CA975508A - Process for bleaching cellulose - Google Patents

Process for bleaching cellulose

Info

Publication number
CA975508A
CA975508A CA169,321A CA169321A CA975508A CA 975508 A CA975508 A CA 975508A CA 169321 A CA169321 A CA 169321A CA 975508 A CA975508 A CA 975508A
Authority
CA
Canada
Prior art keywords
bleaching cellulose
bleaching
cellulose
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
CA169,321A
Other languages
English (en)
Other versions
CA169321S (en
Inventor
Werner Traser
Herbert Pfand
Gerhard Hebbel
Horst Kruger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Evonik Operations GmbH
Original Assignee
Deutsche Gold und Silber Scheideanstalt
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 Deutsche Gold und Silber Scheideanstalt filed Critical Deutsche Gold und Silber Scheideanstalt
Application granted granted Critical
Publication of CA975508A publication Critical patent/CA975508A/en
Expired legal-status Critical Current

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)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
CA169,321A 1972-04-21 1973-04-24 Process for bleaching cellulose Expired CA975508A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2219504A DE2219504C2 (de) 1972-04-21 1972-04-21 Mehrstufenbleiche von Zellstoffen mit erheblich reduziertem Chloreinsatz
FR7628347A FR2365000A1 (fr) 1972-04-21 1976-09-21 Procede de blanchiment de la cellulose a plusieurs etapes avec mise en oeuvre de chlore reduite

Publications (1)

Publication Number Publication Date
CA975508A true CA975508A (en) 1975-10-07

Family

ID=25763122

Family Applications (1)

Application Number Title Priority Date Filing Date
CA169,321A Expired CA975508A (en) 1972-04-21 1973-04-24 Process for bleaching cellulose

Country Status (9)

Country Link
US (1) US3865685A (xx)
AT (1) AT328288B (xx)
BE (1) BE845579Q (xx)
CA (1) CA975508A (xx)
CH (1) CH589752A5 (xx)
DE (1) DE2219504C2 (xx)
FI (1) FI59433C (xx)
FR (1) FR2365000A1 (xx)
SE (1) SE405131B (xx)

Families Citing this family (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2219504C2 (de) * 1972-04-21 1974-10-03 Deutsche Gold- Und Silber-Scheideanstalt Vormals Roessler, 6000 Frankfurt Mehrstufenbleiche von Zellstoffen mit erheblich reduziertem Chloreinsatz
FR2255418B1 (xx) * 1973-12-21 1976-05-07 Europeen Cellulose
LU74434A1 (xx) * 1976-02-25 1977-09-12
SE420430B (sv) * 1978-02-17 1981-10-05 Mo Och Domsjoe Ab Forfarande for blekning och extraktion av lignocellulosahaltig material med peroxidhaltiga blekmedel
DE2841013C2 (de) * 1978-09-21 1984-06-07 Degussa Ag, 6000 Frankfurt Verfahren zur Vollbleiche von Zellstoff
US4310384A (en) * 1979-01-11 1982-01-12 Weyerhaeuser Company Reducing chemical transfer between treatment stages
US4238281A (en) * 1979-04-30 1980-12-09 Canadian International Paper Company Simplified bleaching process
GB2061539B (en) * 1979-09-12 1983-08-10 Mitsubishi Paper Mills Ltd Silver halide photographic material
FR2482989A1 (fr) * 1980-05-22 1981-11-27 Interox Procede pour la regeneration de vieux papiers
DE3037718A1 (de) * 1980-10-06 1982-04-15 Ministerio de la Industria Azucarera, Vedado, La Habana Verfahren zum bleichen von begassepulpe
SE451606B (sv) * 1982-09-14 1987-10-19 Sca Development Ab Sett vid blekning av hogutbytesmassor medelst peroxider
DE69004492T3 (de) * 1989-06-06 2001-11-15 Eka Nobel Ab, Bohus Verfahren zum Bleichen von Lignocellulose enthaltenden Zellstoffen.
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 1995-09-11 Moelnlycke Ab Absorberande kemitermomekanisk massa och framställning därav
US5607546A (en) * 1990-02-13 1997-03-04 Molnlycke Ab CTMP-process
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
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
US6398908B1 (en) 1991-04-30 2002-06-04 Eka Nobel Ab Process for acid bleaching of lignocellulose-containing pulp with a magnesium compound
GB9206415D0 (en) * 1992-03-24 1992-05-06 Albright & Wilson Stabilisation of bleach liquors
SE502706E (sv) 1994-04-05 1999-09-27 Mo Och Domsjoe Ab Framställnng av blekt cellulosamassa genom blekning med klordioxid och behandling av komplexbildare i samma steg
FI98841C (fi) * 1994-06-20 1997-08-25 Kemira Chemicals Oy Menetelmä kemiallisen massan delignifioimiseksi
SE514697C2 (sv) * 1994-08-31 2001-04-02 Valmet Fibertech Ab Eliminering av metalljoner vid blekning av massa
JP3698178B2 (ja) * 1995-09-22 2005-09-21 三菱瓦斯化学株式会社 製紙用化学パルプの漂白方法
PL355108A1 (en) * 1999-10-15 2004-04-05 Cargill, Incorporated Fibers from plant seeds and use
US7747434B2 (en) * 2000-10-24 2010-06-29 Speech Conversion Technologies, Inc. Integrated speech recognition, closed captioning, and translation system and method
US20050133173A1 (en) * 2003-12-17 2005-06-23 Bimal Khandelwal Process for bleaching Kraft pulp
US20080087390A1 (en) * 2006-10-11 2008-04-17 Fort James Corporation Multi-step pulp bleaching
WO2008137517A1 (en) * 2007-05-07 2008-11-13 Hydrite Chemical Co. Systems, compositions, and/or methods for depolymerizing cellulose and/or starch
SE538064C2 (sv) * 2014-06-17 2016-02-23 Valmet Oy Metod för att producera dissolving massa från lignocellulosahaltiga material

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2492047A (en) * 1946-03-30 1949-12-20 Du Pont Bleaching wood pulp
DE2219504C2 (de) * 1972-04-21 1974-10-03 Deutsche Gold- Und Silber-Scheideanstalt Vormals Roessler, 6000 Frankfurt Mehrstufenbleiche von Zellstoffen mit erheblich reduziertem Chloreinsatz

Also Published As

Publication number Publication date
BE845579Q (fr) 1976-12-16
AT328288B (de) 1976-03-10
DE2219504C2 (de) 1974-10-03
US3865685A (en) 1975-02-11
DE2219504A1 (de) 1973-11-15
CH589752A5 (xx) 1977-07-15
FI59433B (fi) 1981-04-30
FR2365000A1 (fr) 1978-04-14
FI59433C (fi) 1981-08-10
ATA359573A (de) 1975-05-15
SE405131B (sv) 1978-11-20
DE2219504B1 (de) 1974-02-28
FR2365000B1 (xx) 1979-01-12

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