NO321519B1 - Fremgangsmate for delignifisering og bleking av kjemiske papirmasser - Google Patents

Fremgangsmate for delignifisering og bleking av kjemiske papirmasser Download PDF

Info

Publication number: NO321519B1
Authority: NO; Norway
Prior art keywords: temperature; treatment; pulp; mass; hydrogen peroxide
Prior art date: 1996-04-12

Application number

NO19971407A

Other languages

English (en)

Norwegian (no)

Other versions

NO971407L (no

NO971407D0 (no

Inventor

Michel Devic

Original Assignee

Arkema

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

1997-03-25

Publication date

2006-05-15

1997-03-25 Application filed by Arkema filed Critical Arkema

1997-03-25 Publication of NO971407D0 publication Critical patent/NO971407D0/no

1997-10-13 Publication of NO971407L publication Critical patent/NO971407L/no

2006-05-15 Publication of NO321519B1 publication Critical patent/NO321519B1/no

Links

238000000034 method Methods 0.000 title claims description 26
238000004061 bleaching Methods 0.000 title claims description 13
229920001131 Pulp (paper) Polymers 0.000 title claims description 9
MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 58
238000011282 treatment Methods 0.000 claims description 31
HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 24
XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 24
CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 15
239000008139 complexing agent Substances 0.000 claims description 13
229920000642 polymer Polymers 0.000 claims description 13
229940126062 Compound A Drugs 0.000 claims description 9
NLDMNSXOCDLTTB-UHFFFAOYSA-N Heterophylliin A Natural products O1C2COC(=O)C3=CC(O)=C(O)C(O)=C3C3=C(O)C(O)=C(O)C=C3C(=O)OC2C(OC(=O)C=2C=C(O)C(O)=C(O)C=2)C(O)C1OC(=O)C1=CC(O)=C(O)C(O)=C1 NLDMNSXOCDLTTB-UHFFFAOYSA-N 0.000 claims description 9
KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 9
QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical group [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 9
239000001301 oxygen Substances 0.000 claims description 9
229910052760 oxygen Inorganic materials 0.000 claims description 9
239000003352 sequestering agent Substances 0.000 claims description 9
229910000029 sodium carbonate Inorganic materials 0.000 claims description 9
FEWFXBUNENSNBQ-UHFFFAOYSA-N 2-hydroxyacrylic acid Chemical compound OC(=C)C(O)=O FEWFXBUNENSNBQ-UHFFFAOYSA-N 0.000 claims description 8
229910052784 alkaline earth metal Inorganic materials 0.000 claims description 8
230000000536 complexating effect Effects 0.000 claims description 7
229910052783 alkali metal Inorganic materials 0.000 claims description 6
150000001340 alkali metals Chemical class 0.000 claims description 6
125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 6
QPCDCPDFJACHGM-UHFFFAOYSA-N N,N-bis{2-[bis(carboxymethyl)amino]ethyl}glycine Chemical group OC(=O)CN(CC(O)=O)CCN(CC(=O)O)CCN(CC(O)=O)CC(O)=O QPCDCPDFJACHGM-UHFFFAOYSA-N 0.000 claims description 5
239000000203 mixture Substances 0.000 claims description 5
-1 alkaline earth metal carbonates Chemical class 0.000 claims description 4
150000003839 salts Chemical class 0.000 claims description 4
229910052723 transition metal Inorganic materials 0.000 claims description 4
150000003624 transition metals Chemical class 0.000 claims description 4
238000005406 washing Methods 0.000 claims description 4
125000006273 (C1-C3) alkyl group Chemical group 0.000 claims description 3
150000001342 alkaline earth metals Chemical class 0.000 claims description 3
QGZKDVFQNNGYKY-UHFFFAOYSA-O ammonium group Chemical group [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 3
CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 2
150000004966 inorganic peroxy acids Chemical class 0.000 claims description 2
150000004967 organic peroxy acids Chemical class 0.000 claims description 2
239000003795 chemical substances by application Substances 0.000 claims 1
238000009835 boiling Methods 0.000 description 9
238000002203 pretreatment Methods 0.000 description 7
239000000123 paper Substances 0.000 description 6
239000011121 hardwood Substances 0.000 description 5
239000002655 kraft paper Substances 0.000 description 5
238000006116 polymerization reaction Methods 0.000 description 5
CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [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
239000003153 chemical reaction reagent Substances 0.000 description 4
OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 description 4
239000000126 substance Substances 0.000 description 4
239000004115 Sodium Silicate Substances 0.000 description 3
150000004649 carbonic acid derivatives Chemical class 0.000 description 3
230000015556 catabolic process Effects 0.000 description 3
238000006243 chemical reaction Methods 0.000 description 3
238000010411 cooking Methods 0.000 description 3
238000001704 evaporation Methods 0.000 description 3
230000008020 evaporation Effects 0.000 description 3
229910052911 sodium silicate Inorganic materials 0.000 description 3
