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WO1991012366A1 - Blanchiment de pate a papier - Google Patents

Blanchiment de pate a papier Download PDF

Info

Publication number
WO1991012366A1
WO1991012366A1 PCT/AU1991/000045 AU9100045W WO9112366A1 WO 1991012366 A1 WO1991012366 A1 WO 1991012366A1 AU 9100045 W AU9100045 W AU 9100045W WO 9112366 A1 WO9112366 A1 WO 9112366A1
Authority
WO
WIPO (PCT)
Prior art keywords
bleaching
pulp
chlorine
oxygen
washing
Prior art date
Application number
PCT/AU1991/000045
Other languages
English (en)
Inventor
Roger Anthony Cook
Original Assignee
Amcor Limited
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 Limited filed Critical Amcor Limited
Priority to BR919106033A priority Critical patent/BR9106033A/pt
Publication of WO1991012366A1 publication Critical patent/WO1991012366A1/fr

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

Definitions

  • This invention relates to improvements in bleaching of pulp.
  • it relates to modifications to conventional bleaching processes which use chlorine and/or chlorine-containing substitutes.
  • These chlorine-containing substitutes include hypochlorites (sodium or calcium) and chlorine dioxide.
  • Bleaching processes which use chlorine-containing chemicals present the problem of discharge of effluents containing organochlorine compounds, it is known that the amount of organochlorine compounds discharged can be reduced if the quantity of chlorine-containing bleaching chemicals is reduced via pretreatment of the pulp with oxygen and/or peroxides such as hydrogen peroxide.
  • the process then involves the steps of (i) treating unbleached pulp with oxygen and/or hydrogen peroxide (ii) washing the pulp (iii) treating the washed pulp in conventional chlorine-containing sequences to complete the bleaching treatment.
  • the present invention provides a method of bleaching paper pulp in which unbleached pulp is treated with oxygen and/or hydrogen peroxide and is subsequently contacted with a bleaching agent.
  • This invention is predicated on the surprising discovery that the washing step prior to application of the bleaching agent is not essential in achieving a significant reduction of the amount of bleaching chemical used.
  • the bleaching chemical may be selected from chlorine, hypochlorite or chlorine dioxide or a mixture thereof, and the stage using this chemical or mixture is referred to as a "chlorination" stage.
  • the improvement proposed by this invention is an inexpensive modification to a conventional bleaching plant providing a substantial reduction in bleaching chemical usage and hence organochlorine discharge in the effluent for the same whitening result. This process is applicable to hardwoods such as eucalypts and also with softwoods. It is estimated that savings in chemical usage in the "chlorination" stage with this modification will be about 50% of the savings in chemical usage of a conventional hydrostatic oxidative delignification and washing stage but at vastly reduced capital cost.
  • oxygen When oxygen is employed for a hydrostatic oxygen delignification stage the oxygen may be injected through a sparger or mixer into the pulp as it is conveyed through a pipeline at medium consistency. The pressure required must be sufficient to exceed the pressure at the point of injection.
  • bleaching conditions for the oxygen or hydrogen peroxide hydrostatic pretreatment are addition of 5 to 15 kg of sodium hydroxide and 5 to 15 kg oxygen and/or hydrogen per tonne of unbleached pulp.
  • Example 2 Another sample of the same pulp as in Example 1 was pretreated in a similar fashion and not washed. This sample and another control sample were then bleched in another stagewise process.
  • steps 2. to 6. were identical for the two samples of pulp and the active chlorine dose in the first step adjusted to give approximately the same brightness.
  • the ratio of chlorine dioxide to chlorine in step 1. was constant (60/40 D to C).
  • Example 2 Another sample of the same pulp as in Example 1 was pretreated in a similar fashion and not washed. This sample and another control sample were then bleached in another stagewise process.
  • steps 2. to 6. were identical for the two samples of pulp and the active chlorine dose in the first step adjusted to give the same brightness
  • Example 4 As in Example 4, a mill trial was run using a combination of oxygen and hydrogen peroxide together with caustic soda on the unbleached pulp. The measured response was that the effects of the oxygen and peroxide were additive with respect to reduced active chlorine use and effluent discharge.

