CA2553662C - Method for reducing the extractives content of high-yield pulps and method for producing bleached high-yield pulps - Google Patents

Method for reducing the extractives content of high-yield pulps and method for producing bleached high-yield pulps Download PDF

Info

Publication number: CA2553662C
Authority: CA; Canada
Prior art keywords: pulp; surfactant; peroxide bleaching; bleaching; extractives
Prior art date: 2004-02-24
Legal status (The legal status 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 status listed.): Expired - Lifetime

Application number

CA2553662A

Other languages

English (en)

French (fr)

Other versions

CA2553662A1 (en

Inventor

Aarto Paren

Jukka Jakara

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Kemira Oyj

Original Assignee

Kemira Oyj

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.)

2004-02-24

Filing date

2005-02-23

Publication date

2012-10-23

2005-02-23 Application filed by Kemira Oyj filed Critical Kemira Oyj

2005-09-01 Publication of CA2553662A1 publication Critical patent/CA2553662A1/en

2012-10-23 Application granted granted Critical

2012-10-23 Publication of CA2553662C publication Critical patent/CA2553662C/en

2025-02-23 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

Links

238000000034 method Methods 0.000 title claims abstract description 53
238000004519 manufacturing process Methods 0.000 title claims abstract description 6
238000004061 bleaching Methods 0.000 claims abstract description 77
150000002978 peroxides Chemical class 0.000 claims abstract description 48
239000003381 stabilizer Substances 0.000 claims abstract description 47
239000004094 surface-active agent Substances 0.000 claims abstract description 35
238000005406 washing Methods 0.000 claims abstract description 13
239000008346 aqueous phase Substances 0.000 claims abstract description 5
XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
239000002253 acid Substances 0.000 claims description 18
238000010790 dilution Methods 0.000 claims description 14
239000012895 dilution Substances 0.000 claims description 14
239000000203 mixture Substances 0.000 claims description 13
150000003839 salts Chemical class 0.000 claims description 12
239000002736 nonionic surfactant Substances 0.000 claims description 10
229920000642 polymer Polymers 0.000 claims description 10
SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 8
229920001577 copolymer Polymers 0.000 claims description 8
NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 7
CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims description 7
239000003945 anionic surfactant Substances 0.000 claims description 7
-1 alkyl phenol Chemical compound 0.000 claims description 5
229920001519 homopolymer Polymers 0.000 claims description 5
PSZYNBSKGUBXEH-UHFFFAOYSA-N naphthalene-1-sulfonic acid Chemical group C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 PSZYNBSKGUBXEH-UHFFFAOYSA-N 0.000 claims description 5
150000001991 dicarboxylic acids Chemical class 0.000 claims description 4
229920001732 Lignosulfonate Polymers 0.000 claims description 3
239000004117 Lignosulphonate Substances 0.000 claims description 3
239000003995 emulsifying agent Substances 0.000 claims description 3
235000019357 lignosulphonate Nutrition 0.000 claims description 3
OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 claims 2
125000000373 fatty alcohol group Chemical group 0.000 claims 2
VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 claims 2
239000011976 maleic acid Substances 0.000 claims 2
VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 claims 2
HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 15
NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 10
MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 9
235000019353 potassium silicate Nutrition 0.000 description 9
239000000126 substance Substances 0.000 description 9
229920001131 Pulp (paper) Polymers 0.000 description 8
150000007513 acids Chemical class 0.000 description 7
239000000243 solution Substances 0.000 description 7
239000000654 additive Substances 0.000 description 6
239000000706 filtrate Substances 0.000 description 6
239000011347 resin Substances 0.000 description 6
229920005989 resin Polymers 0.000 description 6
YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 5
235000014113 dietary fatty acids Nutrition 0.000 description 5
239000000194 fatty acid Substances 0.000 description 5
229930195729 fatty acid Natural products 0.000 description 5
150000004665 fatty acids Chemical class 0.000 description 5
CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical group [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 4
BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 4
VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
150000002191 fatty alcohols Chemical class 0.000 description 4
241000183024 Populus tremula Species 0.000 description 3
230000000996 additive effect Effects 0.000 description 3
125000000129 anionic group Chemical group 0.000 description 3
239000007844 bleaching agent Substances 0.000 description 3
239000002738 chelating agent Substances 0.000 description 3
230000000052 comparative effect Effects 0.000 description 3
150000002148 esters Chemical class 0.000 description 3
238000002474 experimental method Methods 0.000 description 3
239000000835 fiber Substances 0.000 description 3
229930013686 lignan Natural products 0.000 description 3
150000005692 lignans Chemical class 0.000 description 3
235000009408 lignans Nutrition 0.000 description 3
159000000000 sodium salts Chemical class 0.000 description 3
230000000087 stabilizing effect Effects 0.000 description 3
150000003505 terpenes Chemical class 0.000 description 3
235000007586 terpenes Nutrition 0.000 description 3
150000003626 triacylglycerols Chemical class 0.000 description 3
239000002023 wood Substances 0.000 description 3
LGJMUZUPVCAVPU-ANOYILKDSA-N (3s,8r,9s,10s,13r,14s,17r)-17-[(2r,5s)-5-ethyl-6-methylheptan-2-yl]-10,13-dimethyl-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1h-cyclopenta[a]phenanthren-3-ol Chemical class C1CC2C[C@@H](O)CC[C@]2(C)[C@@H]2[C@@H]1[C@@H]1CC[C@H]([C@H](C)CC[C@H](CC)C(C)C)[C@@]1(C)CC2 LGJMUZUPVCAVPU-ANOYILKDSA-N 0.000 description 2
NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 2
DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
ABLZXFCXXLZCGV-UHFFFAOYSA-N Phosphorous acid Chemical compound OP(O)=O ABLZXFCXXLZCGV-UHFFFAOYSA-N 0.000 description 2
ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 2
CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
229930182558 Sterol Natural products 0.000 description 2
239000013543 active substance Substances 0.000 description 2
239000003513 alkali Substances 0.000 description 2
150000001341 alkaline earth metal compounds Chemical class 0.000 description 2
150000003863 ammonium salts Chemical class 0.000 description 2
150000001875 compounds Chemical class 0.000 description 2
239000007859 condensation product Substances 0.000 description 2
NFDRPXJGHKJRLJ-UHFFFAOYSA-N edtmp Chemical compound OP(O)(=O)CN(CP(O)(O)=O)CCN(CP(O)(O)=O)CP(O)(O)=O NFDRPXJGHKJRLJ-UHFFFAOYSA-N 0.000 description 2
239000002657 fibrous material Substances 0.000 description 2
229910052943 magnesium sulfate Inorganic materials 0.000 description 2
235000019341 magnesium sulphate Nutrition 0.000 description 2
150000002989 phenols Chemical class 0.000 description 2
229940068065 phytosterols Drugs 0.000 description 2
239000011591 potassium Substances 0.000 description 2
229910052700 potassium Inorganic materials 0.000 description 2
239000000377 silicon dioxide Substances 0.000 description 2
235000015500 sitosterol Nutrition 0.000 description 2
229940083492 sitosterols Drugs 0.000 description 2
239000011734 sodium Substances 0.000 description 2
229910052708 sodium Inorganic materials 0.000 description 2
229910000029 sodium carbonate Inorganic materials 0.000 description 2
150000003432 sterols Chemical class 0.000 description 2
235000003702 sterols Nutrition 0.000 description 2
239000004753 textile Substances 0.000 description 2
102100031260 Acyl-coenzyme A thioesterase THEM4 Human genes 0.000 description 1
VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
229920000742 Cotton Polymers 0.000 description 1
241000196324 Embryophyta Species 0.000 description 1
241000233866 Fungi Species 0.000 description 1
101000638510 Homo sapiens Acyl-coenzyme A thioesterase THEM4 Proteins 0.000 description 1
FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
241000218657 Picea Species 0.000 description 1
239000002202 Polyethylene glycol Substances 0.000 description 1
239000004372 Polyvinyl alcohol Substances 0.000 description 1
239000004115 Sodium Silicate Substances 0.000 description 1
QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
YDONNITUKPKTIG-UHFFFAOYSA-N [Nitrilotris(methylene)]trisphosphonic acid Chemical compound OP(O)(=O)CN(CP(O)(O)=O)CP(O)(O)=O YDONNITUKPKTIG-UHFFFAOYSA-N 0.000 description 1
230000002378 acidificating effect Effects 0.000 description 1
229910052784 alkaline earth metal Inorganic materials 0.000 description 1
239000012670 alkaline solution Substances 0.000 description 1
244000052616 bacterial pathogen Species 0.000 description 1
229940043430 calcium compound Drugs 0.000 description 1
150000001674 calcium compounds Chemical class 0.000 description 1
125000003636 chemical group Chemical group 0.000 description 1
239000000470 constituent Substances 0.000 description 1
230000001627 detrimental effect Effects 0.000 description 1
239000002027 dichloromethane extract Substances 0.000 description 1
239000002270 dispersing agent Substances 0.000 description 1
DUYCTCQXNHFCSJ-UHFFFAOYSA-N dtpmp Chemical compound OP(=O)(O)CN(CP(O)(O)=O)CCN(CP(O)(=O)O)CCN(CP(O)(O)=O)CP(O)(O)=O DUYCTCQXNHFCSJ-UHFFFAOYSA-N 0.000 description 1
239000003792 electrolyte Substances 0.000 description 1
239000000284 extract Substances 0.000 description 1
239000012467 final product Substances 0.000 description 1
238000005187 foaming Methods 0.000 description 1
159000000011 group IA salts Chemical class 0.000 description 1
239000011121 hardwood Substances 0.000 description 1
238000005342 ion exchange Methods 0.000 description 1
150000002500 ions Chemical group 0.000 description 1
229910052749 magnesium Inorganic materials 0.000 description 1
239000011777 magnesium Substances 0.000 description 1
229910052748 manganese Inorganic materials 0.000 description 1
239000011572 manganese Substances 0.000 description 1
239000010813 municipal solid waste Substances 0.000 description 1
230000007935 neutral effect Effects 0.000 description 1
150000001451 organic peroxides Chemical class 0.000 description 1
239000003960 organic solvent Substances 0.000 description 1
239000002245 particle Substances 0.000 description 1
239000012071 phase Substances 0.000 description 1
150000003009 phosphonic acids Chemical class 0.000 description 1
229920005646 polycarboxylate Polymers 0.000 description 1
229920001223 polyethylene glycol Polymers 0.000 description 1
229920002451 polyvinyl alcohol Polymers 0.000 description 1
239000002244 precipitate Substances 0.000 description 1
238000001556 precipitation Methods 0.000 description 1
239000000047 product Substances 0.000 description 1
239000013055 pulp slurry Substances 0.000 description 1
239000002994 raw material Substances 0.000 description 1
238000001226 reprecipitation Methods 0.000 description 1
229910052911 sodium silicate Inorganic materials 0.000 description 1
RPACBEVZENYWOL-XFULWGLBSA-M sodium;(2r)-2-[6-(4-chlorophenoxy)hexyl]oxirane-2-carboxylate Chemical compound [Na+].C=1C=C(Cl)C=CC=1OCCCCCC[C@]1(C(=O)[O-])CO1 RPACBEVZENYWOL-XFULWGLBSA-M 0.000 description 1
239000011122 softwood Substances 0.000 description 1
241000894007 species Species 0.000 description 1
239000004575 stone Substances 0.000 description 1
229910021653 sulphate ion Inorganic materials 0.000 description 1
239000000080 wetting agent Substances 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
- D21C9/08—Removal of fats, resins, pitch or waxes; Chemical or physical purification, i.e. refining, of crude cellulose by removing non-cellulosic contaminants, optionally combined with bleaching
- 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
- 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
- D21C9/1036—Use of compounds accelerating or improving the efficiency of the processes

