NZ278098A - Production of prehydrolysed kraft cellulosic material; neutralising hydrosylate with sodium hydroxide (naoh) and (na2s) - Google Patents
Production of prehydrolysed kraft cellulosic material; neutralising hydrosylate with sodium hydroxide (naoh) and (na2s)Info
- Publication number
- NZ278098A NZ278098A NZ278098A NZ27809895A NZ278098A NZ 278098 A NZ278098 A NZ 278098A NZ 278098 A NZ278098 A NZ 278098A NZ 27809895 A NZ27809895 A NZ 27809895A NZ 278098 A NZ278098 A NZ 278098A
- Authority
- NZ
- New Zealand
- Prior art keywords
- liquor
- digester
- cooking
- neutralizing
- hydrolysate
- Prior art date
Links
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 title claims abstract description 43
- 239000000463 material Substances 0.000 title claims abstract description 22
- 230000003472 neutralizing effect Effects 0.000 title claims abstract description 12
- 239000002655 kraft paper Substances 0.000 title claims description 26
- 238000004519 manufacturing process Methods 0.000 title description 10
- 238000010411 cooking Methods 0.000 claims abstract description 86
- 238000000034 method Methods 0.000 claims abstract description 43
- 239000000413 hydrolysate Substances 0.000 claims abstract description 18
- 229920005610 lignin Polymers 0.000 claims abstract description 5
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000003513 alkali Substances 0.000 claims description 31
- 238000006386 neutralization reaction Methods 0.000 claims description 24
- 239000002023 wood Substances 0.000 claims description 21
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 150000002500 ions Chemical class 0.000 claims description 4
- 230000008569 process Effects 0.000 abstract description 28
- 229910052979 sodium sulfide Inorganic materials 0.000 abstract description 3
- 238000006073 displacement reaction Methods 0.000 description 12
- 239000000126 substance Substances 0.000 description 9
- 102100030386 Granzyme A Human genes 0.000 description 8
- 101001009599 Homo sapiens Granzyme A Proteins 0.000 description 8
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 8
- 238000004061 bleaching Methods 0.000 description 8
- 235000011121 sodium hydroxide Nutrition 0.000 description 8
- 239000003795 chemical substances by application Substances 0.000 description 7
- 239000000460 chlorine Substances 0.000 description 7
- 230000007062 hydrolysis Effects 0.000 description 7
- 238000006460 hydrolysis reaction Methods 0.000 description 7
- 229920002488 Hemicellulose Polymers 0.000 description 6
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 6
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 6
- 239000011121 hardwood Substances 0.000 description 6
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 5
- 229910052801 chlorine Inorganic materials 0.000 description 5
- 230000000630 rising effect Effects 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 230000002378 acidificating effect Effects 0.000 description 4
- 230000003247 decreasing effect Effects 0.000 description 4
- 239000011122 softwood Substances 0.000 description 4
- 229920003043 Cellulose fiber Polymers 0.000 description 3
- 244000166124 Eucalyptus globulus Species 0.000 description 3
- 241001233195 Eucalyptus grandis Species 0.000 description 3
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 238000010923 batch production Methods 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 229910021645 metal ion Inorganic materials 0.000 description 3
- 238000009896 oxidative bleaching Methods 0.000 description 3
- 238000004537 pulping Methods 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 2
- 206010059027 Brugada syndrome Diseases 0.000 description 2
- 229920000875 Dissolving pulp Polymers 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 229920002678 cellulose Polymers 0.000 description 2
- 239000001913 cellulose Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
