FI900549A0 - FOERFARANDE FOER BLEKNING AV CELLULOSAMASSA. - Google Patents
FOERFARANDE FOER BLEKNING AV CELLULOSAMASSA.Info
- Publication number
- FI900549A0 FI900549A0 FI900549A FI900549A FI900549A0 FI 900549 A0 FI900549 A0 FI 900549A0 FI 900549 A FI900549 A FI 900549A FI 900549 A FI900549 A FI 900549A FI 900549 A0 FI900549 A0 FI 900549A0
- Authority
- FI
- Finland
- Prior art keywords
- enzyme
- steps
- pulp
- chemical
- decreased
- Prior art date
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
- 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
-
- 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
- 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
- D21C9/12—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds
- D21C9/14—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites
- D21C9/142—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites with ClO2/Cl2 in a multistage process involving ClO2/Cl2 exclusively
-
- 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
-
- 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
- D21C9/16—Bleaching ; Apparatus therefor with per compounds
- D21C9/163—Bleaching ; Apparatus therefor with per compounds with peroxides
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Chemical & Material Sciences (AREA)
- Biochemistry (AREA)
- Microbiology (AREA)
- Paper (AREA)
- Investigating Or Analysing Biological Materials (AREA)
- Hard Magnetic Materials (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
The invention relates to a process for the bleaching of chemical pulp, process which comprises one or several oxidation steps and one or several alkali treatment steps and in which the pulp is treated with an enzyme. The essential idea of the invention is that the pulp is treated with an enzyme in two or more different steps of the process, an oxidation and/or alkali treatment being most preferably carried out between the enzyme treatment steps. The oxidizing chemical used is most preferably oxygen, although peroxide and/or chlorine and/or chlorine dioxide can also be used in addition to or instead of it, and in the enzyme treatment steps, which preferably number 2-4, the same enzyme or alternatively two or more different enzymes may be used. By the enzyme treatment according to the invention, the amount of toxic organic compounds inthe bleaching effluent is decreased and at the same time the chemical oxygen consumption of the effluent is decreased.
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI900549A FI89814C (en) | 1990-02-02 | 1990-02-02 | FOERFARANDE FOER BLEKNING AV CELLULOSAMASSA |
PCT/FI1991/000033 WO1991011553A1 (en) | 1990-02-02 | 1991-02-01 | A process for the bleaching of chemical pulp |
CA002075187A CA2075187A1 (en) | 1990-02-02 | 1991-02-01 | Process for the bleaching of chemical pulp |
JP3503752A JPH05509362A (en) | 1990-02-02 | 1991-02-01 | Chemical pulp bleaching method |
DE69113444T DE69113444D1 (en) | 1990-02-02 | 1991-02-01 | METHOD FOR BLEACHING CHEMICAL PAPER FIBER. |
AT91903684T ATE128498T1 (en) | 1990-02-02 | 1991-02-01 | METHOD FOR BLEACHING CHEMICAL PAPER PULP. |
ES91903684T ES2079062T5 (en) | 1990-02-02 | 1991-02-01 | PROCEDURE FOR THE BLEACHING OF CHEMICAL PAPER PASTE. |
EP91903684A EP0513140B2 (en) | 1990-02-02 | 1991-02-01 | A process for the bleaching of chemical pulp |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI900549A FI89814C (en) | 1990-02-02 | 1990-02-02 | FOERFARANDE FOER BLEKNING AV CELLULOSAMASSA |
FI900549 | 1990-02-02 |
Publications (4)
Publication Number | Publication Date |
---|---|
FI900549A0 true FI900549A0 (en) | 1990-02-02 |
FI900549A FI900549A (en) | 1991-08-03 |
FI89814B FI89814B (en) | 1993-08-13 |
