ATE239828T1 - METHOD FOR IMPROVING THE OPACITY OF MECHANICAL PULP BY USING ALIPHATIC PEROXY ACIDS AND USE OF PEROXY ACIDS TO IMPROVE OPACITY - Google Patents

METHOD FOR IMPROVING THE OPACITY OF MECHANICAL PULP BY USING ALIPHATIC PEROXY ACIDS AND USE OF PEROXY ACIDS TO IMPROVE OPACITY

Info

Publication number
ATE239828T1
ATE239828T1 AT00936926T AT00936926T ATE239828T1 AT E239828 T1 ATE239828 T1 AT E239828T1 AT 00936926 T AT00936926 T AT 00936926T AT 00936926 T AT00936926 T AT 00936926T AT E239828 T1 ATE239828 T1 AT E239828T1
Authority
AT
Austria
Prior art keywords
opacity
peroxy acids
improving
mechanical pulp
improve
Prior art date
Application number
AT00936926T
Other languages
German (de)
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
Application granted granted Critical
Publication of ATE239828T1 publication Critical patent/ATE239828T1/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)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (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.
AT00936926T 1999-06-15 2000-06-14 METHOD FOR IMPROVING THE OPACITY OF MECHANICAL PULP BY USING ALIPHATIC PEROXY ACIDS AND USE OF PEROXY ACIDS TO IMPROVE OPACITY ATE239828T1 (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 (1)

Publication Number Publication Date
ATE239828T1 true ATE239828T1 (en) 2003-05-15

Family

ID=8554886

Family Applications (1)

Application Number Title Priority Date Filing Date
AT00936926T ATE239828T1 (en) 1999-06-15 2000-06-14 METHOD FOR IMPROVING THE OPACITY OF MECHANICAL PULP BY USING ALIPHATIC PEROXY ACIDS AND USE OF PEROXY 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 board manufacturing process
GB2391011A (en) * 2002-07-19 2004-01-28 Crosmill Ltd Bleaching cellulose suspensions
MX2011000752A (en) 2008-07-30 2011-03-21 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 A process for treating pulp
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
FI991366A0 (en) 1999-06-15
ES2193085T3 (en) 2003-11-01
EP1244851B1 (en) 2003-05-07
NO20016083L (en) 2002-02-14
FI991366A (en) 2000-12-16
AU5224500A (en) 2001-01-02
EP1244851A1 (en) 2002-10-02
WO2000077301A1 (en) 2000-12-21
DE60002613T2 (en) 2003-11-27
CA2374673A1 (en) 2000-12-21
FI107545B (en) 2001-08-31
NO20016083D0 (en) 2001-12-13
DE60002613D1 (en) 2003-06-12

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