NO320161B1 - Fremgangsmate for fremstilling av bleket cellulosemasse - Google Patents

Fremgangsmate for fremstilling av bleket cellulosemasse Download PDF

Info

Publication number: NO320161B1
Authority: NO; Norway
Prior art keywords: bleaching; pulp; cellulose; mass; cellulose pulp
Prior art date: 1994-04-05

Application number

NO19964223A

Other languages

English (en)

Norwegian (no)

Other versions

NO964223D0 (no

NO964223L (no

Inventor

Sture Erik Olof Noreus

Jan Georg Liden

Lars Ake Gunnar Ahlenius

Otto Sten Axel Gusta Lindeberg

Original Assignee

Real Sverige Ab M

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.)

1994-04-05

Filing date

1996-10-04

Publication date

2005-11-07

1996-10-04 Application filed by Real Sverige Ab M filed Critical Real Sverige Ab M

1996-10-04 Publication of NO964223D0 publication Critical patent/NO964223D0/no

1996-10-04 Publication of NO964223L publication Critical patent/NO964223L/no

2005-11-07 Publication of NO320161B1 publication Critical patent/NO320161B1/no

Links

229920002678 cellulose Polymers 0.000 title claims abstract description 164
239000001913 cellulose Substances 0.000 title claims abstract description 164
238000004519 manufacturing process Methods 0.000 title claims abstract description 22
OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 claims abstract description 185
238000004061 bleaching Methods 0.000 claims abstract description 168
239000004155 Chlorine dioxide Substances 0.000 claims abstract description 93
235000019398 chlorine dioxide Nutrition 0.000 claims abstract description 93
238000005406 washing Methods 0.000 claims abstract description 93
238000000034 method Methods 0.000 claims abstract description 58
239000011777 magnesium Substances 0.000 claims abstract description 56
239000000725 suspension Substances 0.000 claims abstract description 52
FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 49
229910052749 magnesium Inorganic materials 0.000 claims abstract description 49
239000007844 bleaching agent Substances 0.000 claims abstract description 37
239000008139 complexing agent Substances 0.000 claims abstract description 36
229910052760 oxygen Inorganic materials 0.000 claims abstract description 29
238000009896 oxidative bleaching Methods 0.000 claims abstract description 6
239000007788 liquid Substances 0.000 claims description 98
MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 63
239000011572 manganese Substances 0.000 claims description 50
PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 37
229910052748 manganese Inorganic materials 0.000 claims description 37
QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 28
239000001301 oxygen Substances 0.000 claims description 28
150000002978 peroxides Chemical class 0.000 claims description 26
BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 22
KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 claims description 21
230000001590 oxidative effect Effects 0.000 claims description 15
238000010411 cooking Methods 0.000 claims description 14
239000012978 lignocellulosic material Substances 0.000 claims description 12
230000008569 process Effects 0.000 claims description 12
CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 7
150000001875 compounds Chemical class 0.000 claims description 7
238000012545 processing Methods 0.000 claims description 7
QPCDCPDFJACHGM-UHFFFAOYSA-N N,N-bis{2-[bis(carboxymethyl)amino]ethyl}glycine Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(=O)O)CCN(CC(O)=O)CC(O)=O QPCDCPDFJACHGM-UHFFFAOYSA-N 0.000 claims description 6
229960003330 pentetic acid Drugs 0.000 claims description 6
-1 per-compound Chemical compound 0.000 claims description 6
239000003638 chemical reducing agent Substances 0.000 claims description 3
238000006243 chemical reaction Methods 0.000 claims description 2
ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 abstract description 9
239000000460 chlorine Substances 0.000 abstract description 9
