CA2069447A1 - Pulp Alkali Addition Process for High Consistency Oxygen Delignification - Google Patents

Pulp Alkali Addition Process for High Consistency Oxygen Delignification

Info

Publication number
CA2069447A1
CA2069447A1 CA2069447A CA2069447A CA2069447A1 CA 2069447 A1 CA2069447 A1 CA 2069447A1 CA 2069447 A CA2069447 A CA 2069447A CA 2069447 A CA2069447 A CA 2069447A CA 2069447 A1 CA2069447 A1 CA 2069447A1
Authority
CA
Canada
Prior art keywords
pulp
consistency
addition process
high consistency
oxygen delignification
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.)
Granted
Application number
CA2069447A
Other languages
French (fr)
Other versions
CA2069447C (en
Inventor
Bruce F. Griggs
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.)
Union Camp Patent Holding Inc
Original Assignee
Individual
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
Priority to CA002069447A priority Critical patent/CA2069447C/en
Priority to AU78754/91A priority patent/AU647485B2/en
Priority to EP19910909663 priority patent/EP0539381A4/en
Priority to PCT/US1991/002673 priority patent/WO1992018689A1/en
Priority to JP3509138A priority patent/JPH06501290A/en
Application filed by Individual filed Critical Individual
Priority to CN91103486A priority patent/CN1066308A/en
Publication of CA2069447A1 publication Critical patent/CA2069447A1/en
Priority to SE9203801A priority patent/SE9203801L/en
Application granted granted Critical
Publication of CA2069447C publication Critical patent/CA2069447C/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
    • D21C9/001—Modification of pulp properties
    • D21C9/002—Modification of pulp properties by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives
    • D21C9/004—Modification of pulp properties by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives inorganic 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
    • D21C9/1005—Pretreatment of the pulp, e.g. degassing the pulp
    • 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)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Paper (AREA)

Abstract

Unbleached pulp is combined with an aqueous alkaline solution while in a state of low consistency to distribute a first amount of alkaline material sub-stantially uniformly throughout the pulp. The consistency of the pulp is then increased to above about 18%, and the high consistency alkali containing pulp is then treated with oxygen to effect delignification. The total amount of alkaline material applied to the pulp is between 0.8 and 7% by weight of oven dry pulp. High strength, low lignin pulps are subsequently formed which may be further bleached to high brightness with reduced amounts of chemicals.
CA002069447A 1991-04-18 1991-04-18 Pulp alkali addition process for high consistency oxygen delignification Expired - Fee Related CA2069447C (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
AU78754/91A AU647485B2 (en) 1991-04-18 1991-04-18 Pulp alkali addition process for high consistency oxygen delignification
EP19910909663 EP0539381A4 (en) 1991-04-18 1991-04-18 Pulp alkali addition process for high consistency oxygen delignification.
PCT/US1991/002673 WO1992018689A1 (en) 1991-04-18 1991-04-18 Pulp alkali addition process for high consistency oxygen delignification
JP3509138A JPH06501290A (en) 1991-04-18 1991-04-18 Pulp alkali addition method for high consistency oxygen delignification
CA002069447A CA2069447C (en) 1991-04-18 1991-04-18 Pulp alkali addition process for high consistency oxygen delignification
CN91103486A CN1066308A (en) 1991-04-18 1991-04-30 The pulp alkali addition method that is used for the high concentration oxygen delignification
SE9203801A SE9203801L (en) 1991-04-18 1992-12-17 MASS PREPARATION PROCEDURE WITH ALKALITE ADDITION FOR THICK MASS OXYGEN ELIGIBILITY

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
PCT/US1991/002673 WO1992018689A1 (en) 1991-04-18 1991-04-18 Pulp alkali addition process for high consistency oxygen delignification
CA002069447A CA2069447C (en) 1991-04-18 1991-04-18 Pulp alkali addition process for high consistency oxygen delignification
CN91103486A CN1066308A (en) 1991-04-18 1991-04-30 The pulp alkali addition method that is used for the high concentration oxygen delignification
SE9203801A SE9203801L (en) 1991-04-18 1992-12-17 MASS PREPARATION PROCEDURE WITH ALKALITE ADDITION FOR THICK MASS OXYGEN ELIGIBILITY

Publications (2)

Publication Number Publication Date
CA2069447A1 true CA2069447A1 (en) 1992-10-19
CA2069447C CA2069447C (en) 1996-08-27

Family

ID=27426917

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002069447A Expired - Fee Related CA2069447C (en) 1991-04-18 1991-04-18 Pulp alkali addition process for high consistency oxygen delignification

Country Status (7)

Country Link
EP (1) EP0539381A4 (en)
JP (1) JPH06501290A (en)
CN (1) CN1066308A (en)
AU (1) AU647485B2 (en)
CA (1) CA2069447C (en)
SE (1) SE9203801L (en)
WO (1) WO1992018689A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI923585A (en) * 1991-08-14 1993-02-15 Union Camp Patent Holding ANVAENDNING AV EN TVAETTPRESS I EN ALKALITILLSATSPROCESS FOER MASS
CN100395403C (en) * 2007-08-03 2008-06-18 山东泉林纸业有限责任公司 Oxygen delignify treating method for grass group unbleached chemical pulp
JP7163415B2 (en) * 2018-05-28 2022-10-31 ピアソン キャピタル エンバイロメンタル （ベイジン） リミテッド Efficient methods and compositions for recovering products from organic acid pretreatment of plant material

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE334286B (en) * 1968-12-05 1971-04-19 Mo Och Domsjoe Ab
US4198266A (en) * 1977-10-12 1980-04-15 Airco, Inc. Oxygen delignification of wood pulp
US4198261A (en) * 1977-12-05 1980-04-15 Gould Inc. Method for end point detection during plasma etching
US4806203A (en) * 1985-02-14 1989-02-21 Elton Edward F Method for alkaline delignification of lignocellulosic fibrous material at a consistency which is raised during reaction
JPH02289194A (en) * 1989-04-20 1990-11-29 Mitsubishi Paper Mills Ltd Method for bleaching lignocellulosic substance with oxygen

Also Published As

Publication number Publication date
EP0539381A1 (en) 1993-05-05
AU647485B2 (en) 1994-03-24
SE9203801D0 (en) 1992-12-17
JPH06501290A (en) 1994-02-10
WO1992018689A1 (en) 1992-10-29
CN1066308A (en) 1992-11-18
AU7875491A (en) 1992-11-17
SE9203801L (en) 1993-02-10
CA2069447C (en) 1996-08-27
EP0539381A4 (en) 1994-10-12

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed
MKLA Lapsed

Effective date: 19990419