DE3574486D1 - Verfahren zur delignifizierung und bleiche von zellstoffen. - Google Patents

Verfahren zur delignifizierung und bleiche von zellstoffen.

Info

Publication number
DE3574486D1
DE3574486D1 DE8585108213T DE3574486T DE3574486D1 DE 3574486 D1 DE3574486 D1 DE 3574486D1 DE 8585108213 T DE8585108213 T DE 8585108213T DE 3574486 T DE3574486 T DE 3574486T DE 3574486 D1 DE3574486 D1 DE 3574486D1
Authority
DE
Germany
Prior art keywords
bleaching
delignifying
cellular
oxygen
delignification
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 - Lifetime
Application number
DE8585108213T
Other languages
English (en)
Inventor
Horst Dr Krueger
Hans-Ulrich Dr Suess
Gerhard Dr Arnold
Sigrid Anspach
Hans Jelitto
Ursula Dr Rer Na Schwartzkopff
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.)
Essity Germany GmbH
Original Assignee
Degussa GmbH
PWA Waldhof GmbH
Papierwerke Waldhof Aschaffenburg AG
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 Degussa GmbH, PWA Waldhof GmbH, Papierwerke Waldhof Aschaffenburg AG filed Critical Degussa GmbH
Priority to DE8585108213T priority Critical patent/DE3574486D1/de
Application granted granted Critical
Publication of DE3574486D1 publication Critical patent/DE3574486D1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Measuring Or Testing Involving Enzymes Or Micro-Organisms (AREA)
  • Investigating Or Analysing Biological Materials (AREA)
  • Detergent Compositions (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
DE8585108213T 1984-08-01 1985-07-03 Verfahren zur delignifizierung und bleiche von zellstoffen. Expired - Lifetime DE3574486D1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE8585108213T DE3574486D1 (de) 1984-08-01 1985-07-03 Verfahren zur delignifizierung und bleiche von zellstoffen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843428352 DE3428352A1 (de) 1984-08-01 1984-08-01 Verfahren zur delignifizierung und bleiche von zellstoffen
DE8585108213T DE3574486D1 (de) 1984-08-01 1985-07-03 Verfahren zur delignifizierung und bleiche von zellstoffen.

Publications (1)

Publication Number Publication Date
DE3574486D1 true DE3574486D1 (de) 1990-01-04

Family

ID=6242107

Family Applications (2)

Application Number Title Priority Date Filing Date
DE19843428352 Withdrawn DE3428352A1 (de) 1984-08-01 1984-08-01 Verfahren zur delignifizierung und bleiche von zellstoffen
DE8585108213T Expired - Lifetime DE3574486D1 (de) 1984-08-01 1985-07-03 Verfahren zur delignifizierung und bleiche von zellstoffen.

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DE19843428352 Withdrawn DE3428352A1 (de) 1984-08-01 1984-08-01 Verfahren zur delignifizierung und bleiche von zellstoffen

Country Status (6)

Country Link
US (1) US4626319A (de)
EP (1) EP0171575B1 (de)
AT (1) ATE48290T1 (de)
DE (2) DE3428352A1 (de)
FI (1) FI852505L (de)
NO (1) NO852472L (de)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2566015B1 (fr) * 1984-06-15 1986-08-29 Centre Tech Ind Papier Procede de blanchiment de pate mecanique par le peroxyde d'hydrogene
NO852330L (no) * 1985-06-10 1986-12-11 Papirind Forskningsinst Fremgangsmaate ved peroksydbleking av celluloseholdige masser.
AT392987B (de) * 1989-06-08 1991-07-25 Waagner Biro Ag Verfahren zur einmischung von wasserstoffperoxidloesung
DE3923728A1 (de) * 1989-07-18 1991-01-24 Degussa Verfahren zur stabilisierung der viskositaet von zellstoffen
US5211809A (en) * 1991-05-21 1993-05-18 Air Products And Chemicals, Inc,. Dye removal in oxygen color stripping of secondary fibers
US6231718B1 (en) 1992-02-28 2001-05-15 International Paper Company Two phase ozone and oxygen pulp treatment
US5364465A (en) * 1992-12-07 1994-11-15 Archer Daniels Midland Company Method of producing protein products for bright paper coating applications
US5387317A (en) * 1993-01-28 1995-02-07 The Mead Corporation Oxygen/ozone/peracetic aicd delignification and bleaching of cellulosic pulps
FI944348A (fi) * 1994-09-19 1996-03-20 Ahlstroem Oy Menetelmä kraft-massan valkaisemiseksi
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.
DE19751173A1 (de) * 1997-11-19 1999-05-27 Voith Sulzer Papiertech Patent Verfahren zur Erhöhung des Weißgrades von Papierfaserstoff
US6881299B2 (en) * 2001-05-16 2005-04-19 North American Paper Corporation Refiner bleaching with magnesium oxide and hydrogen peroxide
US20050087315A1 (en) * 2003-10-28 2005-04-28 Donovan Joseph R. Low consistency oxygen delignification process
US7297225B2 (en) * 2004-06-22 2007-11-20 Georgia-Pacific Consumer Products Lp Process for high temperature peroxide bleaching of pulp with cool discharge
US8138106B2 (en) 2005-09-30 2012-03-20 Rayonier Trs Holdings Inc. Cellulosic fibers with odor control characteristics
US10151064B2 (en) * 2013-02-08 2018-12-11 Gp Cellulose Gmbh Softwood kraft fiber having an improved α-cellulose content and its use in the production of chemical cellulose products
US9469548B2 (en) 2015-02-20 2016-10-18 Hydro Dynamics, Inc. Continuous hydrodynamic cavitation crystallization
US10220365B2 (en) 2015-03-31 2019-03-05 Hydro Dynamics, Inc. Method and apparatus for hydrogenating substances using controlled mechanically induced cavitation
US10011804B2 (en) 2015-08-21 2018-07-03 Ecoxtraction, Llc Method of extracting CBD, THC, and other compounds from cannabis using controlled cavitation
CA3074194A1 (en) 2020-02-28 2021-08-28 Fluid Energy Group Ltd. Modified sulfuric acid and uses thereof
CA3074199A1 (en) * 2020-02-28 2021-08-28 Fluid Energy Group Ltd. Modified sulfuric acid and uses thereof
CA3102541A1 (en) * 2020-12-11 2022-06-11 Sixring Inc. Novel approach to biomass delignification

