FI935583A - Rikkidioksidin muodostumisen estäminen hierrevalkaisussa - Google Patents

Rikkidioksidin muodostumisen estäminen hierrevalkaisussa Download PDF

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Publication number
FI935583A
FI935583A FI935583A FI935583A FI935583A FI 935583 A FI935583 A FI 935583A FI 935583 A FI935583 A FI 935583A FI 935583 A FI935583 A FI 935583A FI 935583 A FI935583 A FI 935583A
Authority
FI
Finland
Prior art keywords
sulfur dioxide
bleaching
pulverized
prevention
dioxide formation
Prior art date
Application number
FI935583A
Other languages
English (en)
Swedish (sv)
Other versions
FI935583A0 (fi
Inventor
Jeffrey Nye
Martin G Fairbank
Original Assignee
Hoechst Celanese Corp
Abitibi Price Inc
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 Hoechst Celanese Corp, Abitibi Price Inc filed Critical Hoechst Celanese Corp
Publication of FI935583A0 publication Critical patent/FI935583A0/fi
Publication of FI935583A publication Critical patent/FI935583A/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
    • D21C9/1084—Bleaching ; Apparatus therefor with reducing compounds
    • D21C9/1089—Bleaching ; Apparatus therefor with reducing compounds with dithionites
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
    • D21B1/14—Disintegrating in mills
    • D21B1/16—Disintegrating in mills in the presence of chemical agents

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Paper (AREA)
  • Detergent Compositions (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
  • Micro-Organisms Or Cultivation Processes Thereof (AREA)
  • Processing Of Solid Wastes (AREA)
FI935583A 1992-12-14 1993-12-13 Rikkidioksidin muodostumisen estäminen hierrevalkaisussa FI935583A (fi)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US99034892A 1992-12-14 1992-12-14
US5512193A 1993-04-30 1993-04-30

Publications (2)

Publication Number Publication Date
FI935583A0 FI935583A0 (fi) 1993-12-13
FI935583A true FI935583A (fi) 1994-06-15

Family

ID=26733862

Family Applications (1)

Application Number Title Priority Date Filing Date
FI935583A FI935583A (fi) 1992-12-14 1993-12-13 Rikkidioksidin muodostumisen estäminen hierrevalkaisussa

Country Status (10)

Country Link
US (1) US5607547A (fi)
EP (1) EP0604088B1 (fi)
JP (1) JPH073684A (fi)
AT (1) ATE159063T1 (fi)
BR (1) BR9305032A (fi)
CA (1) CA2111261A1 (fi)
DE (1) DE69314446T2 (fi)
DK (1) DK0604088T3 (fi)
FI (1) FI935583A (fi)
NO (1) NO934597L (fi)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2432459A1 (en) * 2002-06-28 2003-12-28 Rohm And Haas Company Method for brightening pulp with hydrosulfite solutions
JP5371955B2 (ja) * 2007-04-24 2013-12-18 ビーエーエスエフ ソシエタス・ヨーロピア 漂白された木材粒子及び淡色ないし白色の木材料の製造方法
EP2924166A1 (de) * 2014-03-25 2015-09-30 Basf Se Verfahren zur Herstellung von gebleichtem Holzfaserstoff

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2883826A (en) * 1953-01-07 1959-04-28 Univ Minnesota Process for conditioning plant fibers for spinning
US3013931A (en) * 1957-02-01 1961-12-19 Hawaiian Dev Company Ltd Printing paper and process of making the same
SE303088B (fi) * 1963-05-31 1968-08-12 Defibrator Ab
US3804944A (en) * 1970-10-02 1974-04-16 Virginia Chemicals Inc Sodium dithionite solution stablization
DE2107959A1 (de) * 1971-02-19 1972-08-31 Basf Ag Stabilisierte Natriumdithionitzubereitungen
US3985674A (en) * 1974-12-10 1976-10-12 Virginia Chemicals Inc. Stabilized sodium dithionite solutions
US4411737A (en) * 1979-12-13 1983-10-25 Owens-Illinois, Inc. Pulp treating process
US4534954A (en) * 1982-08-17 1985-08-13 Virginia Chemicals Inc. Sodium hydrosulfite slurries
DE3406322A1 (de) * 1984-02-22 1985-08-22 Basf Ag, 6700 Ludwigshafen Stabilisierte, wasser enthaltende, alkalisch eingestellte natriumdithionitzubereitungen
GB2215350B (en) * 1988-03-16 1992-05-20 Thiokol Morton Inc Process for bleaching mechanical wood pulp
DE4115575A1 (de) * 1991-05-13 1992-11-19 Brueggemann L Kg Bleichmittel

Also Published As

Publication number Publication date
EP0604088B1 (en) 1997-10-08
NO934597L (no) 1994-06-15
CA2111261A1 (en) 1994-06-15
EP0604088A1 (en) 1994-06-29
JPH073684A (ja) 1995-01-06
DK0604088T3 (da) 1997-10-27
NO934597D0 (no) 1993-12-14
DE69314446T2 (de) 1998-03-19
ATE159063T1 (de) 1997-10-15
US5607547A (en) 1997-03-04
BR9305032A (pt) 1994-06-21
FI935583A0 (fi) 1993-12-13
DE69314446D1 (de) 1997-11-13

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Legal Events

Date Code Title Description
FD Application lapsed