NO300225B1 - Fremgangsmåte for fremstilling av bleket papirmasse i höyt utbytte - Google Patents
Fremgangsmåte for fremstilling av bleket papirmasse i höyt utbytte Download PDFInfo
- Publication number
- NO300225B1 NO300225B1 NO921335A NO921335A NO300225B1 NO 300225 B1 NO300225 B1 NO 300225B1 NO 921335 A NO921335 A NO 921335A NO 921335 A NO921335 A NO 921335A NO 300225 B1 NO300225 B1 NO 300225B1
- Authority
- NO
- Norway
- Prior art keywords
- solution
- hydrogen peroxide
- tile
- chip
- temperature
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 32
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims abstract description 46
- 239000002023 wood Substances 0.000 claims abstract description 24
- 238000004519 manufacturing process Methods 0.000 claims abstract description 11
- 229920001131 Pulp (paper) Polymers 0.000 claims abstract description 9
- 239000000243 solution Substances 0.000 claims description 100
- 230000001603 reducing effect Effects 0.000 claims description 38
- 238000011282 treatment Methods 0.000 claims description 27
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims description 24
- 239000012279 sodium borohydride Substances 0.000 claims description 17
- 229910000033 sodium borohydride Inorganic materials 0.000 claims description 17
- 235000010265 sodium sulphite Nutrition 0.000 claims description 13
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- 238000003825 pressing Methods 0.000 claims description 9
- 238000007670 refining Methods 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 8
- 229910021645 metal ion Inorganic materials 0.000 claims description 7
- 239000012670 alkaline solution Substances 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 238000005470 impregnation Methods 0.000 claims description 4
- 150000002978 peroxides Chemical class 0.000 claims description 3
- 239000003381 stabilizer Substances 0.000 claims description 3
- 230000000873 masking effect Effects 0.000 claims 1
- 238000000227 grinding Methods 0.000 abstract description 13
- 239000003638 chemical reducing agent Substances 0.000 abstract description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 27
- 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 19
- 238000002791 soaking Methods 0.000 description 16
- XQIMLPCOVYNASM-UHFFFAOYSA-N borole Chemical compound B1C=CC=C1 XQIMLPCOVYNASM-UHFFFAOYSA-N 0.000 description 10
- 230000001590 oxidative effect Effects 0.000 description 9
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 8
- 239000011121 hardwood Substances 0.000 description 8
- 238000004061 bleaching Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 241000219000 Populus Species 0.000 description 5
- -1 alkali metal sulfites Chemical class 0.000 description 5
- 229960003330 pentetic acid Drugs 0.000 description 5
- 159000000000 sodium salts Chemical class 0.000 description 5
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 5
- 241000218631 Coniferophyta Species 0.000 description 4
- 239000004115 Sodium Silicate Substances 0.000 description 4
- JVBXVOWTABLYPX-UHFFFAOYSA-L sodium dithionite Chemical compound [Na+].[Na+].[O-]S(=O)S([O-])=O JVBXVOWTABLYPX-UHFFFAOYSA-L 0.000 description 4
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 4
- 229910052911 sodium silicate Inorganic materials 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 102100031260 Acyl-coenzyme A thioesterase THEM4 Human genes 0.000 description 3
- 101000638510 Homo sapiens Acyl-coenzyme A thioesterase THEM4 Proteins 0.000 description 3
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 3
