CA980513A - Bleaching of waste paper pulp - Google Patents

Bleaching of waste paper pulp

Info

Publication number
CA980513A
CA980513A CA155,695A CA155695A CA980513A CA 980513 A CA980513 A CA 980513A CA 155695 A CA155695 A CA 155695A CA 980513 A CA980513 A CA 980513A
Authority
CA
Canada
Prior art keywords
bleaching
paper pulp
waste paper
waste
pulp
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
CA155,695A
Other versions
CA155695S (en
Inventor
Ralph Simonette
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.)
Occidental Chemical Corp
Original Assignee
Hooker Chemicals and Plastics Corp
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 Hooker Chemicals and Plastics Corp filed Critical Hooker Chemicals and Plastics Corp
Application granted granted Critical
Publication of CA980513A publication Critical patent/CA980513A/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
    • D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
    • D21C5/02—Working-up waste paper
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/64—Paper recycling

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
CA155,695A 1971-11-10 1972-11-06 Bleaching of waste paper pulp Expired CA980513A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US19748571A 1971-11-10 1971-11-10

Publications (1)

Publication Number Publication Date
CA980513A true CA980513A (en) 1975-12-30

Family

ID=22729602

Family Applications (1)

Application Number Title Priority Date Filing Date
CA155,695A Expired CA980513A (en) 1971-11-10 1972-11-06 Bleaching of waste paper pulp

Country Status (8)

Country Link
JP (1) JPS4861706A (en)
BE (1) BE791246A (en)
CA (1) CA980513A (en)
DE (1) DE2254862A1 (en)
FR (1) FR2160058A5 (en)
GB (1) GB1396139A (en)
IT (1) IT970342B (en)
NL (1) NL7214950A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4244777A (en) 1979-11-07 1981-01-13 Weyerhaeuser Company Bleaching stilbene yellow dyed wood pulp
DE3937932A1 (en) * 1989-11-15 1991-05-16 Holtzmann & Cie Ag E Delignification and bleaching of pulp with alkali chlorite - by adding chlorite before acidification to produce nascent reagent, minimising pollution
JPH03294589A (en) * 1990-04-09 1991-12-25 Sanyo Kokusaku Pulp Co Ltd Treatment of unclassified waste information-recording paper
JPH0819630B2 (en) * 1991-07-29 1996-02-28 日本製紙株式会社 Method of erasing fluorescence in waste paper
US6315863B1 (en) 1998-06-18 2001-11-13 Weyerhaeuser Company Chlorine dioxide pulp bleaching process having reduced barium scaling by recycling post-chlorination waste filtrate
US7377993B2 (en) * 2004-03-03 2008-05-27 Tanya Smith Richardson Methods for reducing fluorescence in pulp and paper
CN103526629B (en) * 2013-10-23 2014-12-31 齐鲁工业大学 Pulping process of waste paper with high wet strength

Also Published As

Publication number Publication date
GB1396139A (en) 1975-06-04
JPS4861706A (en) 1973-08-29
IT970342B (en) 1974-04-10
DE2254862A1 (en) 1973-05-17
BE791246A (en) 1973-05-10
NL7214950A (en) 1973-05-14
FR2160058A5 (en) 1973-06-22

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