Landscapes

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

Abstract

L'invention se rapporte à un procédé de blanchiment modifié qui s'accompagne d'une plus grande réduction de la production des organochlores provenant des effluents de blanchiment sans entraîner de coûts élevés. Dans ce procédé, la pulpe non blanchie est d'abord traitée avec du peroxyde d'oxygène et/ou d'hydrogène, puis la pulpe traitée est mise en contact avec un chlore et/ou avec un dioxyde de chlore et/ou avec un hypochlorite sans l'intervention d'une étape de lavage. La phase d'oxydation initiale est effectuée à un pH de 10 à 11 à une température comprise entre 60 °C et 100 °C et pendant une période de 3 à 60 minutes.
PCT/AU1991/000045 1990-02-19 1991-02-11 Blanchiment de pate a papier WO1991012366A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
BR919106033A BR9106033A (pt) 1990-02-19 1991-02-11 Metodo de branqueamento de polpa de papel

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPJ869590 1990-02-19
AUPJ8695 1990-02-19

Publications (1)

Publication Number Publication Date
WO1991012366A1 true WO1991012366A1 (fr) 1991-08-22

Family

ID=3774506

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1991/000045 WO1991012366A1 (fr) 1990-02-19 1991-02-11 Blanchiment de pate a papier

Country Status (6)

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

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0562835A1 (fr) * 1992-03-24 1993-09-29 ALBRIGHT & WILSON UK LIMITED Stabilisation de liqueurs de blanchiment
RU2173741C1 (ru) * 2001-02-22 2001-09-20 Открытое акционерное общество "Котласский целлюлозно-бумажный комбинат" Способ отбелки сульфатной целлюлозы
CN100500990C (zh) * 2005-09-02 2009-06-17 华南理工大学 纸浆清洁漂白方法
US8012770B2 (en) 2009-07-31 2011-09-06 Invisible Sentinel, Inc. Device for detection of antigens and uses thereof
US9475049B2 (en) 2009-07-31 2016-10-25 Invisible Sentinel, Inc. Analyte detection devices, multiplex and tabletop devices for detection of analyte, and uses thereof
US9557330B2 (en) 2009-10-09 2017-01-31 Invisible Sentinel, Inc. Device for detection of analytes and uses thereof
US9823240B2 (en) 2012-03-09 2017-11-21 Invisible Sentinel, Inc. Methods and compositions for detecting multiple analytes with a single signal
WO2018134525A1 (fr) 2017-01-23 2018-07-26 Centre Technique De L'industrie Des Papiers, Cartons Et Celluloses Procede de blanchiment d'une pate a papier

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3423282A (en) * 1964-05-22 1969-01-21 L Air Liquide Sa Pour L Etudes Delignification of chemical cellulose pulps with oxygen and then chlorine
GB1342580A (en) * 1969-12-19 1974-01-03 Canadian Ind Oxygen bleaching process for lignocellulosic materials
US3865685A (en) * 1972-04-21 1975-02-11 Degussa Multiple step bleaching of cellulose with a per compound and chloride dioxide
CA1122358A (fr) * 1978-09-21 1982-04-27 Horst Kruger Methode de blanchiment absolu de la pate a papier
CA1164157A (fr) * 1980-09-23 1984-03-27 Hortensia N.F. Rodriguez Blanchiment de la pate de bagasse a l'oxygene et aux alcalis
US4756798A (en) * 1984-06-15 1988-07-12 Air Liquide Process for bleaching a mechanical pulp with hydrogen peroxide
AU2679888A (en) * 1988-01-28 1989-08-03 Degussa A.G. Process for producing semibleached kraft pulp

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3423282A (en) * 1964-05-22 1969-01-21 L Air Liquide Sa Pour L Etudes Delignification of chemical cellulose pulps with oxygen and then chlorine
GB1342580A (en) * 1969-12-19 1974-01-03 Canadian Ind Oxygen bleaching process for lignocellulosic materials
US3865685A (en) * 1972-04-21 1975-02-11 Degussa Multiple step bleaching of cellulose with a per compound and chloride dioxide
CA1122358A (fr) * 1978-09-21 1982-04-27 Horst Kruger Methode de blanchiment absolu de la pate a papier
CA1164157A (fr) * 1980-09-23 1984-03-27 Hortensia N.F. Rodriguez Blanchiment de la pate de bagasse a l'oxygene et aux alcalis
US4756798A (en) * 1984-06-15 1988-07-12 Air Liquide Process for bleaching a mechanical pulp with hydrogen peroxide
AU2679888A (en) * 1988-01-28 1989-08-03 Degussa A.G. Process for producing semibleached kraft pulp

