FI852505L - Metod foer avlaegsnande av lignin och blekning av cellulosa. - Google Patents

Metod foer avlaegsnande av lignin och blekning av cellulosa.

Info

Publication number
FI852505L
FI852505L FI852505A FI852505A FI852505L FI 852505 L FI852505 L FI 852505L FI 852505 A FI852505 A FI 852505A FI 852505 A FI852505 A FI 852505A FI 852505 L FI852505 L FI 852505L
Authority
FI
Finland
Prior art keywords
blekning
cellulosa
lignin
exploration
oxygen
Prior art date
Application number
FI852505A
Other languages
English (en)
Other versions
FI852505A0 (fi
Inventor
Horst Krueger
Hans-Ulrich Suess
Gerhard Arnold
Sigrid Anspach
Hans Jelitto
Ursula Scwartzkopff
Original Assignee
Degussa
Waldhof Aschaffenburg Papier
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, Waldhof Aschaffenburg Papier filed Critical Degussa
Publication of FI852505A0 publication Critical patent/FI852505A0/fi
Publication of FI852505L publication Critical patent/FI852505L/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

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)
FI852505A 1984-08-01 1985-06-25 Metod foer avlaegsnande av lignin och blekning av cellulosa. FI852505L (fi)

Applications Claiming Priority (1)

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

Publications (2)

Publication Number Publication Date
FI852505A0 FI852505A0 (fi) 1985-06-25
FI852505L true FI852505L (fi) 1986-02-02

Family

ID=6242107

Family Applications (1)

Application Number Title Priority Date Filing Date
FI852505A FI852505L (fi) 1984-08-01 1985-06-25 Metod foer avlaegsnande av lignin och blekning av cellulosa.

Country Status (6)

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

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
DE3574486D1 (de) 1990-01-04
EP0171575B1 (de) 1989-11-29
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

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Legal Events

Date Code Title Description
FA Application withdrawn

Owner name: DEGUSSA AKTIENGESELLSCHAFT

Owner name: PWA WALDHOF GMBH