- 230000003301 hydrolyzing effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 235000010755 mineral Nutrition 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 150000002978 peroxides Chemical class 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 235000018185 Betula X alpestris Nutrition 0.000 description 1
- 235000018212 Betula X uliginosa Nutrition 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 240000000731 Fagus sylvatica Species 0.000 description 1
- 235000010099 Fagus sylvatica Nutrition 0.000 description 1
- 108010009736 Protein Hydrolysates Proteins 0.000 description 1
- 238000010793 Steam injection (oil industry) Methods 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 238000005904 alkaline hydrolysis reaction Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000007844 bleaching agent Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- 230000001010 compromised effect Effects 0.000 description 1
- 239000007857 degradation product Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 239000006166 lysate Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 150000003464 sulfur compounds Chemical class 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 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
- D21C3/00—Pulping cellulose-containing materials
- D21C3/02—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate processes
- D21C3/022—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate processes in presence of S-containing compounds
-
- 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
- D21C1/00—Pretreatment of the finely-divided materials before digesting
-
- 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
- D21C3/00—Pulping cellulose-containing materials
- D21C3/22—Other features of pulping processes
- D21C3/26—Multistage processes
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Paper (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Compounds Of Unknown Constitution (AREA)
- Saccharide Compounds (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI940332A FI103898B (fi) | 1994-01-24 | 1994-01-24 | Menetelmä prehydrolysoidun sellun ja/tai sellumassan tuottamiseksi |
| PCT/FI1995/000028 WO1995020065A1 (en) | 1994-01-24 | 1995-01-23 | Production of prehydrolyzed pulp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NZ278098A true NZ278098A (en) | 1998-01-26 |
Family
ID=8539665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NZ278098A NZ278098A (en) | 1994-01-24 | 1995-01-23 | Production of prehydrolysed kraft cellulosic material; neutralising hydrosylate with sodium hydroxide (naoh) and (na2s) |
Country Status (19)
| Country | Link |
|---|---|
| US (1) | US5589033A (OSRAM) |
| EP (1) | EP0796367B1 (OSRAM) |
| JP (1) | JP2984798B2 (OSRAM) |
| CN (1) | CN1102973C (OSRAM) |
| AT (1) | ATE202166T1 (OSRAM) |
| AU (1) | AU688447B2 (OSRAM) |
| BR (1) | BR9402395A (OSRAM) |
| CA (1) | CA2179914C (OSRAM) |
| DE (1) | DE69521336T2 (OSRAM) |
| ES (1) | ES2159311T3 (OSRAM) |
| FI (1) | FI103898B (OSRAM) |
| MY (1) | MY114661A (OSRAM) |
| NO (1) | NO963072L (OSRAM) |
| NZ (1) | NZ278098A (OSRAM) |
| PH (1) | PH31329A (OSRAM) |
| PT (1) | PT796367E (OSRAM) |
| TW (1) | TW317585B (OSRAM) |
| WO (1) | WO1995020065A1 (OSRAM) |
| ZA (1) | ZA95388B (OSRAM) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8535480B2 (en) | 2010-05-06 | 2013-09-17 | Bahia Specialty Cellulose Sa | Method and system for pulp processing using cold caustic extraction with alkaline filtrate reuse |
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| FI122654B (fi) * | 1997-12-08 | 2012-05-15 | Ovivo Luxembourg Sarl | Menetelmä paperisellumassan valmistamiseksi |
| US7005514B2 (en) * | 2002-10-16 | 2006-02-28 | International Paper Company | Process for preparing microcrystalline cellulose |
| US7285184B2 (en) * | 2003-04-21 | 2007-10-23 | Rayonier, Inc. | Cellulosic fiber pulp and highly porous paper products produced therefrom |
