DE69606346D1 - Ethylene diamine triacetic acid and its salts as chelating agents for bleaching pulp - Google Patents

Ethylene diamine triacetic acid and its salts as chelating agents for bleaching pulp

Info

Publication number
DE69606346D1
DE69606346D1 DE69606346T DE69606346T DE69606346D1 DE 69606346 D1 DE69606346 D1 DE 69606346D1 DE 69606346 T DE69606346 T DE 69606346T DE 69606346 T DE69606346 T DE 69606346T DE 69606346 D1 DE69606346 D1 DE 69606346D1
Authority
DE
Germany
Prior art keywords
salts
chelating agents
ethylene diamine
triacetic acid
bleaching pulp
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 - Fee Related
Application number
DE69606346T
Other languages
German (de)
Other versions
DE69606346T2 (en
Inventor
Brian A Parker
Roland J Lemery
David T Johns
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.)
Hampshire Chemical Corp
Original Assignee
Hampshire Chemical Corp
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 Hampshire Chemical Corp filed Critical Hampshire Chemical Corp
Publication of DE69606346D1 publication Critical patent/DE69606346D1/en
Application granted granted Critical
Publication of DE69606346T2 publication Critical patent/DE69606346T2/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • D21C9/163—Bleaching ; Apparatus therefor with per compounds with peroxides
    • 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)
  • Detergent Compositions (AREA)
DE69606346T 1995-04-27 1996-04-23 Ethylene diamine triacetic acid and its salts as chelating agents for bleaching pulp Expired - Fee Related DE69606346T2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US43107895A 1995-04-27 1995-04-27

Publications (2)

Publication Number Publication Date
DE69606346D1 true DE69606346D1 (en) 2000-03-02
DE69606346T2 DE69606346T2 (en) 2000-10-19

Family

ID=23710353

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69606346T Expired - Fee Related DE69606346T2 (en) 1995-04-27 1996-04-23 Ethylene diamine triacetic acid and its salts as chelating agents for bleaching pulp

Country Status (7)

Country Link
EP (1) EP0740015B1 (en)
AU (1) AU693011B2 (en)
BR (1) BR9602035A (en)
CA (1) CA2173824A1 (en)
DE (1) DE69606346T2 (en)
ES (1) ES2144168T3 (en)
ZA (1) ZA963060B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI105932B (en) * 1996-05-30 2000-10-31 Kemira Chemicals Oy A process for bleaching high yield or recycled pulp
FI104572B (en) 1996-05-30 2000-02-29 Kemira Chemicals Oy Chemical pulp bleaching process
FI105214B (en) * 1997-11-13 2000-06-30 Kemira Chemicals Oy Enhanced chemical pulp bleaching process
US8361571B2 (en) 2008-06-20 2013-01-29 International Paper Company Composition and recording sheet with improved optical properties
US8258334B2 (en) 2008-11-12 2012-09-04 Irix Pharmaceuticals, Inc. N-alkanoyl-N,N′,N′-alkylenediamine trialkanoic acid esters

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8620222D0 (en) * 1986-08-20 1986-10-01 Abitibi Price Inc Peroxide bleaching
US4732650A (en) * 1986-09-15 1988-03-22 The Dow Chemical Company Bleaching of cellulosic pulps using hydrogen peroxide
US5250728A (en) * 1991-12-12 1993-10-05 Hampshire Chemical Corp. Preparation of ethylenediaminetriacetic acid

Also Published As

Publication number Publication date
ZA963060B (en) 1996-07-30
AU5066896A (en) 1996-11-07
ES2144168T3 (en) 2000-06-01
CA2173824A1 (en) 1996-10-28
BR9602035A (en) 1998-10-06
EP0740015A1 (en) 1996-10-30
EP0740015B1 (en) 2000-01-26
AU693011B2 (en) 1998-06-18
DE69606346T2 (en) 2000-10-19

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee