CA1065105A - Method for bleaching of material containing cellulose - Google Patents

Method for bleaching of material containing cellulose

Info

Publication number
CA1065105A
CA1065105A CA215,743A CA215743A CA1065105A CA 1065105 A CA1065105 A CA 1065105A CA 215743 A CA215743 A CA 215743A CA 1065105 A CA1065105 A CA 1065105A
Authority
CA
Canada
Prior art keywords
pulp
bleaching
oxidizing gas
pressure
pulp suspension
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
Application number
CA215,743A
Other languages
English (en)
French (fr)
Other versions
CA215743S (en
Inventor
Frey V. Sundman
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.)
Ahlstrom Corp
Original Assignee
Ahlstrom Corp
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 Ahlstrom Corp filed Critical Ahlstrom Corp
Application granted granted Critical
Publication of CA1065105A publication Critical patent/CA1065105A/en
Expired 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
    • D21C9/147—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications
    • 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
    • D21C9/1036—Use of compounds accelerating or improving the efficiency of the processes

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Conductive Materials (AREA)
  • Pigments, Carbon Blacks, Or Wood Stains (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
CA215,743A 1973-12-20 1974-12-11 Method for bleaching of material containing cellulose Expired CA1065105A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7317221A SE390549C (sv) 1973-12-20 1973-12-20 Sett att bleka cellulosahaltigt material med syre eller fritt syre innehallande gas i alkalisk miljo

Publications (1)

Publication Number Publication Date
CA1065105A true CA1065105A (en) 1979-10-30

Family

ID=20319462

Family Applications (1)

Application Number Title Priority Date Filing Date
CA215,743A Expired CA1065105A (en) 1973-12-20 1974-12-11 Method for bleaching of material containing cellulose

Country Status (12)

Country Link
JP (1) JPS524643B2 (sv)
BR (1) BR7410652D0 (sv)
CA (1) CA1065105A (sv)
DE (1) DE2460144B2 (sv)
FI (1) FI52878C (sv)
FR (1) FR2255419B1 (sv)
GB (1) GB1452710A (sv)
IT (1) IT1027773B (sv)
NO (1) NO142128C (sv)
SE (1) SE390549C (sv)
SU (1) SU850019A3 (sv)
ZA (1) ZA747918B (sv)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0397308A2 (en) * 1989-05-10 1990-11-14 A. Ahlstrom Corporation Method of bleaching cellulose pulp with ozone
US5460696A (en) * 1993-08-12 1995-10-24 The Boc Group, Inc. Oxygen delignification method incorporating wood pulp mixing apparatus

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS563214Y2 (sv) * 1978-05-15 1981-01-24
US4209359A (en) * 1978-10-23 1980-06-24 International Paper Company Process for removing residual oxygen from oxygen-bleached pulp
SE462919B (sv) * 1979-05-11 1990-09-17 Sunds Defibrator Ind Ab Saett att genomfoera alkaliextraktion av cellulosamassa i naervaro av syre
US4574032A (en) * 1979-10-15 1986-03-04 Westvaco Corporation Process for delignification of lignocellulosic material in the presence of anthraquinone in solution with white and black liquors
SE452896B (sv) * 1985-01-24 1987-12-21 Aga Ab Forfarande for behandling av cellulosamassor
SE460202B (sv) * 1987-03-13 1989-09-18 Aga Ab Saett vid behandling av ett material med en gas i en vaetska

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0397308A2 (en) * 1989-05-10 1990-11-14 A. Ahlstrom Corporation Method of bleaching cellulose pulp with ozone
EP0397308B1 (en) * 1989-05-10 1996-10-09 A. Ahlstrom Corporation Method of bleaching cellulose pulp with ozone
US6547923B1 (en) * 1989-05-10 2003-04-15 Andritz Oy Process for bleaching medium consistency pulp with ozone using a pressurized fluidizing mixer
US6579411B1 (en) * 1989-05-10 2003-06-17 Andritz Oy Bleaching medium consistency pulp with ozone
US5460696A (en) * 1993-08-12 1995-10-24 The Boc Group, Inc. Oxygen delignification method incorporating wood pulp mixing apparatus
US5591308A (en) * 1993-08-12 1997-01-07 The Boc Group, Inc. Wood pulp reactor

Also Published As

Publication number Publication date
FI370274A (sv) 1975-06-21
DE2460144A1 (de) 1975-07-03
FR2255419A1 (sv) 1975-07-18
FR2255419B1 (sv) 1979-06-01
FI52878C (sv) 1987-09-24
NO142128C (no) 1980-07-02
SE390549B (sv) 1976-12-27
NO142128B (no) 1980-03-24
JPS524643B2 (sv) 1977-02-05
SE390549C (sv) 1986-04-14
GB1452710A (en) 1976-10-13
NO744609L (sv) 1975-07-14
SE7317221L (sv) 1975-06-23
BR7410652D0 (pt) 1975-09-02
SU850019A3 (ru) 1981-07-23
DE2460144B2 (de) 1977-03-03
FI52878B (sv) 1977-08-31
ZA747918B (en) 1975-12-31
JPS5094202A (sv) 1975-07-26
IT1027773B (it) 1978-12-20

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