| US7812153B2 (en) * | 2004-03-11 | 2010-10-12 | Rayonier Products And Financial Services Company | Process for manufacturing high purity xylose |
| US8317975B2 (en) * | 2004-04-20 | 2012-11-27 | The Research Foundation Of The State University Of New York | Product and processes from an integrated forest biorefinery |
| PT1883731E (pt) * | 2005-05-24 | 2016-01-26 | Int Paper Co | Fibras kraft modificadas |
| US7520958B2 (en) * | 2005-05-24 | 2009-04-21 | International Paper Company | Modified kraft fibers |
| FI123036B (fi) | 2006-02-10 | 2012-10-15 | Metso Paper Inc | Menetelmä hydrolyysituotteiden talteenottamiseksi |
| AT503610B1 (de) * | 2006-05-10 | 2012-03-15 | Chemiefaser Lenzing Ag | Verfahren zur herstellung eines zellstoffes |
| US20070284068A1 (en) * | 2006-05-19 | 2007-12-13 | The Research Foundation Of State University Of New York | Methods for carbonate pretreatment and pulping of cellulosic material |
| US7842161B2 (en) * | 2006-12-18 | 2010-11-30 | The University Of Maine System Board Of Trustees | Pre-extraction and solvent pulping of lignocellulosic material |
| US7824521B2 (en) * | 2006-12-18 | 2010-11-02 | University Of Maine System Board Of Trustees | Process of treating a lignocellulosic material with hemicellulose pre-extraction and hemicellulose adsorption |
| US9260818B2 (en) * | 2007-05-23 | 2016-02-16 | Andritz Inc. | Single vessel reactor system for hydrolysis and digestion of wood chips with chemical enhanced wash method |
| US8734610B2 (en) * | 2007-05-23 | 2014-05-27 | Andritz Inc. | Two vessel reactor system and method for hydrolysis and digestion of wood chips with chemical enhanced wash method |
| WO2009031164A1 (en) * | 2007-09-07 | 2009-03-12 | Council Of Scientific & Industrial Research | A process for fractionating sugarcane bagasse into high a-cellulose pulp, xylan and lignin |
| US8303767B2 (en) * | 2008-03-18 | 2012-11-06 | The Research Foundation Of State University Of New York | Methods of pretreating comminuted cellulosic material with carbonate-containing solutions |
| WO2010019425A1 (en) * | 2008-08-15 | 2010-02-18 | Hercules Incorporated | Pulping additives for a reduction of resin from kraft pulp |
| FI121237B (fi) * | 2008-10-21 | 2010-08-31 | Danisco | Menetelmä ksyloosin ja liukosellun tuottamiseksi |
| ES2703390T3 (es) * | 2009-03-09 | 2019-03-08 | Treetotextile Ab | Procedimiento de fabricación de celulosa conformada combinado con un sistema de recuperación de fábrica de pasta |
| JP4604136B1 (ja) * | 2009-06-16 | 2010-12-22 | 株式会社 東亜興業 | パルプ製造装置、パルプ製造方法及び高濃度パルパー |
| AP2012006162A0 (en) * | 2009-08-13 | 2012-04-30 | Geosynfuels Llc | Apparatus and process for fermentation of biomass hydrolysate. |
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| WO2011138633A1 (en) * | 2010-05-04 | 2011-11-10 | Bahia Specialty Cellulose Sa | Method and system for pulp processing using cold caustic extraction with alkaline filtrate reuse |
| RU2535804C2 (ru) * | 2010-05-04 | 2014-12-20 | Байа Спешалти Сельюлоз Са | Способ и система производства растворимой целлюлозной массы с высоким содержанием альфа-целлюлозы |
| FI126842B (fi) | 2010-06-07 | 2017-06-15 | Aalto Univ Found | Uusi menetelmä mikroselluloosan valmistamiseksi |
| FI126649B (fi) | 2010-06-07 | 2017-03-31 | Aalto Univ Found | Uusi menetelmä mikroselluloosan valmistamiseksi |
| FI126573B (fi) | 2010-06-07 | 2017-02-28 | Kemira Oyj | Menetelmä mikroselluloosan valmistamiseksi |
| US8608970B2 (en) | 2010-07-23 | 2013-12-17 | Red Shield Acquisition, LLC | System and method for conditioning a hardwood pulp liquid hydrolysate |
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| US8951388B2 (en) | 2011-04-08 | 2015-02-10 | Pec-Tech Engineering And Construction Pte Ltd | Method and system for efficient production of dissolving pulp in a kraft mill producing paper grade pulp with a continuous type digester |
