NO175105C - Method of Bleaching Mass - Google Patents
Method of Bleaching MassInfo
- 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
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)
- 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.
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)
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)
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 |
-
1989
- 1989-07-10 FI FI893338A patent/FI88316C/en active IP Right Grant
- 1989-09-18 JP JP1241665A patent/JP2831048B2/en not_active Expired - Lifetime
- 1989-09-18 DE DE89117234T patent/DE68912322D1/en not_active Expired - Lifetime
- 1989-09-18 CA CA000611772A patent/CA1335184C/en not_active Expired - Fee Related
- 1989-09-18 ES ES89117234T patent/ES2061857T3/en not_active Expired - Lifetime
- 1989-09-18 EP EP89117234A patent/EP0408803B1/en not_active Expired - Lifetime
- 1989-09-18 AT AT89117234T patent/ATE100157T1/en not_active IP Right Cessation
- 1989-09-18 NO NO893715A patent/NO175105C/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
FI88316C (en) | 1993-04-26 |
FI88316B (en) | 1993-01-15 |
FI893338A (en) | 1991-01-11 |
EP0408803B1 (en) | 1994-01-12 |
NO893715D0 (en) | 1989-09-18 |
EP0408803A1 (en) | 1991-01-23 |
CA1335184C (en) | 1995-04-11 |
NO175105B (en) | 1994-05-24 |
NO893715L (en) | 1991-01-11 |
JPH03130485A (en) | 1991-06-04 |
JP2831048B2 (en) | 1998-12-02 |
FI893338A0 (en) | 1989-07-10 |
DE68912322D1 (en) | 1994-02-24 |
ES2061857T3 (en) | 1994-12-16 |
ATE100157T1 (en) | 1994-01-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MK1K | Patent expired |