CA2224713A1 - Procede de delignification a l'oxygene d'une pate a papier - Google Patents

Procede de delignification a l'oxygene d'une pate a papier Download PDF

Info

Publication number: CA2224713A1
Authority: CA; Canada
Prior art keywords: oxygen; dough; peracetic acid; delignification; acid
Prior art date: 1996-04-12
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.): Abandoned

Application number

CA 2224713

Other languages

English (en)

French (fr)

Inventor

Pierre Larnicol

Henry Ledon

Michel Muguet

Jean-Marc Rabillier

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.)

Chemoxal SA

LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude

Original Assignee

Individual

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.)

1996-04-12

Filing date

1997-04-11

Publication date

1997-10-23

1997-04-11 Application filed by Individual filed Critical Individual

1997-10-23 Publication of CA2224713A1 publication Critical patent/CA2224713A1/fr

Status Abandoned legal-status Critical Current

Links

QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 88
239000001301 oxygen Substances 0.000 title claims abstract description 88
229910052760 oxygen Inorganic materials 0.000 title claims abstract description 88
238000000034 method Methods 0.000 title claims abstract description 46
229920001131 Pulp (paper) Polymers 0.000 title abstract description 5
KFSLWBXXFJQRDL-UHFFFAOYSA-N Peracetic acid Chemical compound CC(=O)OO KFSLWBXXFJQRDL-UHFFFAOYSA-N 0.000 claims abstract description 99
150000004967 organic peroxy acids Chemical class 0.000 claims abstract description 11
239000002253 acid Substances 0.000 claims description 44
238000011282 treatment Methods 0.000 claims description 36
230000008569 process Effects 0.000 claims description 26
238000002347 injection Methods 0.000 claims description 17
239000007924 injection Substances 0.000 claims description 17
229920005610 lignin Polymers 0.000 claims description 12
230000009920 chelation Effects 0.000 claims description 11
239000003795 chemical substances by application Substances 0.000 claims description 10
238000004061 bleaching Methods 0.000 claims description 9
229920002678 cellulose Polymers 0.000 claims description 8
239000001913 cellulose Substances 0.000 claims description 8
230000000694 effects Effects 0.000 claims description 8
150000002978 peroxides Chemical class 0.000 claims description 6
239000000203 mixture Substances 0.000 claims description 5
239000000243 solution Substances 0.000 claims description 5
239000001257 hydrogen Substances 0.000 claims description 4
229910052739 hydrogen Inorganic materials 0.000 claims description 4
150000004965 peroxy acids Chemical class 0.000 claims description 4
150000003839 salts Chemical class 0.000 claims description 4
UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 3
238000010533 azeotropic distillation Methods 0.000 claims description 3
OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 2
150000007513 acids Chemical class 0.000 claims description 2
229910052783 alkali metal Inorganic materials 0.000 claims description 2
229910052500 inorganic mineral Inorganic materials 0.000 claims description 2
159000000003 magnesium salts Chemical class 0.000 claims description 2
239000011707 mineral Substances 0.000 claims description 2
239000011574 phosphorus Substances 0.000 claims description 2
229910052698 phosphorus Inorganic materials 0.000 claims description 2
150000001340 alkali metals Chemical class 0.000 claims 1
150000002431 hydrogen Chemical class 0.000 claims 1
230000004913 activation Effects 0.000 abstract description 3
238000005406 washing Methods 0.000 description 29
MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 18
HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 18
239000002655 kraft paper Substances 0.000 description 14
ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 13
239000000460 chlorine Substances 0.000 description 13
229910052801 chlorine Inorganic materials 0.000 description 13
OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 description 13
XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
FFHWGQQFANVOHV-UHFFFAOYSA-N dimethyldioxirane Chemical compound CC1(C)OO1 FFHWGQQFANVOHV-UHFFFAOYSA-N 0.000 description 9
239000008367 deionised water Substances 0.000 description 8
229910021641 deionized water Inorganic materials 0.000 description 8
238000010790 dilution Methods 0.000 description 8
239000012895 dilution Substances 0.000 description 8
235000015927 pasta Nutrition 0.000 description 8
239000011122 softwood Substances 0.000 description 8
QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 7
125000002737 ampicillanyl group Chemical group N[C@@H](C(=O)N[C@H]1[C@@H]2N([C@H](C(S2)(C)C)C(=O)*)C1=O)C1=CC=CC=C1 0.000 description 7
238000010411 cooking Methods 0.000 description 7
229910052943 magnesium sulfate Inorganic materials 0.000 description 7
239000004155 Chlorine dioxide Substances 0.000 description 6
CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 6
238000010306 acid treatment Methods 0.000 description 6
235000019398 chlorine dioxide Nutrition 0.000 description 6
239000000123 paper Substances 0.000 description 6
239000003153 chemical reaction reagent Substances 0.000 description 5
JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 5
FHHJDRFHHWUPDG-UHFFFAOYSA-N peroxysulfuric acid Chemical compound OOS(O)(=O)=O FHHJDRFHHWUPDG-UHFFFAOYSA-N 0.000 description 5
MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 description 4
230000009467 reduction Effects 0.000 description 4
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 description 3
CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 3
230000008901 benefit Effects 0.000 description 3
230000015556 catabolic process Effects 0.000 description 3
238000006243 chemical reaction Methods 0.000 description 3
238000006731 degradation reaction Methods 0.000 description 3
238000004821 distillation Methods 0.000 description 3
230000002255 enzymatic effect Effects 0.000 description 3
235000019341 magnesium sulphate Nutrition 0.000 description 3
230000014759 maintenance of location Effects 0.000 description 3
239000011814 protection agent Substances 0.000 description 3
