NO300929B1 - Fremgangsmåte for bleking av lignocellulosematerialer - Google Patents

Fremgangsmåte for bleking av lignocellulosematerialer Download PDF

Info

Publication number: NO300929B1
Authority: NO; Norway
Prior art keywords: pulp; mass; ozone; delignification; consistency
Prior art date: 1990-05-17

Application number

NO920217A

Other languages

English (en)

Norwegian (no)

Other versions

NO920217D0 (no

NO920217L (no

Inventor

Bruce F Griggs

Thomas P Gandek

Michael A Pikulin

Allen Rosen

Original Assignee

Union Camp Corp

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.)

1990-05-17

Filing date

1992-01-16

Publication date

1997-08-18

Family has litigation

First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=22220868&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=NO300929(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.

1992-01-16 Application filed by Union Camp Corp filed Critical Union Camp Corp

1992-01-16 Publication of NO920217D0 publication Critical patent/NO920217D0/no

1992-03-05 Publication of NO920217L publication Critical patent/NO920217L/no

1997-08-18 Publication of NO300929B1 publication Critical patent/NO300929B1/no

Links

238000004061 bleaching Methods 0.000 title claims abstract description 132
238000000034 method Methods 0.000 title claims description 348
230000008569 process Effects 0.000 title claims description 141
239000012978 lignocellulosic material Substances 0.000 title claims description 25
238000005406 washing Methods 0.000 claims abstract description 73
239000002655 kraft paper Substances 0.000 claims abstract description 47
150000002978 peroxides Chemical class 0.000 claims abstract description 23
CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 231
QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 134
229910052760 oxygen Inorganic materials 0.000 claims description 134
239000001301 oxygen Substances 0.000 claims description 134
238000011282 treatment Methods 0.000 claims description 97
OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical group O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 claims description 86
239000000463 material Substances 0.000 claims description 71
229920005610 lignin Polymers 0.000 claims description 69
239000004155 Chlorine dioxide Substances 0.000 claims description 43
235000019398 chlorine dioxide Nutrition 0.000 claims description 43
239000012670 alkaline solution Substances 0.000 claims description 39
XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 36
229920002678 cellulose Polymers 0.000 claims description 33
239000001913 cellulose Substances 0.000 claims description 33
239000000126 substance Substances 0.000 claims description 33
239000000203 mixture Substances 0.000 claims description 32
ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 30
239000000460 chlorine Substances 0.000 claims description 30
229910052801 chlorine Inorganic materials 0.000 claims description 30
239000011121 hardwood Substances 0.000 claims description 30
238000000605 extraction Methods 0.000 claims description 27
239000002245 particle Substances 0.000 claims description 27
238000006243 chemical reaction Methods 0.000 claims description 26
230000002829 reductive effect Effects 0.000 claims description 25
230000009467 reduction Effects 0.000 claims description 24
230000008859 change Effects 0.000 claims description 23
238000004519 manufacturing process Methods 0.000 claims description 22
239000011122 softwood Substances 0.000 claims description 19
230000015556 catabolic process Effects 0.000 claims description 17
238000006731 degradation reaction Methods 0.000 claims description 16
241000218631 Coniferophyta Species 0.000 claims description 14
238000012545 processing Methods 0.000 claims description 14
239000002738 chelating agent Substances 0.000 claims description 12
238000002156 mixing Methods 0.000 claims description 11
MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical group OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 10
238000010411 cooking Methods 0.000 claims description 10
239000000706 filtrate Substances 0.000 claims description 10
MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 9
150000001805 chlorine compounds Chemical class 0.000 claims description 9
239000007788 liquid Substances 0.000 claims description 9
230000015572 biosynthetic process Effects 0.000 claims description 8
238000005282 brightening Methods 0.000 claims description 8
238000009835 boiling Methods 0.000 claims description 7
229910021645 metal ion Inorganic materials 0.000 claims description 7
230000002378 acidificating effect Effects 0.000 claims description 6
239000003795 chemical substances by application Substances 0.000 claims description 6
239000002699 waste material Substances 0.000 claims description 6
230000006378 damage Effects 0.000 claims description 5
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 4
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 4
239000002253 acid Substances 0.000 claims description 4
239000007864 aqueous solution Substances 0.000 claims description 4
MAYPHUUCLRDEAZ-UHFFFAOYSA-N chlorine peroxide Inorganic materials ClOOCl MAYPHUUCLRDEAZ-UHFFFAOYSA-N 0.000 claims description 3
235000006408 oxalic acid Nutrition 0.000 claims description 3
238000001223 reverse osmosis Methods 0.000 claims description 3
239000013505 freshwater Substances 0.000 claims description 2
