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NO20016083L - Process for Improving Opacity of Wood Pulp Using Aliphatic Peroxic Acids and Using Peroxic Acids to Improve Opacity - Google Patents

Process for Improving Opacity of Wood Pulp Using Aliphatic Peroxic Acids and Using Peroxic Acids to Improve Opacity

Info

Publication number
NO20016083L
NO20016083L NO20016083A NO20016083A NO20016083L NO 20016083 L NO20016083 L NO 20016083L NO 20016083 A NO20016083 A NO 20016083A NO 20016083 A NO20016083 A NO 20016083A NO 20016083 L NO20016083 L NO 20016083L
Authority
NO
Norway
Prior art keywords
peroxic
acids
opacity
aliphatic
wood pulp
Prior art date
Application number
NO20016083A
Other languages
Norwegian (no)
Other versions
NO20016083D0 (en
Inventor
Jukka Jaekaerae
Aarto Paren
Original Assignee
Kemira Chemicals Oy
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 Kemira Chemicals Oy filed Critical Kemira Chemicals Oy
Publication of NO20016083D0 publication Critical patent/NO20016083D0/en
Publication of NO20016083L publication Critical patent/NO20016083L/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
    • D21C9/166—Bleaching ; Apparatus therefor with per compounds with peracids
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
    • D21H11/16—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only modified by a particular after-treatment

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)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)

Abstract

The invention relates to a method for treating mechanical pulp so that aliphatic percarboxylic acid in the amount of 0.5 - 5 kg/ton of pulp is added to the pulp to improve the opacity.
NO20016083A 1999-06-15 2001-12-13 Process for Improving Opacity of Wood Pulp Using Aliphatic Peroxic Acids and Using Peroxic Acids to Improve Opacity NO20016083L (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI991366A FI107545B (en) 1999-06-15 1999-06-15 Process for processing mechanical masses
PCT/FI2000/000532 WO2000077301A1 (en) 1999-06-15 2000-06-14 Method to improve the opacity of mechanical pulp by using aliphatic peroxyacids and use of peroxyacids to improve opacity

Publications (2)

Publication Number Publication Date
NO20016083D0 NO20016083D0 (en) 2001-12-13
NO20016083L true NO20016083L (en) 2002-02-14

Family

ID=8554886

Family Applications (1)

Application Number Title Priority Date Filing Date
NO20016083A NO20016083L (en) 1999-06-15 2001-12-13 Process for Improving Opacity of Wood Pulp Using Aliphatic Peroxic Acids and Using Peroxic Acids to Improve Opacity

Country Status (9)

Country Link
EP (1) EP1244851B1 (en)
AT (1) ATE239828T1 (en)
AU (1) AU5224500A (en)
CA (1) CA2374673A1 (en)
DE (1) DE60002613T2 (en)
ES (1) ES2193085T3 (en)
FI (1) FI107545B (en)
NO (1) NO20016083L (en)
WO (1) WO2000077301A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI111745B (en) 2001-12-19 2003-09-15 Kemira Chemicals Oy Improved process for making cardboard
GB2391011A (en) * 2002-07-19 2004-01-28 Crosmill Ltd Bleaching cellulose suspensions
WO2010014085A1 (en) 2008-07-30 2010-02-04 Micro Motion, Inc. Method and apparatus for pulse width modulation signal processing
FI127444B (en) * 2015-05-27 2018-06-15 Kemira Oyj Method for reducing pulp viscosity in production of dissolving pulp
FI127996B (en) * 2016-07-01 2019-07-15 Kemira Oyj Process for treating cellulose
WO2019048698A1 (en) * 2017-09-11 2019-03-14 Kemira Oyj Process for treating pulp

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1119546A (en) * 1965-03-01 1968-07-10 Paper Chemistry Inst Improved method of treating fibrous material
US5589032A (en) * 1992-09-21 1996-12-31 North Carolina State University Process for preparing a bleaching liquor containing percarboxylic acid and caro's acid
WO1997022749A1 (en) * 1995-12-19 1997-06-26 Kvaerner Hymac Inc. Process for treating refiner pulp

Also Published As

Publication number Publication date
FI107545B (en) 2001-08-31
CA2374673A1 (en) 2000-12-21
AU5224500A (en) 2001-01-02
FI991366L (en) 2000-12-16
DE60002613D1 (en) 2003-06-12
NO20016083D0 (en) 2001-12-13
DE60002613T2 (en) 2003-11-27
ES2193085T3 (en) 2003-11-01
EP1244851A1 (en) 2002-10-02
ATE239828T1 (en) 2003-05-15
FI991366A0 (en) 1999-06-15
EP1244851B1 (en) 2003-05-07
WO2000077301A1 (en) 2000-12-21

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Legal Events

Date Code Title Description
FC2A Withdrawal, rejection or dismissal of laid open patent application