FI89814C FI89814C (en) | 1993-11-25 |
Family
ID=8529828
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FI900549A FI89814C (en) | 1990-02-02 | 1990-02-02 | FOERFARANDE FOER BLEKNING AV CELLULOSAMASSA |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP0513140B2 (en) |
JP (1) | JPH05509362A (en) |
AT (1) | ATE128498T1 (en) |
CA (1) | CA2075187A1 (en) |
DE (1) | DE69113444D1 (en) |
ES (1) | ES2079062T5 (en) |
FI (1) | FI89814C (en) |
WO (1) | WO1991011553A1 (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI90670C (en) * | 1991-05-02 | 1994-03-10 | Metsae Serla Oy | Treatment of alkali-treated pulp for use in papermaking |
US7816129B2 (en) | 1994-07-29 | 2010-10-19 | Ab Enzymes Gmbh | Production and secretion of proteins of bacterial origin in filamentous fungi |
EP0905306A1 (en) | 1997-09-26 | 1999-03-31 | Consortium für elektrochemische Industrie GmbH | Multicomponent system for modifying, decomposing or bleaching lignin or lignin-containing materials and method of using this system |
WO2000014243A1 (en) | 1998-09-04 | 2000-03-16 | University Of Georgia Research Foundation, Inc. | Phenolic acid esterases, coding sequences and methods |
US6602700B1 (en) | 1998-09-04 | 2003-08-05 | University Of Georgia Research Foundation, Inc. | Phenolic acid esterases, coding sequences and methods |
US7541175B1 (en) | 2000-12-22 | 2009-06-02 | Iogen Energy Corporation | Alkaline extraction stages comprising xylanase |
US7320741B2 (en) | 2001-01-18 | 2008-01-22 | Iogen Bio-Products Corporation | Method of xylanase treatment in a chlorine dioxide bleaching sequence |
WO2003074780A1 (en) * | 2002-03-06 | 2003-09-12 | Iogen Bio-Products Corporation | Xylanase treatment of chemical pulp |
BRPI0312121B1 (en) | 2002-06-14 | 2019-10-01 | Verenium Corporation | PREPARATION OF PROTEIN, PROPERTY POLYPEPTIDE AND METHODS FOR PREPARING AND USING THEM |
BRPI0707784B1 (en) | 2006-02-14 | 2018-05-22 | Verenium Corporation | ISOLATED, SYNTHETIC OR RECOMBINANT NUCLEIC ACID, EXPRESSION CASSETTE, CLONING VECTOR OR VEHICLE, TRANSFORMED ISOLATED HOST CELL, AND METHOD FOR PRODUCTION OF A RECOMBINANT POLYPEPTIDE |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI90888B (en) * | 1989-02-14 | 1993-12-31 | Enso Gutzeit Oy | Method for bleaching cellulose pulp |
ZA904441B (en) * | 1989-06-22 | 1991-03-27 | Int Paper Co | Enzymatic delignification of lignocellulosic material |
-
1990
- 1990-02-02 FI FI900549A patent/FI89814C/en not_active IP Right Cessation
-
1991
- 1991-02-01 WO PCT/FI1991/000033 patent/WO1991011553A1/en active IP Right Grant
- 1991-02-01 JP JP3503752A patent/JPH05509362A/en active Pending
- 1991-02-01 CA CA002075187A patent/CA2075187A1/en not_active Abandoned
- 1991-02-01 EP EP91903684A patent/EP0513140B2/en not_active Expired - Lifetime
- 1991-02-01 AT AT91903684T patent/ATE128498T1/en not_active IP Right Cessation
- 1991-02-01 DE DE69113444T patent/DE69113444D1/en not_active Expired - Lifetime
- 1991-02-01 ES ES91903684T patent/ES2079062T5/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
ATE128498T1 (en) | 1995-10-15 |
FI900549A (en) | 1991-08-03 |
CA2075187A1 (en) | 1991-08-03 |
FI89814B (en) | 1993-08-13 |
JPH05509362A (en) | 1993-12-22 |
EP0513140B2 (en) | 1998-03-18 |
WO1991011553A1 (en) | 1991-08-08 |
FI89814C (en) | 1993-11-25 |
EP0513140A1 (en) | 1992-11-19 |
ES2079062T5 (en) | 1998-07-16 |
DE69113444D1 (en) | 1995-11-02 |
EP0513140B1 (en) | 1995-09-27 |
ES2079062T3 (en) | 1996-01-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FG | Patent granted |
Owner name: ENSO-GUTZEIT OY |
|
BB | Publication of examined application | ||
FG | Patent granted |
Owner name: ENSO GUTZEIT OY |
|
MA | Patent expired |