239000011122 softwood Substances 0.000 description 3
IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 2
239000004155 Chlorine dioxide Substances 0.000 description 2
KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 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
FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 2
229910052910 alkali metal silicate Inorganic materials 0.000 description 2
229920002678 cellulose Polymers 0.000 description 2
239000001913 cellulose Substances 0.000 description 2
235000019398 chlorine dioxide Nutrition 0.000 description 2
238000010668 complexation reaction Methods 0.000 description 2
238000006731 degradation reaction Methods 0.000 description 2
229910052943 magnesium sulfate Inorganic materials 0.000 description 2
235000019341 magnesium sulphate Nutrition 0.000 description 2
229910052751 metal Inorganic materials 0.000 description 2
239000002184 metal Substances 0.000 description 2
150000002978 peroxides Chemical class 0.000 description 2
150000003009 phosphonic acids Chemical class 0.000 description 2
238000005086 pumping Methods 0.000 description 2
239000011541 reaction mixture Substances 0.000 description 2
NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 2
235000018185 Betula X alpestris Nutrition 0.000 description 1
235000018212 Betula X uliginosa Nutrition 0.000 description 1
LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
235000008733 Citrus aurantifolia Nutrition 0.000 description 1
244000166124 Eucalyptus globulus Species 0.000 description 1
240000000731 Fagus sylvatica Species 0.000 description 1
235000010099 Fagus sylvatica Nutrition 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
235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
241000018646 Pinus brutia Species 0.000 description 1
235000011613 Pinus brutia Nutrition 0.000 description 1
241000219000 Populus Species 0.000 description 1
235000011941 Tilia x europaea Nutrition 0.000 description 1
230000002378 acidificating effect Effects 0.000 description 1
239000003513 alkali Substances 0.000 description 1
239000002585 base Substances 0.000 description 1
230000009286 beneficial effect Effects 0.000 description 1
229910000019 calcium carbonate Inorganic materials 0.000 description 1
159000000007 calcium salts Chemical class 0.000 description 1
239000013043 chemical agent Substances 0.000 description 1
230000000052 comparative effect Effects 0.000 description 1
238000007872 degassing Methods 0.000 description 1
238000006073 displacement reaction Methods 0.000 description 1
239000007789 gas Substances 0.000 description 1
238000010438 heat treatment Methods 0.000 description 1
238000009897 hydrogen peroxide bleaching Methods 0.000 description 1
239000012978 lignocellulosic material Substances 0.000 description 1
239000004571 lime Substances 0.000 description 1
239000007788 liquid Substances 0.000 description 1
229910052749 magnesium Inorganic materials 0.000 description 1
239000011777 magnesium Substances 0.000 description 1
239000001095 magnesium carbonate Substances 0.000 description 1
229910000021 magnesium carbonate Inorganic materials 0.000 description 1
229910052748 manganese Inorganic materials 0.000 description 1
239000011572 manganese Substances 0.000 description 1
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 description 1
150000002739 metals Chemical class 0.000 description 1
229910052757 nitrogen Inorganic materials 0.000 description 1
LQPLDXQVILYOOL-UHFFFAOYSA-I pentasodium;2-[bis[2-[bis(carboxylatomethyl)amino]ethyl]amino]acetate Chemical compound [Na+].[Na+].[Na+].[Na+].[Na+].[O-]C(=O)CN(CC([O-])=O)CCN(CC(=O)[O-])CCN(CC([O-])=O)CC([O-])=O LQPLDXQVILYOOL-UHFFFAOYSA-I 0.000 description 1
229910052700 potassium Inorganic materials 0.000 description 1
239000011591 potassium Substances 0.000 description 1
BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 1
229910000027 potassium carbonate Inorganic materials 0.000 description 1
238000004076 pulp bleaching Methods 0.000 description 1
238000000746 purification Methods 0.000 description 1
230000000717 retained effect Effects 0.000 description 1
230000009919 sequestration Effects 0.000 description 1
229910052708 sodium Inorganic materials 0.000 description 1
239000011734 sodium Substances 0.000 description 1
239000003381 stabilizer Substances 0.000 description 1
230000000087 stabilizing effect Effects 0.000 description 1
229910001220 stainless steel Inorganic materials 0.000 description 1
239000010935 stainless steel Substances 0.000 description 1
LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 1
GLNXYFOBNHMQQH-UHFFFAOYSA-J tetrasodium;2-[[bis(carboxylatomethyl)amino]methyl-(carboxylatomethyl)amino]acetate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]C(=O)CN(CC([O-])=O)CN(CC([O-])=O)CC([O-])=O GLNXYFOBNHMQQH-UHFFFAOYSA-J 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
- 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)
Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)

