FI893338A - FOERFARANDE FOER BLEKNING AV CELLULOSAMASSA. - Google Patents

FOERFARANDE FOER BLEKNING AV CELLULOSAMASSA. Download PDF

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Publication number
FI893338A
FI893338A FI893338A FI893338A FI893338A FI 893338 A FI893338 A FI 893338A FI 893338 A FI893338 A FI 893338A FI 893338 A FI893338 A FI 893338A FI 893338 A FI893338 A FI 893338A
Authority
FI
Finland
Prior art keywords
chlorine
procedure
bleaching
oxidating
pulp
Prior art date
Application number
FI893338A
Other languages
Finnish (fi)
Other versions
FI88316C (en
FI88316B (en
FI893338A0 (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=FI893338(A) "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
Priority to FI893338A priority Critical patent/FI88316C/en
Publication of FI893338A0 publication Critical patent/FI893338A0/en
Priority to AT89117234T priority patent/ATE100157T1/en
Priority to EP89117234A priority patent/EP0408803B1/en
Priority to NO893715A priority patent/NO175105C/en
Priority to JP1241665A priority patent/JP2831048B2/en
Priority to ES89117234T priority patent/ES2061857T3/en
Priority to DE89117234T priority patent/DE68912322D1/en
Priority to CA000611772A priority patent/CA1335184C/en
Publication of FI893338A publication Critical patent/FI893338A/en
Publication of FI88316B publication Critical patent/FI88316B/en
Application granted granted Critical
Publication of FI88316C publication Critical patent/FI88316C/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)
  • Investigating Or Analysing Biological Materials (AREA)
  • Hard Magnetic Materials (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
  • Cereal-Derived Products (AREA)
  • Table Devices Or Equipment (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.
FI893338A 1989-07-10 1989-07-10 Process for bleaching cellulose pulp FI88316C (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
FI893338A FI88316C (en) 1989-07-10 1989-07-10 Process for bleaching cellulose pulp
CA000611772A CA1335184C (en) 1989-07-10 1989-09-18 Procedure for the bleaching of pulp involving the use of laccase, a lignin-modifying oxidation-reduction enzyme
NO893715A NO175105C (en) 1989-07-10 1989-09-18 Method of Bleaching Mass
EP89117234A EP0408803B1 (en) 1989-07-10 1989-09-18 Procedure for the bleaching of sulphate pulp
AT89117234T ATE100157T1 (en) 1989-07-10 1989-09-18 METHOD OF BLEACHING SULFATE PULP.
JP1241665A JP2831048B2 (en) 1989-07-10 1989-09-18 Pulp bleaching method
ES89117234T ES2061857T3 (en) 1989-07-10 1989-09-18 PROCEDURE FOR THE BLEACHING OF PAPER PASTA.
DE89117234T DE68912322D1 (en) 1989-07-10 1989-09-18 Process for bleaching sulfate pulp.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI893338A FI88316C (en) 1989-07-10 1989-07-10 Process for bleaching cellulose pulp
FI893338 1989-07-10

Publications (4)

Publication Number Publication Date
FI893338A0 FI893338A0 (en) 1989-07-10
FI893338A true FI893338A (en) 1991-01-11
FI88316B FI88316B (en) 1993-01-15
FI88316C FI88316C (en) 1993-04-26

Family

ID=8528744

Family Applications (1)

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

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
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
US6942754B2 (en) 1999-03-23 2005-09-13 Oji Paper Co., Ltd. Process for producing xylooligosaccharide from lignocellulose pulp
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
ATE100157T1 (en) 1994-01-15
NO893715L (en) 1991-01-11
EP0408803A1 (en) 1991-01-23
JP2831048B2 (en) 1998-12-02
FI88316C (en) 1993-04-26
JPH03130485A (en) 1991-06-04
DE68912322D1 (en) 1994-02-24
ES2061857T3 (en) 1994-12-16
CA1335184C (en) 1995-04-11
NO175105C (en) 1994-08-31
FI88316B (en) 1993-01-15
EP0408803B1 (en) 1994-01-12
NO893715D0 (en) 1989-09-18
FI893338A0 (en) 1989-07-10
NO175105B (en) 1994-05-24

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Legal Events

Date Code Title Description
BB Publication of examined application
FG Patent granted

Owner name: ENSO GUTZEIT OY