ZA712989B - Process for bleaching cellulose-containing materials - Google Patents

Process for bleaching cellulose-containing materials

Info

Publication number
ZA712989B
ZA712989B ZA712989A ZA712989A ZA712989B ZA 712989 B ZA712989 B ZA 712989B ZA 712989 A ZA712989 A ZA 712989A ZA 712989 A ZA712989 A ZA 712989A ZA 712989 B ZA712989 B ZA 712989B
Authority
ZA
South Africa
Prior art keywords
containing materials
bleaching cellulose
bleaching
cellulose
materials
Prior art date
Application number
ZA712989A
Other languages
English (en)
Inventor
P Paasonen
P Koivisto
I Lassenius
Original Assignee
Kymin Osakeyhti Oe Kymmene Ab
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 Kymin Osakeyhti Oe Kymmene Ab filed Critical Kymin Osakeyhti Oe Kymmene Ab
Publication of ZA712989B publication Critical patent/ZA712989B/xx

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)
ZA712989A 1970-05-11 1971-05-07 Process for bleaching cellulose-containing materials ZA712989B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI701311A FI45574C (sv) 1970-05-11 1970-05-11 Förfarande för blekning av cellulosahaltiga material.

Publications (1)

Publication Number Publication Date
ZA712989B true ZA712989B (en) 1972-01-26

Family

ID=8505417

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA712989A ZA712989B (en) 1970-05-11 1971-05-07 Process for bleaching cellulose-containing materials

Country Status (7)

Country Link
BR (1) BR7102828D0 (sv)
CA (1) CA946107A (sv)
DE (1) DE2040763C3 (sv)
FI (1) FI45574C (sv)
NO (1) NO127205B (sv)
SE (1) SE373396B (sv)
ZA (1) ZA712989B (sv)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE373395B (sv) * 1972-12-19 1975-02-03 Mo Och Domsjoe Ab Forfarande for framstellning av cellulosamassa med hog ljushet genom uppslutning av ved med syrgas under tryck i nervaro av en kokvetska forsatt med basiska neutralisationsmedel
SE420430B (sv) * 1978-02-17 1981-10-05 Mo Och Domsjoe Ab Forfarande for blekning och extraktion av lignocellulosahaltig material med peroxidhaltiga blekmedel
US4372812A (en) * 1978-04-07 1983-02-08 International Paper Company Chlorine free process for bleaching lignocellulosic pulp
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
FR2457339A1 (fr) * 1979-05-25 1980-12-19 Interox Procede pour la delignification et le blanchiment de pates cellulosiques chimiques et semi-chimiques
DE3207157C1 (de) * 1982-02-27 1983-06-09 Degussa Ag, 6000 Frankfurt Verfahren zur Herstellung von halbgebleichten Zellstoffen
FR2566015B1 (fr) * 1984-06-15 1986-08-29 Centre Tech Ind Papier Procede de blanchiment de pate mecanique par le peroxyde d'hydrogene
DE3428352A1 (de) * 1984-08-01 1986-02-13 Degussa Ag, 6000 Frankfurt Verfahren zur delignifizierung und bleiche von zellstoffen
DE3802401A1 (de) * 1988-01-28 1989-08-03 Degussa Verfahren zur herstellung von halbgebleichtem kraftzellstoff
FI89516B (fi) 1989-05-10 1993-06-30 Ahlstroem Oy Foerfarande foer blekning av cellulosamassa med otson
ES2038097T5 (es) * 1989-06-06 2001-05-01 Eka Chemicals Ab Procedimiento para blanquear pastas papeleras que contienen lignocelulosa.
SE466061B (sv) * 1990-04-23 1991-12-09 Eka Nobel Ab Blekning av kemisk massa genom behandling med foerst ett komplexbildande aemne och sedan ett peroxidinnehaallande aemne
SE9001481L (sv) * 1990-04-23 1991-10-24 Eka Nobel Ab Reduktion av halogenorganiska foereningar i blekeriavlopp
SE9301960L (sv) * 1993-06-08 1994-07-25 Kvaerner Pulping Tech Blekning av kemisk massa med peroxid vid övertryck
WO1997027358A2 (en) * 1995-12-07 1997-07-31 Beloit Technologies, Inc. Oxygen delignification of medium consistency pulp slurry
US6375797B1 (en) * 1996-06-20 2002-04-23 Andritz-Ahlstrom Oy Bleaching chemical pulp in a PkDQ-Po Sequence
BE1011129A4 (fr) * 1997-04-25 1999-05-04 Solvay Interox Procede continu de delignification et/ou de blanchiment de pate a papier chimique vierge ou recyclee.

Also Published As

Publication number Publication date
CA946107A (en) 1974-04-30
BR7102828D0 (pt) 1973-05-03
FI45574B (sv) 1972-04-04
FI45574C (sv) 1972-07-10
DE2040763B2 (sv) 1975-02-20
DE2040763A1 (de) 1971-11-18
DE2040763C3 (de) 1975-10-02
SE373396B (sv) 1975-02-03
NO127205B (sv) 1973-05-21

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