239000008246 gaseous mixture Substances 0.000 claims description 2
238000009827 uniform distribution Methods 0.000 claims 5
238000002485 combustion reaction Methods 0.000 claims 1
238000004537 pulping Methods 0.000 abstract description 44
239000002023 wood Substances 0.000 abstract description 30
238000012216 screening Methods 0.000 abstract description 5
230000029087 digestion Effects 0.000 abstract description 3
HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 62
239000000835 fiber Substances 0.000 description 41
239000007789 gas Substances 0.000 description 27
239000007844 bleaching agent Substances 0.000 description 21
239000003513 alkali Substances 0.000 description 16
150000002926 oxygen Chemical class 0.000 description 14
239000000123 paper Substances 0.000 description 14
238000004064 recycling Methods 0.000 description 14
239000000243 solution Substances 0.000 description 13
230000008901 benefit Effects 0.000 description 10
239000003518 caustics Substances 0.000 description 10
239000000047 product Substances 0.000 description 9
VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 8
238000007792 addition Methods 0.000 description 8
230000007613 environmental effect Effects 0.000 description 8
238000002955 isolation Methods 0.000 description 8
238000010790 dilution Methods 0.000 description 7
239000012895 dilution Substances 0.000 description 7
229920001131 Pulp (paper) Polymers 0.000 description 5
150000001875 compounds Chemical class 0.000 description 5
230000000694 effects Effects 0.000 description 5
239000007791 liquid phase Substances 0.000 description 5
230000008719 thickening Effects 0.000 description 5
235000005018 Pinus echinata Nutrition 0.000 description 4
241001236219 Pinus echinata Species 0.000 description 4
235000017339 Pinus palustris Nutrition 0.000 description 4
235000008566 Pinus taeda Nutrition 0.000 description 4
241000218679 Pinus taeda Species 0.000 description 4
239000012159 carrier gas Substances 0.000 description 4
238000003776 cleavage reaction Methods 0.000 description 4
238000009826 distribution Methods 0.000 description 4
WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Chemical compound Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 description 4
229910052751 metal Inorganic materials 0.000 description 4
239000002184 metal Substances 0.000 description 4
238000012986 modification Methods 0.000 description 4
230000004048 modification Effects 0.000 description 4
230000007017 scission Effects 0.000 description 4
239000002002 slurry Substances 0.000 description 4
238000012360 testing method Methods 0.000 description 4
QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-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
230000002411 adverse Effects 0.000 description 3
PYKYMHQGRFAEBM-UHFFFAOYSA-N anthraquinone Natural products CCC(=O)c1c(O)c2C(=O)C3C(C=CC=C3O)C(=O)c2cc1CC(=O)OC PYKYMHQGRFAEBM-UHFFFAOYSA-N 0.000 description 3
150000004056 anthraquinones Chemical class 0.000 description 3
239000007795 chemical reaction product Substances 0.000 description 3
230000000052 comparative effect Effects 0.000 description 3
238000007796 conventional method Methods 0.000 description 3
230000001419 dependent effect Effects 0.000 description 3
238000002474 experimental method Methods 0.000 description 3
238000005259 measurement Methods 0.000 description 3
238000005374 membrane filtration Methods 0.000 description 3
230000003287 optical effect Effects 0.000 description 3
150000002894 organic compounds Chemical class 0.000 description 3
230000001590 oxidative effect Effects 0.000 description 3
230000000704 physical effect Effects 0.000 description 3
238000003825 pressing Methods 0.000 description 3
239000000376 reactant Substances 0.000 description 3
GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 description 3
239000007787 solid Substances 0.000 description 3
230000003068 static effect Effects 0.000 description 3
LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 3
244000166124 Eucalyptus globulus Species 0.000 description 2
235000008331 Pinus X rigitaeda Nutrition 0.000 description 2
235000011613 Pinus brutia Nutrition 0.000 description 2
241000018646 Pinus brutia Species 0.000 description 2
QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
230000000996 additive effect Effects 0.000 description 2
239000002585 base Substances 0.000 description 2
230000009286 beneficial effect Effects 0.000 description 2
239000006227 byproduct Substances 0.000 description 2
150000001720 carbohydrates Chemical class 0.000 description 2
238000005660 chlorination reaction Methods 0.000 description 2
230000001276 controlling effect Effects 0.000 description 2
230000002596 correlated effect Effects 0.000 description 2
230000000875 corresponding effect Effects 0.000 description 2
238000005260 corrosion Methods 0.000 description 2
230000007797 corrosion Effects 0.000 description 2
238000006073 displacement reaction Methods 0.000 description 2
238000004090 dissolution Methods 0.000 description 2
238000005516 engineering process Methods 0.000 description 2
238000001914 filtration Methods 0.000 description 2
238000000227 grinding Methods 0.000 description 2
239000003077 lignite Substances 0.000 description 2
150000002739 metals Chemical class 0.000 description 2
BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 2
238000006385 ozonation reaction Methods 0.000 description 2
239000012071 phase Substances 0.000 description 2
