FR917993A - Improvements in the treatment of crushed wood pulp - Google Patents

Improvements in the treatment of crushed wood pulp

Info

Publication number
FR917993A
FR917993A FR917993DA FR917993A FR 917993 A FR917993 A FR 917993A FR 917993D A FR917993D A FR 917993DA FR 917993 A FR917993 A FR 917993A
Authority
FR
France
Prior art keywords
treatment
wood pulp
crushed wood
crushed
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
Other languages
French (fr)
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.)
BUFFALO ELECTRO CHEM CO
Original Assignee
BUFFALO ELECTRO CHEM 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 BUFFALO ELECTRO CHEM CO filed Critical BUFFALO ELECTRO CHEM CO
Application granted granted Critical
Publication of FR917993A publication Critical patent/FR917993A/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
    • D21C9/08—Removal of fats, resins, pitch or waxes; Chemical or physical purification, i.e. refining, of crude cellulose by removing non-cellulosic contaminants, optionally combined with bleaching
    • 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
    • D21C9/1005—Pretreatment of the pulp, e.g. degassing the pulp

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
FR917993D 1945-02-05 1945-11-26 Improvements in the treatment of crushed wood pulp Expired FR917993A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US917993XA 1945-02-05 1945-02-05
US251134XA 1945-02-05 1945-02-05

Publications (1)

Publication Number Publication Date
FR917993A true FR917993A (en) 1947-01-27

Family

ID=32965103

Family Applications (1)

Application Number Title Priority Date Filing Date
FR917993D Expired FR917993A (en) 1945-02-05 1945-11-26 Improvements in the treatment of crushed wood pulp

Country Status (2)

Country Link
FR (1) FR917993A (en)
GB (1) GB601292A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2687943A (en) * 1951-06-26 1954-08-31 Du Pont Bleaching of mechanical wood pulp

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4114134A1 (en) * 1991-04-30 1992-11-05 Sueddeutsche Kalkstickstoff Chlorine-free bleaching and delignifying of alkali cellulose - by bleaching with aq. peracid, extracting with alkaline soln.,bleaching with aq. peracid and bleaching twice with cyanamide-activated hydrogen peroxide soln.
DE4114135A1 (en) * 1991-04-30 1992-11-05 Sueddeutsche Kalkstickstoff Chlorine-free bleaching and delignification of alkali cellulose - by first treating with aq. organic peracid soln. and then with cyanamide (salt) activated hydrogen peroxide soln.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2687943A (en) * 1951-06-26 1954-08-31 Du Pont Bleaching of mechanical wood pulp

Also Published As

Publication number Publication date
GB601292A (en) 1948-05-03

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