ZA948562B - Process for bleaching a chemical paper pulp - Google Patents

Process for bleaching a chemical paper pulp

Info

Publication number
ZA948562B
ZA948562B ZA948562A ZA948562A ZA948562B ZA 948562 B ZA948562 B ZA 948562B ZA 948562 A ZA948562 A ZA 948562A ZA 948562 A ZA948562 A ZA 948562A ZA 948562 B ZA948562 B ZA 948562B
Authority
ZA
South Africa
Prior art keywords
bleaching
paper pulp
chemical paper
pulp
chemical
Prior art date
Application number
ZA948562A
Other languages
English (en)
Inventor
Francois Desprez
Nicholas A Troughton
Johan Devenyns
Original Assignee
Solvay Interox
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=3887524&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=ZA948562(B) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Solvay Interox filed Critical Solvay Interox
Publication of ZA948562B publication Critical patent/ZA948562B/xx

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
    • 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
    • D21C9/1026—Other features in bleaching processes
    • D21C9/1042—Use of chelating agents
    • 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)
  • Paper (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
ZA948562A 1993-11-04 1994-10-31 Process for bleaching a chemical paper pulp ZA948562B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE9301215A BE1007700A3 (fr) 1993-11-04 1993-11-04 Procede pour le blanchiment d'une pate a papier chimique.

Publications (1)

Publication Number Publication Date
ZA948562B true ZA948562B (en) 1995-06-30

Family

ID=3887524

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA948562A ZA948562B (en) 1993-11-04 1994-10-31 Process for bleaching a chemical paper pulp

Country Status (15)

Country Link
EP (1) EP0726979B1 (xx)
JP (1) JPH09507096A (xx)
AT (1) ATE166118T1 (xx)
AU (1) AU7994094A (xx)
BE (1) BE1007700A3 (xx)
BR (1) BR9407976A (xx)
CA (1) CA2175817A1 (xx)
DE (1) DE69410286T2 (xx)
ES (1) ES2119234T3 (xx)
FI (1) FI961895A (xx)
MA (1) MA23365A1 (xx)
NO (1) NO961817L (xx)
NZ (1) NZ274852A (xx)
WO (1) WO1995012709A1 (xx)
ZA (1) ZA948562B (xx)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1007757A3 (fr) * 1993-11-10 1995-10-17 Solvay Interox Procede pour le blanchiment d'une pate a papier chimique.
FI105701B (fi) * 1995-10-20 2000-09-29 Ahlstrom Machinery Oy Menetelmä ja laitteisto massan käsittelemiseksi

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2582692B1 (fr) * 1985-05-29 1987-12-11 Atochem Traitement de pates papetieres chimiques par le peroxyde d'hydrogene en vue de leur blanchiment
DE69004492T3 (de) * 1989-06-06 2001-11-15 Eka Nobel Ab Verfahren zum Bleichen von Lignocellulose enthaltenden Zellstoffen.
FR2655668B1 (fr) * 1989-12-11 1995-06-09 Du Pin Cellulose Procede de blanchiment de pates cellulosiques chimiques.

Also Published As

Publication number Publication date
DE69410286D1 (de) 1998-06-18
MA23365A1 (fr) 1995-07-01
NO961817D0 (no) 1996-05-03
ATE166118T1 (de) 1998-05-15
DE69410286T2 (de) 1998-12-10
AU7994094A (en) 1995-05-23
FI961895A0 (fi) 1996-05-03
ES2119234T3 (es) 1998-10-01
NZ274852A (en) 1997-04-24
WO1995012709A1 (fr) 1995-05-11
CA2175817A1 (fr) 1995-05-11
EP0726979A1 (fr) 1996-08-21
EP0726979B1 (fr) 1998-05-13
JPH09507096A (ja) 1997-07-15
BE1007700A3 (fr) 1995-10-03
NO961817L (no) 1996-05-03
BR9407976A (pt) 1996-12-03
FI961895A (fi) 1996-05-03

Similar Documents

Publication Publication Date Title
HK1040692A1 (en) Process for producing purified aqueous hydrogen peroxide solution and apparatus.
GB9815042D0 (en) Detector
TW342353B (en) Process for the regeneration of catalysts
MY109361A (en) Integrated pulping process of waste paper yielding tissue-grade paper fibers
NO895234L (no) Hydrogenperoksyd-blekeprosess.
IN189584B (xx)
AR243848A1 (es) Procedimiento para la estabilizacion de soluciones de peroxido de hidrogeno acuosas levemente alcalinas diluidas.
AU7605691A (en) Process for bleaching high-yield paper pulps with hydrogen peroxide
ZA948562B (en) Process for bleaching a chemical paper pulp
AU7607191A (en) Process for bleaching high-yield paper pulps with hydrogen peroxide
CS116691A3 (en) Process for preparing solutions containing alkyltetrahydro-anthrahydroquinones and process for preparing hydrogen peroxide therefrom
ZA957070B (en) Pulp bleaching
AU4119389A (en) Process for leaching noble metals using a leaching solution containing cyanide, and hydrogen peroxide
MX9602927A (es) Procedimiento para blanquear pasta pulpa kraft.
NO953440L (no) Fremgangsmåte for delignifisering av kjemisk papirmasse
FI961975A0 (fi) Menetelmän kemiallisen paperimassan valkaisemiseksi
CA2179961A1 (en) Method for the treatment of waste water
CA2089041A1 (en) Bleaching pulp with chloric acid
TH18764EX (th) กรรมวิธีสำหรับฟอกจางเยื่อกระดาษทางเคมี
ZA901352B (en) Process for destroying hypochlorites in a solution of perchlorate
TH18764A (th) กรรมวิธีสำหรับฟอกจางเยื่อกระดาษทางเคมี
CS473190A3 (en) Process for washing and dewatering waste sediments, particularly containing residual metals