CA1036758A - Method of delignification of cellulosic material in alkaline medium using oxygen - Google Patents

Method of delignification of cellulosic material in alkaline medium using oxygen

Info

Publication number
CA1036758A
CA1036758A CA210,399A CA210399A CA1036758A CA 1036758 A CA1036758 A CA 1036758A CA 210399 A CA210399 A CA 210399A CA 1036758 A CA1036758 A CA 1036758A
Authority
CA
Canada
Prior art keywords
aqueous medium
alkaline aqueous
delignification
cellulosic material
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
CA210,399A
Other languages
English (en)
French (fr)
Inventor
Saisei Miyao
Katsuhiko Takeda
Tadashi Nagano
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.)
Toyo Pulp Co Ltd
Original Assignee
Toyo Pulp Co 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 Toyo Pulp Co Ltd filed Critical Toyo Pulp Co Ltd
Application granted granted Critical
Publication of CA1036758A publication Critical patent/CA1036758A/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
    • D21C9/1068—Bleaching ; Apparatus therefor with O2

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
CA210,399A 1974-02-18 1974-09-30 Method of delignification of cellulosic material in alkaline medium using oxygen Expired CA1036758A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP49019287A JPS5241361B2 (fi) 1974-02-18 1974-02-18

Publications (1)

Publication Number Publication Date
CA1036758A true CA1036758A (en) 1978-08-22

Family

ID=11995220

Family Applications (1)

Application Number Title Priority Date Filing Date
CA210,399A Expired CA1036758A (en) 1974-02-18 1974-09-30 Method of delignification of cellulosic material in alkaline medium using oxygen

Country Status (9)

Country Link
JP (1) JPS5241361B2 (fi)
BR (1) BR7408260A (fi)
CA (1) CA1036758A (fi)
FI (1) FI56710C (fi)
FR (1) FR2261371B1 (fi)
GB (1) GB1489222A (fi)
IT (1) IT1022768B (fi)
NO (1) NO743539L (fi)
SE (1) SE411464B (fi)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52148201A (en) * 1976-06-01 1977-12-09 Toyo Pulp Co Ltd Process for making alkali pulp and lignin separation

Also Published As

Publication number Publication date
FI56710C (fi) 1981-07-27
BR7408260A (pt) 1976-04-27
GB1489222A (en) 1977-10-19
FI56710B (fi) 1979-11-30
NO743539L (fi) 1975-08-19
DE2450608A1 (de) 1975-08-21
JPS50112501A (fi) 1975-09-04
JPS5241361B2 (fi) 1977-10-18
FR2261371B1 (fi) 1977-10-28
AU7383574A (en) 1976-04-08
IT1022768B (it) 1978-04-20
FR2261371A1 (fi) 1975-09-12
FI301374A (fi) 1975-08-19
DE2450608B2 (de) 1976-04-15
SE411464B (sv) 1979-12-27
SE7412272L (fi) 1975-08-19

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