FI81395B - Foerfarande foer blekning av cellulosamassa. - Google Patents
Foerfarande foer blekning av cellulosamassa. Download PDFInfo
- Publication number
- FI81395B FI81395B FI881192A FI881192A FI81395B FI 81395 B FI81395 B FI 81395B FI 881192 A FI881192 A FI 881192A FI 881192 A FI881192 A FI 881192A FI 81395 B FI81395 B FI 81395B
- Authority
- FI
- Finland
- Prior art keywords
- pulp
- enzyme
- bleaching
- bleached
- chlorine
- 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
- D21C9/12—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds
- D21C9/14—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites
-
- 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
- D21C9/1026—Other features in bleaching processes
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Investigating Or Analysing Biological Materials (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
- Hard Magnetic Materials (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
- Preparation Of Compounds By Using Micro-Organisms (AREA)
- Detergent Compositions (AREA)
Claims (9)
1. Förfarande för att bleka cellulosamassa som erhälls frän lövträd, i vilket förfarande används en klorhaltig blekningskemikalie, kännetecknat av att rest-klorhalten hos den blekta massan reduceras genom att utföra en entsymbehandling för massan.
2. Förfarande enligt krav 1, kännetecknat av att massan behandlas med entsym före blekningsbehandlingen eller därefter.
3. Förfarande enligt krav 1 eller 2, kännetecknat av att entsymbehandlingen äger rum i ett temperaturomräde 10-90° C, företrädesvis 40-70° C, och i pH 3,0-7,5, företrädesvis 4,0-6,0.
4. Förfarande enligt nägot av föregäende krav, kännetecknat av att den använda entsymen är hemicellulas, cellulas, esteras eller deras blandning.
5. Förfarande enligt krav 2-4, kännetecknat av att tili en oblekt, genom björksulfatkokning ernädd massa tilläggs entsym, som lätes att inverka, varefter massan bleks medelst successiva oxidations- och extraktionsskeden genom att använda klorgas och/eller klordioxid säsom blek-ningskemikalier i oxidationsskeden och natriumhydroxid i extraktionsskeden.
6. Förfarande enligt krav 5, kännetecknat av att blekningen bestär av en femstegsklorblekning.
7. Bruk av entsym för att reducera restklorhalten hos blekt cellulosamassa av lövträd.
8. Bruk av hemicellulas, cellulas, esteras eller deras blanding enligt krav 7 för att reducera restklorhalten hos blekt cellulosamassa av lövträd. 12 81 395
9. Bruk av entsym enligt krav 7 eller 8 för att reducera restklorhalten hos blekt cellulosamassa, som skall raffineras till livsmedelspackningskartong eller -papper. il
Priority Applications (12)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI881192A FI81395B (fi) | 1988-03-14 | 1988-03-14 | Foerfarande foer blekning av cellulosamassa. |
JP1502856A JPH03505758A (ja) | 1988-03-14 | 1989-03-13 | セルロースパルプを漂白するための方法 |
CA000593523A CA1334581C (en) | 1988-03-14 | 1989-03-13 | Procedure for bleaching cellulose pulp involving the use of combined enzyme treatment and a bleaching process employing chlorine chemicals |
BR898907314A BR8907314A (pt) | 1988-03-14 | 1989-03-13 | Processo para branquear polpa de celulose e enzima usada no mesmo |
AT89903748T ATE135429T1 (de) | 1988-03-14 | 1989-03-13 | Verfahren zur reduzierung von restchlor in laubholz-zellstoff |
