AT302013B - Process for bleaching lignocellulosic material - Google Patents

Process for bleaching lignocellulosic material

Info

Publication number
AT302013B
AT302013B AT1142270A AT1142270A AT302013B AT 302013 B AT302013 B AT 302013B AT 1142270 A AT1142270 A AT 1142270A AT 1142270 A AT1142270 A AT 1142270A AT 302013 B AT302013 B AT 302013B
Authority
AT
Austria
Prior art keywords
lignocellulosic material
bleaching lignocellulosic
bleaching
lignocellulosic
Prior art date
Application number
AT1142270A
Other languages
German (de)
Original Assignee
Canadian Ind
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 Ind filed Critical Canadian Ind
Application granted granted Critical
Publication of AT302013B publication Critical patent/AT302013B/en

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)
AT1142270A 1969-12-19 1970-12-18 Process for bleaching lignocellulosic material AT302013B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA70450 1969-12-19

Publications (1)

Publication Number Publication Date
AT302013B true AT302013B (en) 1972-09-25

Family

ID=4086085

Family Applications (1)

Application Number Title Priority Date Filing Date
AT1142270A AT302013B (en) 1969-12-19 1970-12-18 Process for bleaching lignocellulosic material

Country Status (10)

Country Link
AT (1) AT302013B (en)
CA (1) CA897361A (en)
DE (1) DE2061526C3 (en)
FI (1) FI49994C (en)
FR (1) FR2071947B1 (en)
GB (1) GB1342580A (en)
NO (1) NO129262B (en)
SE (1) SE369746B (en)
SU (1) SU366622A3 (en)
ZA (1) ZA708076B (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2416297A1 (en) * 1978-01-31 1979-08-31 Europeen Cellulose Three-stage paper pulp bleaching - giving high whiteness level, by treating with chlorine, hypochlorite or peroxide oxidant and chlorine di:oxide
FR2432574A1 (en) * 1978-08-01 1980-02-29 Europeen Cellulose PROCESS FOR BLEACHING PAPER PULP
FI67241B (en) * 1981-06-10 1984-10-31 Aga Ab SAETT FOER BLEKNING AV CELLULOSAHALTIGA MATERIAL
BR8109039A (en) * 1981-09-04 1983-09-06 Weyerhaeuser Co PULP TREATMENT WITH OXYGEN
NZ237019A (en) * 1990-02-19 1992-11-25 Amcor Ltd Bleaching paper pulp by initially treating with oxygen and/or hydrogen peroxide and subsequently treating with a bleaching agent without intervening washing steps
FR2670513B1 (en) * 1990-12-18 1993-02-19 Centre Tech Ind Papier PROCESS FOR BLEACHING CHEMICAL PAPER PULP BY TWO-STAGE OXYGEN TREATMENT.
SE9401628L (en) * 1994-05-10 1995-11-11 Stora Kopparbergs Bergslags Ab Oxygen delignification procedure

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1310248A (en) * 1963-03-06
FR1404605A (en) * 1964-05-22 1965-07-02 Air Liquide Improvement in delignification of chemical cellulose pulps
SE334286B (en) * 1968-12-05 1971-04-19 Mo Och Domsjoe Ab

Also Published As

Publication number Publication date
ZA708076B (en) 1972-07-26
CA897361A (en) 1972-04-11
SE369746B (en) 1974-09-16
DE2061526A1 (en) 1971-06-24
FI49994B (en) 1975-07-31
FI49994C (en) 1975-11-10
NO129262B (en) 1974-03-18
DE2061526C3 (en) 1975-06-05
FR2071947A1 (en) 1971-09-24
SU366622A3 (en) 1973-01-16
GB1342580A (en) 1974-01-03
FR2071947B1 (en) 1974-04-26
DE2061526B2 (en) 1974-09-19

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Legal Events

Date Code Title Description
ELJ Ceased due to non-payment of the annual fee