DE69108712D1 - Ozonbleichen von Zellstoff mittlerer Konsistenz. - Google Patents

Ozonbleichen von Zellstoff mittlerer Konsistenz.

Info

Publication number
DE69108712D1
DE69108712D1 DE69108712T DE69108712T DE69108712D1 DE 69108712 D1 DE69108712 D1 DE 69108712D1 DE 69108712 T DE69108712 T DE 69108712T DE 69108712 T DE69108712 T DE 69108712T DE 69108712 D1 DE69108712 D1 DE 69108712D1
Authority
DE
Germany
Prior art keywords
pulp
ozone
gas
vessel
medium consistency
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.)
Revoked
Application number
DE69108712T
Other languages
English (en)
Other versions
DE69108712T2 (de
Inventor
Joseph R Phillips
Brian F Greenwood
Erwin D Funk
Stephen J Dunn
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.)
Ahlstrom Machinery Inc
Original Assignee
Kamyr Inc
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=24784063&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE69108712(D1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Kamyr Inc filed Critical Kamyr Inc
Application granted granted Critical
Publication of DE69108712D1 publication Critical patent/DE69108712D1/de
Publication of DE69108712T2 publication Critical patent/DE69108712T2/de
Anticipated expiration legal-status Critical
Revoked 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
    • D21C9/147—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications
    • D21C9/153—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications with ozone

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Saccharide Compounds (AREA)
  • Nitrogen Condensed Heterocyclic Rings (AREA)
  • External Artificial Organs (AREA)
DE69108712T 1991-04-30 1991-11-30 Ozonbleichen von Zellstoff mittlerer Konsistenz. Revoked DE69108712T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/693,287 US5411633A (en) 1991-04-30 1991-04-30 Medium consistency pulp ozone bleaching

Publications (2)

Publication Number Publication Date
DE69108712D1 true DE69108712D1 (de) 1995-05-11
DE69108712T2 DE69108712T2 (de) 1995-08-17

Family

ID=24784063

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69108712T Revoked DE69108712T2 (de) 1991-04-30 1991-11-30 Ozonbleichen von Zellstoff mittlerer Konsistenz.

Country Status (11)

Country Link
US (1) US5411633A (de)
EP (1) EP0511433B1 (de)
JP (1) JPH05209387A (de)
AT (1) ATE120816T1 (de)
AU (1) AU644712B2 (de)
BR (1) BR9200083A (de)
CA (1) CA2057644C (de)
DE (1) DE69108712T2 (de)
FI (1) FI921716A (de)
NO (1) NO920130L (de)
ZA (1) ZA92375B (de)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI925558A (fi) * 1992-04-22 1993-10-23 Ahlstroem Oy Foerfarande och anordning foer blekning av massa
CA2078276C (en) * 1992-09-15 2004-05-25 Derek Hornsey Recovery of oxygen-rich gas from ozone bleaching processes
US5364505A (en) * 1992-12-07 1994-11-15 Kamyr, Inc. Pressurized ozone pulp delignification reactor and a compressor for supplying ozone to the reactor
US6340409B1 (en) * 1993-04-29 2002-01-22 Lewis Donald Shackford Method for multistage bleaching using gaseous reagent in the first stage with controlled gas release
AT402077B (de) * 1995-03-10 1997-01-27 Andritz Patentverwaltung Verfahren und vorrichtung zur behandlung, insbesondere bleichen, von faserstoff
US5656130A (en) * 1995-04-28 1997-08-12 Union Camp Holding, Inc. Ambient temperature pulp bleaching with peroxyacid salts
US6051109A (en) * 1995-10-27 2000-04-18 Andritz-Patentverwaltungs-Gesellschaft M.B.H. Apparatus for distributing fluffed pulp into a static bed reactor
US5851350A (en) * 1995-12-27 1998-12-22 A. Ahlstrom Corporation Method and apparatus for pumping cellulose pulp
US6174409B1 (en) 1997-09-19 2001-01-16 American Air Liquide Inc. Method to improve final bleached pulp strength properties by adjusting the CI02:03 ration within a single (D/Z) stage of the bleaching process
FI981808A (fi) * 1998-08-24 2000-02-25 Crs Reactor Engineering Uk Ltd Menetelmä massan valkaisemiseksi
SE9803474L (sv) * 1998-10-08 2000-04-09 Valmet Fibertech Ab Syrgasblekning av massa
FR2845682B1 (fr) * 2002-10-10 2004-11-19 Air Liquide Procede de reduction des boues d'un traitement biologique de l'eau mettant en oeuvre de l'ozone
US9744482B2 (en) 2013-12-27 2017-08-29 ClearCove Systems, Inc. Screen decanter for screening solids from waste water
US9855518B2 (en) 2013-12-27 2018-01-02 ClearCove Systems, Inc. Method and apparatus for a vertical lift decanter system in a water treatment system
US10190710B2 (en) 2013-12-27 2019-01-29 ClearCove Systems, Inc. Foldable drain pipe for a decanter in a water treatment system
US9782696B2 (en) * 2013-12-27 2017-10-10 ClearCove Systems, Inc. Method for maximizing uniform effluent flow through a waste water treatment system
US9643106B2 (en) 2013-12-27 2017-05-09 ClearCove Systems, Inc. Screen decanter for removing solids from wastewater
US11131061B2 (en) 2017-12-20 2021-09-28 Unicharm Corporation Method for manufacturing recycled pulp fibers

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4486286A (en) * 1982-09-28 1984-12-04 Nerken Research Corp. Method of depositing a carbon film on a substrate and products obtained thereby
FR2620744A1 (fr) * 1987-09-17 1989-03-24 Degremont Procede de traitement par l'ozone de materiaux ligno-cellulosiques, notamment de pates a papier et reacteur pour la mise en oeuvre de ce procede
FI89516B (fi) * 1989-05-10 1993-06-30 Ahlstroem Oy Foerfarande foer blekning av cellulosamassa med otson
AU636173B2 (en) * 1989-10-30 1993-04-22 Lenzing Aktiengesellschaft Method for the chlorine-free bleaching of pulps

Also Published As

Publication number Publication date
BR9200083A (pt) 1992-12-01
AU1004892A (en) 1992-11-05
DE69108712T2 (de) 1995-08-17
ZA92375B (en) 1993-04-15
NO920130L (no) 1992-11-02
EP0511433B1 (de) 1995-04-05
US5411633A (en) 1995-05-02
EP0511433A1 (de) 1992-11-04
CA2057644A1 (en) 1992-10-31
CA2057644F (en) 1992-10-31
ATE120816T1 (de) 1995-04-15
AU644712B2 (en) 1993-12-16
NO920130D0 (no) 1992-01-09
JPH05209387A (ja) 1993-08-20
CA2057644C (en) 1996-08-06
FI921716A0 (fi) 1992-04-16
FI921716A (fi) 1992-10-31

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Legal Events

Date Code Title Description
8363 Opposition against the patent
8327 Change in the person/name/address of the patent owner

Owner name: AHLSTROM MACHINERY INC., GLENS FALLS, N.Y., US

8331 Complete revocation