229920005646 polycarboxylate Polymers 0.000 description 2
239000003265 pulping liquor Substances 0.000 description 2
230000035484 reaction time Effects 0.000 description 2
238000002310 reflectometry Methods 0.000 description 2
230000004044 response Effects 0.000 description 2
150000003839 salts Chemical class 0.000 description 2
241000894007 species Species 0.000 description 2
238000010561 standard procedure Methods 0.000 description 2
239000007858 starting material Substances 0.000 description 2
238000012546 transfer Methods 0.000 description 2
OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 1
241001465754 Metazoa Species 0.000 description 1
241000183024 Populus tremula Species 0.000 description 1
QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
229920002522 Wood fibre Polymers 0.000 description 1
238000009825 accumulation Methods 0.000 description 1
239000012042 active reagent Substances 0.000 description 1
238000005054 agglomeration Methods 0.000 description 1
230000002776 aggregation Effects 0.000 description 1
150000001408 amides Chemical class 0.000 description 1
238000007664 blowing Methods 0.000 description 1
230000009920 chelation Effects 0.000 description 1
238000001311 chemical methods and process Methods 0.000 description 1
230000001427 coherent effect Effects 0.000 description 1
230000006835 compression Effects 0.000 description 1
238000007906 compression Methods 0.000 description 1
238000010276 construction Methods 0.000 description 1
239000004035 construction material Substances 0.000 description 1
239000000356 contaminant Substances 0.000 description 1
238000001816 cooling Methods 0.000 description 1
GOYYUYNOGNSLTE-UHFFFAOYSA-N copper;2-azanidylethylazanide Chemical compound [Cu+2].[NH-]CC[NH-].[NH-]CC[NH-] GOYYUYNOGNSLTE-UHFFFAOYSA-N 0.000 description 1
238000000354 decomposition reaction Methods 0.000 description 1
238000011161 development Methods 0.000 description 1
230000018109 developmental process Effects 0.000 description 1
238000010586 diagram Methods 0.000 description 1
238000009792 diffusion process Methods 0.000 description 1
239000005446 dissolved organic matter Substances 0.000 description 1
229960001484 edetic acid Drugs 0.000 description 1
238000004710 electron pair approximation Methods 0.000 description 1
230000008030 elimination Effects 0.000 description 1
238000003379 elimination reaction Methods 0.000 description 1
238000003912 environmental pollution Methods 0.000 description 1
239000002657 fibrous material Substances 0.000 description 1
239000012467 final product Substances 0.000 description 1
239000008394 flocculating agent Substances 0.000 description 1
244000144992 flock Species 0.000 description 1
235000019253 formic acid Nutrition 0.000 description 1
238000010438 heat treatment Methods 0.000 description 1
230000006872 improvement Effects 0.000 description 1
239000011261 inert gas Substances 0.000 description 1
238000002347 injection Methods 0.000 description 1
239000007924 injection Substances 0.000 description 1
229910001504 inorganic chloride Inorganic materials 0.000 description 1
238000009413 insulation Methods 0.000 description 1
150000002500 ions Chemical class 0.000 description 1
238000002386 leaching Methods 0.000 description 1
230000000670 limiting effect Effects 0.000 description 1
238000005457 optimization Methods 0.000 description 1
229960003330 pentetic acid Drugs 0.000 description 1
KFSLWBXXFJQRDL-UHFFFAOYSA-N peroxyacetic acid Substances CC(=O)OO KFSLWBXXFJQRDL-UHFFFAOYSA-N 0.000 description 1
238000011020 pilot scale process Methods 0.000 description 1
229920000642 polymer Polymers 0.000 description 1
238000006116 polymerization reaction Methods 0.000 description 1
230000008092 positive effect Effects 0.000 description 1
239000012286 potassium permanganate Substances 0.000 description 1
238000002203 pretreatment Methods 0.000 description 1
238000007639 printing Methods 0.000 description 1
ODLMAHJVESYWTB-UHFFFAOYSA-N propylbenzene Chemical group CCCC1=CC=CC=C1 ODLMAHJVESYWTB-UHFFFAOYSA-N 0.000 description 1
230000009257 reactivity Effects 0.000 description 1
230000008929 regeneration Effects 0.000 description 1
238000011069 regeneration method Methods 0.000 description 1
238000011160 research Methods 0.000 description 1
229920006395 saturated elastomer Polymers 0.000 description 1
238000000926 separation method Methods 0.000 description 1
239000010865 sewage Substances 0.000 description 1
238000007873 sieving Methods 0.000 description 1
229910052979 sodium sulfide Inorganic materials 0.000 description 1
238000005063 solubilization Methods 0.000 description 1
230000007928 solubilization Effects 0.000 description 1
239000002195 soluble material Substances 0.000 description 1
229910021653 sulphate ion Inorganic materials 0.000 description 1
239000000725 suspension Substances 0.000 description 1
239000002562 thickening agent Substances 0.000 description 1
231100000331 toxic Toxicity 0.000 description 1
230000002588 toxic effect Effects 0.000 description 1
239000002351 wastewater Substances 0.000 description 1
239000002025 wood fiber 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
- D21C9/1057—Multistage, with compounds cited in more than one sub-group D21C9/10, D21C9/12, D21C9/16
- 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
- D21C9/147—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)
Dry Formation Of Fiberboard And The Like (AREA)
Detergent Compositions (AREA)

