FI87244C - Foerfarande foer blekning av mekaniska massor - Google Patents

Foerfarande foer blekning av mekaniska massor Download PDF

Info

Publication number
FI87244C
FI87244C FI870391A FI870391A FI87244C FI 87244 C FI87244 C FI 87244C FI 870391 A FI870391 A FI 870391A FI 870391 A FI870391 A FI 870391A FI 87244 C FI87244 C FI 87244C
Authority
FI
Finland
Prior art keywords
hydrogen peroxide
process according
weight
treatment
bleaching
Prior art date
Application number
FI870391A
Other languages
English (en)
Finnish (fi)
Swedish (sv)
Other versions
FI870391A (fi
FI87244B (fi
FI870391A0 (fi
Inventor
Dominique Lachenal
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
Application filed by Atochem filed Critical Atochem
Publication of FI870391A0 publication Critical patent/FI870391A0/fi
Publication of FI870391A publication Critical patent/FI870391A/fi
Application granted granted Critical
Publication of FI87244B publication Critical patent/FI87244B/fi
Publication of FI87244C publication Critical patent/FI87244C/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)
FI870391A 1986-01-30 1987-01-29 Foerfarande foer blekning av mekaniska massor FI87244C (fi)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8601465A FR2593527B1 (fr) 1986-01-30 1986-01-30 Procede de blanchiment des pates mecaniques.
FR8601465 1986-01-30

Publications (4)

Publication Number Publication Date
FI870391A0 FI870391A0 (fi) 1987-01-29
FI870391A FI870391A (fi) 1987-07-31
FI87244B FI87244B (fi) 1992-08-31
FI87244C true FI87244C (fi) 1992-12-10

Family

ID=9331755

Family Applications (1)

Application Number Title Priority Date Filing Date
FI870391A FI87244C (fi) 1986-01-30 1987-01-29 Foerfarande foer blekning av mekaniska massor

Country Status (4)

Country Link
JP (1) JPS62191589A (fr)
FI (1) FI87244C (fr)
FR (1) FR2593527B1 (fr)
SE (1) SE467666B (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2622221A1 (fr) * 1987-10-22 1989-04-28 Atochem Procede de blanchiment de pates
US6605181B1 (en) * 1993-10-01 2003-08-12 Kvaerner Pulping Aktiebolag Peroxide bleach sequence including an acidic bleach stage and including a wash stage
DE19516151A1 (de) * 1995-05-03 1996-11-07 Sven Siegle Verfahren zur Herstellung einer Pulpe aus zellulosehaltigem Material, die Pulpe selbst und deren Verwendung

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE420430B (sv) * 1978-02-17 1981-10-05 Mo Och Domsjoe Ab Forfarande for blekning och extraktion av lignocellulosahaltig material med peroxidhaltiga blekmedel
US4410397A (en) * 1978-04-07 1983-10-18 International Paper Company Delignification and bleaching process and solution for lignocellulosic pulp with peroxide in the presence of metal additives
FR2520397A1 (fr) * 1982-01-28 1983-07-29 Centre Tech Ind Papier Procede pour le traitement de pates papetieres chimiques
SE451606B (sv) * 1982-09-14 1987-10-19 Sca Development Ab Sett vid blekning av hogutbytesmassor medelst peroxider

Also Published As

Publication number Publication date
FR2593527B1 (fr) 1988-03-25
FI870391A (fi) 1987-07-31
JPS62191589A (ja) 1987-08-21
JPH0156195B2 (fr) 1989-11-29
SE8700313D0 (sv) 1987-01-27
SE8700313L (sv) 1987-07-31
SE467666B (sv) 1992-08-24
FI87244B (fi) 1992-08-31
FR2593527A1 (fr) 1987-07-31
FI870391A0 (fi) 1987-01-29

Similar Documents

Publication Publication Date Title
EP0512590B1 (fr) Procédé de blanchiment de matériaux contenant de la lignocellulose
EP0670928B2 (fr) Procede de delignification de pulpe contenant de la cellulose ligneuse
WO1979000637A1 (fr) Blanchiment de materiau lignocellulosique avec des agents de blanchiment contenant du peroxyde
JPH05148784A (ja) リグノセルロース含有パルプの漂白方法
RU2445413C1 (ru) Способ получения бумажной массы
FI87244C (fi) Foerfarande foer blekning av mekaniska massor
FI93749B (fi) Menetelmä mekaanisen massan valmistamiseksi
US5296100A (en) H2 O2 /alkaline bleaching of wood pulps
FI99153C (fi) Menetelmä suursaantoisten paperimassojen vetyperoksidivalkaisuun
EP0464110B1 (fr) Procede de blanchiment servant a la production de pulpes tres claires
FI83239B (fi) Behandling av kemiska barrtraedsmassor med vaeteperoxid foer blekning av dem.
US5143581A (en) Method of peroxide bleaching of pulp pretreated with a sequestering agent then with a sulphite and reducing agent
EP0191756B1 (fr) Blanchiment à étapes multiples au péroxyde, d'une pâte mécanique
RU2097463C1 (ru) Способ отбеливания лигноцеллюлозосодержащей пульпы
FI89517B (fi) Styrning av peroxidblekning av olika traemassor
FI96522B (fi) Menetelmä valkaistujen kemitermomekaanisten massojen valmistamiseksi
FI93746C (fi) Menetelmä valkaistun kemitermomekaanisen massan valmistamiseksi
FI74054B (fi) Saett vid blekning av cellulosahaltigt material.
US20030168190A1 (en) Method for controlling the delignfication and bleaching of a pulp suspension
RU2097462C1 (ru) Способ делигнификации и отбеливания лигноцеллюлозосодержащей пульпы
US1872743A (en) Bleaching process
FI85726C (fi) Foerfarande foer delignifiering av cellulosamaterial.
SU1234484A1 (ru) Способ получени древесной массы
CA1147910A (fr) Pretraitement continu de la lignocellulose a l'anthraquinone avant la reduction en pate
CZ283763B6 (cs) Způsob zlepšení selektivity štěpení ligninu chemické papírové kaše

Legal Events

Date Code Title Description
MM Patent lapsed

Owner name: ATOCHEM