- 241000018646 Pinus brutia Species 0.000 description 3
- 235000011613 Pinus brutia Nutrition 0.000 description 3
- 229910052783 alkali metal Inorganic materials 0.000 description 3
- 230000000536 complexating effect Effects 0.000 description 3
- 239000008139 complexing agent Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000006386 neutralization reaction Methods 0.000 description 3
- 239000000376 reactant Substances 0.000 description 3
- 239000003352 sequestering agent Substances 0.000 description 3
- 239000011734 sodium Substances 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical class OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 2
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 2
- 241000218657 Picea Species 0.000 description 2
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- 150000001340 alkali metals Chemical class 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 239000012978 lignocellulosic material Substances 0.000 description 2
- YIXJRHPUWRPCBB-UHFFFAOYSA-N magnesium nitrate Chemical compound [Mg+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O YIXJRHPUWRPCBB-UHFFFAOYSA-N 0.000 description 2
- 159000000003 magnesium salts Chemical class 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 239000004289 sodium hydrogen sulphite Substances 0.000 description 2
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 230000000930 thermomechanical effect Effects 0.000 description 2
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 description 2
- NYYSPVRERVXMLJ-UHFFFAOYSA-N 4,4-difluorocyclohexan-1-one Chemical compound FC1(F)CCC(=O)CC1 NYYSPVRERVXMLJ-UHFFFAOYSA-N 0.000 description 1
- 241000609240 Ambelania acida Species 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 206010059027 Brugada syndrome Diseases 0.000 description 1
- 244000166124 Eucalyptus globulus Species 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 241000183024 Populus tremula Species 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Natural products NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000010905 bagasse Substances 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- SNXYIOIMZXSIDC-UHFFFAOYSA-A hexadecasodium;phosphonato phosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])([O-])=O.[O-]P([O-])(=O)OP([O-])([O-])=O.[O-]P([O-])(=O)OP([O-])([O-])=O.[O-]P([O-])(=O)OP([O-])([O-])=O SNXYIOIMZXSIDC-UHFFFAOYSA-A 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- YOBAEOGBNPPUQV-UHFFFAOYSA-N iron;trihydrate Chemical compound O.O.O.[Fe].[Fe] YOBAEOGBNPPUQV-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- 229910001629 magnesium chloride Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- MGFYIUFZLHCRTH-UHFFFAOYSA-N nitrilotriacetic acid Chemical class OC(=O)CN(CC(O)=O)CC(O)=O MGFYIUFZLHCRTH-UHFFFAOYSA-N 0.000 description 1
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 125000002081 peroxide group Chemical group 0.000 description 1
- 235000015320 potassium carbonate Nutrition 0.000 description 1
- 229910000027 potassium carbonate Inorganic materials 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 235000019832 sodium triphosphate Nutrition 0.000 description 1
- 239000011122 softwood Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc 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
- D21C9/1005—Pretreatment of the pulp, e.g. degassing the pulp
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/02—Pretreatment of the raw materials by chemical or physical means
- D21B1/021—Pretreatment of the raw materials by chemical or physical means by chemical means
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
