FI864411A - FOERFARANDE FOER BLEKNING AV KEMISKA PAPPERSMASSOR - Google Patents

FOERFARANDE FOER BLEKNING AV KEMISKA PAPPERSMASSOR Download PDF

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Publication number
FI864411A
FI864411A FI864411A FI864411A FI864411A FI 864411 A FI864411 A FI 864411A FI 864411 A FI864411 A FI 864411A FI 864411 A FI864411 A FI 864411A FI 864411 A FI864411 A FI 864411A
Authority
FI
Finland
Prior art keywords
pulp
alkaline extraction
pappersmassor
kemiska
treatment
Prior art date
Application number
FI864411A
Other languages
Finnish (fi)
Other versions
FI864411A0 (en
FI85294B (en
Inventor
Lucien Bourson
Original Assignee
Atochem
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
Family has litigation
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Application filed by Atochem filed Critical Atochem
Publication of FI864411A0 publication Critical patent/FI864411A0/en
Publication of FI864411A publication Critical patent/FI864411A/en
Application granted granted Critical
Publication of FI85294B publication Critical patent/FI85294B/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
    • D21C9/1026—Other features in bleaching processes

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Detergent Compositions (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)

Abstract

1. Process for bleaching chemical papermaking pulps in a bleaching sequence including, in succession, a treatment of the pulp by means of chlorine and chlorine dioxide acting in a single bath, a first alkaline extraction by means of sodium hydroxide, a treatment of the pulp by means of chlorine dioxide, a second alkaline extraction by means of sodium hydroxide and again a treatment of the pulp by means of chlorine dioxide, characterized in that the pulp is subjected at the same time to the action of oxygen during the first alkaline extraction and to the action of hydrogen peroxide during the second alkaline extraction.
FI864411A 1985-10-30 1986-10-29 FOERFARANDE FOER BLEKNING AV KEMISKA PAPPERSMASSOR. FI85294B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8516332A FR2589494B1 (en) 1985-10-30 1985-10-30 PROCESS FOR BLEACHING CHEMICAL PAPER PULP
FR8516332 1985-10-30

Publications (3)

Publication Number Publication Date
FI864411A0 FI864411A0 (en) 1986-10-29
FI864411A true FI864411A (en) 1987-05-01
FI85294B FI85294B (en) 1991-12-13

Family

ID=9324477

Family Applications (1)

Application Number Title Priority Date Filing Date
FI864411A FI85294B (en) 1985-10-30 1986-10-29 FOERFARANDE FOER BLEKNING AV KEMISKA PAPPERSMASSOR.

Country Status (11)

Country Link
EP (1) EP0222674B1 (en)
JP (1) JPS62141188A (en)
AT (1) ATE48291T1 (en)
AU (1) AU603556B2 (en)
DE (2) DE222674T1 (en)
ES (1) ES2000019B3 (en)
FI (1) FI85294B (en)
FR (1) FR2589494B1 (en)
NO (1) NO864319L (en)
PT (1) PT83649B (en)
ZA (1) ZA868275B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4031597A1 (en) * 1990-10-05 1992-04-09 Sueddeutsche Kalkstickstoff METHOD FOR LOW-CHLORINE BLEACHING AND DELIGNIFICATION OF CELLULAR
US6569284B1 (en) * 1996-09-24 2003-05-27 International Paper Company Elemental-chlorine-free bleaching process having an initial Eo or Eop stage
FR3062138B1 (en) * 2017-01-23 2019-06-07 Centre Technique De L'industrie Des Papiers, Cartons Et Celluloses PROCESS FOR WHITENING A PAPER PULP

Also Published As

Publication number Publication date
AU6449286A (en) 1987-05-07
NO864319L (en) 1987-05-04
JPS62141188A (en) 1987-06-24
PT83649A (en) 1986-11-01
DE3667184D1 (en) 1990-01-04
FR2589494B1 (en) 1988-07-29
FI864411A0 (en) 1986-10-29
JPH0116958B2 (en) 1989-03-28
EP0222674A1 (en) 1987-05-20
EP0222674B1 (en) 1989-11-29
FR2589494A1 (en) 1987-05-07
DE222674T1 (en) 1987-10-15
AU603556B2 (en) 1990-11-22
ES2000019A4 (en) 1987-09-16
FI85294B (en) 1991-12-13
NO864319D0 (en) 1986-10-29
PT83649B (en) 1989-05-31
ES2000019B3 (en) 1990-03-16
ZA868275B (en) 1987-06-24
ATE48291T1 (en) 1989-12-15

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Legal Events

Date Code Title Description
FA Application withdrawn

Owner name: ATOCHEM