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DE69725558D1 - METHOD FOR TREATING CHEMICAL CELLULAR - Google Patents

METHOD FOR TREATING CHEMICAL CELLULAR

Info

Publication number
DE69725558D1
DE69725558D1 DE69725558T DE69725558T DE69725558D1 DE 69725558 D1 DE69725558 D1 DE 69725558D1 DE 69725558 T DE69725558 T DE 69725558T DE 69725558 T DE69725558 T DE 69725558T DE 69725558 D1 DE69725558 D1 DE 69725558D1
Authority
DE
Germany
Prior art keywords
pulp
treating chemical
delignification
chelating agent
chemical cellular
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
DE69725558T
Other languages
German (de)
Other versions
DE69725558T2 (en
Inventor
Ilkka Renvall
Reijo Aksela
Aarto Paren
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kemira Oyj
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8545485&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE69725558(D1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Kemira Chemicals Oy filed Critical Kemira Chemicals Oy
Application granted granted Critical
Publication of DE69725558D1 publication Critical patent/DE69725558D1/en
Publication of DE69725558T2 publication Critical patent/DE69725558T2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • 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

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Treatment Of Fiber Materials (AREA)

Abstract

A process for the bleaching or delignification of chemical pulp, wherein, before bleaching or delignification with an oxygen chemical, the pulp is pretreated with a chelating agent in order to eliminate the adverse effects of any heavy metals present in the pulp. The chelating agent used consists of compounds according to Formula (I), where n is 1-3, m is 0-3, p is 1-3, R1, R2, R3 and R4 are H, Na, K, Ca or Mg, R5 and R6 are H, CH2OH, CH2CH2OH or CH2O(CH2CH2O)1-10CH2CH2OH.
DE69725558T 1996-02-19 1997-02-19 METHOD FOR TREATING CHEMICAL CELLULAR Expired - Lifetime DE69725558T2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FI960756A FI115469B (en) 1996-02-19 1996-02-19 Process for the treatment of chemical cellulose material
FI960756 1996-02-19
PCT/FI1997/000106 WO1997030208A1 (en) 1996-02-19 1997-02-19 Process for the treatment of chemical pulp

Publications (2)

Publication Number Publication Date
DE69725558D1 true DE69725558D1 (en) 2003-11-20
DE69725558T2 DE69725558T2 (en) 2004-08-05

Family

ID=8545485

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69725558T Expired - Lifetime DE69725558T2 (en) 1996-02-19 1997-02-19 METHOD FOR TREATING CHEMICAL CELLULAR

Country Status (6)

Country Link
EP (1) EP0882151B1 (en)
AT (1) ATE252176T1 (en)
AU (1) AU1797397A (en)
DE (1) DE69725558T2 (en)
FI (1) FI115469B (en)
WO (1) WO1997030208A1 (en)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19630278A1 (en) * 1996-07-26 1998-01-29 Basf Ag Complexing agent for pulp and pulp bleaching, paper production and deinking of waste paper
EP1036237A1 (en) * 1997-11-25 2000-09-20 Amylum Europe N.V. Improvements to the bleaching process for chemical pulp and intermediate pulp dispersions
KR100260833B1 (en) * 1997-12-27 2000-07-01 차동천 Method of manufacturing high yield mechanical pulp
FI106258B (en) 1998-03-09 2000-12-29 Kemira Chemicals Oy Processes for the preparation of an N-bis- [2- (1,2-dicarboxyethoxy) ethyl] amine derivative and products obtained by the methods and uses thereof
BE1011784A3 (en) * 1998-03-10 2000-01-11 Solvay Bleaching pulp process.
BE1011785A3 (en) * 1998-03-10 2000-01-11 Solvay Process for laundering and / or pasta delignification paper chemicals.
ES2209420T3 (en) 1998-04-17 2004-06-16 Alberta Research Council, Inc. LIGNOCELLULOSIC PULP PRODUCTION METHOD FROM NON-WOOD SPECIES.
FI991241L (en) * 1999-06-01 2000-12-02 Aga Ab Lignin bleaching and method for making paper
GB2391011A (en) * 2002-07-19 2004-01-28 Crosmill Ltd Bleaching cellulose suspensions
CA2728278C (en) 2008-06-20 2016-06-28 Zheng Tan Composition and recording sheet with improved optical properties
GB0901207D0 (en) * 2009-01-26 2009-03-11 Innospec Ltd Chelating agents and methods relating thereto
US9511167B2 (en) 2009-05-28 2016-12-06 Gp Cellulose Gmbh Modified cellulose from chemical kraft fiber and methods of making and using the same
US9512237B2 (en) 2009-05-28 2016-12-06 Gp Cellulose Gmbh Method for inhibiting the growth of microbes with a modified cellulose fiber
CA2949518C (en) 2009-05-28 2019-01-08 Gp Cellulose Gmbh Modified cellulose from chemical kraft fiber and methods of making and using the same
US9512563B2 (en) 2009-05-28 2016-12-06 Gp Cellulose Gmbh Surface treated modified cellulose from chemical kraft fiber and methods of making and using same
SE534885C2 (en) * 2009-11-11 2012-01-31 Metso Paper Inc Process for producing a pulp from lignocellulosic material containing at least 0.5% SiO2
AU2014229520B2 (en) * 2013-03-14 2017-09-21 Gp Cellulose Gmbh A method of making highly functional, low viscosity kraft fiber using an acidic bleaching sequence and a fiber made by the process
CA2901915A1 (en) 2013-03-15 2014-09-18 Gp Cellulose Gmbh A low viscosity kraft fiber having an enhanced carboxyl content and methods of making and using the same
WO2015138335A1 (en) * 2014-03-12 2015-09-17 Gp Cellulose Gmbh A low viscosity kraft fiber having an enhanced carboxyl content and methods of making and using the same
EP3541849B1 (en) 2016-11-16 2023-11-15 GP Cellulose GmbH Modified cellulose from chemical fiber and methods of making and using the same
CZ309643B6 (en) * 2021-07-21 2023-06-07 Univerzita Pardubice Magnesium salts of aspartic acid derivatives and their use as hydrogen peroxide stabilizers

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5362412A (en) * 1991-04-17 1994-11-08 Hampshire Chemical Corp. Biodegradable bleach stabilizers for detergents
GB9216408D0 (en) * 1992-08-01 1992-09-16 Procter & Gamble Stabilized bleaching compositions
DE4340043A1 (en) * 1993-11-24 1995-06-01 Henkel Kgaa Use of nitrogen-containing complexing agents in wood pulp bleaching
DE4445931A1 (en) * 1994-12-22 1996-06-27 Basf Ag Use of hydroxyalkylaminocarboxylic acids as complexing agents

Also Published As

Publication number Publication date
DE69725558T2 (en) 2004-08-05
FI115469B (en) 2005-05-13
ATE252176T1 (en) 2003-11-15
AU1797397A (en) 1997-09-02
EP0882151A1 (en) 1998-12-09
FI960756A0 (en) 1996-02-19
WO1997030208A1 (en) 1997-08-21
FI960756L (en) 1997-08-20
EP0882151B1 (en) 2003-10-15

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Legal Events

Date Code Title Description
8327 Change in the person/name/address of the patent owner

Owner name: KEMIRA OYJ, HELSINKI, FI

8363 Opposition against the patent
8365 Fully valid after opposition proceedings