NO19971407A 1996-04-12 1997-03-25 Fremgangsmate for delignifisering og bleking av kjemiske papirmasser NO321519B1 (no)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
FR9604611A FR2747407B1 (fr)	1996-04-12	1996-04-12	Procede de delignification et de blanchiment de pates a papier chimiques

Publications (3)

Publication Number	Publication Date
NO971407D0 NO971407D0 (no)	1997-03-25
NO971407L NO971407L (no)	1997-10-13
NO321519B1 true NO321519B1 (no)	2006-05-15

Family

ID=9491158

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
NO19971407A NO321519B1 (no)	1996-04-12	1997-03-25	Fremgangsmate for delignifisering og bleking av kjemiske papirmasser

Country Status (9)

Country	Link
US (1)	US6554958B1 (fr)
EP (1)	EP0801169B1 (fr)
JP (1)	JP3054378B2 (fr)
CN (1)	CN1085756C (fr)
CA (1)	CA2200486C (fr)
DE (1)	DE69705255T2 (fr)
ES (1)	ES2160300T3 (fr)
FR (1)	FR2747407B1 (fr)
NO (1)	NO321519B1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FI117393B (fi)	2003-01-10	2006-09-29	Kemira Oyj	Menetelmä selluloosakuitumateriaalin valkaisemiseksi
FI120202B (fi)	2003-01-10	2009-07-31	Kemira Oyj	Polymeerikoostumus ja sen käyttö
JP4595285B2 (ja) *	2003-02-28	2010-12-08	日本製紙株式会社	未晒クラフトパルプ処理方法および高白色度漂白パルプ製造方法
CA2678466A1 (fr) *	2007-02-21	2008-08-28	Solvay (Societe Anonyme)	Procede de blanchiment de pulpe de papier
EP2128331A1 (fr) *	2008-05-26	2009-12-02	SOLVAY (Société Anonyme)	Processus de blanchiment de pâte à papier
CN102002876A (zh) *	2010-09-17	2011-04-06	南开大学	一种草类原料无氯无硫清洁制浆方法
WO2013000074A1 (fr) *	2011-06-30	2013-01-03	Nano-Green Biorefineries Inc.	Conversion catalytique d'une biomasse
EP3408432A4 (fr)	2016-01-28	2019-10-02	Nano-Green Biorefineries Inc.	Production de cellulose cristalline
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

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
LU74434A1 (fr)	1976-02-25	1977-09-12
US4787959A (en) *	1977-07-29	1988-11-29	Atochem	Process for preparing chemical paper pulps by cooking, intermediate grinding and a final alkaline peroxide delignification
US5241026A (en)	1986-07-03	1993-08-31	Sandoz Ltd.	Polylactones of poly-α-hydroxyacrylic acid
DE3720806C2 (de)	1986-07-03	1997-08-21	Clariant Finance Bvi Ltd	Verwendung eines Stabilisators in Peroxydbleichverfahren
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
CA2063351C (fr) *	1992-03-18	1996-08-13	Stanley Alan Heimburger	Procede de blanchiment de pate de feuillus
SE9301960L (sv)	1993-06-08	1994-07-25	Kvaerner Pulping Tech	Blekning av kemisk massa med peroxid vid övertryck
SE501613C2 (sv)	1993-08-03	1995-03-27	Kvaerner Pulping Tech	Sätt vid integrering av blekning och återvinning vid framställning av massa
FR2719854B1 (fr) *	1994-05-11	1996-06-21	Atochem Elf Sa	Procédé de préparation de pâtes à papier chimiques délignifiées et blanchies.
FR2719853B1 (fr)	1994-05-11	1996-06-21	Atochem Elf Sa	Procédé de délignification et de blanchiment d'une pâte à papier chimique.

