ATA206984A - Verfahren und reaktor zur delignifizierung von zellstoff mit sauerstoff - Google Patents

Verfahren und reaktor zur delignifizierung von zellstoff mit sauerstoff

Info

Publication number
ATA206984A
ATA206984A AT0206984A AT206984A ATA206984A AT A206984 A ATA206984 A AT A206984A AT 0206984 A AT0206984 A AT 0206984A AT 206984 A AT206984 A AT 206984A AT A206984 A ATA206984 A AT A206984A
Authority
AT
Austria
Prior art keywords
delignifying
reactor
cellular
oxygen
delignifying cellular
Prior art date
Application number
AT0206984A
Other languages
English (en)
Other versions
AT380496B (de
Inventor
Heinz Dipl Ing Loquenz
Norbert Dipl Ing Dr Meindl
Siegfried Ing Meissl
Karl Dr Schwarzl
Helmut Schweiger
Original Assignee
Waagner Biro Ag
Steyrermuehl 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 Waagner Biro Ag, Steyrermuehl Papier filed Critical Waagner Biro Ag
Priority to AT0206984A priority Critical patent/AT380496B/de
Priority to FI852324A priority patent/FI80484C/fi
Priority to SE8503153A priority patent/SE467977B/sv
Priority to CA000485566A priority patent/CA1249404A/en
Publication of ATA206984A publication Critical patent/ATA206984A/de
Application granted granted Critical
Publication of AT380496B publication Critical patent/AT380496B/de
Priority to US07/076,383 priority patent/US4834837A/en

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
    • D21C9/147—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B1/00—Cleaning by methods involving the use of tools
    • B08B1/10—Cleaning by methods involving the use of tools characterised by the type of cleaning tool
    • B08B1/14—Wipes; Absorbent members, e.g. swabs or sponges
    • B08B1/143—Wipes

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
AT0206984A 1984-06-27 1984-06-27 Verfahren und reaktor zur delignifizierung von zellstoff mit sauerstoff AT380496B (de)

Priority Applications (5)

Application Number Priority Date Filing Date Title
AT0206984A AT380496B (de) 1984-06-27 1984-06-27 Verfahren und reaktor zur delignifizierung von zellstoff mit sauerstoff
FI852324A FI80484C (fi) 1984-06-27 1985-06-11 Foerfarande och reaktor foer delignifiering av cellulosa med syre.
SE8503153A SE467977B (sv) 1984-06-27 1985-06-25 Foerfarande och reaktor foer delignifiering av massa med syre vid laag- och medelkoncentration
CA000485566A CA1249404A (en) 1984-06-27 1985-06-27 Method and device for delignification of cellulose with oxygen
US07/076,383 US4834837A (en) 1984-06-27 1987-07-22 Method for delignification of cellulose with oxygen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT0206984A AT380496B (de) 1984-06-27 1984-06-27 Verfahren und reaktor zur delignifizierung von zellstoff mit sauerstoff

Publications (2)

Publication Number Publication Date
ATA206984A true ATA206984A (de) 1985-10-15
AT380496B AT380496B (de) 1986-05-26

Family

ID=3527111

Family Applications (1)

Application Number Title Priority Date Filing Date
AT0206984A AT380496B (de) 1984-06-27 1984-06-27 Verfahren und reaktor zur delignifizierung von zellstoff mit sauerstoff

Country Status (5)

