CA2067296C - Process for bleaching of lignocellulose-containing pulp - Google Patents

Process for bleaching of lignocellulose-containing pulp

Info

Publication number: CA2067296C
Authority: CA; Canada
Prior art keywords: pulp; process according; magnesium; bleaching; compound
Prior art date: 1991-04-30
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 - Fee Related

Application number

CA002067296A

Other languages

English (en)

French (fr)

Other versions

CA2067296A1 (en

Inventor

Lennart Andersson

Jiri Basta

Lillemor Holtinger

Jan Hook

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.)

Nouryon Pulp and Performance Chemicals AB

Original Assignee

Eka Nobel AB

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.)

1991-04-30

Filing date

1992-04-27

Publication date

1997-03-04

Family has litigation

First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=20382601&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA2067296(C) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.

1992-04-27 Application filed by Eka Nobel AB filed Critical Eka Nobel AB

1992-04-27 Priority to CA002139246A priority Critical patent/CA2139246A1/en

1992-10-31 Publication of CA2067296A1 publication Critical patent/CA2067296A1/en

1997-03-04 Application granted granted Critical

1997-03-04 Publication of CA2067296C publication Critical patent/CA2067296C/en

2012-04-27 Anticipated expiration legal-status Critical

Status Expired - Fee Related legal-status Critical Current

Links

238000000034 method Methods 0.000 title claims abstract description 52
238000004061 bleaching Methods 0.000 title claims abstract description 37
239000007844 bleaching agent Substances 0.000 claims abstract description 37
238000011282 treatment Methods 0.000 claims abstract description 25
150000001875 compounds Chemical class 0.000 claims abstract description 22
239000000203 mixture Substances 0.000 claims abstract description 18
CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 16
239000002253 acid Substances 0.000 claims abstract description 13
QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 12
239000001301 oxygen Substances 0.000 claims abstract description 12
229910052760 oxygen Inorganic materials 0.000 claims abstract description 12
MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 104
239000011777 magnesium Substances 0.000 claims description 45
FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 33
229910052749 magnesium Inorganic materials 0.000 claims description 33
238000010306 acid treatment Methods 0.000 claims description 29
CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 claims description 22
150000002978 peroxides Chemical class 0.000 claims description 13
229940043430 calcium compound Drugs 0.000 claims description 12
150000001674 calcium compounds Chemical class 0.000 claims description 12
OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 claims description 12
150000002681 magnesium compounds Chemical class 0.000 claims description 12
239000000126 substance Substances 0.000 claims description 12
229910052943 magnesium sulfate Inorganic materials 0.000 claims description 11
235000019341 magnesium sulphate Nutrition 0.000 claims description 11
KFSLWBXXFJQRDL-UHFFFAOYSA-N Peracetic acid Chemical compound CC(=O)OO KFSLWBXXFJQRDL-UHFFFAOYSA-N 0.000 claims description 10
QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 9
229910021653 sulphate ion Inorganic materials 0.000 claims description 9
TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 claims description 8
OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 7
239000011575 calcium Substances 0.000 claims description 7
229910052791 calcium Inorganic materials 0.000 claims description 7
239000004155 Chlorine dioxide Substances 0.000 claims description 6
235000019398 chlorine dioxide Nutrition 0.000 claims description 6
229910001629 magnesium chloride Inorganic materials 0.000 claims description 4
UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 2
239000001110 calcium chloride Substances 0.000 claims description 2
229910001628 calcium chloride Inorganic materials 0.000 claims description 2
BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 2
239000000292 calcium oxide Substances 0.000 claims description 2
ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 2
235000001055 magnesium Nutrition 0.000 claims 9
229940091250 magnesium supplement Drugs 0.000 claims 9
229910052784 alkaline earth metal Inorganic materials 0.000 abstract description 21
150000001342 alkaline earth metals Chemical class 0.000 abstract description 21
239000001913 cellulose Substances 0.000 abstract description 6
229920002678 cellulose Polymers 0.000 abstract description 5
230000015572 biosynthetic process Effects 0.000 abstract description 4
-1 peroxide compounds Chemical class 0.000 abstract description 4
JVBXVOWTABLYPX-UHFFFAOYSA-L sodium dithionite Chemical compound [Na+].[Na+].[O-]S(=O)S([O-])=O JVBXVOWTABLYPX-UHFFFAOYSA-L 0.000 abstract description 2