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0562835A1 (fr) * 1992-03-24 1993-09-29 ALBRIGHT & WILSON UK LIMITED Stabilisation de liqueurs de blanchiment
RU2173741C1 (ru) * 2001-02-22 2001-09-20 Открытое акционерное общество "Котласский целлюлозно-бумажный комбинат" Способ отбелки сульфатной целлюлозы
CN100500990C (zh) * 2005-09-02 2009-06-17 华南理工大学 纸浆清洁漂白方法
US8012770B2 (en) 2009-07-31 2011-09-06 Invisible Sentinel, Inc. Device for detection of antigens and uses thereof
US8183059B2 (en) 2009-07-31 2012-05-22 Invisible Sentinel, Inc. Device for detection of target molecules and uses thereof
US9341624B2 (en) 2009-07-31 2016-05-17 Invisible Sentinel, Inc. Device for detection of target molecules and uses thereof
US9475049B2 (en) 2009-07-31 2016-10-25 Invisible Sentinel, Inc. Analyte detection devices, multiplex and tabletop devices for detection of analyte, and uses thereof
US9816984B2 (en) 2009-07-31 2017-11-14 Invisible Sentinel, Inc. Device for detection of target molecules and uses thereof
US10705084B2 (en) 2009-07-31 2020-07-07 Invisible Sentinel, Inc. Analyte detection devices, multiplex and tabletop devices for detection of analytes, and uses thereof
US10495638B2 (en) 2009-10-09 2019-12-03 Invisible Sentinel, Inc. Device for detection of analytes and uses thereof
US9557330B2 (en) 2009-10-09 2017-01-31 Invisible Sentinel, Inc. Device for detection of analytes and uses thereof
US10018626B2 (en) 2012-03-09 2018-07-10 Invisible Sentinel, Inc. Methods and compositions for detecting multiple analytes with a single signal
US9823240B2 (en) 2012-03-09 2017-11-21 Invisible Sentinel, Inc. Methods and compositions for detecting multiple analytes with a single signal
US10732177B2 (en) 2012-03-09 2020-08-04 Invisible Sentinel, Inc. Methods and compositions for detecting multiple analytes with a single signal
FR3062138A1 (fr) * 2017-01-23 2018-07-27 Centre Technique De L'industrie Des Papiers, Cartons Et Celluloses Procede de blanchiment d'une pate a papier
CN110177909A (zh) * 2017-01-23 2019-08-27 纸、纸板和纤维素工业技术中心 用于漂白纸浆的方法
WO2018134525A1 (fr) 2017-01-23 2018-07-26 Centre Technique De L'industrie Des Papiers, Cartons Et Celluloses Procede de blanchiment d'une pate a papier
JP2020514564A (ja) * 2017-01-23 2020-05-21 センタ・テクニーク・デ・ルインダストリ・デ・パピール・カルトン・エ・セルロースＣｅｎｔｒｅ Ｔｅｃｈｎｉｑｕｅ Ｄｅ Ｌｉｎｄｕｓｔｒｉｅ Ｄｅｓ Ｐａｐｉｅｒｓ Ｃａｒｔｏｎｓ Ｃｅｌｌｕｌｏｓｅｓ 紙パルプを漂白するための方法
RU2747664C2 (ru) * 2017-01-23 2021-05-11 Сантр Текник Де Л'Индустри Де Папье, Картон И Селлюлоз Способ отбеливания бумажной массы
US11384480B2 (en) 2017-01-23 2022-07-12 Centre Technique De L'industrie Des Papiers, Cartons Et Celluloses Method for bleaching paper pulp

Also Published As

Publication number Publication date
BR9106033A (pt) 1993-01-19
ZA911062B (en) 1991-11-27
PT96816A (pt) 1991-10-31
PT96816B (pt) 1998-07-31
ES2038954A6 (es) 1993-08-01
NZ237019A (en) 1992-11-25

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