NO920217A 1990-05-17 1992-01-16 Fremgangsmåte for bleking av lignocellulosematerialer NO300929B1 (no)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
PCT/US1990/002823 WO1991018145A1 (en)	1990-05-17	1990-05-17	Environmentally improved process for bleaching lignocellulosic materials

Publications (3)

Publication Number	Publication Date
NO920217D0 NO920217D0 (no)	1992-01-16
NO920217L NO920217L (no)	1992-03-05
NO300929B1 true NO300929B1 (no)	1997-08-18

Family

ID=22220868

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
NO920217A NO300929B1 (no)	1990-05-17	1992-01-16	Fremgangsmåte for bleking av lignocellulosematerialer

Country Status (16)

Country	Link
EP (1)	EP0483163B1 (pt)
JP (1)	JP2825346B2 (pt)
KR (1)	KR920703922A (pt)
CN (1)	CN1043798C (pt)
AT (1)	ATE122421T1 (pt)
AU (1)	AU638017B2 (pt)
BR (1)	BR9007533A (pt)
CA (1)	CA2063591C (pt)
DE (1)	DE69019350T2 (pt)
ES (1)	ES2073027T3 (pt)
NO (1)	NO300929B1 (pt)
PT (1)	PT98487B (pt)
RU (1)	RU2102547C1 (pt)
SE (1)	SE9200107L (pt)
WO (1)	WO1991018145A1 (pt)
ZA (1)	ZA915969B (pt)

