NO881404D0 - WHITE MECHANICAL TREMASS. - Google Patents

WHITE MECHANICAL TREMASS.

Info

Publication number
NO881404D0
NO881404D0 NO881404A NO881404A NO881404D0 NO 881404 D0 NO881404 D0 NO 881404D0 NO 881404 A NO881404 A NO 881404A NO 881404 A NO881404 A NO 881404A NO 881404 D0 NO881404 D0 NO 881404D0
Authority
NO
Norway
Prior art keywords
tremass
mechanical
white
white mechanical
action
Prior art date
Application number
NO881404A
Other languages
Norwegian (no)
Other versions
NO173886C (en
NO881404L (en
NO173886B (en
Inventor
Michel Devic
Jacques Kervennal
Jean-Pierre Schirmann
Original Assignee
Atochem
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 filed Critical Atochem
Publication of NO881404D0 publication Critical patent/NO881404D0/en
Publication of NO881404L publication Critical patent/NO881404L/en
Publication of NO173886B publication Critical patent/NO173886B/en
Publication of NO173886C publication Critical patent/NO173886C/en

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)
  • Dental Preparations (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Noodles (AREA)
  • Seasonings (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Glass Compositions (AREA)

Abstract

Bleaching of pulps of mechanical origin in which the pulp is treated with a metal-complexing or sequestering agent and is then washed with an efficiency higher than 95 % before being subjected to the action of hydrogen peroxide at a temperature above 100 DEG C and not exceeding 250 DEG C at the pressure of steam at the said temperature for 1 to 30 minutes, not conjointly with a mechanical beating action.
NO881404A 1987-04-02 1988-03-29 Procedure for bleaching mechanical wood pulp NO173886C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8704844A FR2613388B1 (en) 1987-04-02 1987-04-02 PROCESS FOR BLEACHING PASTA

Publications (4)

Publication Number Publication Date
NO881404D0 true NO881404D0 (en) 1988-03-29
NO881404L NO881404L (en) 1988-10-03
NO173886B NO173886B (en) 1993-11-08
NO173886C NO173886C (en) 1994-02-16

Family

ID=9349862

Family Applications (1)

Application Number Title Priority Date Filing Date
NO881404A NO173886C (en) 1987-04-02 1988-03-29 Procedure for bleaching mechanical wood pulp

Country Status (11)

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

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2647641B1 (en) * 1989-06-05 1992-01-17 Atochem PROCESS FOR THE MANUFACTURE OF BLEACHED VEGETABLE PULPES
DK0402335T4 (en) * 1989-06-06 2001-06-25 Eka Chemicals Ab Method for bleaching lignocellulosic pulp
SE467006B (en) 1989-06-06 1992-05-11 Eka Nobel Ab Bleaching chemical pulp with peroxide, with the pulp first being treated with a sequestering agent
FR2659363B1 (en) * 1990-03-07 1996-04-19 Atochem PROCESS FOR THE PREPARATION OF HIGHLY YIELDED PASTA.
SE9001481L (en) * 1990-04-23 1991-10-24 Eka Nobel Ab REDUCTION OF HALOGEN ORGANIC SUBSTANCES IN BLEACHING WASTE
SE466061B (en) * 1990-04-23 1991-12-09 Eka Nobel Ab Bleaching of chemical pulp by treatment with first a complexing agent and then a peroxide containing substance
FR2661430B1 (en) * 1990-04-30 1992-07-17 Atochem HIGH-YIELD PAPER PULP HYDROGEN PEROXIDE BLEACHING PROCESS.
FR2661431B1 (en) * 1990-04-30 1992-07-17 Atochem HIGH-YIELD PAPER PULP HYDROGEN PEROXIDE BLEACHING PROCESS.
SE468355B (en) * 1991-04-30 1992-12-21 Eka Nobel Ab CHEMISTRY OF CHEMICAL MASS THROUGH TREATMENT WITH COMPLEX PICTURES AND OZONE
ZA955290B (en) * 1994-07-11 1996-12-27 Ingersoll Rand Co Peroxide bleaching process for cellulosic and lignocellulosic material
SE0950616L (en) * 2003-10-02 2009-08-27 Andritz Inc Multi-stage production of mechanical pulp with AP through blast line treatment with refiner
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 (en) * 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 (en) * 1976-11-23 1982-02-26 Defibrator Ab SAFETY RANGE OF CONTAINER FRAMSTAELLA LIGNOCELLULOSAHALTIGA FIBERMATERIAL

Also Published As

Publication number Publication date
DE3877403D1 (en) 1993-02-25
NZ224144A (en) 1989-07-27
NO173886C (en) 1994-02-16
JPH0156197B2 (en) 1989-11-29
EP0285530A1 (en) 1988-10-05
DE285530T1 (en) 1989-03-30
AU1406788A (en) 1988-10-06
ATE84581T1 (en) 1993-01-15
NO881404L (en) 1988-10-03
FI881544A0 (en) 1988-03-31
AU606930B2 (en) 1991-02-21
EP0285530B1 (en) 1993-01-13
FR2613388A1 (en) 1988-10-07
JPS63256786A (en) 1988-10-24
FI881544A (en) 1988-10-03
NO173886B (en) 1993-11-08
ES2004846T3 (en) 1993-06-16
FI93749B (en) 1995-02-15
CA1310797C (en) 1992-12-01
DE3877403T2 (en) 1993-05-19
FI93749C (en) 1995-05-26
FR2613388B1 (en) 1990-05-04
ES2004846A4 (en) 1989-02-16

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