229960002163 hydrogen peroxide Drugs 0.000 description 44
QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 9
238000012360 testing method Methods 0.000 description 9
239000001117 sulphuric acid Substances 0.000 description 7
235000011149 sulphuric acid Nutrition 0.000 description 7
239000007864 aqueous solution Substances 0.000 description 6
150000002500 ions Chemical class 0.000 description 6
229910021645 metal ion Inorganic materials 0.000 description 6
239000011122 softwood Substances 0.000 description 6
XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
229920005610 lignin Polymers 0.000 description 5
229910052751 metal Inorganic materials 0.000 description 5
239000002184 metal Substances 0.000 description 5
238000010561 standard procedure Methods 0.000 description 5
ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 4
229920001131 Pulp (paper) Polymers 0.000 description 4
229910001420 alkaline earth metal ion Inorganic materials 0.000 description 4
235000001465 calcium Nutrition 0.000 description 4
229960005069 calcium Drugs 0.000 description 4
235000010980 cellulose Nutrition 0.000 description 4
239000000460 chlorine Substances 0.000 description 4
229910052801 chlorine Inorganic materials 0.000 description 4
238000005406 washing Methods 0.000 description 4
JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-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
HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
230000002378 acidificating effect Effects 0.000 description 3
239000011121 hardwood Substances 0.000 description 3
VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 3
239000000347 magnesium hydroxide Substances 0.000 description 3
229910001862 magnesium hydroxide Inorganic materials 0.000 description 3
229910001425 magnesium ion Inorganic materials 0.000 description 3
238000004519 manufacturing process Methods 0.000 description 3
150000002739 metals Chemical class 0.000 description 3
239000000243 solution Substances 0.000 description 3
VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 2
UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
239000003513 alkali Substances 0.000 description 2
230000000052 comparative effect Effects 0.000 description 2
238000009792 diffusion process Methods 0.000 description 2
238000000605 extraction Methods 0.000 description 2
WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Chemical compound Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 description 2
229910017604 nitric acid Inorganic materials 0.000 description 2
239000002002 slurry Substances 0.000 description 2
LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 2
238000004448 titration Methods 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 1
150000007513 acids Chemical class 0.000 description 1
239000002585 base Substances 0.000 description 1
230000009286 beneficial effect Effects 0.000 description 1
230000015556 catabolic process Effects 0.000 description 1
229940106135 cellulose Drugs 0.000 description 1
230000002301 combined effect Effects 0.000 description 1
229910052802 copper Inorganic materials 0.000 description 1
238000006731 degradation reaction Methods 0.000 description 1
230000001627 detrimental effect Effects 0.000 description 1
230000029087 digestion Effects 0.000 description 1
230000000694 effects Effects 0.000 description 1
230000007613 environmental effect Effects 0.000 description 1
238000013100 final test Methods 0.000 description 1
239000001257 hydrogen Substances 0.000 description 1
229910052739 hydrogen Inorganic materials 0.000 description 1
125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
239000007788 liquid Substances 0.000 description 1
235000011147 magnesium chloride Nutrition 0.000 description 1
150000007522 mineralic acids Chemical class 0.000 description 1
238000012986 modification Methods 0.000 description 1
230000004048 modification Effects 0.000 description 1
238000010979 pH adjustment Methods 0.000 description 1
229940038597 peroxide anti-acne preparations for topical use Drugs 0.000 description 1
239000002244 precipitate Substances 0.000 description 1
238000004321 preservation Methods 0.000 description 1
239000000047 product Substances 0.000 description 1
229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
235000017557 sodium bicarbonate Nutrition 0.000 description 1
229910000029 sodium carbonate Inorganic materials 0.000 description 1
PFUVRDFDKPNGAV-UHFFFAOYSA-N sodium peroxide Chemical compound [Na+].[Na+].[O-][O-] PFUVRDFDKPNGAV-UHFFFAOYSA-N 0.000 description 1
239000000725 suspension Substances 0.000 description 1
229910021654 trace metal Inorganic materials 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
- D21C9/1005—Pretreatment of the pulp, e.g. degassing the pulp
- 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
- 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
- D21C9/153—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications with ozone

