FI68681C - Foerfarande foer fullblekning av cellulosa - Google Patents

Foerfarande foer fullblekning av cellulosa Download PDF

Info

Publication number
FI68681C
FI68681C FI792115A FI792115A FI68681C FI 68681 C FI68681 C FI 68681C FI 792115 A FI792115 A FI 792115A FI 792115 A FI792115 A FI 792115A FI 68681 C FI68681 C FI 68681C
Authority
FI
Finland
Prior art keywords
cellulose
stage
bleaching
minutes
weight
Prior art date
Application number
FI792115A
Other languages
English (en)
Finnish (fi)
Swedish (sv)
Other versions
FI792115A (fi
FI68681B (fi
Inventor
Horst Krueger
Wilhelm Berndt
Hans Ulrich Suess
Original Assignee
Degussa
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 Degussa filed Critical Degussa
Publication of FI792115A publication Critical patent/FI792115A/fi
Application granted granted Critical
Publication of FI68681B publication Critical patent/FI68681B/fi
Publication of FI68681C publication Critical patent/FI68681C/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
    • 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)
  • Detergent Compositions (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
FI792115A 1978-09-21 1979-07-04 Foerfarande foer fullblekning av cellulosa FI68681C (fi)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2841013A DE2841013C2 (de) 1978-09-21 1978-09-21 Verfahren zur Vollbleiche von Zellstoff
DE2841013 1978-09-21

Publications (3)

Publication Number Publication Date
FI792115A FI792115A (fi) 1980-03-22
FI68681B FI68681B (fi) 1985-06-28
FI68681C true FI68681C (fi) 1985-10-10

Family

ID=6049994

Family Applications (1)

Application Number Title Priority Date Filing Date
FI792115A FI68681C (fi) 1978-09-21 1979-07-04 Foerfarande foer fullblekning av cellulosa

Country Status (11)

Country Link
AT (1) AT372426B (no)
BE (1) BE878841A (no)
BR (1) BR7905860A (no)
CA (1) CA1122358A (no)
CH (1) CH641515A5 (no)
DE (1) DE2841013C2 (no)
FI (1) FI68681C (no)
FR (1) FR2436846A1 (no)
IT (1) IT1119314B (no)
NO (1) NO153342C (no)
SE (1) SE445366B (no)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3937932A1 (de) * 1989-11-15 1991-05-16 Holtzmann & Cie Ag E Verfahren zum delignifizieren und bleichen von ungebleichten zellstoffsuspensionen mit alkalichlorit
SE466060C (sv) 1990-02-13 1995-07-11 Moelnlycke Ab Absorberande kemitermomekanisk massa och framställning därav
US5607546A (en) * 1990-02-13 1997-03-04 Molnlycke Ab CTMP-process
AU642971B2 (en) * 1990-02-19 1993-11-04 Paper Australia Pty Ltd Bleaching of paper pulp
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
US6398908B1 (en) 1991-04-30 2002-06-04 Eka Nobel Ab Process for acid bleaching of lignocellulose-containing pulp with a magnesium compound
SE500353C2 (sv) * 1992-10-26 1994-06-06 Sca Wifsta Oestrand Ab Peroxidblekning av sulfatmassa med tillsats av magnesium före blekningen
SE9203366L (sv) * 1992-11-11 1994-05-12 Mo Och Domsjoe Ab Förfarande vid delignifiering och/eller blekning av cellulosamassa
SE501325E (sv) * 1993-01-29 1999-06-09 Kvaerner Pulping Tech Förfarande för klorfri blekning av massa, varvid massan surgöres med ättiksyra vid behandlingen med komplexbildare
SE502706E (sv) * 1994-04-05 1999-06-18 Mo Och Domsjoe Ab Framställnng av blekt cellulosamassa genom blekning med klordioxid och behandling av komplexbildare i samma steg

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE582239C (de) * 1929-03-16 1933-09-14 I G Farbenindustrie Akt Ges Verfahren zum Bleichen von Bastfasern, insbesondere von Leinen und Hanf, in Form von Garnen und Geweben wie auch in Form von Rohfasern unter Verwendung von Superoxyd- und Hypochloritbaedern
FR1010501A (fr) * 1948-08-31 1952-06-12 Papiers Abadie Sa Des Procédé de blanchîment des pâtes cellulosiques
SE335053B (no) * 1969-05-13 1971-05-10 Mo Och Domsjoe Ab
DE2219504C2 (de) * 1972-04-21 1974-10-03 Deutsche Gold- Und Silber-Scheideanstalt Vormals Roessler, 6000 Frankfurt Mehrstufenbleiche von Zellstoffen mit erheblich reduziertem Chloreinsatz
DE2327900C3 (de) * 1973-06-01 1985-02-07 Degussa Ag, 6000 Frankfurt Bleichaufschluß von Zellstoff mit erheblich reduziertem Chloreinsatz
DE2721402C2 (de) * 1977-05-12 1984-04-12 Degussa Ag, 6000 Frankfurt Verfahren zum Bleichen von Zellstoff

Also Published As

Publication number Publication date
IT1119314B (it) 1986-03-10
NO153342C (no) 1986-02-26
SE7907850L (sv) 1980-03-22
BE878841A (fr) 1980-03-17
CH641515A5 (en) 1984-02-29
NO792067L (no) 1980-03-24
DE2841013A1 (de) 1980-04-03
FI792115A (fi) 1980-03-22
FR2436846A1 (fr) 1980-04-18
AT372426B (de) 1983-10-10
NO153342B (no) 1985-11-18
DE2841013C2 (de) 1984-06-07
ATA620579A (de) 1983-02-15
FR2436846B1 (no) 1982-08-27
FI68681B (fi) 1985-06-28
CA1122358A (en) 1982-04-27
BR7905860A (pt) 1980-05-20
IT7968380A0 (it) 1979-06-29
SE445366B (sv) 1986-06-16

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Legal Events

Date Code Title Description
MM Patent lapsed

Owner name: DEGUSSA AKTIENGESELLSCHAFT