SE8700569D0 - AN IMPROVED PEROXIDE BLEACHING METHOD - Google Patents

AN IMPROVED PEROXIDE BLEACHING METHOD

Info

Publication number
SE8700569D0
SE8700569D0 SE8700569A SE8700569A SE8700569D0 SE 8700569 D0 SE8700569 D0 SE 8700569D0 SE 8700569 A SE8700569 A SE 8700569A SE 8700569 A SE8700569 A SE 8700569A SE 8700569 D0 SE8700569 D0 SE 8700569D0
Authority
SE
Sweden
Prior art keywords
acid
pulp
peroxide bleaching
bleaching method
suspension
Prior art date
Application number
SE8700569A
Other languages
Swedish (sv)
Inventor
Josef Kubat
Lars Magnus Qvist
Original Assignee
Josef Kubat
Lars Magnus Qvist
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 Josef Kubat, Lars Magnus Qvist filed Critical Josef Kubat
Priority to SE8700569A priority Critical patent/SE8700569D0/en
Publication of SE8700569D0 publication Critical patent/SE8700569D0/en
Priority to AT88901957T priority patent/ATE83016T1/en
Priority to EP88901957A priority patent/EP0348411B1/en
Priority to DE8888901957T priority patent/DE3876429T2/en
Priority to PCT/SE1988/000055 priority patent/WO1988006202A1/en
Priority to FI893742A priority patent/FI91545C/en
Priority to CA000612006A priority patent/CA1333650C/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
    • D21C9/16—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)
  • Detergent Compositions (AREA)

Abstract

A method for bleaching wood pulp without the use of peroxy acids by means of from 0.1 to 10 %, based on the dry weight of the pulp, of hydrogen peroxide characterized in that an organic acid selected from the group formic acid, acetic acid, lactic acid, maleic acid and phtalic acid or any mixture thereof is added together with such an amount of an alkali hydroxide to the pulp suspension to be bleached as to give a pH-value of the suspension within the alkaline range of from 8.0 to 13.
SE8700569A 1987-02-12 1987-02-12 AN IMPROVED PEROXIDE BLEACHING METHOD SE8700569D0 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
SE8700569A SE8700569D0 (en) 1987-02-12 1987-02-12 AN IMPROVED PEROXIDE BLEACHING METHOD
AT88901957T ATE83016T1 (en) 1987-02-12 1988-02-12 PEROXIDE BLEACHING PROCESS.
EP88901957A EP0348411B1 (en) 1987-02-12 1988-02-12 An improved peroxide bleaching method
DE8888901957T DE3876429T2 (en) 1987-02-12 1988-02-12 PEROXIDE BLEACHING METHOD.
PCT/SE1988/000055 WO1988006202A1 (en) 1987-02-12 1988-02-12 An improved peroxide bleaching method
FI893742A FI91545C (en) 1987-02-12 1989-08-08 Improved peroxide bleaching process
CA000612006A CA1333650C (en) 1987-02-12 1989-09-19 Peroxide bleaching method

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8700569A SE8700569D0 (en) 1987-02-12 1987-02-12 AN IMPROVED PEROXIDE BLEACHING METHOD
CA000612006A CA1333650C (en) 1987-02-12 1989-09-19 Peroxide bleaching method

Publications (1)

Publication Number Publication Date
SE8700569D0 true SE8700569D0 (en) 1987-02-12

Family

ID=25673050

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8700569A SE8700569D0 (en) 1987-02-12 1987-02-12 AN IMPROVED PEROXIDE BLEACHING METHOD

Country Status (7)

Country Link
EP (1) EP0348411B1 (en)
AT (1) ATE83016T1 (en)
CA (1) CA1333650C (en)
DE (1) DE3876429T2 (en)
FI (1) FI91545C (en)
SE (1) SE8700569D0 (en)
WO (1) WO1988006202A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE505980C2 (en) * 1993-12-23 1997-10-27 Bim Kemi Ab Ways to prevent peroxide-degrading enzymes by bleaching with hydrogen peroxide
DE19516151A1 (en) * 1995-05-03 1996-11-07 Sven Siegle Process for the production of a pulp from cellulosic material, the pulp itself and its use
FI115641B (en) * 1996-02-19 2005-06-15 Kemira Oyj Bleaching process for high yields
FI115470B (en) * 1996-02-19 2005-05-13 Kemira Oyj Process for the treatment of chemical cellulose material

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO109292C (en) * 1962-07-16
DE2219505C3 (en) * 1972-04-21 1974-10-17 Deutsche Gold- Und Silber-Scheideanstalt Vormals Roessler, 6000 Frankfurt Chlorine-free multi-stage bleaching of cellulose

Also Published As

Publication number Publication date
FI91545B (en) 1994-03-31
DE3876429D1 (en) 1993-01-14
CA1333650C (en) 1994-12-27
FI893742A0 (en) 1989-08-08
FI91545C (en) 1994-07-11
WO1988006202A1 (en) 1988-08-25
EP0348411B1 (en) 1992-12-02
EP0348411A1 (en) 1990-01-03
ATE83016T1 (en) 1992-12-15
DE3876429T2 (en) 1993-07-01

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