Landscapes

Life Sciences & Earth Sciences (AREA)
Engineering & Computer Science (AREA)
Wood Science & Technology (AREA)
Paper (AREA)
Polysaccharides And Polysaccharide Derivatives (AREA)
Compositions Of Macromolecular Compounds (AREA)
Processes Of Treating Macromolecular Substances (AREA)
Noodles (AREA)
Materials For Medical Uses (AREA)
Breeding Of Plants And Reproduction By Means Of Culturing (AREA)
Investigating Or Analysing Biological Materials (AREA)

CA002067296A 1991-04-30 1992-04-27 Process for bleaching of lignocellulose-containing pulp Expired - Fee Related CA2067296C (en)

Priority Applications (1)

Application Number	Priority Date	Filing Date	Title
CA002139246A CA2139246A1 (en)	1991-04-30	1992-04-27	Process for bleaching of lignocellulose-containing pulp

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
SE9101301-1		1991-04-30
SE9101301A SE470065C (sv)	1991-04-30	1991-04-30	Behandling av kemisk massa med en syra och därefter en magnesium- och kalciumförening vid klorfri blekning

Related Child Applications (1)

Application Number	Title	Priority Date	Filing Date
CA002139246A Division CA2139246A1 (en)	1991-04-30	1992-04-27	Process for bleaching of lignocellulose-containing pulp

Publications (2)

Publication Number	Publication Date
CA2067296A1 CA2067296A1 (en)	1992-10-31
CA2067296C true CA2067296C (en)	1997-03-04

Family

ID=20382601

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
CA002067296A Expired - Fee Related CA2067296C (en)	1991-04-30	1992-04-27	Process for bleaching of lignocellulose-containing pulp

Country Status (14)

Country	Link
EP (2)	EP0679760B1 (de)
JP (1)	JP2592747B2 (de)
AT (2)	ATE141971T1 (de)
BR (1)	BR9201554A (de)
CA (1)	CA2067296C (de)
DE (2)	DE69213080D1 (de)
ES (1)	ES2091395T3 (de)
FI (1)	FI111964B (de)
MX (1)	MX9201966A (de)
NO (1)	NO180495C (de)
NZ (1)	NZ242465A (de)
RU (1)	RU2039141C1 (de)
SE (1)	SE470065C (de)
ZA (1)	ZA923073B (de)