1996
- 1996-04-12 FR FR9604611A patent/FR2747407B1/fr not_active Expired - Fee Related
1997
- 1997-03-04 ES ES97400497T patent/ES2160300T3/es not_active Expired - Lifetime
- 1997-03-04 EP EP97400497A patent/EP0801169B1/fr not_active Expired - Lifetime
- 1997-03-04 DE DE69705255T patent/DE69705255T2/de not_active Expired - Lifetime
- 1997-03-19 CA CA002200486A patent/CA2200486C/fr not_active Expired - Fee Related
- 1997-03-25 NO NO19971407A patent/NO321519B1/no not_active IP Right Cessation
- 1997-04-08 CN CN97110338A patent/CN1085756C/zh not_active Expired - Fee Related
- 1997-04-10 JP JP9092391A patent/JP3054378B2/ja not_active Expired - Lifetime
- 1997-04-11 US US08/840,305 patent/US6554958B1/en not_active Expired - Fee Related

Also Published As

Publication number	Publication date
JP3054378B2 (ja)	2000-06-19
CN1085756C (zh)	2002-05-29
EP0801169B1 (fr)	2001-06-20
CA2200486A1 (fr)	1997-10-12
NO971407L (no)	1997-10-13
NO971407D0 (no)	1997-03-25
DE69705255D1 (de)	2001-07-26
FR2747407B1 (fr)	1998-05-07
US6554958B1 (en)	2003-04-29
FR2747407A1 (fr)	1997-10-17
JPH1025685A (ja)	1998-01-27
ES2160300T3 (es)	2001-11-01
CA2200486C (fr)	2002-01-15
EP0801169A1 (fr)	1997-10-15
DE69705255T2 (de)	2001-10-11
CN1167855A (zh)	1997-12-17

Publication	Publication Date	Title
CA1151363A (fr)	1983-08-09	Methode de defibrage de la pate chimique non blanchie
CA2651483C (fr)	2013-06-18	Procedes de pretraitement au carbonate et de reduction en pate de matiere cellulosique
NO321519B1 (no)	2006-05-15	Fremgangsmate for delignifisering og bleking av kjemiske papirmasser
US6019870A (en)	2000-02-01	Process for the preparation of delignified and bleached chemical paper pulps
NO143298B (no)	1980-10-06	Friserapparat.
FI83437B (fi)	1991-03-28	Sulfitkokfoerfarande foer framstaellning av cellulosa ur lignocellulosahaltiga material.
US3707437A (en)	1972-12-26	Pulping and bleaching of wood chips in a single stage with tertiary butyl hydroperoxide
US5698075A (en)	1997-12-16	Process for bleaching a chemical paper pulp in an oxygen-peroxymonosulfuric acid-hydrogen peroxide sequence
NO166098B (no)	1991-02-18	Hjoerneforbindelse.
US3462344A (en)	1969-08-19	Superbleaching of wood pulps
NO157224B (no)	1987-11-02	Fremgangsmaate for delignifisering av kjemisk cellulosemasse med oxygengass.
US5139613A (en)	1992-08-18	Process for preparing a paper pulp using carbon dioxide as an acidifying agent for a bleached pulp
NO149394B (no)	1984-01-02	Fremgangsmaate for aa fjerne opploest metallisk natrium fra aluminiumsmelter
US5645687A (en)	1997-07-08	Process for manufacturing bleached pulp with reduced chloride production
CA1080406A (fr)	1980-07-01	Procede de blanchiment de pate par hydrolyse faisant appel au chlore en quantites fortement reduites
NO300511B1 (no)	1997-06-09	Fremgangsmåte for delignifisering av cellulosemasse
JP2011001637A (ja)	2011-01-06	漂白パルプの製造方法
NO138491B (no)	1978-06-05	Fremgangsmaate ved delignifisering og bleking av cellulosemasse
US8980051B2 (en)	2015-03-17	Sulfonation of pulp produced by alkali pulping process
Hart	2019	Pulp bleaching
RU2075566C1 (ru)	1997-03-20	Способ отбелки сульфатной целлюлозы
NO176329B (no)	1994-12-05	Fremgangsmåte for klorfri bleking og delignifisering av kjemisk masse
NO153309B (no)	1985-11-11	Fremgangsmaate for oksygenbleking av kraftmasse.
NO158953B (no)	1988-08-08	Fremgangsmaate ved delignifisering av cellulosemasse.
JPH06507683A (ja)	1994-09-01	ケミカルペーパーパルプの漂白および脱リグニンのための方法およびクラフトパルプおよびａｓａｍパルプの漂白および脱リグニンのための本方法の使用

Legal Events

Date	Code	Title	Description
2012-10-22	MM1K	Lapsed by not paying the annual fees