FI45571C - Menetelmä ja laite etupäässä selluloosamassan valkaisemiseksi kaasuuma isella valkaisuaineella. - Google Patents

Menetelmä ja laite etupäässä selluloosamassan valkaisemiseksi kaasuuma isella valkaisuaineella.

Info

Publication number
FI45571C
FI45571C FI683201A FI320168A FI45571C FI 45571 C FI45571 C FI 45571C FI 683201 A FI683201 A FI 683201A FI 320168 A FI320168 A FI 320168A FI 45571 C FI45571 C FI 45571C
Authority
FI
Finland
Prior art keywords
cellulose pulp
apparatus primarily
bleaching cellulose
gas bleach
bleach
Prior art date
Application number
FI683201A
Other languages
English (en)
Swedish (sv)
Other versions
FI45571B (fi
Inventor
Engstroem Hans-Erik Rye
Original Assignee
Sunds Ab
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 Sunds Ab filed Critical Sunds Ab
Publication of FI45571B publication Critical patent/FI45571B/fi
Application granted granted Critical
Publication of FI45571C publication Critical patent/FI45571C/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
    • D21C9/1005—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

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Structure Of Emergency Protection For Nuclear Reactors (AREA)
FI683201A 1967-11-10 1968-11-08 Menetelmä ja laite etupäässä selluloosamassan valkaisemiseksi kaasuuma isella valkaisuaineella. FI45571C (fi)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE15463/67A SE333299B (sv) 1967-11-10 1967-11-10 Foerfarande vid och anordning foer blekning av foeretraedesvis cellulosamassa med gasformigt blekmedel

Publications (2)

Publication Number Publication Date
FI45571B FI45571B (fi) 1972-04-04
FI45571C true FI45571C (fi) 1972-07-10

Family

ID=20300683

Family Applications (1)

Application Number Title Priority Date Filing Date
FI683201A FI45571C (fi) 1967-11-10 1968-11-08 Menetelmä ja laite etupäässä selluloosamassan valkaisemiseksi kaasuuma isella valkaisuaineella.

Country Status (9)

Country Link
US (2) US3693380A (fi)
AT (1) AT300546B (fi)
DE (1) DE1807900A1 (fi)
FI (1) FI45571C (fi)
FR (1) FR1590979A (fi)
GB (1) GB1246512A (fi)
NO (1) NO129966B (fi)
SE (1) SE333299B (fi)
SU (1) SU367616A3 (fi)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2135217C3 (de) * 1970-07-24 1974-10-31 Sunds Ab, Sundsvall (Schweden) Verfahren und Vorrichtung zum Bleichen von Fasermaterial, insbesondere von Zellstoffpulpe
US4004967A (en) * 1972-06-22 1977-01-25 Billeruds Aktiebolag Bleaching cellulose pulp with oxygen in the presence of formaldehyde
SE391544C (sv) * 1974-12-10 1985-10-28 Billeruds Ab Sett for forcerad hartsmognad hos vedflis
US4172006A (en) * 1976-08-26 1979-10-23 Weyerhaeuser Company Method of delignifying wood chips with oxygen by adding cooking liquor under pressure
SE422818B (sv) * 1978-03-31 1982-03-29 Modo Chemetrics Ab Forfarande for foredling av allulosamassa genom blekning eller extrahering
US4232416A (en) * 1979-04-13 1980-11-11 Morton Machine Works, Incorporated Process for wetting fiber
US6126781A (en) * 1991-08-01 2000-10-03 Union Camp Patent Holding, Inc. Process for conditioning ozone gas recycle stream in ozone pulp bleaching
CA2078276C (en) * 1992-09-15 2004-05-25 Derek Hornsey Recovery of oxygen-rich gas from ozone bleaching processes
US6221207B1 (en) * 1996-03-26 2001-04-24 Valmet Fibertech Aktiebolag Oxygen delignification of pulp in two stages with low pressure steam heating between stages

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2147618A (en) * 1936-04-01 1939-02-14 West Virginia Pulp & Paper Com Method of bleaching pulp
US2706390A (en) * 1952-10-18 1955-04-19 Kamyr Ab Bleaching plant
US2990710A (en) * 1958-10-13 1961-07-04 Improved Machinery Inc Pulp bleaching apparatus
US3074842A (en) * 1959-07-24 1963-01-22 Dorr Oliver Inc Treatment of unbleached cellulose pulps
US3313678A (en) * 1962-02-14 1967-04-11 Svenska Cellulose Aktiebolaget Bleaching of cellulose pulp in towers in completely filled and closed system

Also Published As

Publication number Publication date
FR1590979A (fi) 1970-04-20
DE1807900A1 (de) 1969-12-11
AT300546B (de) 1972-07-25
US3693380A (en) 1972-09-26
US3668063A (en) 1972-06-06
SU367616A3 (fi) 1973-01-23
NO129966B (fi) 1974-06-17
FI45571B (fi) 1972-04-04
SE333299B (sv) 1971-03-08
GB1246512A (en) 1971-09-15

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