229910001868 water Inorganic materials 0.000 description 3
CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
-1 NOX nitrogen oxides Chemical class 0.000 description 2
238000005660 chlorination reaction Methods 0.000 description 2
230000008030 elimination Effects 0.000 description 2
238000003379 elimination reaction Methods 0.000 description 2
238000000605 extraction Methods 0.000 description 2
229910052751 metal Inorganic materials 0.000 description 2
239000002184 metal Substances 0.000 description 2
229910021645 metal ion Inorganic materials 0.000 description 2
150000002739 metals Chemical class 0.000 description 2
VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
230000007935 neutral effect Effects 0.000 description 2
MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 2
150000004045 organic chlorine compounds Chemical class 0.000 description 2
239000007800 oxidant agent Substances 0.000 description 2
ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 2
238000002203 pretreatment Methods 0.000 description 2
238000004076 pulp bleaching Methods 0.000 description 2
238000004064 recycling Methods 0.000 description 2
LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 description 2
GLVYLTSKTCWWJR-UHFFFAOYSA-N 2-carbonoperoxoylbenzoic acid Chemical compound OOC(=O)C1=CC=CC=C1C(O)=O GLVYLTSKTCWWJR-UHFFFAOYSA-N 0.000 description 1
LJGHYPLBDBRCRZ-UHFFFAOYSA-N 3-(3-aminophenyl)sulfonylaniline Chemical compound NC1=CC=CC(S(=O)(=O)C=2C=C(N)C=CC=2)=C1 LJGHYPLBDBRCRZ-UHFFFAOYSA-N 0.000 description 1
YNJSNEKCXVFDKW-UHFFFAOYSA-N 3-(5-amino-1h-indol-3-yl)-2-azaniumylpropanoate Chemical compound C1=C(N)C=C2C(CC(N)C(O)=O)=CNC2=C1 YNJSNEKCXVFDKW-UHFFFAOYSA-N 0.000 description 1
WBOQHFMXKCEWSQ-UHFFFAOYSA-N 4-hydroperoxy-4-oxobutanoic acid Chemical compound OOC(=O)CCC(O)=O WBOQHFMXKCEWSQ-UHFFFAOYSA-N 0.000 description 1
VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 1
101710121765 Endo-1,4-beta-xylanase Proteins 0.000 description 1
244000166124 Eucalyptus globulus Species 0.000 description 1
FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical class [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
235000005018 Pinus echinata Nutrition 0.000 description 1
241001236219 Pinus echinata Species 0.000 description 1
235000017339 Pinus palustris Nutrition 0.000 description 1
ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
OPMKAKQNACVKTE-XNIJJKJLSA-N [[(2r,3s,4r,5r)-5-(6-aminopurin-9-yl)-3,4-dihydroxyoxolan-2-yl]methoxy-hydroxyphosphoryl] (4-azidophenyl) hydrogen phosphate Chemical compound C([C@H]1O[C@H]([C@@H]([C@@H]1O)O)N1C=2N=CN=C(C=2N=C1)N)OP(O)(=O)OP(O)(=O)OC1=CC=C(N=[N+]=[N-])C=C1 OPMKAKQNACVKTE-XNIJJKJLSA-N 0.000 description 1
PQLVXDKIJBQVDF-UHFFFAOYSA-N acetic acid;hydrate Chemical compound O.CC(O)=O PQLVXDKIJBQVDF-UHFFFAOYSA-N 0.000 description 1
235000019401 acetone peroxide Nutrition 0.000 description 1
239000012190 activator Substances 0.000 description 1
230000000996 additive effect Effects 0.000 description 1
150000003863 ammonium salts Chemical class 0.000 description 1
239000007864 aqueous solution Substances 0.000 description 1
230000033228 biological regulation Effects 0.000 description 1
239000007844 bleaching agent Substances 0.000 description 1
239000002738 chelating agent Substances 0.000 description 1
239000007809 chemical reaction catalyst Substances 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
230000000593 degrading effect Effects 0.000 description 1
230000007613 environmental effect Effects 0.000 description 1
239000000284 extract Substances 0.000 description 1
239000007789 gas Substances 0.000 description 1
150000004820 halides Chemical class 0.000 description 1
230000000640 hydroxylating effect Effects 0.000 description 1
230000006872 improvement Effects 0.000 description 1
238000011065 in-situ storage Methods 0.000 description 1
238000010348 incorporation Methods 0.000 description 1
150000002500 ions Chemical class 0.000 description 1
239000011777 magnesium Substances 0.000 description 1
229910052749 magnesium Inorganic materials 0.000 description 1
WRUGWIBCXHJTDG-UHFFFAOYSA-L magnesium sulfate heptahydrate Chemical compound O.O.O.O.O.O.O.[Mg+2].[O-]S([O-])(=O)=O WRUGWIBCXHJTDG-UHFFFAOYSA-L 0.000 description 1
229940061634 magnesium sulfate heptahydrate Drugs 0.000 description 1
238000004519 manufacturing process Methods 0.000 description 1
239000000463 material Substances 0.000 description 1
235000010755 mineral Nutrition 0.000 description 1
230000009935 nitrosation Effects 0.000 description 1
238000007034 nitrosation reaction Methods 0.000 description 1
230000001590 oxidative effect Effects 0.000 description 1
FHHJDRFHHWUPDG-UHFFFAOYSA-L peroxysulfate(2-) Chemical compound [O-]OS([O-])(=O)=O FHHJDRFHHWUPDG-UHFFFAOYSA-L 0.000 description 1
230000000704 physical effect Effects 0.000 description 1
239000011591 potassium Substances 0.000 description 1
229910052700 potassium Inorganic materials 0.000 description 1
239000004302 potassium sorbate Substances 0.000 description 1
CZPZWMPYEINMCF-UHFFFAOYSA-N propaneperoxoic acid Chemical compound CCC(=O)OO CZPZWMPYEINMCF-UHFFFAOYSA-N 0.000 description 1
230000001012 protector Effects 0.000 description 1
FQENQNTWSFEDLI-UHFFFAOYSA-J sodium diphosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])([O-])=O FQENQNTWSFEDLI-UHFFFAOYSA-J 0.000 description 1
235000010288 sodium nitrite Nutrition 0.000 description 1
229940048086 sodium pyrophosphate Drugs 0.000 description 1
230000003381 solubilizing effect Effects 0.000 description 1
239000000126 substance Substances 0.000 description 1
235000019818 tetrasodium diphosphate Nutrition 0.000 description 1
239000001577 tetrasodium phosphonato phosphate Substances 0.000 description 1
231100000331 toxic Toxicity 0.000 description 1
230000002588 toxic effect Effects 0.000 description 1
230000007704 transition Effects 0.000 description 1
229910052723 transition metal Inorganic materials 0.000 description 1
150000003624 transition metals Chemical class 0.000 description 1
239000002023 wood 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
- D21C9/10—Bleaching ; Apparatus therefor
- 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
- D21C9/166—Bleaching ; Apparatus therefor with per compounds with peracids

