FR949704A - Perfectionnements apportés au blanchiment des pâtes mécaniques - Google Patents

Perfectionnements apportés au blanchiment des pâtes mécaniques

Info

Publication number
FR949704A
FR949704A FR949704DA FR949704A FR 949704 A FR949704 A FR 949704A FR 949704D A FR949704D A FR 949704DA FR 949704 A FR949704 A FR 949704A
Authority
FR
France
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
Other languages
English (en)
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.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
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 EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Application granted granted Critical
Publication of FR949704A publication Critical patent/FR949704A/fr
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
    • D21C9/16—Bleaching ; Apparatus therefor with per compounds
    • D21C9/163—Bleaching ; Apparatus therefor with per compounds with peroxides

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
FR949704D 1939-09-29 1947-07-03 Perfectionnements apportés au blanchiment des pâtes mécaniques Expired FR949704A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US297150A US2199376A (en) 1939-09-29 1939-09-29 Bleaching of ground wood pulp

Publications (1)

Publication Number Publication Date
FR949704A true FR949704A (fr) 1949-09-07

Family

ID=23145067

Family Applications (1)

Application Number Title Priority Date Filing Date
FR949704D Expired FR949704A (fr) 1939-09-29 1947-07-03 Perfectionnements apportés au blanchiment des pâtes mécaniques

Country Status (3)

Country Link
US (1) US2199376A (fr)
FR (1) FR949704A (fr)
GB (1) GB632967A (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE931690C (de) * 1942-12-24 1955-08-16 Degussa Verfahren zum Bleichen von Holzschliff und anderem mechanisch erzeugtem Fasermaterial
US2450034A (en) * 1943-12-01 1948-09-28 Int Paper Co Groundwood bleaching by hydrosulfite
US2465738A (en) * 1945-12-22 1949-03-29 Buffalo Electro Chem Co Method of bleaching mechanical wood fibers
US2687943A (en) * 1951-06-26 1954-08-31 Du Pont Bleaching of mechanical wood pulp
DE4035813A1 (de) * 1990-11-10 1992-05-14 Akzo Gmbh Sauerstoffbleichung
FR2729096A1 (fr) * 1995-01-06 1996-07-12 Atochem Elf Sa Procede de blanchiment d'une poudre vegetale micronisee

Also Published As

Publication number Publication date
US2199376A (en) 1940-04-30
GB632967A (en) 1949-12-05

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