Families Citing this family (37)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FI89516B (fi)	1989-05-10	1993-06-30	Ahlstroem Oy	Foerfarande foer blekning av cellulosamassa med otson
US6398908B1 (en)	1991-04-30	2002-06-04	Eka Nobel Ab	Process for acid bleaching of lignocellulose-containing pulp with a magnesium compound
SE500353C2 (sv) *	1992-10-26	1994-06-06	Sca Wifsta Oestrand Ab	Peroxidblekning av sulfatmassa med tillsats av magnesium före blekningen
SE512137C2 (sv) *	1992-10-29	2000-01-31	Eka Chemicals Ab	Förfarande för blekning av lignocellulosahaltig massa
SE9203366L (sv) *	1992-11-11	1994-05-12	Mo Och Domsjoe Ab	Förfarande vid delignifiering och/eller blekning av cellulosamassa
US6007678A (en) *	1992-11-27	1999-12-28	Eka Nobel Ab	Process for delignification of lignocellulose-containing pulp with an organic peracid or salts thereof
DE69420306T2 (de) *	1993-04-20	2000-04-20	Eka Chemicals Ab	Verfahren zum Bleichen von Lignozellulose-enthaltendem Zellstoff
SE9301960L (sv) *	1993-06-08	1994-07-25	Kvaerner Pulping Tech	Blekning av kemisk massa med peroxid vid övertryck
US6605181B1 (en) *	1993-10-01	2003-08-12	Kvaerner Pulping Aktiebolag	Peroxide bleach sequence including an acidic bleach stage and including a wash stage
BE1007757A3 (fr) *	1993-11-10	1995-10-17	Solvay Interox	Procede pour le blanchiment d'une pate a papier chimique.
FI102301B1 (fi) *	1994-10-13	1998-11-13	Ahlstrom Machinery Oy	Menetelmä selluloosamassojen käsittelemiseksi
US6776876B1 (en)	1994-10-13	2004-08-17	Andritz Oy	Method of treating cellulosic pulp to remove hexenuronic acid
DE19516151A1 (de) *	1995-05-03	1996-11-07	Sven Siegle	Verfahren zur Herstellung einer Pulpe aus zellulosehaltigem Material, die Pulpe selbst und deren Verwendung
FI105701B (fi)	1995-10-20	2000-09-29	Ahlstrom Machinery Oy	Menetelmä ja laitteisto massan käsittelemiseksi
JPH108092A (ja) *	1996-06-21	1998-01-13	Mitsubishi Paper Mills Ltd	過酸化物漂白用安定化剤及びそれを用いた繊維系物質の漂白方法
BE1010679A3 (fr) *	1996-10-11	1998-11-03	Solvay Interox	Procede de delignification et de blanchiment de pate a papier chimique.
ID23571A (id) *	1997-08-25	2000-05-04	Praxair Technology Inc	Metoda penerapan ozon dalam pemutihan ecf
RU2164571C1 (ru) *	2000-06-27	2001-03-27	Камский целлюлозно-бумажный комбинат	Способ получения беленой сульфитной целлюлозы на магниевом основании
JP2002266272A (ja) *	2001-03-12	2002-09-18	Nippon Paper Industries Co Ltd	セルロース質繊維材料パルプの漂白方法
US6743332B2 (en) *	2001-05-16	2004-06-01	Weyerhaeuser Company	High temperature peroxide bleaching of mechanical pulps
KR100547491B1 (ko) *	2005-04-27	2006-01-31	이권혁	대나무를 이용하여 생산하는 섬유용 펄프의 제조방법 및 그 펄프
US9512563B2 (en)	2009-05-28	2016-12-06	Gp Cellulose Gmbh	Surface treated modified cellulose from chemical kraft fiber and methods of making and using same
US9511167B2 (en)	2009-05-28	2016-12-06	Gp Cellulose Gmbh	Modified cellulose from chemical kraft fiber and methods of making and using the same
US9512237B2 (en)	2009-05-28	2016-12-06	Gp Cellulose Gmbh	Method for inhibiting the growth of microbes with a modified cellulose fiber
ES2752755T3 (es)	2009-05-28	2020-04-06	Gp Cellulose Gmbh	Celulosa modificada de fibra química kraft y métodos de producción y uso de la misma
AU2012268700B2 (en)	2011-05-23	2017-02-02	Gp Cellulose Gmbh	Softwood kraft fiber having improved whiteness and brightness and methods of making and using the same
MX366988B (es)	2012-01-12	2019-08-01	Gp Cellulose Gmbh	Fibra kraft de baja viscosidad que tiene propiedades de amarillez reducida, y metodos para prepararla y usarla.
EP3495550A1 (de)	2012-04-18	2019-06-12	GP Cellulose GmbH	Verwendung eines tensids zur behandlung von pulpe und zur verbesserung der aufnahme von kraft-pulpe in fasern zur herstellung von viskose und anderen sekundären faserprodukten
JP6129323B2 (ja) *	2012-09-27	2017-05-17	アンドリッツインコーポレーテッド	リグノセルロース系繊維束材料の化学的処理並びにそれに関する方法及びシステム
MX365675B (es)	2013-02-08	2019-06-10	Gp Cellulose Gmbh	Fibra kraft de madera blanda que tiene un contenido mejorado de a-celulosa, y su uso en la produccion de productos de celulosa quimica.
EP2971334A2 (de)	2013-03-14	2016-01-20	GP Cellulose GmbH	Verfahren zur herstellung hochfunktioneller, niedrigviskoser kraftfasern mittels eines sauren bleichsequenz und nach diesem verfahren hergestellte faser
CA2901915A1 (en)	2013-03-15	2014-09-18	Gp Cellulose Gmbh	A low viscosity kraft fiber having an enhanced carboxyl content and methods of making and using the same
CA2989264A1 (en) *	2015-09-30	2017-04-06	Imerys Minerals Limited	Methods for bleaching aqueous pulps and compositions for use in these methods
WO2018093697A1 (en)	2016-11-16	2018-05-24	Gp Cellulose Gmbh	Modified cellulose from chemical fiber and methods of making and using the same
WO2021209586A1 (en) *	2020-04-16	2021-10-21	Bim Kemi Ab	Delignification process
SE544236C2 (en) *	2020-12-21	2022-03-08	Valmet Oy	Method for bleaching pulp from recycled textile material
WO2026017672A1 (en) *	2024-07-18	2026-01-22	Lenzing Aktiengesellschaft	Method for stabilizing of a bleaching stage for a polysaccharide material using an alkaline waste liquid