Landscapes

Life Sciences & Earth Sciences (AREA)
Engineering & Computer Science (AREA)
Wood Science & Technology (AREA)
Paper (AREA)

CA 2224713 1996-04-12 1997-04-11 Procede de delignification a l'oxygene d'une pate a papier Abandoned CA2224713A1 (fr)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
FR96/04627		1996-04-12
FR9604627A FR2747406B1 (fr)	1996-04-12	1996-04-12	Procede de delignification a l'oxygene d'une pate a papier

Publications (1)

Publication Number	Publication Date
CA2224713A1 true CA2224713A1 (fr)	1997-10-23

Family

ID=9491170

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
CA 2224713 Abandoned CA2224713A1 (fr)	1996-04-12	1997-04-11	Procede de delignification a l'oxygene d'une pate a papier

Country Status (8)

Country	Link
EP (1)	EP0832322A1 (id)
JP (1)	JPH11508001A (id)
AU (1)	AU711672B2 (id)
BR (1)	BR9702127A (id)
CA (1)	CA2224713A1 (id)
FR (1)	FR2747406B1 (id)
ID (1)	ID16579A (id)
WO (1)	WO1997039180A1 (id)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US6899790B2 (en)	2000-03-06	2005-05-31	Georgia-Pacific Corporation	Method of providing papermaking fibers with durable curl
US6627041B2 (en) *	2000-03-06	2003-09-30	Georgia-Pacific Corporation	Method of bleaching and providing papermaking fibers with durable curl

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US5091054A (en) *	1989-08-18	1992-02-25	Degussa Corporation	Process for bleaching and delignification of lignocellulosic
BE1006057A3 (fr) *	1992-07-06	1994-05-03	Solvay Interox	Procede pour la delignification d'une pate a papier chimique.

