SE8702141D0 - pulp bleaching - Google Patents

pulp bleaching

Info

Publication number
SE8702141D0
SE8702141D0 SE8702141A SE8702141A SE8702141D0 SE 8702141 D0 SE8702141 D0 SE 8702141D0 SE 8702141 A SE8702141 A SE 8702141A SE 8702141 A SE8702141 A SE 8702141A SE 8702141 D0 SE8702141 D0 SE 8702141D0
Authority
SE
Sweden
Prior art keywords
pulp bleaching
pulp
bleaching
chemical
extraction
Prior art date
Application number
SE8702141A
Other languages
Swedish (sv)
Other versions
SE500585C2 (en
SE8702141L (en
Inventor
R Berry
B 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 SE8702141D0 publication Critical patent/SE8702141D0/en
Publication of SE8702141L publication Critical patent/SE8702141L/en
Publication of SE500585C2 publication Critical patent/SE500585C2/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

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)

Abstract

There is provided an improved bleaching process and apparatus for chemical pulp wherein the charge of chemical required in a bleaching extraction stage is decreased by treating the chlorinated pulp with recycled extraction effluent.
SE8702141A 1986-05-30 1987-05-22 Pulp leaching with an extra washing step and return of extraction effluent SE500585C2 (en)

Applications Claiming Priority (1)

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

Publications (3)

Publication Number Publication Date
SE8702141D0 true SE8702141D0 (en) 1987-05-22
SE8702141L SE8702141L (en) 1987-12-01
SE500585C2 SE500585C2 (en) 1994-07-18

Family

ID=4133252

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8702141A SE500585C2 (en) 1986-05-30 1987-05-22 Pulp leaching with an extra washing step and return of extraction effluent

Country Status (4)

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

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE445051B (en) * 1980-04-10 1986-05-26 Sca Development Ab SET FOR MANUFACTURING MECHANICAL, MAINLY HEART-FREE CELLULOSAMASSA

Also Published As

Publication number Publication date
FI91289B (en) 1994-02-28
SE500585C2 (en) 1994-07-18
SE8702141L (en) 1987-12-01
JPS6328993A (en) 1988-02-06
CA1294396C (en) 1992-01-21
JPH0415313B2 (en) 1992-03-17
FI872391A0 (en) 1987-05-28
FI872391A (en) 1987-12-01
FI91289C (en) 1994-06-10

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Legal Events

Date Code Title Description
NUG Patent has lapsed