229910052801 chlorine Inorganic materials 0.000 abstract description 9
WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 abstract description 6
230000029087 digestion Effects 0.000 abstract description 5
239000000463 material Substances 0.000 abstract description 3
MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 abstract 1
229910001882 dioxygen Inorganic materials 0.000 abstract 1
HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 63
238000007792 addition Methods 0.000 description 34
238000002474 experimental method Methods 0.000 description 29
238000003860 storage Methods 0.000 description 28
238000009897 hydrogen peroxide bleaching Methods 0.000 description 18
230000000536 complexating effect Effects 0.000 description 17
CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 16
QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 15
239000000126 substance Substances 0.000 description 15
XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 14
QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 12
229910021653 sulphate ion Inorganic materials 0.000 description 12
238000012360 testing method Methods 0.000 description 12
CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 10
229910052751 metal Inorganic materials 0.000 description 9
239000002184 metal Substances 0.000 description 9
239000012153 distilled water Substances 0.000 description 8
229920005610 lignin Polymers 0.000 description 8
229910052943 magnesium sulfate Inorganic materials 0.000 description 8
235000019341 magnesium sulphate Nutrition 0.000 description 8
239000002023 wood Substances 0.000 description 8
230000008901 benefit Effects 0.000 description 7
150000002739 metals Chemical class 0.000 description 6
239000004033 plastic Substances 0.000 description 6
235000018185 Betula X alpestris Nutrition 0.000 description 5
235000018212 Betula X uliginosa Nutrition 0.000 description 5
241000196324 Embryophyta Species 0.000 description 5
CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 5
239000003513 alkali Substances 0.000 description 5
229910002092 carbon dioxide Inorganic materials 0.000 description 5
239000011122 softwood Substances 0.000 description 5
239000000243 solution Substances 0.000 description 5
238000010561 standard procedure Methods 0.000 description 5
VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 4
KFSLWBXXFJQRDL-UHFFFAOYSA-N Peracetic acid Chemical compound CC(=O)OO KFSLWBXXFJQRDL-UHFFFAOYSA-N 0.000 description 4
239000001569 carbon dioxide Substances 0.000 description 4
150000002696 manganese Chemical class 0.000 description 4
239000000203 mixture Substances 0.000 description 4
239000007858 starting material Substances 0.000 description 4
229910052723 transition metal Inorganic materials 0.000 description 4
150000003624 transition metals Chemical class 0.000 description 4
235000008331 Pinus X rigitaeda Nutrition 0.000 description 3
235000011613 Pinus brutia Nutrition 0.000 description 3
241000018646 Pinus brutia Species 0.000 description 3
238000010586 diagram Methods 0.000 description 3
238000006073 displacement reaction Methods 0.000 description 3
239000004744 fabric Substances 0.000 description 3
238000005470 impregnation Methods 0.000 description 3
238000000691 measurement method Methods 0.000 description 3
238000011084 recovery Methods 0.000 description 3
238000012216 screening Methods 0.000 description 3
239000004460 silage Substances 0.000 description 3
235000011149 sulphuric acid Nutrition 0.000 description 3
238000004448 titration Methods 0.000 description 3
239000002253 acid Substances 0.000 description 2
BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 2
230000008859 change Effects 0.000 description 2
238000004140 cleaning Methods 0.000 description 2
238000007796 conventional method Methods 0.000 description 2
230000007423 decrease Effects 0.000 description 2
238000013461 design Methods 0.000 description 2
238000007865 diluting Methods 0.000 description 2