Families Citing this family (32)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US5472572A (en) *	1990-10-26	1995-12-05	Union Camp Patent Holding, Inc.	Reactor for bleaching high consistency pulp with ozone
US5441603A (en) *	1990-05-17	1995-08-15	Union Camp Patent Holding, Inc.	Method for chelation of pulp prior to ozone delignification
US5328564A (en) *	1990-09-17	1994-07-12	Kamyr, Inc.	Modified digestion of paper pulp followed by ozone bleaching
WO1992012289A1 (en) *	1991-01-03	1992-07-23	Union Camp Patent Holding, Inc.	Chlorine-free process for bleaching lignocellulosic pulp
SE468355B (sv) *	1991-04-30	1992-12-21	Eka Nobel Ab	Blekning av kemisk massa genom behandling med komplexbildare och ozon
DE69221385T2 (de) *	1991-05-24	1997-12-11	Union Camp Patent Holding, Inc., Wilmington, Del.	Zweistufiger Reaktor zum Bleichen von Zellstoff und Verfahren zum Bleichen mit Ozon
US5364503A (en) *	1992-02-20	1994-11-15	Macmillan Bloedel Limited	Nitric oxide treatment for ozone bleaching
CA2089516A1 (en) *	1992-02-21	1993-08-22	Kaj Henricson	Chlorine free pulping and bleaching sequence
SE469387B (sv) *	1992-05-11	1993-06-28	Kamyr Ab	Saett vid blekning av massa utan anvaendning av klorkemikalier
EP0663030A4 (en) *	1992-10-01	1995-12-06	Union Camp Patent Holding	IMPROVED BLEACHING OF LIGNOCELLULOSE PULP OF A HIGH CONSISTENCY.
US5403441A (en) *	1992-11-13	1995-04-04	Union Camp Patent Holding, Inc.	Method for controlling an ozone bleaching process
SE501613C2 (sv) *	1993-08-03	1995-03-27	Kvaerner Pulping Tech	Sätt vid integrering av blekning och återvinning vid framställning av massa
JPH09502229A (ja) *	1993-09-02	1997-03-04	ユニオンキャンプパテントホールディングインコーポレイテッド	リグノセルロースパルプの改良漂白方法
EP0717800A4 (en) *	1993-09-03	1998-10-28	Union Camp Patent Holding	MEDIUM CONSISTENCY OZONE BLEACHING OF HIGH CONSISTENCY OZONE WHITE FIBER
US5810973A (en) *	1993-09-21	1998-09-22	Beloit Technologies, Inc.	Apparatus for producing small particles from high consistency wood pulp
SE502172C2 (sv) *	1993-12-15	1995-09-04	Mo Och Domsjoe Ab	Förfarande för framställning av blekt cellulosamassa med en klorfri bleksekvens i närvaro av karbonat
EP0831170A3 (en) *	1994-06-27	1998-11-11	Champion International Corporation	Improved process for recycling bleach plant filtrate
US5672247A (en) *	1995-03-03	1997-09-30	Union Camp Patent Holding, Inc.	Control scheme for rapid pulp delignification and bleaching
US5736004A (en) *	1995-03-03	1998-04-07	Union Camp Patent Holding, Inc.	Control scheme for rapid pulp delignification and bleaching
US5944952A (en) *	1995-07-26	1999-08-31	Beloit Technologies, Inc.	Method for bleaching high consistency pulp with a gaseous bleaching reagent
CN1050642C (zh) *	1996-06-25	2000-03-22	华南理工大学	高浓纸浆过氧化氢漂白方法
US6077396A (en) *	1997-05-16	2000-06-20	Lariviere; Christopher J.	Apparatus for fluffing and contacting high consistancy wood pulp with a gaseous bleaching reagent
ID23571A (id) *	1997-08-25	2000-05-04	Praxair Technology Inc	Metoda penerapan ozon dalam pemutihan ecf
FI121792B (fi) *	2003-06-30	2011-04-15	Andritz Oy	Menetelmä massan käsittelemiseksi kemiallisen massan valkaisun yhteydessä
US7914646B2 (en) *	2006-07-21	2011-03-29	Nalco Company	Compositions and processes for paper production
FR2910027B1 (fr) *	2006-12-13	2009-11-06	Itt Mfg Enterprises Inc	Procede de blanchiment des pates papeteries chimiques par traitement final a l'ozone a haute temperature
FI119062B (fi) *	2006-12-28	2008-07-15	Upm Kymmene Corp	Menetelmä mekaanisen massan valmistamiseksi
JP4973284B2 (ja) *	2007-03-30	2012-07-11	栗田工業株式会社	パルプ洗浄剤、パルプ製造方法、及びパルプ洗浄方法
US8497097B2 (en) *	2010-08-11	2013-07-30	Georgia Tech Research Corporation	Chlorine dioxide treatment of biomass feedstock
CN104313933A (zh) *	2014-09-23	2015-01-28	华南理工大学	一种硫酸盐蔗渣浆绿色漂白方法
CN115112831A (zh) *	2022-04-12	2022-09-27	中国制浆造纸研究院有限公司	一种测定莱赛尔纤维用浆粕溶解性能的方法及过滤装置
CN115584653B (zh) *	2022-12-12	2023-03-10	河南禾力能源有限公司	一种利用糠醛渣提取α-纤维素的方法

