FI872391A0 - Menetelmä ja laitteisto massan valkaisemiseksi - Google Patents

Menetelmä ja laitteisto massan valkaisemiseksi

Info

Publication number
FI872391A0
FI872391A0 FI872391A FI872391A FI872391A0 FI 872391 A0 FI872391 A0 FI 872391A0 FI 872391 A FI872391 A FI 872391A FI 872391 A FI872391 A FI 872391A FI 872391 A0 FI872391 A0 FI 872391A0
Authority
FI
Finland
Prior art keywords
bleaching
pulp
Prior art date
Application number
FI872391A
Other languages
English (en)
Swedish (sv)
Other versions
FI872391A (fi
FI91289B (fi
FI91289C (fi
Inventor
Richard Berry
Bruce I Fleming
Original Assignee
Pulp Paper Res Inst
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 Pulp Paper Res Inst filed Critical Pulp Paper Res Inst
Publication of FI872391A0 publication Critical patent/FI872391A0/fi
Publication of FI872391A publication Critical patent/FI872391A/fi
Priority to SE8801985A priority Critical patent/SE8801985L/xx
Publication of FI91289B publication Critical patent/FI91289B/fi
Application granted granted Critical
Publication of FI91289C publication Critical patent/FI91289C/fi

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

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
FI872391A 1986-05-30 1987-05-28 Menetelmä ja laitteisto massan valkaisemiseksi FI91289C (fi)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SE8801985A SE8801985L (sv) 1987-05-28 1988-05-27 Foerfarande foer reglering av en ventilationsledning samt anordning foer genomfoerande av foerfarandet

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CA510446 1986-05-30
CA000510446A CA1294396C (en) 1986-05-30 1986-05-30 Process for decreasing the charge of chemical required in a bleaching extraction stage

Publications (4)

Publication Number Publication Date
FI872391A0 true FI872391A0 (fi) 1987-05-28
FI872391A FI872391A (fi) 1987-12-01
FI91289B FI91289B (fi) 1994-02-28
FI91289C FI91289C (fi) 1994-06-10

Family

ID=4133252

Family Applications (1)

Application Number Title Priority Date Filing Date
FI872391A FI91289C (fi) 1986-05-30 1987-05-28 Menetelmä ja laitteisto massan valkaisemiseksi

Country Status (4)

Country Link
JP (1) JPS6328993A (fi)
CA (1) CA1294396C (fi)
FI (1) FI91289C (fi)
SE (1) SE500585C2 (fi)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE445051B (sv) * 1980-04-10 1986-05-26 Sca Development Ab Sett vid tillverkning av mekanisk, i huvudsak hartsfri cellulosamassa

Also Published As

Publication number Publication date
SE8702141L (sv) 1987-12-01
FI872391A (fi) 1987-12-01
JPH0415313B2 (fi) 1992-03-17
SE8702141D0 (sv) 1987-05-22
FI91289B (fi) 1994-02-28
JPS6328993A (ja) 1988-02-06
SE500585C2 (sv) 1994-07-18
FI91289C (fi) 1994-06-10
CA1294396C (en) 1992-01-21

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Legal Events

Date Code Title Description
BB Publication of examined application
FG Patent granted

Owner name: PULP AND PAPER RESEARCH INSTITUTE OF CANADA

MA Patent expired