CA968507A - Bleaching of mechanical pulps - Google Patents

Bleaching of mechanical pulps

Info

Publication number
CA968507A
CA968507A CA134,166A CA134166A CA968507A CA 968507 A CA968507 A CA 968507A CA 134166 A CA134166 A CA 134166A CA 968507 A CA968507 A CA 968507A
Authority
CA
Canada
Prior art keywords
bleaching
mechanical pulps
pulps
mechanical
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
CA134,166A
Other versions
CA134166S (en
Inventor
Virendra N. Gupta
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.)
International Paper Canada Inc
Original Assignee
International Paper Canada 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 International Paper Canada Inc filed Critical International Paper Canada Inc
Application granted granted Critical
Publication of CA968507A publication Critical patent/CA968507A/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
    • D21C9/1026—Other features in bleaching processes
    • D21C9/1036—Use of compounds accelerating or improving the efficiency of the processes

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
CA134,166A 1971-11-17 1972-02-08 Bleaching of mechanical pulps Expired CA968507A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US19975071A 1971-11-17 1971-11-17

Publications (1)

Publication Number Publication Date
CA968507A true CA968507A (en) 1975-06-03

Family

ID=22738865

Family Applications (1)

Application Number Title Priority Date Filing Date
CA134,166A Expired CA968507A (en) 1971-11-17 1972-02-08 Bleaching of mechanical pulps

Country Status (3)

Country Link
US (1) US3709779A (en)
CA (1) CA968507A (en)
SE (1) SE389137B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3830690A (en) * 1972-08-03 1974-08-20 Virginia Chemicals Inc Groundwood pulp bleaching with sodium hydrosulfite in the presence of sodium salts of glucono-citrate complexes of polyaminoversenic acid
US3874993A (en) * 1972-10-06 1975-04-01 Virginia Chemicals Inc Groundwood pulp bleaching with sodium hydrosulfite in the presence of benzene polycarboxylates
DE4118899C1 (en) * 1991-06-08 1992-10-22 Degussa Ag, 6000 Frankfurt, De
US5591045A (en) * 1995-05-18 1997-01-07 The Whitaker Corporation Wire connecting system
EP1418269B1 (en) * 2002-11-05 2009-02-11 Rohm And Haas Company Method for brightening virgin mechanical pulp

Also Published As

Publication number Publication date
US3709779A (en) 1973-01-09
SE389137B (en) 1976-10-25

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