BR9508388A - Process for bleaching peroxide for cellulosic and lignocellulosic material - Google Patents

Process for bleaching peroxide for cellulosic and lignocellulosic material

Info

Publication number
BR9508388A
BR9508388A BR9508388A BR9508388A BR9508388A BR 9508388 A BR9508388 A BR 9508388A BR 9508388 A BR9508388 A BR 9508388A BR 9508388 A BR9508388 A BR 9508388A BR 9508388 A BR9508388 A BR 9508388A
Authority
BR
Brazil
Prior art keywords
pulp
bleaching
peroxide
reaction
hydrogen peroxide
Prior art date
Application number
BR9508388A
Other languages
Portuguese (pt)
Inventor
William J Miller
Lewis D Shackford
Brian P Roy
Barbara Van Lierop
Original Assignee
Beloit Technologies Inc
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=23044357&utm_source=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=BR9508388(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Beloit Technologies Inc filed Critical Beloit Technologies Inc
Publication of BR9508388A publication Critical patent/BR9508388A/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
    • D21C9/1026—Other features in bleaching processes
    • 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
    • D21C9/1057—Multistage, with compounds cited in more than one sub-group D21C9/10, D21C9/12, D21C9/16
    • 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

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Detergent Compositions (AREA)

Abstract

A method for bleaching cellulosic and lignocellulosic pulp using hydrogen peroxide as a bleaching reagent, utilizes a three stage reaction, viz. two short high temperature peroxide bleaching steps (50,160) at a pressure sufficient to suppress boiling and an interstage treatment (90) including a longer atmospheric pressure reduced temperature bleaching step. The two short peroxide bleaching stages include the steps of introducing pulp, at a consistency of 10%-18%, to a mixer (20,130) in which the pulp is heated to a temperature above 100 degree Celsius; adding sufficient sodium hydroxide (32,142) to bring the pulp to a pH of 8.5; adding sufficient hydrogen peroxide (33,143) to equal from about 0.5%-5.0%, by weight, of the pulp; passing the pulp through a pressurized reactor column (50,160) at a rate providing a reaction time in the column of less than 45 minutes, cooling the pulp and discharging the cooled pulp to a washer. It may be desirable to introduce the pulp to a mixer and add alkali to reactivate residual hydrogen peroxide by bringing the pulp to a pH of at least 9 after the first bleaching stage, deposit the pulp in a reaction tower and allowing the reaction to proceed until a substantial portion of the residual hydrogen has been consumed. <IMAGE>
BR9508388A 1994-07-11 1995-06-29 Process for bleaching peroxide for cellulosic and lignocellulosic material BR9508388A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US27353994A 1994-07-11 1994-07-11
PCT/US1995/008137 WO1996001920A1 (en) 1994-07-11 1995-06-29 Peroxide bleaching process for cellulosic and lignocellulosic material

Publications (1)

Publication Number Publication Date
BR9508388A true BR9508388A (en) 1998-07-14

Family

ID=23044357

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9508388A BR9508388A (en) 1994-07-11 1995-06-29 Process for bleaching peroxide for cellulosic and lignocellulosic material

Country Status (13)

Country Link
EP (2) EP0919661A1 (en)
JP (1) JP2787618B2 (en)
CN (1) CN1176673A (en)
AT (1) ATE189716T1 (en)
BR (1) BR9508388A (en)
CA (1) CA2194880A1 (en)
DE (2) DE797703T1 (en)
ES (1) ES2107399T3 (en)
FI (1) FI970104A (en)
PT (1) PT797703E (en)
RU (1) RU2141016C1 (en)
WO (1) WO1996001920A1 (en)
ZA (1) ZA955290B (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69620608T2 (en) * 1995-06-20 2002-10-31 Andritz Oy, Helsinki METHOD AND DEVICE FOR TREATING A BAD HEAT-DERIVING MATERIAL
JP2002266272A (en) * 2001-03-12 2002-09-18 Nippon Paper Industries Co Ltd Method for bleaching cellulosic fibrous material pulp
US20050051288A1 (en) * 2003-09-09 2005-03-10 Caifang Yin Extended retention and medium consistency pulp treatment
US7297225B2 (en) * 2004-06-22 2007-11-20 Georgia-Pacific Consumer Products Lp Process for high temperature peroxide bleaching of pulp with cool discharge
CN100412267C (en) * 2006-04-30 2008-08-20 华南理工大学 Method for bleaching middle and thick paper pulp by hydrogen peroxide and through double bleaching tower
FR2910027B1 (en) * 2006-12-13 2009-11-06 Itt Mfg Enterprises Inc PROCESS FOR WHITENING CHEMICAL STRIPPING PASTES BY FINAL OZONE TREATMENT AT HIGH TEMPERATURE
JP5585323B2 (en) * 2010-09-07 2014-09-10 王子ホールディングス株式会社 Method for bleaching pulp for papermaking
CN115821617B (en) * 2022-12-06 2024-01-05 金隆浆纸业(江苏)有限公司 Paper pulp bleaching method

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2613388B1 (en) * 1987-04-02 1990-05-04 Atochem PROCESS FOR BLEACHING PASTA
FR2661430B1 (en) * 1990-04-30 1992-07-17 Atochem HIGH-YIELD PAPER PULP HYDROGEN PEROXIDE BLEACHING PROCESS.
BE1006056A3 (en) * 1992-07-06 1994-05-03 Solvay Interox Method of laundering of chemical pulp.
SE500616C2 (en) * 1993-06-08 1994-07-25 Kvaerner Pulping Tech Bleaching of chemical pulp with peroxide at overpressure

Also Published As

Publication number Publication date
WO1996001920A1 (en) 1996-01-25
RU2141016C1 (en) 1999-11-10
PT797703E (en) 2000-07-31
EP0797703B1 (en) 2000-02-09
FI970104A (en) 1997-03-10
ZA955290B (en) 1996-12-27
EP0797703A1 (en) 1997-10-01
CN1176673A (en) 1998-03-18
ATE189716T1 (en) 2000-02-15
JPH09508945A (en) 1997-09-09
FI970104A0 (en) 1997-01-10
DE69515066T2 (en) 2001-04-19
ES2107399T3 (en) 2000-07-01
DE797703T1 (en) 1998-02-19
ES2107399T1 (en) 1997-12-01
CA2194880A1 (en) 1996-01-25
EP0919661A1 (en) 1999-06-02
DE69515066D1 (en) 2000-03-16
JP2787618B2 (en) 1998-08-20

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Legal Events

Date Code Title Description
FA10 Dismissal: dismissal - article 33 of industrial property law
HKFN Application deemed withdrawn (deleted)
FB36 Technical and formal requirements: requirement - article 36 of industrial property law
FA8 Dismissal: dismissal - article 36, par. 1 of industrial property law
B15K Others concerning applications: alteration of classification

Ipc: D21C 9/10 (2006.01), D21C 9/16 (2006.0