| CA2837277C (en) * | 2011-05-13 | 2017-06-27 | Metso Paper Sweden Ab | Compact process for producing prehydrolyzed pulp |
| US9228243B2 (en) | 2011-08-24 | 2016-01-05 | Red Shield Acquistion, LLC | System and method for conditioning a hardwood pulp liquid hydrolysate |
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| US9339058B2 (en) | 2012-04-19 | 2016-05-17 | R. J. Reynolds Tobacco Company | Method for producing microcrystalline cellulose from tobacco and related tobacco product |
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| JP6196022B2 (ja) * | 2012-07-31 | 2017-09-13 | 日本製紙株式会社 | 溶解クラフトパルプの製造方法 |
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| RU2678895C2 (ru) * | 2013-02-08 | 2019-02-04 | ДжиПи СЕЛЛЬЮЛОУС ГМБХ | КРАФТ-ВОЛОКНО ДРЕВЕСИНЫ ХВОЙНЫХ ПОРОД С УЛУЧШЕННЫМ СОДЕРЖАНИЕМ α-ЦЕЛЛЮЛОЗЫ И ЕГО ПРИМЕНЕНИЕ ПРИ ПРОИЗВОДСТВЕ ХИМИЧЕСКИХ ЦЕЛЛЮЛОЗНЫХ ПРОДУКТОВ |
| JP6522274B2 (ja) * | 2013-08-06 | 2019-05-29 | 日本製紙株式会社 | 溶解クラフトパルプの製造方法。 |
| SE538752C2 (en) * | 2014-11-21 | 2016-11-08 | Innventia Ab | Process for the production of a treated pulp, treated pulp, and textile fibers produced from the treated pulp |
| SE538454C2 (en) | 2014-11-27 | 2016-07-12 | Valmet Oy | Method for displacement in batch digesters |
| MX2017012913A (es) | 2015-04-10 | 2018-06-06 | Comet Biorefining Inc | Metodos y composiciones para el tratamiento de biomasa celulosica y productos producidos por estos. |
| WO2017142445A1 (en) * | 2016-02-16 | 2017-08-24 | Valmet Ab | Method for recovering concentrated hydrolysate after hydrolysis of cellulose material |
| JP6187619B2 (ja) * | 2016-03-07 | 2017-08-30 | 王子ホールディングス株式会社 | 溶解パルプの製造方法 |
| KR102607347B1 (ko) * | 2016-05-27 | 2023-11-27 | 파이브라테크 피티이. 엘티디 | 고 분자량 리그닌의 제조 방법 및 시스템 |
| CA3042711A1 (en) * | 2016-11-02 | 2018-05-11 | Robert C. CASAD, Jr. | Methods and devices for processing lignocellulosic biomass using mechanical pretreatment to enhance feedstock hydration properties |
| PT3673110T (pt) * | 2017-08-25 | 2025-04-21 | Valmet Oy | Processo compacto melhorado para produção de pasta de papel pré-hidrolisada |
| EP3790409B1 (en) | 2018-05-10 | 2024-12-18 | Comet Biorefining Inc. | Compositions comprising glucose and hemicellulose and their use |
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| WO2020132120A1 (en) * | 2018-12-18 | 2020-06-25 | North Carolina State University | Fast disintegrating paper products and methods of making |
| CN109837791A (zh) * | 2019-03-27 | 2019-06-04 | 北京林业大学 | 一种基于水热预处理的蔗渣碱法制浆方法 |
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| SE543159C2 (en) * | 2019-05-22 | 2020-10-13 | Valmet Oy | A method for extracting hydrolyzate, a batch cooking system and a hydrolyzate extracting arrangement |
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| CN113564956B (zh) * | 2021-07-13 | 2022-08-26 | 陕西国防工业职业技术学院 | 一种提高葡萄枝硫酸盐法脱木素效率的预水解方法 |
| RU2771348C1 (ru) * | 2021-09-14 | 2022-04-29 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Санкт-Петербургский государственный университет промышленных технологий и дизайна" | Способ получения целлюлозы |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US982379A (en) * | 1909-06-10 | 1911-01-24 | George H Marshall | Process for producing cellulose from fibrous materials. |
| US2701763A (en) * | 1947-11-06 | 1955-02-08 | Sivola George | Process of manufacturing pulp from cellulosic fibrous materials |
| US3243341A (en) * | 1961-11-20 | 1966-03-29 | Improved Machinery Inc | Continuous pulping apparatus |
| US3145135A (en) * | 1962-09-04 | 1964-08-18 | Sonoco Products Co | Multi-stage pulping process |
| US3413189A (en) * | 1964-01-29 | 1968-11-26 | Kamyr Ab | Method of performing hydrolysis and alkalic digestion of cellulosic fiber material with prevention of lignin precipitation |
| US3530034A (en) * | 1969-05-16 | 1970-09-22 | Itt Rayonier Inc | Continuous aqueous prehydrolysis of wood chips |
