CA1045759A - Bleaching of lignocellulosic material with nitrogen oxides - Google Patents

Bleaching of lignocellulosic material with nitrogen oxides

Info

Publication number
CA1045759A
CA1045759A CA228,164A CA228164A CA1045759A CA 1045759 A CA1045759 A CA 1045759A CA 228164 A CA228164 A CA 228164A CA 1045759 A CA1045759 A CA 1045759A
Authority
CA
Canada
Prior art keywords
treatment
nitric oxide
lignocellulosic material
aqueous medium
oxygen
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
CA228,164A
Other languages
English (en)
French (fr)
Inventor
Andrew E. Yethon
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.)
PPG Architectural Coatings Canada Inc
Original Assignee
Canadian Industries Ltd
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 Canadian Industries Ltd filed Critical Canadian Industries Ltd
Application granted granted Critical
Publication of CA1045759A publication Critical patent/CA1045759A/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
    • D21C9/1063—Bleaching ; Apparatus therefor with compounds not otherwise provided for, e.g. activated gases
    • 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
    • D21C9/1057—Multistage, with compounds cited in more than one sub-group D21C9/10, D21C9/12, D21C9/16

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
CA228,164A 1974-06-11 1975-05-30 Bleaching of lignocellulosic material with nitrogen oxides Expired CA1045759A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB25845/74A GB1505070A (en) 1974-06-11 1974-06-11 Process for bleaching of lignocellulosic material

Publications (1)

Publication Number Publication Date
CA1045759A true CA1045759A (en) 1979-01-09

Family

ID=10234280

Family Applications (1)

Application Number Title Priority Date Filing Date
CA228,164A Expired CA1045759A (en) 1974-06-11 1975-05-30 Bleaching of lignocellulosic material with nitrogen oxides

Country Status (10)

Country Link
JP (1) JPS522003B2 (fi)
BR (1) BR7503680A (fi)
CA (1) CA1045759A (fi)
DE (1) DE2526084C2 (fi)
ES (1) ES438433A1 (fi)
FI (1) FI751734A (fi)
FR (1) FR2274729A1 (fi)
GB (1) GB1505070A (fi)
NO (1) NO147761C (fi)
SE (1) SE7506646L (fi)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1070909A (en) * 1976-05-04 1980-02-05 Canadian Industries Limited Nitrogen dioxide-oxygen delignification
SE421938B (sv) * 1980-06-05 1982-02-08 Mo Och Domsjoe Ab Forfarande for behandling av cellulosamassa med kveveoxider fore syrgasblekning
SE425674B (sv) * 1981-03-23 1982-10-25 Mo Och Domsjoe Ab Forfarande for delignifiering av cellulosamassa med kvevedioxid och syrgas
DE3118384C1 (de) * 1981-05-09 1982-11-11 Mannesmann AG, 4000 Düsseldorf Verfahren zum Bleichen von chemisch hergestelltem Zellstoff mit Ozon
SE448006B (sv) * 1981-09-21 1987-01-12 Mo Och Domsjoe Ab Forfarande for blekning av cellulosamassa innefattande ett aktiveringssteg med kveveoxider
SE450393B (sv) * 1981-10-27 1987-06-22 Mo Och Domsjoe Ab Forfarande for behandling av ved med kveveoxider och syrgas fore sulfatkokning

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE212838C (fi) *
DE204460C (fi) *
DE391713C (de) * 1922-12-12 1924-03-11 Paul Krais Dr Verfahren zum Aufschliessen von Stroh, Schilf u. dgl.

Also Published As

Publication number Publication date
NO752025L (fi) 1975-12-12
FR2274729A1 (fr) 1976-01-09
BR7503680A (pt) 1976-06-29
SE7506646L (sv) 1975-12-12
NO147761B (no) 1983-02-28
GB1505070A (en) 1978-03-22
JPS522003B2 (fi) 1977-01-19
NO147761C (no) 1983-06-08
FI751734A (fi) 1975-12-12
JPS5132802A (fi) 1976-03-19
DE2526084C2 (de) 1981-11-26
ES438433A1 (es) 1977-05-16
FR2274729B1 (fi) 1978-09-22
DE2526084A1 (de) 1976-01-02
AU8201275A (en) 1976-12-16

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