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ES2038954A6 - Bleaching of paper pulp - Google Patents

Bleaching of paper pulp

Info

Publication number
ES2038954A6
ES2038954A6 ES9150024A ES9150024A ES2038954A6 ES 2038954 A6 ES2038954 A6 ES 2038954A6 ES 9150024 A ES9150024 A ES 9150024A ES 9150024 A ES9150024 A ES 9150024A ES 2038954 A6 ES2038954 A6 ES 2038954A6
Authority
ES
Spain
Prior art keywords
bleaching
paper pulp
pulp
chlorine
treated
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
ES9150024A
Other languages
Spanish (es)
Inventor
Roger Anthony Cook
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.)
Amcor Pty Ltd
Original Assignee
Amcor Pty Ltd
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 Amcor Pty Ltd filed Critical Amcor Pty Ltd
Publication of ES2038954A6 publication Critical patent/ES2038954A6/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
    • D21C9/12—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds
    • D21C9/14—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites
    • 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
    • D21C9/147—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)

Abstract

A modified bleaching process with improved reduction of organo-chlorines from the bleaching effluents without high capital cost. The unbleached pulp is initially treated with oxygen and/or hydrogen peroxide and subsequently contacting the treated pulp with a chlorine and/or chlorine dioxide and/or hypochlorite without an intervening washing step. The initial oxidizing stage is carried out at pH 10 to 11 at a temperature of from 60 DEG C to 100 DEG C for a period of 3 to 60 minutes.
ES9150024A 1990-02-19 1991-02-11 Bleaching of paper pulp Expired - Fee Related ES2038954A6 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AUPJ869590 1990-02-19

Publications (1)

Publication Number Publication Date
ES2038954A6 true ES2038954A6 (en) 1993-08-01

Family

ID=3774506

Family Applications (1)

Application Number Title Priority Date Filing Date
ES9150024A Expired - Fee Related ES2038954A6 (en) 1990-02-19 1991-02-11 Bleaching of paper pulp

Country Status (6)

Country Link
BR (1) BR9106033A (en)
ES (1) ES2038954A6 (en)
NZ (1) NZ237019A (en)
PT (1) PT96816B (en)
WO (1) WO1991012366A1 (en)
ZA (1) ZA911062B (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9206415D0 (en) * 1992-03-24 1992-05-06 Albright & Wilson Stabilisation of bleach liquors
RU2173741C1 (en) * 2001-02-22 2001-09-20 Открытое акционерное общество "Котласский целлюлозно-бумажный комбинат" Method of bleaching sulfate cellulose
CN100500990C (en) * 2005-09-02 2009-06-17 华南理工大学 Paper pulp cleaning and bleaching process
US8012770B2 (en) 2009-07-31 2011-09-06 Invisible Sentinel, Inc. Device for detection of antigens and uses thereof
WO2011044574A1 (en) 2009-10-09 2011-04-14 Invisible Sentinel Device for detection of antigens and uses thereof
AU2012211141B2 (en) 2011-01-27 2016-11-03 Invisible Sentinel, Inc. Analyte detection devices, multiplex and tabletop devices for detection of analytes, and uses thereof
AU2013230917C1 (en) 2012-03-09 2021-09-16 Invisible Sentinel, Inc. Methods and compositions for detecting multiple analytes with a single signal
FR3062138B1 (en) * 2017-01-23 2019-06-07 Centre Technique De L'industrie Des Papiers, Cartons Et Celluloses PROCESS FOR WHITENING A PAPER PULP

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1404605A (en) * 1964-05-22 1965-07-02 Air Liquide Improvement in delignification of chemical cellulose pulps
CA897361A (en) * 1969-12-19 1972-04-11 E. Mallett Samuel Oxygen bleaching process
DE2219504C2 (en) * 1972-04-21 1974-10-03 Deutsche Gold- Und Silber-Scheideanstalt Vormals Roessler, 6000 Frankfurt Multi-stage bleaching of cellulose with significantly reduced use of chlorine
DE2841013C2 (en) * 1978-09-21 1984-06-07 Degussa Ag, 6000 Frankfurt Process for full bleaching of pulp
CA1164157A (en) * 1980-09-23 1984-03-27 Hortensia N.F. Rodriguez Bleaching of bagasse pulps with alkali-oxygen
FR2566015B1 (en) * 1984-06-15 1986-08-29 Centre Tech Ind Papier PROCESS FOR BLEACHING MECHANICAL PASTE WITH HYDROGEN PEROXIDE
DE3802401A1 (en) * 1988-01-28 1989-08-03 Degussa METHOD FOR PRODUCING SEMI-BLEACHED FUEL

Also Published As

Publication number Publication date
WO1991012366A1 (en) 1991-08-22
NZ237019A (en) 1992-11-25
PT96816B (en) 1998-07-31
ZA911062B (en) 1991-11-27
PT96816A (en) 1991-10-31
BR9106033A (en) 1993-01-19

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 20040916