- Combined Devices Of Dampers And Springs (AREA)
- Electroluminescent Light Sources (AREA)
- Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
- Ultra Sonic Daignosis Equipment (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9104737A FR2675518B1 (fr) | 1991-04-17 | 1991-04-17 | Procede de preparation de pate a papier a haut rendement et blanchie, a partir de copeaux de bois. |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| NO921335D0 NO921335D0 (no) | 1992-04-06 |
| NO921335L NO921335L (no) | 1992-10-19 |
| NO300225B1 true NO300225B1 (no) | 1997-04-28 |
Family
ID=9411959
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO921335A NO300225B1 (no) | 1991-04-17 | 1992-04-06 | Fremgangsmåte for fremstilling av bleket papirmasse i höyt utbytte |
Country Status (12)
| Country | Link |
|---|---|
| EP (1) | EP0509905B1 (fr) |
| JP (1) | JP2588495B2 (fr) |
| AT (1) | ATE140283T1 (fr) |
| AU (1) | AU650962B2 (fr) |
| CA (1) | CA2066316C (fr) |
| DE (1) | DE69212051T2 (fr) |
| ES (1) | ES2089436T3 (fr) |
| FI (1) | FI921671A (fr) |
| FR (1) | FR2675518B1 (fr) |
| IE (1) | IE75202B1 (fr) |
| NO (1) | NO300225B1 (fr) |
| NZ (1) | NZ242356A (fr) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024133473A1 (fr) * | 2022-12-21 | 2024-06-27 | Billerud Aktiebolag (Publ) | Préparation de bois d'érable pour la production de ctmp |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69912128T2 (de) * | 1998-04-17 | 2004-06-17 | Alberta Research Council, Inc., Edmonton | Verfahren zur herstellung lignocellulosehaltiger pulpe aus nicht holzartigem material |
| JP4738662B2 (ja) * | 2001-08-03 | 2011-08-03 | 日本製紙株式会社 | 新聞用紙 |
| JP4799774B2 (ja) * | 2001-08-03 | 2011-10-26 | 日本製紙株式会社 | 印刷用紙 |
| JP4501329B2 (ja) * | 2002-03-29 | 2010-07-14 | 日本製紙株式会社 | グラビア印刷用塗工紙 |
| JP2006123982A (ja) * | 2004-10-29 | 2006-05-18 | Kyoraku Co Ltd | 薄いパルプモールド製品 |
| CN100357517C (zh) * | 2005-10-14 | 2007-12-26 | 山东轻工业学院 | 棉杆蒸煮预处理液 |
| KR20110123184A (ko) | 2010-05-06 | 2011-11-14 | 바히아 스페셜티 셀룰로스 에스에이 | 높은 알파 용해 펄프 제조를 위한 방법 및 시스템 |
| CN103334328A (zh) * | 2013-06-17 | 2013-10-02 | 中国林业科学研究院林产化学工业研究所 | 利用桉木屑制漂白化机浆的方法 |
| CN103422380B (zh) * | 2013-08-15 | 2015-11-18 | 齐鲁工业大学 | 一种针叶木高得率制浆的方法 |
| EP2924166A1 (fr) * | 2014-03-25 | 2015-09-30 | Basf Se | Procédé de fabrication de fibre de bois blanchie |
| CN103978533B (zh) * | 2014-06-09 | 2016-04-06 | 山东轻工职业学院 | 一种拉菲草的漂白工艺 |
| CN109183495B (zh) * | 2018-09-26 | 2020-12-25 | 湖北夷盟包装材料有限公司 | 一种使用含铋材料的高透明度透明纸的制备方法 |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE416481B (sv) * | 1977-05-02 | 1981-01-05 | Mo Och Domsjoe Ab | Fofarande och anordning for behandling av vedflis for avlegsnande av tungmetaller och harts |
| JPS5917240B2 (ja) * | 1980-05-30 | 1984-04-20 | 三菱瓦斯化学株式会社 | 機械パルプの過酸化物標白法 |
| AU545847B2 (en) * | 1981-02-11 | 1985-08-01 | Mead Corporation, The | Production of chemimechanical pump |
| US4486267A (en) * | 1983-11-14 | 1984-12-04 | Mead Corporation | Chemithermomechanical pulping process employing separate alkali and sulfite treatments |
| US5002635A (en) * | 1985-09-20 | 1991-03-26 | Scott Paper Company | Method for producing pulp using pre-treatment with stabilizers and refining |
| FR2634233B1 (fr) * | 1988-07-12 | 1995-04-14 | Atochem | Procede de fabrication de pates chimicothermomecaniques blanchies |
| FR2659363B1 (fr) * | 1990-03-07 | 1996-04-19 | Atochem | Procede de preparation de pates a haut rendement blanchies. |
-
1991
- 1991-04-17 FR FR9104737A patent/FR2675518B1/fr not_active Expired - Fee Related
-
1992
- 1992-04-06 NO NO921335A patent/NO300225B1/no not_active IP Right Cessation