1996
- 1996-04-12 FR FR9604627A patent/FR2747406B1/fr not_active Expired - Fee Related
1997
- 1997-04-11 CA CA 2224713 patent/CA2224713A1/fr not_active Abandoned
- 1997-04-11 WO PCT/FR1997/000647 patent/WO1997039180A1/fr not_active Ceased
- 1997-04-11 BR BR9702127A patent/BR9702127A/pt not_active Application Discontinuation
- 1997-04-11 AU AU26415/97A patent/AU711672B2/en not_active Ceased
- 1997-04-11 JP JP9536800A patent/JPH11508001A/ja active Pending
- 1997-04-11 EP EP97918207A patent/EP0832322A1/fr not_active Withdrawn
- 1997-04-14 ID IDP971227A patent/ID16579A/id unknown

Also Published As

Publication number	Publication date
AU2641597A (en)	1997-11-07
FR2747406A1 (fr)	1997-10-17
EP0832322A1 (fr)	1998-04-01
JPH11508001A (ja)	1999-07-13
ID16579A (id)	1997-10-16
BR9702127A (pt)	1999-01-05
WO1997039180A1 (fr)	1997-10-23
FR2747406B1 (fr)	1998-08-28
AU711672B2 (en)	1999-10-21

Legal Events

Date	Code	Title	Description
2003-04-11	FZDE	Dead

Publication	Publication Date	Title
FI98536C (fi)	1997-07-10	Menetelmä lignoselluloosamateriaalien valkaisemiseksi ja delignifioimiseksi
EP0578305B1 (fr)	1998-03-04	Procédé pour la délignification d'une pâte à papier chimique
CA2315063C (en)	2008-11-18	Bleaching of chemical pulp with peracid
EP0578304B1 (fr)	1996-09-18	Procédé pour le blanchiment d'une pâte à papier chimique
FI118571B (fi)	2007-12-31	Menetelmä lignoselluloosaa sisältävän massan delignifioimiseksi
CA2117984A1 (fr)	1995-04-23	Procede pour le blanchiment d'une pate a papier chimique
CA2265566A1 (fr)	1998-03-19	Procede de blanchiment de pate a papier
AU2003216028B2 (en)	2006-03-16	Process for bleaching lignocellulose-containing non-wood pulp
CA2224713A1 (fr)	1997-10-23	Procede de delignification a l'oxygene d'une pate a papier
CA2094268A1 (fr)	1992-04-18	Procede pour la preservation des caracteristiques de resistance mecanique des pates a papier chimiques
EP3571347B1 (fr)	2020-10-28	Procede de blanchiment d'une pate a papier
FI118572B (fi)	2007-12-31	Menetelmä lignoselluloosaa sisältävän massan valkaisemiseksi
US10006168B2 (en)	2018-06-26	Method for treating chemical pulps by treatment with ozone in the presence of magnesium ions
FI75374B (fi)	1988-02-29	Hypokloritbehandling av kemiska pappersmassor.
FR2692917A1 (fr)	1993-12-31	Procédé de blanchiment d'une pâte papetière chimique.
BE1006881A3 (fr)	1995-01-17	Procede pour la delignification d'une pate a papier chimique.
EP0844328A2 (fr)	1998-05-27	Procédé pour l'amélioration de la sélectivité de la délignification d'une pâte à papier chimique
BE1012675A6 (fr)	2001-02-06	Procede de blanchiment de pate a papier.
CA1128260A (fr)	1982-07-27	Procede de fabrication de pates papetieres chimiques
EP0728238B2 (fr)	2004-08-11	Procede pour le blanchiment d'une pate a papier chimique
Millar et al.	2003	Modification of a mill DEopDD sequence: Improvement in the D stage for combination of ozone (Z) and chlorine dioxide (D) on the (ZD) EopDD sequence of softwood kraft-oxygen pulp
FR2568605A1 (fr)	1986-02-07	Perfectionnements a la delignification de pate a papier.
EP0726979A1 (fr)	1996-08-21	Procede pour le blanchiment d'une pate a papier chimique
Leporini Filho et al.	0	HYDROGEN PEROXIDE IN CHEMICAL PULP BLEACHING
WO1998016683A1 (fr)	1998-04-23	Procede de delignification et de blanchiment de pate a papier chimique