| SE389520B (sv) * | 1973-09-03 | 1976-11-08 | Kamyr Ab | Apparat for kontinuerlig utvinning av hydrolysat ur finfordelat fibermaterial |
| US4436586A (en) * | 1982-01-22 | 1984-03-13 | Kamyr, Inc. | Method of producing kraft pulp using an acid prehydrolysis and pre-extraction |
| US5053108A (en) * | 1989-06-28 | 1991-10-01 | Kamyr Ab | High sulfidity cook for paper pulp using black liquor sulfonization of steamed chips |
| US5183535B1 (en) * | 1990-02-09 | 1996-02-06 | Sunds Defibrator Rauma Oy | Process for preparing kraft pulp using black liquor pretreatment reaction |
| FI92224C (fi) * | 1991-06-28 | 1994-10-10 | Sunds Defibrator Rauma Oy | Eräprosessi kraftmassan valmistamiseksi |
| US5213662A (en) * | 1991-08-14 | 1993-05-25 | Kamyr, Inc. | Treatment of chips with high temperature black liquor to reduce black liquor viscosity |
| AT398588B (de) * | 1992-12-02 | 1994-12-27 | Voest Alpine Ind Anlagen | Verfahren zur herstellung von viskosezellstoffen |
| US5338366A (en) * | 1993-01-04 | 1994-08-16 | Kamyr, Inc. | Acid pre-hydrolysis reactor system |
-
1994
- 1994-01-24 FI FI940332A patent/FI103898B/fi not_active IP Right Cessation
- 1994-05-13 US US08/242,617 patent/US5589033A/en not_active Expired - Lifetime
- 1994-05-13 PH PH49775A patent/PH31329A/en unknown
- 1994-06-13 BR BR9402395A patent/BR9402395A/pt not_active IP Right Cessation
-
1995
- 1995-01-13 MY MYPI95000081A patent/MY114661A/en unknown
- 1995-01-18 ZA ZA95388A patent/ZA95388B/xx unknown
- 1995-01-23 JP JP7519370A patent/JP2984798B2/ja not_active Expired - Fee Related
- 1995-01-23 CA CA002179914A patent/CA2179914C/en not_active Expired - Lifetime
- 1995-01-23 EP EP95905669A patent/EP0796367B1/en not_active Expired - Lifetime
- 1995-01-23 CN CN95191316A patent/CN1102973C/zh not_active Expired - Fee Related
- 1995-01-23 AT AT95905669T patent/ATE202166T1/de active
- 1995-01-23 AU AU14194/95A patent/AU688447B2/en not_active Ceased
- 1995-01-23 PT PT95905669T patent/PT796367E/pt unknown
- 1995-01-23 ES ES95905669T patent/ES2159311T3/es not_active Expired - Lifetime
- 1995-01-23 TW TW084100578A patent/TW317585B/zh active
- 1995-01-23 NZ NZ278098A patent/NZ278098A/en unknown
- 1995-01-23 DE DE69521336T patent/DE69521336T2/de not_active Expired - Fee Related
- 1995-01-23 WO PCT/FI1995/000028 patent/WO1995020065A1/en not_active Ceased
-
1996
- 1996-07-23 NO NO963072A patent/NO963072L/no not_active Application Discontinuation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8535480B2 (en) | 2010-05-06 | 2013-09-17 | Bahia Specialty Cellulose Sa | Method and system for pulp processing using cold caustic extraction with alkaline filtrate reuse |
| US8734612B2 (en) | 2010-05-06 | 2014-05-27 | Bahia Specialty Cellulose | Method and system for high alpha dissolving pulp production |
Also Published As
| Publication number | Publication date |
|---|---|
| TW317585B (OSRAM) | 1997-10-11 |
| MY114661A (en) | 2002-12-31 |
| WO1995020065A1 (en) | 1995-07-27 |
| NO963072D0 (no) | 1996-07-23 |
| DE69521336T2 (de) | 2002-04-25 |
| ZA95388B (en) | 1995-09-26 |
| BR9402395A (pt) | 1995-10-17 |
| PT796367E (pt) | 2001-10-30 |
| FI103898B1 (fi) | 1999-10-15 |
| ES2159311T3 (es) | 2001-10-01 |
| CN1139464A (zh) | 1997-01-01 |
| EP0796367A1 (en) | 1997-09-24 |
| JPH09507697A (ja) | 1997-08-05 |
| AU688447B2 (en) | 1998-03-12 |
| DE69521336D1 (de) | 2001-07-19 |
| FI940332L (fi) | 1995-07-25 |
| PH31329A (en) | 1998-07-06 |
| CN1102973C (zh) | 2003-03-12 |
| NO963072L (no) | 1996-07-23 |
| AU1419495A (en) | 1995-08-08 |
| CA2179914A1 (en) | 1995-07-27 |
| CA2179914C (en) | 2005-09-20 |
| ATE202166T1 (de) | 2001-06-15 |
| JP2984798B2 (ja) | 1999-11-29 |
| US5589033A (en) | 1996-12-31 |
| EP0796367B1 (en) | 2001-06-13 |
| FI940332A0 (fi) | 1994-01-24 |
| FI103898B (fi) | 1999-10-15 |
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