AU32923/89A AU626846B2 (en) | 1988-03-14 | 1989-03-13 | Bleaching cellulose pulp from hardwood using chlorine and enzymes |
NZ228308A NZ228308A (en) | 1988-03-14 | 1989-03-13 | Alkaline bleaching of cellulose pulp |
PCT/FI1989/000045 WO1989008738A1 (en) | 1988-03-14 | 1989-03-13 | Procedure for bleaching cellulose pulp |
EP89903748A EP0407421B1 (en) | 1988-03-14 | 1989-03-13 | A method for reducing residual chlorine content in hardwood pulp |
DE68925967T DE68925967T2 (de) | 1988-03-14 | 1989-03-13 | Verfahren zur reduzierung von restchlor in laubholz-zellstoff |
DK199002119A DK175185B1 (da) | 1988-03-14 | 1990-09-04 | Fremgangsmåde til blegning af cellulosemasse og anvendelse af enzymer |
NO903913A NO174722C (no) | 1988-03-14 | 1990-09-07 | Fremgangsmåte for bleking av cellulosemasse og anvendelse av enzymer |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI881192 | 1988-03-14 | ||
FI881192A FI81395B (fi) | 1988-03-14 | 1988-03-14 | Foerfarande foer blekning av cellulosamassa. |
Publications (3)
Publication Number | Publication Date |
---|---|
FI881192A0 FI881192A0 (fi) | 1988-03-14 |
FI881192A FI881192A (fi) | 1989-09-15 |
FI81395B true FI81395B (fi) | 1990-06-29 |
Family
ID=8526077
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FI881192A FI81395B (fi) | 1988-03-14 | 1988-03-14 | Foerfarande foer blekning av cellulosamassa. |
Country Status (12)
Country | Link |
---|---|
EP (1) | EP0407421B1 (sv) |
JP (1) | JPH03505758A (sv) |
AT (1) | ATE135429T1 (sv) |
AU (1) | AU626846B2 (sv) |
BR (1) | BR8907314A (sv) |
CA (1) | CA1334581C (sv) |
DE (1) | DE68925967T2 (sv) |
DK (1) | DK175185B1 (sv) |
FI (1) | FI81395B (sv) |
NO (1) | NO174722C (sv) |
NZ (1) | NZ228308A (sv) |
WO (1) | WO1989008738A1 (sv) |
Families Citing this family (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5298405A (en) * | 1986-04-30 | 1994-03-29 | Alko Limited | Enzyme preparations with recombinantly-altered cellulose profiles and methods for their production |
FI90888B (sv) * | 1989-02-14 | 1993-12-31 | Enso Gutzeit Oy | Förfarande för blekning av cellulosamassa |
FI86896B (fi) * | 1989-05-04 | 1992-07-15 | Enso Gutzeit Oy | Foerfarande foer blekning av cellulosamassa. |
DK420289D0 (da) * | 1989-08-25 | 1989-08-25 | Novo Nordisk As | Fremgangsmaade til behandling af lignocellulosepulp |
NZ235679A (en) * | 1989-10-18 | 1993-01-27 | Int Paper Co | Bleaching lignocellulosic pulp using (a) treatment with xylanase and (b) one or more chemical bleaching stages |
SE465320B (sv) * | 1990-01-10 | 1991-08-26 | Korsnaes Ab | Preparat som uppvisar enzymatisk delignifieringsaktivitet, saett att framstaella detsamma och tillaempningar daerav |
FI88315C (sv) * | 1990-04-04 | 1993-04-26 | Enso Gutzeit Oy | Förfarande för blekning av cellulosamassa |
US5837515A (en) * | 1990-05-16 | 1998-11-17 | Alko-Yhtiot Oy | Enzyme preparations and methods for their production |
GB9018426D0 (en) * | 1990-08-22 | 1990-10-03 | Sandoz Ltd | Improvements in or relating to novel compounds |
NZ239500A (en) * | 1990-08-24 | 1993-08-26 | Novo Nordisk As | Xylanases obtained from bacillus pumilus and use in a lignocellulosic chemical pulping process |
DE4129739A1 (de) * | 1990-09-11 | 1992-03-12 | Sandoz Ag | Chlorfreies bleichen von papierpulpe |