Landscapes

Life Sciences & Earth Sciences (AREA)
Engineering & Computer Science (AREA)
Wood Science & Technology (AREA)
Paper (AREA)
Extraction Or Liquid Replacement (AREA)
Steroid Compounds (AREA)

CA2553662A 2004-02-24 2005-02-23 Method for reducing the extractives content of high-yield pulps and method for producing bleached high-yield pulps Expired - Lifetime CA2553662C (en)

Applications Claiming Priority (3)

Application Number	Priority Date	Filing Date	Title
FI20040282A FI121385B (sv)	2004-02-24	2004-02-24	Förfarande för reducering av extraktämneshalten i högutbytesmassor och förfarande för framställning av blekta högutbytesmassor
FI20040282		2004-02-24
PCT/FI2005/000112 WO2005080672A2 (en)	2004-02-24	2005-02-23	Method for reducing the extractives content of high-yield pulps and method for producing bleached high-yield pulps

Publications (2)

Publication Number	Publication Date
CA2553662A1 CA2553662A1 (en)	2005-09-01
CA2553662C true CA2553662C (en)	2012-10-23

Family

ID=31725758

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
CA2553662A Expired - Lifetime CA2553662C (en)	2004-02-24	2005-02-23	Method for reducing the extractives content of high-yield pulps and method for producing bleached high-yield pulps

Country Status (9)

Country	Link
US (1)	US20070272378A1 (sv)
EP (1)	EP1718801B1 (sv)
CN (1)	CN100591842C (sv)
AT (1)	ATE376094T1 (sv)
BR (1)	BRPI0507851A (sv)
CA (1)	CA2553662C (sv)
DE (1)	DE602005002933T2 (sv)
FI (1)	FI121385B (sv)
WO (1)	WO2005080672A2 (sv)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FI20070126A0 (sv)	2006-09-08	2007-02-13	Linde Ag	Förfarande för avhartsning av massa och användning av koldioxid eller (bi)karbonat för detta
WO2013178875A1 (en) *	2012-05-29	2013-12-05	Kemira Oyj	A process for the treatment of fibre material and a new composition
TW201544652A (zh) *	2014-05-20	2015-12-01	Georgia Pacific Consumer Prod	非木材纖維之漂白及植物性雜質減量方法
TW201610261A (zh)	2014-05-20	2016-03-16	喬治亞太平洋消費者產品公司	非木材纖維之漂白及植物性雜質減量方法
TW201610265A (zh)	2014-05-20	2016-03-16	喬治亞太平洋消費者產品公司	非木材纖維之漂白及植物性雜質減量方法
CA3075029A1 (en)	2017-09-11	2019-03-14	Solenis Technologies, L.P.	Method for enhanced oxygen delignification of chemical wood pulps
WO2020093280A1 (en) *	2018-11-07	2020-05-14	Kemira Oyj	A composition for use as peroxide stabilizer