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Publication number	Priority date	Publication date	Assignee	Title
US3507744A (en) *	1966-04-01	1970-04-21	Kimberly Clark Co	Wood pulp bleaching process utilizing peroxide pyrophosphate high concentration compositions
SE335053B (de) *	1969-05-13	1971-05-10	Mo Och Domsjoe Ab
DE2742262C2 (de) *	1977-09-20	1982-06-09	Degussa Ag, 6000 Frankfurt	Verfahren zur Herstellung eines mittel- bis hochviskosen Nadelholz-Sulfitzellstoffs
FR2520397A1 (fr) *	1982-01-28	1983-07-29	Centre Tech Ind Papier	Procede pour le traitement de pates papetieres chimiques
FR2557605B1 (fr) *	1983-12-29	1987-12-11	Atochem	Procede de blanchiment de pates papetieres par le peroxyde d'hydrogene
JPH0364589A (ja) *	1989-07-28	1991-03-19	Mitsubishi Gas Chem Co Inc	化学パルプの漂白方法

1991
- 1991-04-30 SE SE9101301A patent/SE470065C/sv not_active IP Right Cessation
1992
- 1992-04-08 EP EP94203640A patent/EP0679760B1/de not_active Expired - Lifetime
- 1992-04-08 DE DE69213080T patent/DE69213080D1/de not_active Expired - Lifetime
- 1992-04-08 AT AT92201005T patent/ATE141971T1/de not_active IP Right Cessation
- 1992-04-08 DE DE69227640T patent/DE69227640T2/de not_active Expired - Fee Related
- 1992-04-08 ES ES92201005T patent/ES2091395T3/es not_active Expired - Lifetime
- 1992-04-08 AT AT94203640T patent/ATE173518T1/de not_active IP Right Cessation
- 1992-04-08 EP EP92201005A patent/EP0511695B2/de not_active Expired - Lifetime
- 1992-04-23 NZ NZ242465A patent/NZ242465A/en unknown
- 1992-04-27 CA CA002067296A patent/CA2067296C/en not_active Expired - Fee Related
- 1992-04-27 FI FI921886A patent/FI111964B/fi active
- 1992-04-28 JP JP4134325A patent/JP2592747B2/ja not_active Expired - Fee Related
- 1992-04-28 MX MX9201966A patent/MX9201966A/es unknown
- 1992-04-28 BR BR929201554A patent/BR9201554A/pt not_active IP Right Cessation
- 1992-04-28 ZA ZA923073A patent/ZA923073B/xx unknown
- 1992-04-29 NO NO19921671A patent/NO180495C/no not_active IP Right Cessation
- 1992-04-29 RU SU925011770A patent/RU2039141C1/ru not_active IP Right Cessation

