DE68912322D1 - Verfahren zum Bleichen von Sulfatzellstoff. - Google Patents

Verfahren zum Bleichen von Sulfatzellstoff.

Info

Publication number
DE68912322D1
DE68912322D1 DE89117234T DE68912322T DE68912322D1 DE 68912322 D1 DE68912322 D1 DE 68912322D1 DE 89117234 T DE89117234 T DE 89117234T DE 68912322 T DE68912322 T DE 68912322T DE 68912322 D1 DE68912322 D1 DE 68912322D1
Authority
DE
Germany
Prior art keywords
chlorine
bleaching
procedure
pulp
oxidating
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
DE89117234T
Other languages
German (de)
English (en)
Inventor
Marja Vaheri
Kari Miikki
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.)
Stora Enso Oyj
Original Assignee
Enso Gutzeit Oy
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=8528744&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE68912322(D1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Enso Gutzeit Oy filed Critical Enso Gutzeit Oy
Application granted granted Critical
Publication of DE68912322D1 publication Critical patent/DE68912322D1/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
    • D21C9/1057—Multistage, with compounds cited in more than one sub-group D21C9/10, D21C9/12, D21C9/16
    • 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
    • D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
    • D21C5/005—Treatment of cellulose-containing material with microorganisms or enzymes

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Biochemistry (AREA)
  • Microbiology (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Noodles (AREA)
  • Cereal-Derived Products (AREA)
  • Table Devices Or Equipment (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
  • Investigating Or Analysing Biological Materials (AREA)
  • Hard Magnetic Materials (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
DE89117234T 1989-07-10 1989-09-18 Verfahren zum Bleichen von Sulfatzellstoff. Expired - Lifetime DE68912322D1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI893338A FI88316C (fi) 1989-07-10 1989-07-10 Foerfarande foer blekning av cellulosamassa

Publications (1)

Publication Number Publication Date
DE68912322D1 true DE68912322D1 (de) 1994-02-24

Family

ID=8528744

Family Applications (1)

Application Number Title Priority Date Filing Date
DE89117234T Expired - Lifetime DE68912322D1 (de) 1989-07-10 1989-09-18 Verfahren zum Bleichen von Sulfatzellstoff.

Country Status (8)

Country Link
EP (1) EP0408803B1 (no)
JP (1) JP2831048B2 (no)
AT (1) ATE100157T1 (no)
CA (1) CA1335184C (no)
DE (1) DE68912322D1 (no)
ES (1) ES2061857T3 (no)
FI (1) FI88316C (no)
NO (1) NO175105C (no)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI108800B (fi) * 1991-05-07 2002-03-28 Iogen Corp Menetelmä ja laitteisto entsyymin käyttämiseksi paperimassan valmistuksessa ja valkaisussa
US5369024A (en) * 1992-03-25 1994-11-29 The United States Of America As Represented By The Secretary Of Agriculture Xylanase from streptomyces roseiscleroticus NRRL-11019 for removing color from kraft wood pulps
US5498534A (en) * 1992-03-25 1996-03-12 The United States Of America As Represented By The Secretary Of Agriculture Method of removing color from wood pulp using xylanase from streptomyces roseiscleroticus NRRL B-11019
CA2115881C (en) * 1993-02-25 2000-05-23 Michael G. Paice Non-chlorine bleaching of kraft pulp
US5480801A (en) * 1993-09-17 1996-01-02 Novo Nordisk A/S Purified PH neutral Rhizoctonia laccases and nucleic acids encoding same
US6942754B2 (en) 1999-03-23 2005-09-13 Oji Paper Co., Ltd. Process for producing xylooligosaccharide from lignocellulose pulp
US6824646B2 (en) 1999-03-23 2004-11-30 Oji Paper Co., Ltd. Process for oxygen bleaching and enzyme treating lignocellulosic pulp with liquid treatment and recovery
FI113879B (fi) 2000-05-23 2004-06-30 Valtion Teknillinen Uusi lakkaasientsyymi
ES2221529B1 (es) * 2002-07-10 2005-11-01 Instituto Nacional De Investigacion Y Tecnologia Agraria Y Alimentaria (Inia) Procedimiento para la deslignificacion de pastas de celulosa.
CN109537343A (zh) * 2018-11-29 2019-03-29 崔雪柯 一种纸浆气水分离工艺

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3636208A1 (de) * 1986-10-24 1988-05-05 Call Hans Peter Verfahren zur delignifizierung und bleichung von lignicellulosehaltigem bzw. ligninhaltigem material bzw. lignin durch enzymatische behandlung

Also Published As

Publication number Publication date
FI893338A (fi) 1991-01-11
FI88316B (fi) 1993-01-15
EP0408803A1 (en) 1991-01-23
NO893715L (no) 1991-01-11
NO175105C (no) 1994-08-31
ATE100157T1 (de) 1994-01-15
FI893338A0 (fi) 1989-07-10
JPH03130485A (ja) 1991-06-04
NO175105B (no) 1994-05-24
CA1335184C (en) 1995-04-11
NO893715D0 (no) 1989-09-18
JP2831048B2 (ja) 1998-12-02
FI88316C (fi) 1993-04-26
EP0408803B1 (en) 1994-01-12
ES2061857T3 (es) 1994-12-16

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Legal Events

Date Code Title Description
8330 Complete renunciation