238000001704 evaporation Methods 0.000 description 2
230000008020 evaporation Effects 0.000 description 2
229910052739 hydrogen Inorganic materials 0.000 description 2
239000001257 hydrogen Substances 0.000 description 2
150000002431 hydrogen Chemical class 0.000 description 2
238000009533 lab test Methods 0.000 description 2
239000006194 liquid suspension Substances 0.000 description 2
229910001437 manganese ion Inorganic materials 0.000 description 2
239000002994 raw material Substances 0.000 description 2
230000009467 reduction Effects 0.000 description 2
BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 1
241000218631 Coniferophyta Species 0.000 description 1
JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical group [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 1
NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
230000009102 absorption Effects 0.000 description 1
238000010521 absorption reaction Methods 0.000 description 1
239000002535 acidifier Substances 0.000 description 1
230000006978 adaptation Effects 0.000 description 1
230000002411 adverse Effects 0.000 description 1
238000004458 analytical method Methods 0.000 description 1
230000009286 beneficial effect Effects 0.000 description 1
238000009835 boiling Methods 0.000 description 1
230000015556 catabolic process Effects 0.000 description 1
239000003054 catalyst Substances 0.000 description 1
150000001805 chlorine compounds Chemical class 0.000 description 1
MAYPHUUCLRDEAZ-UHFFFAOYSA-N chlorine peroxide Inorganic materials ClOOCl MAYPHUUCLRDEAZ-UHFFFAOYSA-N 0.000 description 1
229910001919 chlorite Inorganic materials 0.000 description 1
229910052619 chlorite group Inorganic materials 0.000 description 1
QBWCMBCROVPCKQ-UHFFFAOYSA-N chlorous acid Chemical compound OCl=O QBWCMBCROVPCKQ-UHFFFAOYSA-N 0.000 description 1
238000002485 combustion reaction Methods 0.000 description 1
230000000295 complement effect Effects 0.000 description 1
239000012141 concentrate Substances 0.000 description 1
238000005260 corrosion Methods 0.000 description 1
230000007797 corrosion Effects 0.000 description 1
238000000354 decomposition reaction Methods 0.000 description 1
238000010790 dilution Methods 0.000 description 1
239000012895 dilution Substances 0.000 description 1
230000000694 effects Effects 0.000 description 1
238000005516 engineering process Methods 0.000 description 1
230000007613 environmental effect Effects 0.000 description 1
238000000605 extraction Methods 0.000 description 1
239000000835 fiber Substances 0.000 description 1
239000012530 fluid Substances 0.000 description 1
229910052736 halogen Inorganic materials 0.000 description 1
150000002367 halogens Chemical class 0.000 description 1
231100001240 inorganic pollutant Toxicity 0.000 description 1
229910001425 magnesium ion Inorganic materials 0.000 description 1
238000005259 measurement Methods 0.000 description 1
230000007935 neutral effect Effects 0.000 description 1
150000001451 organic peroxides Chemical class 0.000 description 1
AZQWKYJCGOJGHM-UHFFFAOYSA-N para-benzoquinone Natural products O=C1C=CC(=O)C=C1 AZQWKYJCGOJGHM-UHFFFAOYSA-N 0.000 description 1
125000005385 peroxodisulfate group Chemical group 0.000 description 1
229920001021 polysulfide Polymers 0.000 description 1
239000005077 polysulfide Substances 0.000 description 1
150000008117 polysulfides Polymers 0.000 description 1
230000008092 positive effect Effects 0.000 description 1
238000001556 precipitation Methods 0.000 description 1
230000009103 reabsorption Effects 0.000 description 1
238000004064 recycling Methods 0.000 description 1
230000000717 retained effect Effects 0.000 description 1
238000004088 simulation Methods 0.000 description 1
PFUVRDFDKPNGAV-UHFFFAOYSA-N sodium peroxide Chemical compound [Na+].[Na+].[O-][O-] PFUVRDFDKPNGAV-UHFFFAOYSA-N 0.000 description 1
229910052717 sulfur Inorganic materials 0.000 description 1
239000011593 sulfur Substances 0.000 description 1
238000012546 transfer Methods 0.000 description 1

