SE373396B - Forfarande vid blekning och delignifiering av cellulosahaltigt material i alkalisk losning med anvendning av syre eller fritt syre innehallande gas och sedan peroxid som ett andra blekningssteg - Google Patents

Forfarande vid blekning och delignifiering av cellulosahaltigt material i alkalisk losning med anvendning av syre eller fritt syre innehallande gas och sedan peroxid som ett andra blekningssteg

Info

Publication number
SE373396B
SE373396B SE7106108A SE610871A SE373396B SE 373396 B SE373396 B SE 373396B SE 7106108 A SE7106108 A SE 7106108A SE 610871 A SE610871 A SE 610871A SE 373396 B SE373396 B SE 373396B
Authority
SE
Sweden
Prior art keywords
bleaching
delignification
peroxide
oxygen
procedure
Prior art date
Application number
SE7106108A
Other languages
English (en)
Swedish (sv)
Inventor
P Koivisto
I Lassenius
P Paasonen
Original Assignee
Kymin Oy 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 Oy Kymmene Ab filed Critical Kymin Oy Kymmene Ab
Publication of SE373396B publication Critical patent/SE373396B/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)
SE7106108A 1970-05-11 1971-05-11 Forfarande vid blekning och delignifiering av cellulosahaltigt material i alkalisk losning med anvendning av syre eller fritt syre innehallande gas och sedan peroxid som ett andra blekningssteg SE373396B (sv)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI701311A FI45574C (fi) 1970-05-11 1970-05-11 Menetelmä selluloosapitoisten aineiden valkaisemiseksi.

Publications (1)

Publication Number Publication Date
SE373396B true SE373396B (sv) 1975-02-03

Family

ID=8505417

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7106108A SE373396B (sv) 1970-05-11 1971-05-11 Forfarande vid blekning och delignifiering av cellulosahaltigt material i alkalisk losning med anvendning av syre eller fritt syre innehallande gas och sedan peroxid som ett andra blekningssteg

Country Status (7)

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

Families Citing this family (18)

* 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
DE69004492T3 (de) * 1989-06-06 2001-11-15 Eka Nobel Ab, Bohus Verfahren zum Bleichen von Lignocellulose enthaltenden Zellstoffen.
SE9001481L (sv) * 1990-04-23 1991-10-24 Eka Nobel Ab Reduktion av halogenorganiska foereningar i blekeriavlopp
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
SE9301960L (sv) * 1993-06-08 1994-07-25 Kvaerner Pulping Tech Blekning av kemisk massa med peroxid vid övertryck
EP0797702A1 (en) * 1994-07-11 1997-10-01 Beloit Technologies, Inc. High efficiency vessels for bleaching lignocellulosic, cellulosic and synthetic polymeric fibrous materials
CN1203643A (zh) * 1995-12-07 1998-12-30 贝洛特工艺技术公司 中等稠度纸浆的氧化去木质作用
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
DE2040763C3 (de) 1975-10-02
ZA712989B (en) 1972-01-26
BR7102828D0 (pt) 1973-05-03
CA946107A (en) 1974-04-30
FI45574B (enExample) 1972-04-04
NO127205B (enExample) 1973-05-21
DE2040763B2 (enExample) 1975-02-20
DE2040763A1 (de) 1971-11-18
FI45574C (fi) 1972-07-10

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