FI108800B (sv) * | 1991-05-07 | 2002-03-28 | Iogen Corp | Förfarande och anordning för användning av enzymer vid framställning och blekning av pappersmassa |
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 |
US5935836A (en) * | 1994-07-29 | 1999-08-10 | Rohm Enzyme Finland Oy | Actinomadura xylanase sequences and methods of use |
US5871730A (en) * | 1994-07-29 | 1999-02-16 | Universite De Sherbrooke | Thermostable xylanase DNA, protein and methods of use |
US7816129B2 (en) | 1994-07-29 | 2010-10-19 | Ab Enzymes Gmbh | Production and secretion of proteins of bacterial origin in filamentous fungi |
US6300114B1 (en) | 1994-07-29 | 2001-10-09 | Rohm Enzyme Finland Oy | Sequences of xylanase and xylanase expression vectors |
AU2002229430A1 (en) | 2001-01-18 | 2002-07-30 | Iogen Bio-Products Corporation | Use of xylanase in pulp bleaching |
US7368036B2 (en) | 2002-03-06 | 2008-05-06 | Iogen Bio-Products Corporation | Xylanase treatment of chemical pulp |
CN104963206A (zh) * | 2014-12-11 | 2015-10-07 | 华东理工常熟研究院有限公司 | 酶改性纸浆纤维、木塑复合材料及其制备方法 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NZ216726A (en) * | 1985-07-15 | 1990-08-28 | Repligen Corp | Use of lignin-degrading enzymes from phanerochaete chrysosporium for treatment of wood pulp and e1 effluent |
ZA894239B (en) * | 1988-06-08 | 1990-03-28 | Int Paper Co | Enzymatic delignification of lignocellulosic material |
DE68914112T2 (de) * | 1988-11-23 | 1994-08-04 | Sandoz Ag | Benutzung von Enzymen von Aureobasidium Pullulans für das Bleichen von Zellstoff. |
-
1988
- 1988-03-14 FI FI881192A patent/FI81395B/fi not_active Application Discontinuation
-
1989
- 1989-03-13 BR BR898907314A patent/BR8907314A/pt not_active IP Right Cessation
- 1989-03-13 JP JP1502856A patent/JPH03505758A/ja active Pending
- 1989-03-13 NZ NZ228308A patent/NZ228308A/xx unknown
- 1989-03-13 CA CA000593523A patent/CA1334581C/en not_active Expired - Lifetime
- 1989-03-13 AT AT89903748T patent/ATE135429T1/de active
- 1989-03-13 DE DE68925967T patent/DE68925967T2/de not_active Revoked
- 1989-03-13 AU AU32923/89A patent/AU626846B2/en not_active Ceased
- 1989-03-13 WO PCT/FI1989/000045 patent/WO1989008738A1/en not_active Application Discontinuation
- 1989-03-13 EP EP89903748A patent/EP0407421B1/en not_active Revoked
-
1990
- 1990-09-04 DK DK199002119A patent/DK175185B1/da not_active IP Right Cessation
- 1990-09-07 NO NO903913A patent/NO174722C/no not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
NO903913L (no) | 1990-09-07 |
DK211990A (da) | 1990-11-07 |
DE68925967D1 (de) | 1996-04-18 |
NZ228308A (en) | 1990-06-26 |
FI881192A0 (fi) | 1988-03-14 |
ATE135429T1 (de) | 1996-03-15 |
AU626846B2 (en) | 1992-08-13 |
FI881192A (fi) | 1989-09-15 |
CA1334581C (en) | 1995-02-28 |
JPH03505758A (ja) | 1991-12-12 |
EP0407421A1 (en) | 1991-01-16 |
NO903913D0 (no) | 1990-09-07 |
NO174722C (no) | 1994-06-22 |
DK211990D0 (da) | 1990-09-04 |
DE68925967T2 (de) | 1996-09-12 |
WO1989008738A1 (en) | 1989-09-21 |
AU3292389A (en) | 1989-10-05 |
BR8907314A (pt) | 1991-03-19 |
DK175185B1 (da) | 2004-06-28 |
EP0407421B1 (en) | 1996-03-13 |
NO174722B (no) | 1994-03-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
CD | Patent refused following opposition | ||
FC | Application refused |
Owner name: GENENCOR INTERNATIONAL EUROPE OY |