FI45572C - Menetelmä ligniinin säilyttämiseksi valkaistaessa selluloosamassaa. - Google Patents

Menetelmä ligniinin säilyttämiseksi valkaistaessa selluloosamassaa.

Info

Publication number
FI45572C
FI45572C FI693390A FI339069A FI45572C FI 45572 C FI45572 C FI 45572C FI 693390 A FI693390 A FI 693390A FI 339069 A FI339069 A FI 339069A FI 45572 C FI45572 C FI 45572C
Authority
FI
Finland
Prior art keywords
preserving
cellulose pulp
during bleaching
lignin during
lignin
Prior art date
Application number
FI693390A
Other languages
English (en)
Swedish (sv)
Other versions
FI45572B (fi
Inventor
Gierer Josef Franz
Norin Carl Torbjoern
Original Assignee
Svenska Traeforskningsinst
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 Svenska Traeforskningsinst filed Critical Svenska Traeforskningsinst
Publication of FI45572B publication Critical patent/FI45572B/fi
Application granted granted Critical
Publication of FI45572C publication Critical patent/FI45572C/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
    • D21C9/16—Bleaching ; Apparatus therefor with per compounds
    • D21C9/163—Bleaching ; Apparatus therefor with per compounds with peroxides

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
FI693390A 1968-11-22 1969-11-21 Menetelmä ligniinin säilyttämiseksi valkaistaessa selluloosamassaa. FI45572C (fi)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE15966/68A SE324285B (fi) 1968-11-22 1968-11-22

Publications (2)

Publication Number Publication Date
FI45572B FI45572B (fi) 1972-04-04
FI45572C true FI45572C (fi) 1972-07-10

Family

ID=20301509

Family Applications (1)

Application Number Title Priority Date Filing Date
FI693390A FI45572C (fi) 1968-11-22 1969-11-21 Menetelmä ligniinin säilyttämiseksi valkaistaessa selluloosamassaa.

Country Status (4)

Country Link
US (1) US3694309A (fi)
CA (1) CA933307A (fi)
FI (1) FI45572C (fi)
SE (1) SE324285B (fi)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4029543A (en) * 1971-12-14 1977-06-14 Mo Och Domsjo Mechanically freeing wood fibers in the presence of spent peroxide bleaching liquor
SE413684C (sv) * 1974-09-23 1987-05-18 Mo Och Domsjoe Ab Forfarande for framstellning av cellulosamassa i utbytesomradet 65-95 %
US4229202A (en) * 1976-12-20 1980-10-21 Great Circle Associates Wastewater treatment with ultraviolet disinfection and increased capacity
DE3207157C1 (de) * 1982-02-27 1983-06-09 Degussa Ag, 6000 Frankfurt Verfahren zur Herstellung von halbgebleichten Zellstoffen
EP0214982A1 (en) * 1984-05-15 1987-03-25 FLINCK, Karl-Evert Method of bleaching fibre pulp for the production of paper and p aperboard
US5274139A (en) * 1993-02-26 1993-12-28 University Of Florida Method for effective reaction between oxygen and organic substance utilizing regenerable hydroperioxide oxidant
US6706143B1 (en) 1996-03-19 2004-03-16 International Paper Company Minimizing chlorinated organics in pulp bleaching processes
US7052578B2 (en) * 2000-01-28 2006-05-30 Martin Marietta Magnesia Specialties, Inc. Process employing magnesium hydroxide in peroxide bleaching of mechanical pulp
US20080110584A1 (en) * 2006-11-15 2008-05-15 Caifang Yin Bleaching process with at least one extraction stage
EP4219808A1 (en) * 2016-12-06 2023-08-02 Re:NewCell AB Cellulose fibers

Also Published As

Publication number Publication date
CA933307A (en) 1973-09-11
FI45572B (fi) 1972-04-04
US3694309A (en) 1972-09-26
SE324285B (fi) 1970-05-25

Similar Documents

Publication Publication Date Title
FI50552C (fi) Menetelmä mekaanisen massan valkaisemiseksi
ZA715394B (en) A process for bleaching cellulose pulp
FI45573C (fi) Valkaistun sellun valmistusmenetelmä.
FI45572C (fi) Menetelmä ligniinin säilyttämiseksi valkaistaessa selluloosamassaa.
FI50551C (fi) Menetelmä selluloosan ligniinin poistamiseksi ja selluloosan valkaisem iseksi
CA949263A (en) Method of bleaching wood pulp
DK109015C (da) Fremgangsmåde til reduktiv blegning af træpulp med lavt celluloseindhold.
FI44325C (fi) Menetelmä selluloosamassan valkaisemiseksi
FI45571C (fi) Menetelmä ja laite etupäässä selluloosamassan valkaisemiseksi kaasuuma isella valkaisuaineella.
DK129952B (da) Fremgangsmåde til blegning af fibermateriale af naturlig cellulose.
OA00199A (fr) Procédé de blanchiment de la pâte de cellulose.
FI47206C (fi) Menetelmä selluloosapitoisten tekstiiliaineiden tekemiseksi liekinkest äviksi
FI48367C (fi) Selluloosamassan valkaisumenetelmä.
FI48859C (fi) Menetelmä lignoselluloosa-aineen, kuten puumassan valkaisemiseksi.
FI49531C (fi) Jatkuvatoiminen selluloosakeitin kahden eri massan samanaikaiseksi kei ttämiseksi.
CH438913A (de) Verfahren zum Bleichen von Cellulosebrei
NL143295B (nl) Werkwijze ter bereiding van gebleekte cellulosepulp.
FI45356C (fi) Paperimassan valkaisumenetelmä.
FI51966C (fi) Menetlemä puumassan valkaisemiseksi ja kuivaamiseksi.
CA694720A (en) Method of bleaching cellulosic pulps
CA869267A (en) Process of and apparatus for the bleaching of fibrous cellulosic pulp
CA792160A (en) Bleaching of cellulose pulp
AT266578B (de) Verfahren zum Bleichen von Holzschliff
FI50350C (fi) Monivaihemenetelmä selluloosamassan valkaisemiseksi.
CA779176A (en) Bleaching of cellulosic pulp