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
- D21C9/144—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites with ClO2/Cl2 and other bleaching agents in a multistage process
- 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
- D21C9/1042—Use of chelating agents

Landscapes

Life Sciences & Earth Sciences (AREA)
Engineering & Computer Science (AREA)
Wood Science & Technology (AREA)
Paper (AREA)
Coloring Foods And Improving Nutritive Qualities (AREA)
Silver Salt Photography Or Processing Solution Therefor (AREA)
Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
Catalysts (AREA)
Polysaccharides And Polysaccharide Derivatives (AREA)

NO19964223A 1994-04-05 1996-10-04 Fremgangsmate for fremstilling av bleket cellulosemasse NO320161B1 (no)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
SE9401125A SE502706E (sv)	1994-04-05	1994-04-05	Framställnng av blekt cellulosamassa genom blekning med klordioxid och behandling av komplexbildare i samma steg
PCT/SE1995/000361 WO1995027100A1 (en)	1994-04-05	1995-04-04	Method for complex treatment of pulp in conjunction with a chlorine dioxide stage

Publications (3)

Publication Number	Publication Date
NO964223D0 NO964223D0 (no)	1996-10-04
NO964223L NO964223L (no)	1996-10-04
NO320161B1 true NO320161B1 (no)	2005-11-07

Family

ID=20393524

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
NO19964223A NO320161B1 (no)	1994-04-05	1996-10-04	Fremgangsmate for fremstilling av bleket cellulosemasse

Country Status (15)

Country	Link
US (1)	US6258208B1 (de)
EP (1)	EP0754258B1 (de)
JP (1)	JP3716349B2 (de)
AT (1)	ATE212086T1 (de)
AU (1)	AU690254B2 (de)
BR (1)	BR9507286A (de)
CA (1)	CA2185808C (de)
DE (1)	DE69525045T2 (de)
ES (1)	ES2166398T3 (de)
FI (1)	FI116392B (de)
NO (1)	NO320161B1 (de)
NZ (1)	NZ283828A (de)
PT (1)	PT754258E (de)
SE (1)	SE502706E (de)
WO (1)	WO1995027100A1 (de)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
SE514697C2 (sv)	1994-08-31	2001-04-02	Valmet Fibertech Ab	Eliminering av metalljoner vid blekning av massa
US6706143B1 (en) *	1996-03-19	2004-03-16	International Paper Company	Minimizing chlorinated organics in pulp bleaching processes
US6375797B1 (en) *	1996-06-20	2002-04-23	Andritz-Ahlstrom Oy	Bleaching chemical pulp in a PkDQ-Po Sequence
SE507742C2 (sv) *	1996-11-08	1998-07-06	Sunds Defibrator Ind Ab	Förblekningsbehandling av pappersmassa med klordioxid, alkali och komplexbildare utan mellanliggande tvättar
FI105214B (fi)	1997-11-13	2000-06-30	Kemira Chemicals Oy	Tehostettu kemiallisen massan valkaisumenetelmä
US7368036B2 (en) *	2002-03-06	2008-05-06	Iogen Bio-Products Corporation	Xylanase treatment of chemical pulp
SE0200981D0 (sv) *	2002-03-28	2002-03-28	Eka Chemicals Ab	Process for bleaching lignocellulose-containing non-wood pulp
US20050045291A1 (en) *	2002-08-08	2005-03-03	Martin Ragnar	Reduction of organically bound chlorine formed in chlorine dioxide bleaching
SE521780C2 (sv) *	2003-01-31	2003-12-09	Kvaerner Pulping Tech	Förfarande för blekning av cellulosamassa samt bleklinje härför
US7541396B2 (en) *	2004-12-29	2009-06-02	Weyerhaeuser Nr Company	Method for making carboxyalkyl cellulose
FI123102B (fi) *	2006-03-31	2012-11-15	Laennen Tutkimus Western Res Inc Oy	Kemiallisen massan valkaisumenetelmä
FI122626B (fi) *	2006-03-31	2012-04-30	Laennen Tutkimus Western Res Inc Oy	Kemiallisen massan valkaisumenetelmä
US20080110584A1 (en) *	2006-11-15	2008-05-15	Caifang Yin	Bleaching process with at least one extraction stage
US7976677B2 (en) *	2006-12-18	2011-07-12	International Paper Company	Process of bleaching hardwood pulps in a D1 or D2 stage in a presence of a weak base
US7976676B2 (en) *	2006-12-18	2011-07-12	International Paper Company	Process of bleaching softwood pulps in a D1 or D2 stage in a presence of a weak base
WO2008101952A1 (en) *	2007-02-21	2008-08-28	Solvay (Societe Anonyme)	Process for the bleaching of paper pulp
CN103635628B (zh) *	2011-06-30	2018-03-09	纳米绿色生物炼制公司	生物质的催化转化
US11168151B2 (en)	2016-01-28	2021-11-09	Nano-Green Biorefineries Inc.	Production of crystalline cellulose
FR3062138B1 (fr) *	2017-01-23	2019-06-07	Centre Technique De L'industrie Des Papiers, Cartons Et Celluloses	Procede de blanchiment d'une pate a papier
SE544255C2 (en) *	2020-09-03	2022-03-15	Valmet Oy	System for producing cellulose pulp and method for controlling such a system
SE545758C2 (en) *	2022-06-20	2024-01-02	Valmet Oy	Method for bleaching pulp from recycled textile material