Also Published As

Publication number	Publication date
NO180495C (no)	2003-06-06
EP0511695B2 (de)	2004-06-02
SE9101301D0 (sv)	1991-04-30
BR9201554A (pt)	1992-12-01
NO180495B (no)	1997-01-20
AU651192B2 (en)	1994-07-14
DE69227640D1 (de)	1998-12-24
ES2091395T3 (es)	1996-11-01
SE9101301L (sv)	1992-10-31
NZ242465A (en)	1993-12-23
DE69227640T2 (de)	1999-05-06
DE69213080D1 (de)	1996-10-02
ATE141971T1 (de)	1996-09-15
ATE173518T1 (de)	1998-12-15
EP0679760B1 (de)	1998-11-18
FI111964B (fi)	2003-10-15
EP0511695A1 (de)	1992-11-04
CA2067296A1 (en)	1992-10-31
NO921671L (no)	1992-11-02
ZA923073B (en)	1992-12-30
EP0511695B1 (de)	1996-08-28
SE470065C (sv)	1996-01-15
AU1514992A (en)	1993-03-11
RU2039141C1 (ru)	1995-07-09
FI921886A0 (fi)	1992-04-27
EP0679760A1 (de)	1995-11-02
FI921886L (fi)	1992-10-31
NO921671D0 (no)	1992-04-29
JPH05148784A (ja)	1993-06-15
SE470065B (sv)	1993-11-01
MX9201966A (es)	1992-11-01
JP2592747B2 (ja)	1997-03-19

Legal Events

Date	Code	Title	Description
1992-04-27	EEER	Examination request
2005-04-27	MKLA	Lapsed

Publication	Publication Date	Title
EP0679760B1 (de)	1998-11-18	Verfahren zum Bleichen von Lignocellulose-enthaltendem Zellstoff
CA2067295C (en)	1996-07-23	Process for bleaching of lignocellulose-containing material
US6398908B1 (en)	2002-06-04	Process for acid bleaching of lignocellulose-containing pulp with a magnesium compound
US5310458A (en)	1994-05-10	Process for bleaching lignocellulose-containing pulps
JP2864167B2 (ja)	1999-03-03	リグノセルロース含有パルプの脱リグニン化法
CA2121387C (en)	1998-06-30	Method for bleaching lignocellulose-containing pulp
EP0789798B1 (de)	1998-06-24	Verfahren zur delignifizierung und zum bleichen von chemischen zellstoff
CA1070909A (en)	1980-02-05	Nitrogen dioxide-oxygen delignification
USH1690H (en)	1997-11-04	Process for bleaching kraft pulp
JPH08503749A (ja)	1996-04-23	リグノセルロース含有パルプの漂白方法
RU2097462C1 (ru)	1997-11-27	Способ делигнификации и отбеливания лигноцеллюлозосодержащей пульпы
JP3697335B2 (ja)	2005-09-21	化学パルプの酸性漂白白水による処理方法
CA2139246A1 (en)	1992-10-31	Process for bleaching of lignocellulose-containing pulp
NZ250050A (en)	1994-12-22	Bleaching pulp; magnesium compound pretreatment in acid conditions
CA2245535A1 (en)	1999-02-25	Methods for applying ozone in ecf bleaching