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
LU74434A1 (sv) *	1976-02-25	1977-09-12
DE3423452A1 (de) *	1984-06-26	1986-01-02	Sandoz-Patent-GmbH, 7850 Lörrach	Stabilisierende mischung zur peroxidbleiche zellulosehaltiger materialien
US4963157A (en) *	1987-04-17	1990-10-16	Nippon Peroxide Co., Ltd.	Method for bleaching cellulosic fiber material with hydrogen peroxide
US5234544A (en) *	1989-10-18	1993-08-10	Air Products And Chemicals, Inc.	Cleaning and bleaching of secondary fiber
JP3191828B2 (ja) *	1992-05-27	2001-07-23	三菱瓦斯化学株式会社	印刷古紙の脱墨漂白方法
DE4344029A1 (de) *	1993-12-23	1995-06-29	Grillo Werke Ag	Copolymerisate ungesättigter Carbonsäuren, Verfahren zur Herstellung und ihre Verwendung
CN1088484C (zh) *	1999-06-15	2002-07-31	杭州市化工研究所	造纸用树脂障碍控制剂
CA2403494C (en) *	2000-03-23	2009-01-27	Hercules Incorporated	Proteins and polymers for use as pitch and stickies control agents in pulp and papermaking processes

2004
- 2004-02-24 FI FI20040282A patent/FI121385B/sv active IP Right Grant
2005
- 2005-02-23 DE DE602005002933T patent/DE602005002933T2/de not_active Expired - Lifetime
- 2005-02-23 US US10/590,297 patent/US20070272378A1/en not_active Abandoned
- 2005-02-23 WO PCT/FI2005/000112 patent/WO2005080672A2/en not_active Ceased
- 2005-02-23 CN CN200580005933A patent/CN100591842C/zh not_active Expired - Lifetime
- 2005-02-23 AT AT05717239T patent/ATE376094T1/de not_active IP Right Cessation
- 2005-02-23 CA CA2553662A patent/CA2553662C/en not_active Expired - Lifetime
- 2005-02-23 BR BRPI0507851-2A patent/BRPI0507851A/pt not_active IP Right Cessation
- 2005-02-23 EP EP05717239A patent/EP1718801B1/en not_active Expired - Lifetime

Also Published As

Publication number	Publication date
EP1718801B1 (en)	2007-10-17
FI20040282L (sv)	2005-08-25
BRPI0507851A (pt)	2007-07-10
CN100591842C (zh)	2010-02-24
WO2005080672A3 (en)	2005-12-08
DE602005002933T2 (de)	2008-07-24
CA2553662A1 (en)	2005-09-01
FI20040282A0 (sv)	2004-02-24
US20070272378A1 (en)	2007-11-29
WO2005080672A2 (en)	2005-09-01
DE602005002933D1 (de)	2007-11-29
ATE376094T1 (de)	2007-11-15
FI121385B (sv)	2010-10-29
CN1922359A (zh)	2007-02-28
EP1718801A2 (en)	2006-11-08

Publication	Publication Date	Title
US8066846B2 (en)	2011-11-29	Composition and process for the treatment of fibre material
WO1997039179A1 (en)	1997-10-23	Method for bleaching of lignocellulosic fibers
JPH08503750A (ja)	1996-04-23	リグノセルロース含有パルプの脱リグニン化法
CA2168288C (en)	2002-08-20	Bleaching compositions comprising sulfamates and borates or gluconates and processes
CA2553662C (en)	2012-10-23	Method for reducing the extractives content of high-yield pulps and method for producing bleached high-yield pulps
CA2512141C (en)	2010-12-21	Bleaching of cellulosic fibre material with peroxide using polymers as a stabiliser
US7867357B2 (en)	2011-01-11	Polymer composition for peroxide bleaching of cellulosic fibre material and processes for peroxide bleaching
EP1945852B1 (en)	2010-03-31	Use of carbonate ions for the solubilization of wood extractives in a process for deresination of pulp
EP0670929B2 (en)	2003-10-22	Process for bleaching of lignocellulose-containing pulp
RU2097462C1 (ru)	1997-11-27	Способ делигнификации и отбеливания лигноцеллюлозосодержащей пульпы
CZ224193A3 (en)	1994-05-18	Process of separating a cellulose containing lignocellulose

Legal Events

Date	Code	Title	Description
2010-01-08	EEER	Examination request