CA1031906A - Contacting cellulosic pulps with gaseous chlorine to accomplish bleaching - Google Patents

Contacting cellulosic pulps with gaseous chlorine to accomplish bleaching

Info

Publication number
CA1031906A
CA1031906A CA206,599A CA206599A CA1031906A CA 1031906 A CA1031906 A CA 1031906A CA 206599 A CA206599 A CA 206599A CA 1031906 A CA1031906 A CA 1031906A
Authority
CA
Canada
Prior art keywords
gaseous chlorine
cellulosic pulps
bleaching
accomplish
contacting cellulosic
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
CA206,599A
Other languages
French (fr)
Other versions
CA206599S (en
Inventor
William R. Dial
Claud B. Christiansen
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.)
PPG Industries Inc
Original Assignee
PPG Industries 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 PPG Industries Inc filed Critical PPG Industries Inc
Application granted granted Critical
Publication of CA1031906A publication Critical patent/CA1031906A/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
    • D21C9/12—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds
    • D21C9/14—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites
    • D21C9/142—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites with ClO2/Cl2 in a multistage process involving ClO2/Cl2 exclusively

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Artificial Filaments (AREA)
  • Paper (AREA)
CA206,599A 1973-10-23 1974-08-08 Contacting cellulosic pulps with gaseous chlorine to accomplish bleaching Expired CA1031906A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US408770A US3907632A (en) 1973-10-23 1973-10-23 Bleaching cellulosic pulps with gaseous chlorine at a pH of 7 to 10 in a multistage bleaching process

Publications (1)

Publication Number Publication Date
CA1031906A true CA1031906A (en) 1978-05-30

Family

ID=23617694

Family Applications (1)

Application Number Title Priority Date Filing Date
CA206,599A Expired CA1031906A (en) 1973-10-23 1974-08-08 Contacting cellulosic pulps with gaseous chlorine to accomplish bleaching

Country Status (5)

Country Link
US (1) US3907632A (en)
CA (1) CA1031906A (en)
FI (1) FI279974A (en)
NO (1) NO143432C (en)
SE (1) SE411235B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2436843A1 (en) * 1974-07-31 1976-02-12 Akzo Gmbh MIXTURE OF OXYDATION PRODUCTS OF CELLULOSE, HEMICELLULOSE AND LIGNIN
CN103757963B (en) * 2014-01-07 2015-09-16 昆明理工大学 The method of a kind of chlorine dioxide gas phase bleaching jute skin fiber processed

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2968589A (en) * 1958-03-17 1961-01-17 Kimberly Clark Co Continuous pulp bleaching method
SE314286B (en) * 1964-08-07 1969-09-01 Pulp Paper Res Inst
US3433702A (en) * 1965-06-28 1969-03-18 Hooker Chemical Corp Woodpulp bleaching process
US3579419A (en) * 1967-04-24 1971-05-18 Pulp Paper Res Inst Treatment of fluffed pulp fibers with gaseous chlorine
US3630828A (en) * 1968-05-13 1971-12-28 Pulp Paper Res Inst Bleaching of a low-density, substantially uncompacted, porous fluffed cellulosic pulp
GB1242709A (en) * 1968-12-16 1971-08-11 Pulp Paper Res Inst Bleaching of cellulosic pulp
US3501374A (en) * 1968-12-26 1970-03-17 Hooker Chemical Corp Sequential bleaching of kraft pulp with chlorine dioxide and chlorine

Also Published As

Publication number Publication date
NO743153L (en) 1975-05-20
US3907632A (en) 1975-09-23
SE7413054L (en) 1975-04-24
NO143432B (en) 1980-11-03
SE411235B (en) 1979-12-10
NO143432C (en) 1981-02-11
FI279974A (en) 1975-04-24

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