CA1062858A - Oxygen bleaching of pulp in presence of high-silica protector - Google Patents

Oxygen bleaching of pulp in presence of high-silica protector

Info

Publication number
CA1062858A
CA1062858A CA234,066A CA234066A CA1062858A CA 1062858 A CA1062858 A CA 1062858A CA 234066 A CA234066 A CA 234066A CA 1062858 A CA1062858 A CA 1062858A
Authority
CA
Canada
Prior art keywords
pulp
bleaching
oxygen
semi
protector
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
CA234,066A
Other languages
English (en)
French (fr)
Inventor
James C. M. Hou
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.)
Potlatch Corp
Original Assignee
Potlatch 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 Potlatch Corp filed Critical Potlatch Corp
Application granted granted Critical
Publication of CA1062858A publication Critical patent/CA1062858A/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)
CA234,066A 1975-02-18 1975-08-25 Oxygen bleaching of pulp in presence of high-silica protector Expired CA1062858A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US55027475A 1975-02-18 1975-02-18

Publications (1)

Publication Number Publication Date
CA1062858A true CA1062858A (en) 1979-09-25

Family

ID=24196466

Family Applications (1)

Application Number Title Priority Date Filing Date
CA234,066A Expired CA1062858A (en) 1975-02-18 1975-08-25 Oxygen bleaching of pulp in presence of high-silica protector

Country Status (7)

Country Link
JP (1) JPS5220562B2 (it)
CA (1) CA1062858A (it)
DE (1) DE2552931A1 (it)
FR (1) FR2301632A1 (it)
GB (1) GB1519072A (it)
SE (1) SE7600243L (it)
ZA (1) ZA76274B (it)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007036376A1 (de) * 2007-07-31 2009-02-05 Voith Patent Gmbh Gebleichter Faserstoff
SE543640C2 (en) * 2019-09-04 2021-05-11 Stora Enso Oyj Fluff pulp from oxygen delignified pulp

Also Published As

Publication number Publication date
FR2301632B1 (it) 1980-06-20
DE2552931A1 (de) 1976-09-02
SE7600243L (sv) 1976-08-19
JPS5196505A (it) 1976-08-24
FR2301632A1 (fr) 1976-09-17
ZA76274B (en) 1976-12-29
JPS5220562B2 (it) 1977-06-04
GB1519072A (en) 1978-07-26

Similar Documents

Publication Publication Date Title
US5310458A (en) Process for bleaching lignocellulose-containing pulps
US4626319A (en) Process for the delignification and acid bleaching of cellulose with oxygen and hydrogen peroxide
US3888727A (en) Treatment of lignocellulosic material in an alkaline pulping liquor containing anthraquinone sulphonic acid followed by oxygen delignification
US4462864A (en) Process for the delignification of unbleached chemical pulp
US6464827B1 (en) Method of digesting wood with an alkaline liquor by adding an acidic agent to precipitate dissociated lignin
US3725194A (en) Treatment of alkaline pulp with an acidic medium followed by oxygen bleaching and delignification
US5234544A (en) Cleaning and bleaching of secondary fiber
CA2100361C (en) Bleaching of lignocellulosic material with activated oxygen
KR930002072B1 (ko) 과산화수소 강화된 산소 탈리그닌화 방법
CA1062858A (en) Oxygen bleaching of pulp in presence of high-silica protector
US3740310A (en) Delignification and bleaching of cellulosic pulp containing protectorwith oxygen in the presence of alkali
US3657065A (en) Delignification and bleaching of cellulose pulp with oxygen gas in an allsaline medium in the presence of a protector
CA1070909A (en) Nitrogen dioxide-oxygen delignification
CA2044100A1 (en) Biobleaching process
AU607026B2 (en) Process for producing semibleached kraft pulp
US4537656A (en) Method for delignifying or bleaching cellulose pulp wherein chlorine is added to recycle liquor to regenerate chlorine dioxide
US6042690A (en) Method for the bleaching of pulp in a D2D sequence wherein the effluent contains reduced colored matter
Patt et al. The role of ozone in chemical pulp bleaching
EP0206560A2 (en) Alkaline-peroxide-oxygen treatment for unbleached and chlorinated chemical pulps
US4132589A (en) Delignification and bleaching of cellulose pulp
CA1080406A (en) Bleach hydrolysis of pulp with substantially reduced use of chlorine
US4657633A (en) Delignification and bleaching of a cellulose pulp with an alkalioxygen-hypochlorite single stage sequential extraction
US4487656A (en) Process for bleaching paper pulp using melamine as a viscosity stabilizer
US4729817A (en) Process for the oxidative delignification of demethylated chemical pulp
CA1120210A (en) Bleaching of pulp