- 1992-04-13 IE IE921176A patent/IE75202B1/en not_active IP Right Cessation
- 1992-04-14 DE DE69212051T patent/DE69212051T2/de not_active Expired - Fee Related
- 1992-04-14 FI FI921671A patent/FI921671A/fi unknown
- 1992-04-14 AU AU14897/92A patent/AU650962B2/en not_active Ceased
- 1992-04-14 ES ES92401044T patent/ES2089436T3/es not_active Expired - Lifetime
- 1992-04-14 JP JP4120093A patent/JP2588495B2/ja not_active Expired - Lifetime
- 1992-04-14 NZ NZ242356A patent/NZ242356A/en unknown
- 1992-04-14 AT AT92401044T patent/ATE140283T1/de active
- 1992-04-14 EP EP92401044A patent/EP0509905B1/fr not_active Expired - Lifetime
- 1992-04-16 CA CA002066316A patent/CA2066316C/fr not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024133473A1 (fr) * | 2022-12-21 | 2024-06-27 | Billerud Aktiebolag (Publ) | Préparation de bois d'érable pour la production de ctmp |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2675518A1 (fr) | 1992-10-23 |
| ES2089436T3 (es) | 1996-10-01 |
| IE75202B1 (en) | 1997-08-27 |
| DE69212051T2 (de) | 1997-01-23 |
| AU1489792A (en) | 1992-10-22 |
| JPH06220788A (ja) | 1994-08-09 |
| NO921335D0 (no) | 1992-04-06 |
| IE921176A1 (en) | 1992-10-21 |
| CA2066316C (fr) | 1999-09-28 |
| EP0509905A1 (fr) | 1992-10-21 |
| FI921671A (fi) | 1992-10-18 |
| FI921671A0 (fi) | 1992-04-14 |
| EP0509905B1 (fr) | 1996-07-10 |
| AU650962B2 (en) | 1994-07-07 |
| ATE140283T1 (de) | 1996-07-15 |
| NO921335L (no) | 1992-10-19 |
| JP2588495B2 (ja) | 1997-03-05 |
| CA2066316A1 (fr) | 1992-10-18 |
| DE69212051D1 (de) | 1996-08-14 |
| NZ242356A (en) | 1994-06-27 |
| FR2675518B1 (fr) | 1996-10-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1226705A (fr) | Production chimicothermique de la pate a papier par traitements distincts a l'alcali et au sulfite | |
| NO150806B (no) | Fremgangmaate og anordning for behandling av vedflis | |
| NO147037B (no) | Fremgangsmaate ved fremstilling av cellulosemasse | |
| NO300225B1 (no) | Fremgangsmåte for fremstilling av bleket papirmasse i höyt utbytte | |
| NO151047B (no) | Fremgangsmaate ved peroxydbleking av hoeyutbyttemasse | |
| NO143298B (no) | Friserapparat. | |
| US4552616A (en) | Pulping process pretreatment using a lower alkanolamine in the presence of ammonium hydroxide | |
| NO140535B (no) | Fremgangsmaate for fremstilling av cellulosemasse ved oppslutning med oksygen | |
| NO152096B (no) | Fremgangsmaate for fremstilling av xantan ved kontinuerlig dyrking av polysakkaridproduserende bakterier | |
| NZ240910A (en) | Alkaline peroxide mechanical wood pulping process utilising a chelating agent pretreatment for removing metallic ions | |
| US4689117A (en) | Thermomechanical digestion process for enhancing the brightness of cellulose pulp using bleachants | |
| NO160325B (no) | Demonterbar stolfot. | |
| CA1173604A (fr) | Mode de production de pate mecanico-chimique | |
| US6752904B2 (en) | Process for removal of lignin from lignocellulosic material | |
| CA2453131C (fr) | Procedes de preparation des pates mecaniques ayant un degre de blancheur eleve | |
| NO176726B (no) | Fremgangsmåte for fremstilling av kjemotermomekanisk blekede masser | |
| AU778689B2 (en) | Pulping process | |
| JPH0114357B2 (fr) | ||
| US2882147A (en) | Semi-chemical pulping process | |
| CA2025522A1 (fr) | Defibrage par explosion | |
| EP1130155A1 (fr) | Procédé de délignification | |
| NO167312B (no) | Fremgangsmaate for forbleking av kjemiske cellulosemasser. |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MM1K | Lapsed by not paying the annual fees |
Free format text: LAPSED IN OCTOBER 2002 |