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE2219504C2 (de)	1972-04-21	1974-10-03	Deutsche Gold- Und Silber-Scheideanstalt Vormals Roessler, 6000 Frankfurt	Mehrstufenbleiche von Zellstoffen mit erheblich reduziertem Chloreinsatz
DE2841013C2 (de) *	1978-09-21	1984-06-07	Degussa Ag, 6000 Frankfurt	Verfahren zur Vollbleiche von Zellstoff
US4238282A (en) *	1979-07-23	1980-12-09	Nalco Chemical Company	Chemical treatments in bleaching stages which increase pulp brightness
DE3773204D1 (de)	1986-12-22	1991-10-24	Aga Ab, Lidingoe, Se
US4959124A (en)	1989-05-05	1990-09-25	International Paper Company	Method of bleaching kraft pulp in a DZED sequence
DE402335T1 (de) *	1989-06-06	1992-04-09	Eka Nobel Ab, Surte	Verfahren zum bleichen von lignocellulose enthaltenden zellstoffen.
SE9000340L (sv)	1990-01-31	1991-08-01	Eka Nobel Ab	Foerfarande vid blekning av lignocellulosahaltigt material
SE466061B (sv)	1990-04-23	1991-12-09	Eka Nobel Ab	Blekning av kemisk massa genom behandling med foerst ett komplexbildande aemne och sedan ett peroxidinnehaallande aemne
US5164044A (en) *	1990-05-17	1992-11-17	Union Camp Patent Holding, Inc.	Environmentally improved process for bleaching lignocellulosic materials with ozone
US5352332A (en) *	1991-01-28	1994-10-04	Maples Gerald E	Process for recycling bleach plant filtrate
CA2150810A1 (en)	1993-03-12	1994-09-15	Karl-Erik L. Eriksson	Process for bleaching pulp
EP0622491B2 (de)	1993-04-20	2002-07-17	Eka Chemicals AB	Verfahren zum Bleichen von Lignozellulose-enthaltendem Zellstoff

1994
- 1994-04-05 SE SE9401125A patent/SE502706E/xx unknown
1995
- 1995-04-04 CA CA002185808A patent/CA2185808C/en not_active Expired - Fee Related
- 1995-04-04 EP EP95915365A patent/EP0754258B1/de not_active Expired - Lifetime
- 1995-04-04 US US08/714,171 patent/US6258208B1/en not_active Expired - Fee Related
- 1995-04-04 DE DE69525045T patent/DE69525045T2/de not_active Expired - Fee Related
- 1995-04-04 AU AU22264/95A patent/AU690254B2/en not_active Ceased
- 1995-04-04 BR BR9507286A patent/BR9507286A/pt not_active IP Right Cessation
- 1995-04-04 JP JP52562095A patent/JP3716349B2/ja not_active Expired - Fee Related
- 1995-04-04 NZ NZ283828A patent/NZ283828A/en unknown
- 1995-04-04 WO PCT/SE1995/000361 patent/WO1995027100A1/en not_active Ceased
- 1995-04-04 PT PT95915365T patent/PT754258E/pt unknown
- 1995-04-04 ES ES95915365T patent/ES2166398T3/es not_active Expired - Lifetime
- 1995-04-04 AT AT95915365T patent/ATE212086T1/de not_active IP Right Cessation
1996
- 1996-10-04 FI FI963985A patent/FI116392B/fi active IP Right Grant
- 1996-10-04 NO NO19964223A patent/NO320161B1/no unknown

