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CA864409A - Pulp bleaching process - Google Patents

Pulp bleaching process

Info

Publication number
CA864409A
CA864409A CA864409A CA864409DA CA864409A CA 864409 A CA864409 A CA 864409A CA 864409 A CA864409 A CA 864409A CA 864409D A CA864409D A CA 864409DA CA 864409 A CA864409 A CA 864409A
Authority
CA
Canada
Prior art keywords
bleaching process
pulp bleaching
pulp
bleaching
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
CA864409A
Inventor
H. Andrews Douglas
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 Architectural Coatings Canada Inc
Original Assignee
Canadian Industries Ltd
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 Canadian Industries Ltd filed Critical Canadian Industries Ltd
Application granted granted Critical
Publication of CA864409A publication Critical patent/CA864409A/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
    • D21C9/144—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites with ClO2/Cl2 and other bleaching agents in a multistage process

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
CA864409A 1969-04-14 1969-04-14 Pulp bleaching process Expired CA864409A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA48671 1969-04-14

Publications (1)

Publication Number Publication Date
CA864409A true CA864409A (en) 1971-02-23

Family

ID=4085142

Family Applications (1)

Application Number Title Priority Date Filing Date
CA864409A Expired CA864409A (en) 1969-04-14 1969-04-14 Pulp bleaching process

Country Status (3)

Country Link
US (1) US3622444A (en)
CA (1) CA864409A (en)
ZA (1) ZA702034B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4118271A (en) * 1972-03-25 1978-10-03 Jujo Paper Co., Ltd. Method for the preparation of a pulp
US3884752A (en) * 1973-09-17 1975-05-20 Int Paper Co Single vessel wood pulp bleaching with chlorine dioxide followed by sodium hypochlorite or alkaline extraction
US4002526A (en) * 1975-10-10 1977-01-11 International Paper Company Oxygen-alkali delignification of low consistency wood pulp
AU3102077A (en) * 1976-12-01 1979-06-07 New Zealand Dev Finance Treating lignocellulosic or cellulosic pulp
US4244780A (en) * 1979-11-15 1981-01-13 Nalco Chemical Company Use of thiourea dioxide in pulp bleaching processes to preserve pulp strength and aid in brightness
JP2004522008A (en) * 2001-06-06 2004-07-22 クヴアナ・パルピング・アクチボラグ Reduction of organically bound chlorine formed by chlorine dioxide bleaching

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE436804C (en) * 1924-05-22 1926-11-09 Erich Opfermann Dr Process for bleaching pulp
US1787395A (en) * 1927-12-19 1930-12-30 Rys Ladislav Method for bleaching cellulose of any kind
US1957938A (en) * 1931-12-09 1934-05-08 Int Paper Co Bleaching process
US2587064A (en) * 1949-03-09 1952-02-26 Int Paper Canada Method of bleaching wood pulp
US3020196A (en) * 1960-08-05 1962-02-06 Allied Chem Production of high brightness high strength wood pulps
US3020197A (en) * 1960-08-05 1962-02-06 Allied Chem Method for production of high brightness high strength wood pulps

Also Published As

Publication number Publication date
ZA702034B (en) 1971-11-24
US3622444A (en) 1971-11-23

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