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI45574C (fi) * 1970-05-11 1972-07-10 Kymin Oy Kymmene Ab Menetelmä selluloosapitoisten aineiden valkaisemiseksi.
SE360128C (sv) * 1970-08-25 1983-10-31 Mo Och Domsjoe Ab Sett att bleka cellulosamassa med en syreinnehallande gas i nervaro av alkali
US3719552A (en) * 1971-06-18 1973-03-06 American Cyanamid Co Bleaching of lignocellulosic materials with oxygen in the presence of a peroxide
SE420430B (sv) * 1978-02-17 1981-10-05 Mo Och Domsjoe Ab Forfarande for blekning och extraktion av lignocellulosahaltig material med peroxidhaltiga blekmedel
US4427490A (en) * 1978-04-07 1984-01-24 International Paper Company Delignification and bleaching process for lignocellulosic pulp with peroxide in the presence of metal additives
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
DE3207157C1 (de) * 1982-02-27 1983-06-09 Degussa Ag, 6000 Frankfurt Verfahren zur Herstellung von halbgebleichten Zellstoffen

Also Published As

Publication number Publication date
EP0171575B1 (de) 1989-11-29
FI852505L (fi) 1986-02-02
FI852505A0 (fi) 1985-06-25
US4626319A (en) 1986-12-02
EP0171575A1 (de) 1986-02-19
NO852472L (no) 1986-02-03
ATE48290T1 (de) 1989-12-15
DE3428352A1 (de) 1986-02-13

Similar Documents

Publication Publication Date Title
DE3574486D1 (de) Verfahren zur delignifizierung und bleiche von zellstoffen.
ATE2018T1 (de) Verfahren zur delignifizierung und zum bleichen von chemischen und halbchemischen zellstoffen.
DE69005308D1 (de) Verfahren zur herstellung von lignocellulosepulpe.
DE3561165D1 (en) Process for bleaching mechanical pulp with hydrogen peroxide
ATE134231T1 (de) Verbesserung beim bleichen von pulpe
SE9400277L (sv) oxygen/ozon/perättiksyra-delignifiering och -blekning av cellulosamassor
ATE54475T1 (de) Verfahren zur bleiche und delignifizierung von zellstoffhaltigen produkten.
NO176810C (no) Fremgangsmåte ved delignifisering av lignocellulosefibre
ATE110129T1 (de) Verfahren zum bleichen von chemischen zellstoffen.
DE69009750D1 (de) Bleichverfahren zur herstellung von hochweissem zellstoff.
NO843255L (no) Fremgangsmaate for peroksydbleking av celluloseholdig materiale
ATE226658T1 (de) Bleichen von papierzellstoff
SE9702583L (sv) Förfarande för massaframställning
ATE151824T1 (de) Aufschlussverfahren
ATE33998T1 (de) Verfahren zur delignifizierung von sulfatzellstoffen.
DE3674866D1 (de) Verfahren zur delignifizierung von zellulosematerialien.
SE8008336L (sv) Forfarande for delignifiering/blekning av cellulosamassa
DE3674859D1 (de) Verfahren zur delignifizierung von zellulosematerialien.
FI905380A (fi) Foerfarande foer behandling av alkaliloesning.
SE9002001L (sv) Metod foer tillfoersel av vaeteperoxid i cellulosasuspensioner

Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8327 Change in the person/name/address of the patent owner

Owner name: DEGUSSA AG, 60311 FRANKFURT, DE SCA HYGIENE PRODUC

8327 Change in the person/name/address of the patent owner

Owner name: SCA HYGIENE PRODUCTS GMBH, 68305 MANNHEIM, DE DEGU

8327 Change in the person/name/address of the patent owner

Owner name: SCA HYGIENE PRODUCTS GMBH, 68305 MANNHEIM, DE DEGU

8339 Ceased/non-payment of the annual fee