GB1246512A - Improvements in or relating to the bleaching of cellulose pulp - Google Patents

Improvements in or relating to the bleaching of cellulose pulp

Info

Publication number
GB1246512A
GB1246512A GB53053/68A GB5305368A GB1246512A GB 1246512 A GB1246512 A GB 1246512A GB 53053/68 A GB53053/68 A GB 53053/68A GB 5305368 A GB5305368 A GB 5305368A GB 1246512 A GB1246512 A GB 1246512A
Authority
GB
United Kingdom
Prior art keywords
pulp
bleaching
tower
conduit
gaseous
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
GB53053/68A
Other languages
English (en)
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.)
Valmet AB
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 GB1246512A publication Critical patent/GB1246512A/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
    • D21C9/1005—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)
GB53053/68A 1967-11-10 1968-11-08 Improvements in or relating to the bleaching of cellulose pulp Expired GB1246512A (en)

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 (1)

Publication Number Publication Date
GB1246512A true GB1246512A (en) 1971-09-15

Family

ID=20300683

Family Applications (1)

Application Number Title Priority Date Filing Date
GB53053/68A Expired GB1246512A (en) 1967-11-10 1968-11-08 Improvements in or relating to the bleaching of cellulose pulp

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
WO1997036042A1 (en) * 1996-03-26 1997-10-02 Sunds Defibrator Industries Ab Oxygen delignification of pulp in two 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
FI45571B (fi) 1972-04-04
FI45571C (fi) 1972-07-10
SU367616A3 (fi) 1973-01-23
AT300546B (de) 1972-07-25
DE1807900A1 (de) 1969-12-11
US3693380A (en) 1972-09-26
SE333299B (sv) 1971-03-08
NO129966B (fi) 1974-06-17
US3668063A (en) 1972-06-06
FR1590979A (fi) 1970-04-20

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