FR1601408A - - Google Patents

Info

Publication number
FR1601408A
FR1601408A FR1601408DA FR1601408A FR 1601408 A FR1601408 A FR 1601408A FR 1601408D A FR1601408D A FR 1601408DA FR 1601408 A FR1601408 A FR 1601408A
Authority
FR
France
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)
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 filed Critical
Application granted granted Critical
Publication of FR1601408A publication Critical patent/FR1601408A/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
    • D21C9/1005—Pretreatment of the pulp, e.g. degassing the pulp
    • 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
    • D21C9/1068—Bleaching ; Apparatus therefor with O2

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
FR1601408D 1967-06-20 1968-06-20 Expired FR1601408A (xx)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ZA673680 1967-06-20
ZA683772 1968-06-13
US16195471A 1971-07-09 1971-07-09

Publications (1)

Publication Number Publication Date
FR1601408A true FR1601408A (xx) 1970-08-24

Family

ID=27388705

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1601408D Expired FR1601408A (xx) 1967-06-20 1968-06-20

Country Status (2)

Country Link
US (1) US3725194A (xx)
FR (1) FR1601408A (xx)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4948902A (xx) * 1972-09-13 1974-05-11
JPS5094201A (xx) * 1974-12-23 1975-07-26
DE2523191A1 (de) * 1974-06-14 1975-12-18 Mo Och Domsjoe Ab Verfahren zur delignizifierung von lignocellulosischem material
JPS5510715B1 (xx) * 1971-06-24 1980-03-18
US5302244A (en) * 1992-02-18 1994-04-12 Domtar Inc. Oxygen delignification of waste cellulosic paper products
US5332471A (en) * 1991-05-21 1994-07-26 Air Products And Chemicals, Inc. Dye stripping by oxygen in secondary fiber recovery

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4594130A (en) * 1978-11-27 1986-06-10 Chang Pei Ching Pulping of lignocellulose with aqueous alcohol and alkaline earth metal salt catalyst
US4431480A (en) * 1981-10-27 1984-02-14 The Black Clawson Company Method and apparatus for controlled addition of alkaline chemicals to an oxygen delignification reaction
NO152907C (no) * 1983-06-29 1985-12-11 Peterson & Son As M Fremgangsmaate til delignifisering av kjemisk masse.
DE3802401A1 (de) * 1988-01-28 1989-08-03 Degussa Verfahren zur herstellung von halbgebleichtem kraftzellstoff
DE3923728A1 (de) * 1989-07-18 1991-01-24 Degussa Verfahren zur stabilisierung der viskositaet von zellstoffen
SE470538C (sv) * 1992-12-02 1996-01-11 Kvaerner Pulping Tech Sätt vid blekning av massa utan användning av klorhaltiga kemikalier
SE9401628L (sv) * 1994-05-10 1995-11-11 Stora Kopparbergs Bergslags Ab Förfarande vid syrgasdelignifiering
US6569284B1 (en) 1996-09-24 2003-05-27 International Paper Company Elemental-chlorine-free bleaching process having an initial Eo or Eop stage
CA2376528A1 (en) * 1999-06-08 2000-12-14 Nana Barde Bleaching pulp with high-pressure o2
US20020129911A1 (en) * 2000-10-16 2002-09-19 Marcoccia Bruno S. Process and configuration for providing external upflow/internal downflow in a continuous digester
US8980051B2 (en) * 2009-04-24 2015-03-17 International Paper Company Sulfonation of pulp produced by alkali pulping process

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2147618A (en) * 1936-04-01 1939-02-14 West Virginia Pulp & Paper Com Method of bleaching pulp
US2466633A (en) * 1948-05-26 1949-04-05 James M Daily Method of bleaching cellulosic pulp
BE526577A (xx) * 1953-02-18
CA632280A (en) * 1958-07-02 1961-12-05 Kimberly-Clark Corporation Manufacture of bleached cellulosic products resistant to brightness reversion
FR1387853A (fr) * 1963-09-19 1965-02-05 Air Liquide Délignification et blanchiment des pâtes cellulosiques chimiques et mi-chimiques
US3382149A (en) * 1964-10-29 1968-05-07 Du Pont Bleaching of hardwood sulfite pulp with hydrogen peroxide, including pretreatment with alkali
US3436302A (en) * 1965-09-02 1969-04-01 Dow Chemical Co Method of bleaching groundwood pulp web with acid

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5510715B1 (xx) * 1971-06-24 1980-03-18
JPS4948902A (xx) * 1972-09-13 1974-05-11
DE2523191A1 (de) * 1974-06-14 1975-12-18 Mo Och Domsjoe Ab Verfahren zur delignizifierung von lignocellulosischem material
JPS5094201A (xx) * 1974-12-23 1975-07-26
JPS5039161B2 (xx) * 1974-12-23 1975-12-15
US5332471A (en) * 1991-05-21 1994-07-26 Air Products And Chemicals, Inc. Dye stripping by oxygen in secondary fiber recovery
US5302244A (en) * 1992-02-18 1994-04-12 Domtar Inc. Oxygen delignification of waste cellulosic paper products

Also Published As

Publication number Publication date
US3725194A (en) 1973-04-03

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