ATE100157T1 - METHOD OF BLEACHING SULFATE PULP. - Google Patents

METHOD OF BLEACHING SULFATE PULP.

Info

Publication number
ATE100157T1
ATE100157T1 AT89117234T AT89117234T ATE100157T1 AT E100157 T1 ATE100157 T1 AT E100157T1 AT 89117234 T AT89117234 T AT 89117234T AT 89117234 T AT89117234 T AT 89117234T AT E100157 T1 ATE100157 T1 AT E100157T1
Authority
AT
Austria
Prior art keywords
chlorine
bleaching
procedure
pulp
oxidating
Prior art date
Application number
AT89117234T
Other languages
German (de)
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=ATE100157(T1) "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 ATE100157T1 publication Critical patent/ATE100157T1/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)
  • 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)

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.
AT89117234T 1989-07-10 1989-09-18 METHOD OF BLEACHING SULFATE PULP. ATE100157T1 (en)

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
EP89117234A EP0408803B1 (en) 1989-07-10 1989-09-18 Procedure for the bleaching of sulphate pulp

Publications (1)

Publication Number Publication Date
ATE100157T1 true ATE100157T1 (en) 1994-01-15

Family

ID=8528744

Family Applications (1)

Application Number Title Priority Date Filing Date
AT89117234T ATE100157T1 (en) 1989-07-10 1989-09-18 METHOD OF BLEACHING SULFATE 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
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
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
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
JPH03130485A (en) 1991-06-04
JP2831048B2 (en) 1998-12-02
DE68912322D1 (en) 1994-02-24
FI88316C (en) 1993-04-26
FI893338L (en) 1991-01-11
NO175105B (en) 1994-05-24
FI893338A0 (en) 1989-07-10
NO893715L (en) 1991-01-11
NO893715D0 (en) 1989-09-18
EP0408803B1 (en) 1994-01-12
ES2061857T3 (en) 1994-12-16
NO175105C (en) 1994-08-31
CA1335184C (en) 1995-04-11
FI88316B (en) 1993-01-15

Similar Documents

Publication Publication Date Title
ATE103351T1 (en) METHOD OF BLEACHING PULP.
DE68907593D1 (en) METHOD FOR BLEACHING PULP.
ATE48290T1 (en) PROCESSES FOR DELIGNIFICATION AND BLEACHING OF PULP.
ATE100157T1 (en) METHOD OF BLEACHING SULFATE PULP.
ATE135429T1 (en) METHOD FOR REDUCING RESIDUAL CHLORINE IN HARDWOOD PULP
DE69113444D1 (en) METHOD FOR BLEACHING CHEMICAL PAPER FIBER.
FI99152B (en) With hydrogen peroxide enhanced oxygen delignification
SE8008337L (en) PROCEDURE FOR DELIGNIFICATION / WHITING OF CELLULOSAMASSA
DE50206517D1 (en) A method of loading fibers contained in a pulp suspension with an adjuvant
ATE35433T1 (en) METHODS OF PREPARING CHEMICAL WOOD PULP FOR BLEACHING.
BR9803865A (en) Process for bleaching carbon paper pulp
ATE57400T1 (en) PROCESSES FOR DELIGNIFICATION OF CELLULOSIC MATERIALS.

Legal Events

Date Code Title Description
UEP Publication of translation of european patent specification
REN Ceased due to non-payment of the annual fee