Also Published As

Publication number	Publication date
NZ283828A (en)	1997-05-26
SE9401125D0 (sv)	1994-04-05
SE9401125L (sv)	1995-10-06
PT754258E (pt)	2002-06-28
FI963985A0 (fi)	1996-10-04
FI116392B (fi)	2005-11-15
EP0754258A1 (de)	1997-01-22
WO1995027100A1 (en)	1995-10-12
AU2226495A (en)	1995-10-23
FI963985L (fi)	1996-10-04
SE502706E (sv)	1999-09-27
DE69525045T2 (de)	2002-08-29
EP0754258B1 (de)	2002-01-16
NO964223D0 (no)	1996-10-04
CA2185808A1 (en)	1995-10-12
AU690254B2 (en)	1998-04-23
US6258208B1 (en)	2001-07-10
DE69525045D1 (de)	2002-02-21
ATE212086T1 (de)	2002-02-15
SE502706C2 (sv)	1995-12-11
CA2185808C (en)	2004-11-30
JPH09511031A (ja)	1997-11-04
JP3716349B2 (ja)	2005-11-16
BR9507286A (pt)	1997-09-23
ES2166398T3 (es)	2002-04-16
NO964223L (no)	1996-10-04

Publication	Publication Date	Title
NO320161B1 (no)	2005-11-07	Fremgangsmate for fremstilling av bleket cellulosemasse
FI67242B (fi)	1984-10-31	Saett att avlaegsna lignin fraon oblekt kemisk pappersmassa
NO153582B (no)	1986-01-06	Fremgangsmaate ved bleking og ekstraksjon av lignocelluloseholdige materialer.
JPS6012477B2 (ja)	1985-04-01	リグノセルロ−ス物質の連続アルカリ脱リグニン化法
CN102704305A (zh)	2012-10-03	漂白纸浆的制备方法以及一种纸
US6126782A (en)	2000-10-03	Method for non-chlorine bleaching of cellulose pulp with a totally closed counter-current liquid circuit
NO176059B (no)	1994-10-17	Fremgangsmåte for å nedsette mengden av organisk halogensubstans i avlöpsvann fra delignifisering og bleking av kjemisk oppsluttet lignocelluloseholdig masse
FI105213B (fi)	2000-06-30	Menetelmä valkaistun massan valmistamiseksi lignoselluloosamateriaalista
AU2010200081B2 (en)	2014-03-20	Process for adjusting the pH of a cellulosic pulp, production of pulp or paper from cellulosic pulp and use of (bi)carbonate removal for reducing the consumption of acid
US6679972B1 (en)	2004-01-20	Process for the bleaching of a pulp suspension by separating calcium from lignin
WO1996037654A1 (en)	1996-11-28	Bleaching of cellulose pulp in one and the same stage with a complexing agent, a molybdenum containing substance and an oxidative bleaching agent
US20120031575A1 (en)	2012-02-09	Pulp Bleaching and Alkaline Extraction Method
CN101864687A (zh)	2010-10-20	苇浆漂白工艺
US8980051B2 (en)	2015-03-17	Sulfonation of pulp produced by alkali pulping process
WO1995006772A1 (en)	1995-03-09	Improved method for bleaching lignocellulosic pulp
JP2011001637A (ja)	2011-01-06	漂白パルプの製造方法
CA1288906C (en)	1991-09-17	Pulp souring process enhancing conservation of specific bleaching agent residuals
JP2004339628A (ja)	2004-12-02	漂白パルプの製造方法
JPH08260370A (ja)	1996-10-08	リグノセルロース物質の漂白方法
JP2003278088A (ja)	2003-10-02	Ｅｃｆ漂白パルプの製造方法
US20070051483A1 (en)	2007-03-08	Process for Bleaching Kraft Pulp