CA1275759C - Method and apparatus for alkaline delignification of lignocellulosic fibrous material - Google Patents

Method and apparatus for alkaline delignification of lignocellulosic fibrous material

Info

Publication number
CA1275759C
CA1275759C CA000501953A CA501953A CA1275759C CA 1275759 C CA1275759 C CA 1275759C CA 000501953 A CA000501953 A CA 000501953A CA 501953 A CA501953 A CA 501953A CA 1275759 C CA1275759 C CA 1275759C
Authority
CA
Canada
Prior art keywords
pulp
liquid phase
reaction
alkali
alkaline solution
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 - Lifetime
Application number
CA000501953A
Other languages
English (en)
French (fr)
Inventor
Edward F. Elton
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.)
Individual
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
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of CA1275759C publication Critical patent/CA1275759C/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • D21C9/1026—Other features in bleaching processes

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
CA000501953A 1985-02-14 1986-02-14 Method and apparatus for alkaline delignification of lignocellulosic fibrous material Expired - Lifetime CA1275759C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US70157185A 1985-02-14 1985-02-14
US701,571 1985-02-14

Publications (1)

Publication Number Publication Date
CA1275759C true CA1275759C (en) 1990-11-06

Family

ID=24817884

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000501953A Expired - Lifetime CA1275759C (en) 1985-02-14 1986-02-14 Method and apparatus for alkaline delignification of lignocellulosic fibrous material

Country Status (6)

Country Link
EP (1) EP0211945A4 (fi)
JP (1) JPS62501921A (fi)
BR (1) BR8605554A (fi)
CA (1) CA1275759C (fi)
FI (1) FI864154A (fi)
WO (1) WO1986004938A1 (fi)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5173153A (en) * 1991-01-03 1992-12-22 Union Camp Patent Holding, Inc. Process for enhanced oxygen delignification using high consistency and a split alkali addition
JP2002517173A (ja) * 1991-01-03 2002-06-11 ユニオン キャンプ パテント ホウルディング インコーポレイテッド 塩素を使用しないリグノセルロースパルプの漂白法
EP0530881A1 (en) * 1991-08-14 1993-03-10 Union Camp Patent Holding, Inc. Use of wash press for pulp alkali addition process
FI924751A (fi) * 1991-10-29 1993-04-30 Union Camp Patent Holding Tvaettpressmodifikation foer en syredelignifieringsmetod
AU7720094A (en) * 1993-09-02 1995-03-22 Union Camp Patent Holding, Inc. Improved method for bleaching lignocellulosic pulp
US10968194B2 (en) 2019-03-28 2021-04-06 Delta Separations, Llc Equipment and method for continuously processing plant material
SE546238C2 (en) * 2022-06-27 2024-07-23 Valmet Oy Method for processing cellulose pulp obtained from a kraft process

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE621517A (fi) * 1963-03-04
SE334286B (fi) * 1968-12-05 1971-04-19 Mo Och Domsjoe Ab
SE415581B (sv) * 1977-04-18 1980-10-13 Mo Och Domsjoe Ab Forfarande for perocidblekning av hogutbytesmassa
US4104114A (en) * 1977-05-05 1978-08-01 Erco Envirotech Ltd. Bleach plant operation
US4154644A (en) * 1978-02-27 1979-05-15 Georgia-Pacific Corporation Pulp washer
JPS54134103A (en) * 1978-04-07 1979-10-18 Sanyo Kokusaku Pulp Co Purifying of sulfite pulp
US4259150A (en) * 1978-12-18 1981-03-31 Kamyr Inc. Plural stage mixing and thickening oxygen bleaching process
US4298427A (en) * 1979-06-15 1981-11-03 Weyerhaeuser Company Method and apparatus for intimately mixing oxygen and pulp while using an alkali to extract bleaching by-products
US4444621A (en) * 1980-11-21 1984-04-24 Mo Och Domsjo Aktiebolag Process and apparatus for the deresination and brightness improvement of cellulose pulp
US4543155A (en) * 1983-01-31 1985-09-24 The Boc Group, Inc. Method for bleaching wood pulp including dissolving oxygen into the dilution water of an extraction stage
US4568420B1 (en) * 1984-12-03 1999-03-02 Int Paper Co Multi-stage bleaching process including an enhanced oxidative extraction stage

Also Published As

Publication number Publication date
EP0211945A1 (en) 1987-03-04
EP0211945A4 (en) 1987-07-06
FI864154A0 (fi) 1986-10-14
BR8605554A (pt) 1987-04-22
JPS62501921A (ja) 1987-07-30
FI864154A (fi) 1986-10-14
WO1986004938A1 (en) 1986-08-28

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Legal Events

Date Code Title Description
MKLA Lapsed