FI52878C - Foerfarande foer blekning av cellulosahaltigt material. - Google Patents

Foerfarande foer blekning av cellulosahaltigt material. Download PDF

Info

Publication number
FI52878C
FI52878C FI743702A FI370274A FI52878C FI 52878 C FI52878 C FI 52878C FI 743702 A FI743702 A FI 743702A FI 370274 A FI370274 A FI 370274A FI 52878 C FI52878 C FI 52878C
Authority
FI
Finland
Prior art keywords
oxygen
alkali
bleaching
mass
pulp
Prior art date
Application number
FI743702A
Other languages
English (en)
Finnish (fi)
Swedish (sv)
Other versions
FI370274A (it
FI52878B (it
Inventor
Frey Viking Sundman
Original Assignee
Ahlstroem Oy
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 Ahlstroem Oy filed Critical Ahlstroem Oy
Publication of FI370274A publication Critical patent/FI370274A/fi
Application granted granted Critical
Publication of FI52878B publication Critical patent/FI52878B/fi
Publication of FI52878C publication Critical patent/FI52878C/fi

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)
  • Compositions Of Macromolecular Compounds (AREA)
  • Conductive Materials (AREA)
  • Pigments, Carbon Blacks, Or Wood Stains (AREA)
FI743702A 1973-12-20 1974-12-19 Foerfarande foer blekning av cellulosahaltigt material. FI52878C (fi)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE7317221 1973-12-20
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 (3)

Publication Number Publication Date
FI370274A FI370274A (it) 1975-06-21
FI52878B FI52878B (it) 1977-08-31
FI52878C true FI52878C (fi) 1987-09-24

Family

ID=20319462

Family Applications (1)

Application Number Title Priority Date Filing Date
FI743702A FI52878C (fi) 1973-12-20 1974-12-19 Foerfarande foer blekning av cellulosahaltigt material.

Country Status (12)

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

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS563214Y2 (it) * 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
FI89516B (fi) * 1989-05-10 1993-06-30 Ahlstroem Oy Foerfarande foer blekning av cellulosamassa med otson
US5460696A (en) * 1993-08-12 1995-10-24 The Boc Group, Inc. Oxygen delignification method incorporating wood pulp mixing apparatus

Also Published As

Publication number Publication date
FI370274A (it) 1975-06-21
DE2460144A1 (de) 1975-07-03
FR2255419A1 (it) 1975-07-18
FR2255419B1 (it) 1979-06-01
NO142128C (no) 1980-07-02
SE390549B (sv) 1976-12-27
NO142128B (no) 1980-03-24
CA1065105A (en) 1979-10-30
JPS524643B2 (it) 1977-02-05
SE390549C (sv) 1986-04-14
GB1452710A (en) 1976-10-13
NO744609L (it) 1975-07-14
SE7317221L (it) 1975-06-23
BR7410652D0 (pt) 1975-09-02
SU850019A3 (ru) 1981-07-23
DE2460144B2 (de) 1977-03-03
FI52878B (it) 1977-08-31
ZA747918B (en) 1975-12-31
JPS5094202A (it) 1975-07-26
IT1027773B (it) 1978-12-20

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