NZ224144A - Pulp bleaching process - Google Patents

Pulp bleaching process

Info

Publication number
NZ224144A
NZ224144A NZ224144A NZ22414488A NZ224144A NZ 224144 A NZ224144 A NZ 224144A NZ 224144 A NZ224144 A NZ 224144A NZ 22414488 A NZ22414488 A NZ 22414488A NZ 224144 A NZ224144 A NZ 224144A
Authority
NZ
New Zealand
Prior art keywords
bleaching process
pulp bleaching
action
pulp
temperature
Prior art date
Application number
NZ224144A
Inventor
M Devic
J Kervennal
J-P 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 NZ224144A publication Critical patent/NZ224144A/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)
  • Treatment Of Fiber Materials (AREA)
  • Dental Preparations (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Glass Compositions (AREA)
  • Seasonings (AREA)
  • Noodles (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.
NZ224144A 1987-04-02 1988-04-06 Pulp bleaching process NZ224144A (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 (1)

Publication Number Publication Date
NZ224144A true NZ224144A (en) 1989-07-27

Family

ID=9349862

Family Applications (1)

Application Number Title Priority Date Filing Date
NZ224144A NZ224144A (en) 1987-04-02 1988-04-06 Pulp bleaching process

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
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
DE402335T1 (en) * 1989-06-06 1992-04-09 Eka Nobel Ab, Surte, Se METHOD FOR BLEACHING LIGNOCELLULOSE-CONTAINING CELLS.
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
JP4580343B2 (en) * 2003-10-02 2010-11-10 アンドリッツ インコーポレーテッド Multi-stage mechanical pulping method using alkaline peroxide with refiner blow 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 (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
GB1590704A (en) * 1976-11-23 1981-06-10 Defibrator Ab Method end device for the continuous production of pulp from fibrous lignocellulosic materials

Also Published As

Publication number Publication date
FI881544A0 (en) 1988-03-31
NO881404L (en) 1988-10-03
ES2004846A4 (en) 1989-02-16
AU1406788A (en) 1988-10-06
NO173886B (en) 1993-11-08
NO881404D0 (en) 1988-03-29
DE285530T1 (en) 1989-03-30
FI93749B (en) 1995-02-15
FR2613388B1 (en) 1990-05-04
NO173886C (en) 1994-02-16
DE3877403T2 (en) 1993-05-19
JPH0156197B2 (en) 1989-11-29
EP0285530B1 (en) 1993-01-13
JPS63256786A (en) 1988-10-24
ATE84581T1 (en) 1993-01-15
FR2613388A1 (en) 1988-10-07
AU606930B2 (en) 1991-02-21
FI93749C (en) 1995-05-26
CA1310797C (en) 1992-12-01
EP0285530A1 (en) 1988-10-05
FI881544A (en) 1988-10-03
ES2004846T3 (en) 1993-06-16
DE3877403D1 (en) 1993-02-25

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