Country Link
US (1) US4834837A (de)
AT (1) AT380496B (de)
CA (1) CA1249404A (de)
FI (1) FI80484C (de)
SE (1) SE467977B (de)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5217575A (en) * 1988-10-18 1993-06-08 Kamyr Ab Process for oxygen bleaching using two vertical reactors
US5525195A (en) * 1989-02-15 1996-06-11 Union Camp Patent Holding, Inc. Process for high consistency delignification using a low consistency alkali pretreatment
US5217574A (en) * 1989-02-15 1993-06-08 Union Camp Patent Holdings Inc. Process for oxygen delignifying high consistency pulp by removing and recycling pressate from alkaline pulp
US5085734A (en) * 1989-02-15 1992-02-04 Union Camp Patent Holding, Inc. Methods of high consistency oxygen delignification using a low consistency alkali pretreatment
US5409570A (en) * 1989-02-15 1995-04-25 Union Camp Patent Holding, Inc. Process for ozone bleaching of oxygen delignified pulp while conveying the pulp through a reaction zone
US5173153A (en) * 1991-01-03 1992-12-22 Union Camp Patent Holding, Inc. Process for enhanced oxygen delignification using high consistency and a split alkali addition
US5188708A (en) * 1989-02-15 1993-02-23 Union Camp Patent Holding, Inc. Process for high consistency oxygen delignification followed by ozone relignification
AT395180B (de) * 1989-08-16 1992-10-12 Andritz Ag Maschf Verfahren zur zerkleinerung von materialien und anlage zu dessen durchfuehrung
AT404740B (de) * 1989-10-30 1999-02-25 Chemiefaser Lenzing Ag Verfahren zum chlorfreien bleichen von zellstoffen
AU636173B2 (en) * 1989-10-30 1993-04-22 Lenzing Aktiengesellschaft Method for the chlorine-free bleaching of pulps
AT393701B (de) * 1989-12-22 1991-12-10 Schmidding Wilh Gmbh & Co Verfahren zum bleichen von cellulosehaeltigen materialien sowie anlage zur durchfuehrung des verfahrens
US5164044A (en) * 1990-05-17 1992-11-17 Union Camp Patent Holding, Inc. Environmentally improved process for bleaching lignocellulosic materials with ozone
US5164043A (en) * 1990-05-17 1992-11-17 Union Camp Patent Holding, Inc. Environmentally improved process for bleaching lignocellulosic materials with ozone
US5328564A (en) * 1990-09-17 1994-07-12 Kamyr, Inc. Modified digestion of paper pulp followed by ozone bleaching
US6398908B1 (en) 1991-04-30 2002-06-04 Eka Nobel Ab Process for acid bleaching of lignocellulose-containing pulp with a magnesium compound
ZA924351B (en) * 1991-06-27 1993-03-31 Ahlstroem Oy Ozone bleaching process
SE500335C2 (sv) * 1992-10-26 1994-06-06 Sca Wifsta Oestrand Ab Blekning av sulfatmassa med peroxid-ozon-peroxid
SE512137C2 (sv) * 1992-10-29 2000-01-31 Eka Chemicals Ab Förfarande för blekning av lignocellulosahaltig massa
US5554259A (en) * 1993-10-01 1996-09-10 Union Camp Patent Holdings, Inc. Reduction of salt scale precipitation by control of process stream Ph and salt concentration
US6210527B1 (en) 1994-03-14 2001-04-03 The Boc Group, Inc. Pulp bleaching method wherein an ozone bleaching waste stream is scrubbed to form an oxygen containing stream
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
US9512560B2 (en) 2014-10-31 2016-12-06 Quantum Technologies, Inc. Short oxygen delignification method

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4196043A (en) * 1970-12-21 1980-04-01 Scott Paper Company Kraft pulp bleaching and recovery process
US4177105A (en) * 1973-05-22 1979-12-04 Kamyr, Incorporated Apparatus for delignifying and bleaching cellulose pulp
SE379069B (de) * 1973-08-27 1975-09-22 Kamyr Ab
US4372812A (en) * 1978-04-07 1983-02-08 International Paper Company Chlorine free process for bleaching lignocellulosic pulp
US4259150A (en) * 1978-12-18 1981-03-31 Kamyr Inc. Plural stage mixing and thickening oxygen bleaching process
AU539108B2 (en) * 1979-04-17 1984-09-13 Interox Societe Anonyme Delignification of unbleached chemical pulp
US4298427A (en) * 1979-06-15 1981-11-03 Weyerhaeuser Company Method and apparatus for intimately mixing oxygen and pulp while using an alkali to extract bleaching by-products

Also Published As

Publication number Publication date
SE8503153L (sv) 1985-12-28
US4834837A (en) 1989-05-30
AT380496B (de) 1986-05-26
SE8503153D0 (sv) 1985-06-25
CA1249404A (en) 1989-01-31
FI80484B (fi) 1990-02-28
SE467977B (sv) 1992-10-12
FI852324L (fi) 1985-12-28
FI852324A0 (fi) 1985-06-11
FI80484C (fi) 1990-06-11

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Legal Events

Date Code Title Description
EIH Change in the person of patent owner
ELJ Ceased due to non-payment of the annual fee
UEP Publication of translation of european patent specification