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NO175105C - Method of Bleaching Mass - Google Patents

Method of Bleaching Mass

Info

Publication number
NO175105C
NO175105C NO893715A NO893715A NO175105C NO 175105 C NO175105 C NO 175105C NO 893715 A NO893715 A NO 893715A NO 893715 A NO893715 A NO 893715A NO 175105 C NO175105 C NO 175105C
Authority
NO
Norway
Prior art keywords
chlorine
bleaching
procedure
oxidating
pulp
Prior art date
Application number
NO893715A
Other languages
Norwegian (no)
Other versions
NO893715L (en
NO175105B (en
NO893715D0 (en
Inventor
Marja Vaheri
Kari Miikki
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=NO175105(C) "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
Publication of NO893715D0 publication Critical patent/NO893715D0/en
Publication of NO893715L publication Critical patent/NO893715L/en
Publication of NO175105B publication Critical patent/NO175105B/en
Publication of NO175105C publication Critical patent/NO175105C/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
    • D21C9/1057—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)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Chemical & Material Sciences (AREA)
  • Biochemistry (AREA)
  • Microbiology (AREA)
  • Paper (AREA)
  • Noodles (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
  • Cereal-Derived Products (AREA)
  • Table Devices Or Equipment (AREA)
  • Investigating Or Analysing Biological Materials (AREA)
  • Hard Magnetic Materials (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)

Abstract

The invention concerns a procedure for the bleaching of pulp, in which procedure an oxidating bleaching chemical containing chlorine is used. The essential feature of the invention is that the pulp is treated, either in conjunction with or before oxidation, with a lignin-modifying oxidation-reduction enzyme, such as the lactase produced by the white-rot fungus. The oxidating bleaching chemical used in the procedure may be chlorine dioxide or a mixture of chlorine dioxide and chlorine gas. The use of said enzyme reduces the amount of chlorophenols and other forms of organically bound chlorine in the spent bleach liquor, simultaneously lowering its chemical oxygen demand.
NO893715A 1989-07-10 1989-09-18 Method of Bleaching Mass NO175105C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI893338A FI88316C (en) 1989-07-10 1989-07-10 Process for bleaching cellulose pulp

Publications (4)

Publication Number Publication Date
NO893715D0 NO893715D0 (en) 1989-09-18
NO893715L NO893715L (en) 1991-01-11
NO175105B NO175105B (en) 1994-05-24
NO175105C true NO175105C (en) 1994-08-31

Family

ID=8528744

Family Applications (1)

Application Number Title Priority Date Filing Date
NO893715A NO175105C (en) 1989-07-10 1989-09-18 Method of Bleaching Mass

Country Status (8)

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

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI108800B (en) * 1991-05-07 2002-03-28 Iogen Corp A method and apparatus for using an enzyme in the manufacture and bleaching of pulp
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 (en) 2000-05-23 2004-06-30 Valtion Teknillinen A new coating enzyme
ES2221529B1 (en) * 2002-07-10 2005-11-01 Instituto Nacional De Investigacion Y Tecnologia Agraria Y Alimentaria (Inia) PROCEDURE FOR THE DESLIGNIFICATION OF CELLULOSE PASTA.
CN109537343A (en) * 2018-11-29 2019-03-29 崔雪柯 A kind of paper pulp gas-water separation technique

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3636208A1 (en) * 1986-10-24 1988-05-05 Call Hans Peter METHOD FOR DELIGNIFYING AND WHICH BLEACHING LIGNICELLULOSE-CONTAINING OR LIGNINAL MATERIAL OR LIGNIN BY ENZYMATIC TREATMENT

Also Published As

Publication number Publication date
EP0408803A1 (en) 1991-01-23
DE68912322D1 (en) 1994-02-24
EP0408803B1 (en) 1994-01-12
FI893338L (en) 1991-01-11
NO893715L (en) 1991-01-11
ATE100157T1 (en) 1994-01-15
FI88316B (en) 1993-01-15
CA1335184C (en) 1995-04-11
NO175105B (en) 1994-05-24
FI893338A0 (en) 1989-07-10
JPH03130485A (en) 1991-06-04
FI88316C (en) 1993-04-26
JP2831048B2 (en) 1998-12-02
ES2061857T3 (en) 1994-12-16
NO893715D0 (en) 1989-09-18

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ATE48290T1 (en) PROCESSES FOR DELIGNIFICATION AND BLEACHING OF PULP.
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Legal Events

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