FR2350421A1 - Procede de delignification utilisant successivement du bioxyde d'azote et de l'oxygene - Google Patents

Procede de delignification utilisant successivement du bioxyde d'azote et de l'oxygene

Info

Publication number
FR2350421A1
FR2350421A1 FR7713425A FR7713425A FR2350421A1 FR 2350421 A1 FR2350421 A1 FR 2350421A1 FR 7713425 A FR7713425 A FR 7713425A FR 7713425 A FR7713425 A FR 7713425A FR 2350421 A1 FR2350421 A1 FR 2350421A1
Authority
FR
France
Prior art keywords
delignification
treatment
nitrogen dioxide
lignocellulose
reduce pollution
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.)
Granted
Application number
FR7713425A
Other languages
English (en)
French (fr)
Other versions
FR2350421B1 (xx
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
Publication of FR2350421A1 publication Critical patent/FR2350421A1/fr
Application granted granted Critical
Publication of FR2350421B1 publication Critical patent/FR2350421B1/fr
Granted 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
    • D21C9/1057—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)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
FR7713425A 1976-05-04 1977-05-03 Procede de delignification utilisant successivement du bioxyde d'azote et de l'oxygene Granted FR2350421A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA251,752A CA1070909A (en) 1976-05-04 1976-05-04 Nitrogen dioxide-oxygen delignification

Publications (2)

Publication Number Publication Date
FR2350421A1 true FR2350421A1 (fr) 1977-12-02
FR2350421B1 FR2350421B1 (xx) 1982-08-13

Family

ID=4105864

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7713425A Granted FR2350421A1 (fr) 1976-05-04 1977-05-03 Procede de delignification utilisant successivement du bioxyde d'azote et de l'oxygene

Country Status (12)

Country Link
JP (1) JPS52134690A (xx)
AU (1) AU498646B2 (xx)
BR (1) BR7702713A (xx)
CA (1) CA1070909A (xx)
DE (1) DE2717257A1 (xx)
ES (1) ES458434A1 (xx)
FI (1) FI771383A (xx)
FR (1) FR2350421A1 (xx)
NO (1) NO771297L (xx)
NZ (1) NZ183555A (xx)
SE (1) SE7705136L (xx)
ZA (1) ZA771424B (xx)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2496138A1 (fr) * 1980-12-17 1982-06-18 Mo Och Domsjoe Ab Procede de blanchiment de pate de cellulose
FR2519041A1 (fr) * 1981-12-30 1983-07-01 Mo Och Domsjoe Ab Procede de delignification de pate cellulosique

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE441192B (sv) * 1980-05-27 1985-09-16 Mo Och Domsjoe Ab Forfarande for delignifiering av kemisk cellulosamassa med syrgas i nervaro av ett eller flera neutralisationsmedel
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
JP2002302888A (ja) * 2001-04-05 2002-10-18 Oji Paper Co Ltd 漂白パルプの製造方法
FI20115754A0 (fi) * 2011-03-22 2011-07-15 Andritz Oy Menetelmä ja järjestely kemiallisen massan käsittelemiseksi

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2274729A1 (fr) * 1974-06-11 1976-01-09 Canadian Ind Procede de blanchiment de matieres lignocellulosiques

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2274729A1 (fr) * 1974-06-11 1976-01-09 Canadian Ind Procede de blanchiment de matieres lignocellulosiques

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2496138A1 (fr) * 1980-12-17 1982-06-18 Mo Och Domsjoe Ab Procede de blanchiment de pate de cellulose
FR2519041A1 (fr) * 1981-12-30 1983-07-01 Mo Och Domsjoe Ab Procede de delignification de pate cellulosique

Also Published As

Publication number Publication date
SE7705136L (sv) 1977-11-05
NO771297L (no) 1977-11-07
ZA771424B (en) 1978-02-22
AU498646B2 (en) 1979-03-22
AU2311177A (en) 1978-09-14
NZ183555A (en) 1978-11-13
FI771383A (xx) 1977-11-05
JPS52134690A (en) 1977-11-11
DE2717257A1 (de) 1977-11-17
CA1070909A (en) 1980-02-05
ES458434A1 (es) 1978-03-16
FR2350421B1 (xx) 1982-08-13
BR7702713A (pt) 1978-03-21

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Legal Events

Date Code Title Description
ST Notification of lapse