahren zum bleichen von lignocellulose enthaltenden zellstoffen.
FR2659363B1 (fr) * 1990-03-07 1996-04-19 Atochem Procede de preparation de pates a haut rendement blanchies.
SE466061B (sv) * 1990-04-23 1991-12-09 Eka Nobel Ab Blekning av kemisk massa genom behandling med foerst ett komplexbildande aemne och sedan ett peroxidinnehaallande aemne
SE9001481L (sv) * 1990-04-23 1991-10-24 Eka Nobel Ab Reduktion av halogenorganiska foereningar i blekeriavlopp
FR2661430B1 (fr) * 1990-04-30 1992-07-17 Atochem Procede de blanchiment au peroxyde d'hydrogene de pates a papier a haut rendement.
FR2661431B1 (fr) * 1990-04-30 1992-07-17 Atochem Procede de blanchiment au peroxyde de l'hydrogene de pates a papier a haut rendement.
SE468355B (sv) * 1991-04-30 1992-12-21 Eka Nobel Ab Blekning av kemisk massa genom behandling med komplexbildare och ozon
ZA955290B (en) * 1994-07-11 1996-12-27 Ingersoll Rand Co Peroxide bleaching process for cellulosic and lignocellulosic material
AU2003279120A1 (en) * 2003-10-02 2005-05-19 Andritz Inc. Multi-stage ap mechanical pulping with refiner flow line treatment
US8298373B2 (en) 2008-02-07 2012-10-30 University Of New Brunswick Combined process of peroxide bleaching of wood pulps and addition of optical brightening agents

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL202075A (fr) * 1954-11-19 Fmc Corp
US3251731A (en) * 1963-02-11 1966-05-17 Andrew J Gard Bleaching of wood pulp with a sequestering agent and hydrogen peroxide
JPS5344563A (en) * 1976-10-05 1978-04-21 Ouchi Shinkou Kagaku Kougiyou Preparation of benzothiazolylsulfenamide
FI61215B (fi) * 1976-11-23 1982-02-26 Defibrator Ab Saett och anordning att kontinuerligt framstaella lignocellulosahaltiga fibermaterial

Also Published As

Publication number Publication date
NO881404D0 (no) 1988-03-29
ES2004846A4 (es) 1989-02-16
DE3877403T2 (de) 1993-05-19
EP0285530A1 (fr) 1988-10-05
AU1406788A (en) 1988-10-06
DE285530T1 (de) 1989-03-30
EP0285530B1 (fr) 1993-01-13
ATE84581T1 (de) 1993-01-15
JPH0156197B2 (fr) 1989-11-29
ES2004846T3 (es) 1993-06-16
NZ224144A (en) 1989-07-27
NO173886B (no) 1993-11-08
AU606930B2 (en) 1991-02-21
DE3877403D1 (de) 1993-02-25
FR2613388A1 (fr) 1988-10-07
JPS63256786A (ja) 1988-10-24
CA1310797C (fr) 1992-12-01
NO881404L (no) 1988-10-03
NO173886C (no) 1994-02-16
FI881544A0 (fi) 1988-03-31
FI93749B (fi) 1995-02-15
FI881544A (fi) 1988-10-03
FR2613388B1 (fr) 1990-05-04

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Legal Events

Date Code Title Description
HC Name/ company changed in application

Owner name: ELF ATOCHEM S.A.

BB Publication of examined application
MM Patent lapsed

Owner name: ELF ATOCHEM S.A.