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CA632280A (en) *	1958-07-02	1961-12-05	Kimberly-Clark Corporation	Manufacture of bleached cellulosic products resistant to brightness reversion
FR1387853A (fr) *	1963-09-19	1965-02-05	Air Liquide	Délignification et blanchiment des pâtes cellulosiques chimiques et mi-chimiques
US4196043A (en) *	1970-12-21	1980-04-01	Scott Paper Company	Kraft pulp bleaching and recovery process
CA1090510A (en) *	1976-06-02	1980-12-02	Arthur W. Kempf	Delignification and bleaching of a lignocellulosic pulp slurry with ozone
JPS5390402A (en) *	1977-01-12	1978-08-09	Kogyo Gijutsuin	Pulp bleaching method
FI67413C (fi) *	1977-04-27	1985-03-11	Myrens Verksted As	Foerfarande foer behandling av finfoerdelad fiberhaltig eller cellulosahaltig massa samt anordning foer utfoerande av foerfarandet
US4216054A (en) *	1977-09-26	1980-08-05	Weyerhaeuser Company	Low-consistency ozone delignification
NO142091C (no) *	1977-10-17	1980-06-25	Myrens Verksted As	Fremgangsmaate ved ozonbehandling av raffinoermekanisk og termomekanisk masse.
JPS5679797A (en) *	1979-11-30	1981-06-30	Weyerhaeuser Co	Bleaching of cellulose fiber
US4619733A (en) *	1983-11-30	1986-10-28	Kooi Boon Lam	Pollution free pulping process using recycled wash effluent from multiple bleach stages to remove black liquor and recovering sodium hydroxide from the black liquor
US4806203A (en) *	1985-02-14	1989-02-21	Elton Edward F	Method for alkaline delignification of lignocellulosic fibrous material at a consistency which is raised during reaction
CA2015296C (en) *	1989-05-31	2001-08-07	Karnail Atwal	Pyranyl cyanoguanidine derivatives
CA2053035C (en) *	1990-10-12	1997-09-30	Repap Enterprises Inc.	Chlorine-free wood pulps and process of making

1990
- 1990-05-17 BR BR909007533A patent/BR9007533A/pt not_active IP Right Cessation
- 1990-05-17 DE DE69019350T patent/DE69019350T2/de not_active Expired - Fee Related
- 1990-05-17 RU SU5011189A patent/RU2102547C1/ru active
- 1990-05-17 JP JP2508269A patent/JP2825346B2/ja not_active Expired - Lifetime
- 1990-05-17 EP EP90908787A patent/EP0483163B1/en not_active Expired - Lifetime
- 1990-05-17 CA CA002063591A patent/CA2063591C/en not_active Expired - Lifetime
- 1990-05-17 ES ES90908787T patent/ES2073027T3/es not_active Expired - Lifetime
- 1990-05-17 AU AU56768/90A patent/AU638017B2/en not_active Ceased
- 1990-05-17 AT AT90908787T patent/ATE122421T1/de not_active IP Right Cessation
- 1990-05-17 KR KR1019920700104A patent/KR920703922A/ko not_active Abandoned
- 1990-05-17 WO PCT/US1990/002823 patent/WO1991018145A1/en not_active Ceased
1991
- 1991-07-29 PT PT98487A patent/PT98487B/pt not_active IP Right Cessation
- 1991-07-30 ZA ZA915969A patent/ZA915969B/xx unknown
- 1991-08-07 CN CN91108650A patent/CN1043798C/zh not_active Expired - Lifetime
1992
- 1992-01-15 SE SE9200107A patent/SE9200107L/xx not_active Application Discontinuation
- 1992-01-16 NO NO920217A patent/NO300929B1/no not_active IP Right Cessation

Also Published As

Publication number	Publication date
JPH05500243A (ja)	1993-01-21
EP0483163A4 (en)	1992-08-05
WO1991018145A1 (en)	1991-11-28
NO920217D0 (no)	1992-01-16
NO920217L (no)	1992-03-05
KR920703922A (ko)	1992-12-18
JP2825346B2 (ja)	1998-11-18
EP0483163B1 (en)	1995-05-10
EP0483163A1 (en)	1992-05-06
CN1043798C (zh)	1999-06-23
SE9200107L (en)	1992-03-13
CA2063591C (en)	1998-02-03
CA2063591A1 (en)	1991-11-18
ES2073027T3 (es)	1995-08-01
ZA915969B (en)	1992-04-29
AU638017B2 (en)	1993-06-17
DE69019350T2 (de)	1996-02-15
CN1069304A (zh)	1993-02-24
RU2102547C1 (ru)	1998-01-20
AU5676890A (en)	1991-12-10
PT98487A (pt)	1993-01-29
ATE122421T1 (de)	1995-05-15
DE69019350D1 (de)	1995-06-14
SE9200107D0 (sv)	1992-01-15
BR9007533A (pt)	1992-04-28
PT98487B (pt)	1998-06-30

Legal Events

Date	Code	Title	Description
2002-12-30	MM1K	Lapsed by not paying the annual fees	Free format text: LAPSED IN NOVEMBER 2002

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