WO1993015261A1 - Reduction en pate de materiaux vegetaux fibreux et recuperation de sous-produits resultants - Google Patents

Reduction en pate de materiaux vegetaux fibreux et recuperation de sous-produits resultants Download PDF

Info

Publication number
WO1993015261A1
WO1993015261A1 PCT/US1993/001256 US9301256W WO9315261A1 WO 1993015261 A1 WO1993015261 A1 WO 1993015261A1 US 9301256 W US9301256 W US 9301256W WO 9315261 A1 WO9315261 A1 WO 9315261A1
Authority
WO
WIPO (PCT)
Prior art keywords
black liquor
lignin
furfural
organic solvent
alcohol
Prior art date
Application number
PCT/US1993/001256
Other languages
English (en)
Inventor
Jairo H. Lora
Raphael Katzen
Malcolm Cronlund
Chih Fae Wu
Goyal C. Gopal
Stephen R. Winner
Ron Leblanc
Mikhail N. Raskin
Richard C. Agar
Original Assignee
Allcell Technologies Inc.
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.)
Filing date
Publication date
Priority claimed from PCT/US1992/000720 external-priority patent/WO1992013849A1/fr
Application filed by Allcell Technologies Inc. filed Critical Allcell Technologies Inc.
Priority to BR9305819A priority Critical patent/BR9305819A/pt
Priority to AU36649/93A priority patent/AU676829B2/en
Priority to EP93905902A priority patent/EP0746650A4/fr
Priority to JP5513540A priority patent/JPH08500854A/ja
Publication of WO1993015261A1 publication Critical patent/WO1993015261A1/fr
Priority to FI943541A priority patent/FI943541A/fi
Priority to NO942824A priority patent/NO942824L/no

Links

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
    • D21C11/00—Regeneration of pulp liquors or effluent waste waters
    • D21C11/0007—Recovery of by-products, i.e. compounds other than those necessary for pulping, for multiple uses or not otherwise provided for
    • 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
    • D21C11/00—Regeneration of pulp liquors or effluent waste waters
    • D21C11/0021—Introduction of various effluents, e.g. waste waters, into the pulping, recovery and regeneration cycle (closed-cycle)
    • D21C11/0028—Effluents derived from the washing or bleaching plants
    • 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
    • D21C3/20—Pulping cellulose-containing materials with organic solvents or in solvent environment

Definitions

  • a novel lignin is precipitated by the process of this invention.
  • a preferred lignin is characterized by: a number average molecular weight of about 700 to 1500 g/mol, a glass transition temperature of about 70° to 170°C, a polydispersity of less than about 4 and a methc ⁇ yl content approximately equal to that of native lignin.
  • the fibrous plant materials in the extractor 2 are preheated with low pressure steam, and then, a twice- used 60% ethanol/40% water, primary solvent from a primary solvent accumulator 3 contacts the fibrous plant materials in the extractor 2.
  • the primary solvent is rapidly recirculated through the extractor 2 and through a peak load (e.g., steam-heated) heat exchanger 4 to raise the temperature of the fibrous plant materials to about 190° to 200°C in a few minutes (preferably not more than about 5 minutes).
  • a peak load e.g., steam-heated
  • a time of from about 5 to 60 minutes is required.
  • the steaming vessel can be equipped with a vent which can be connected to a heat exchanger, for example a water cooled condenser which can be used to condense any vapors and produce a condensate which can be returned to solvent recovery tower 14 and recycled for reuse with the solvent.
  • Line 46 can be equipped with a steam barrier which helps prevent backup of alcohol-containing vapors into rotary valve feeder 33.
  • the steamed fibrous plant materials are passed through a second rotary valve feeder 34 and are mixed in line 45 with a solvent from line 36 as shown in Figures 3 and 4.
  • the solvent is mixed with the chips in high pressure sluice 35 or the solvent is mixed with the chips in chip sluice tank 65 as shown in Figures 9 and 10.
  • the cooking mixture passes through line 57 into chip sluice tank 65.
  • line 57 is equipped with a heat exchanger 69 which can operate to reduce the temperature of the cooking mixture to a level such that the liquid in the cooking mixture does not flash when the cooking mixture passes through pressure reduction device 70 (e.g. a pressure reducing valve or a turbine), or when the cooking mixture passes through chip sluice tank 65.
  • Pressure reduction device 70 can operate to reduce the pressure of the cooking mixture in line 57, namely to from 650 psig to about 20 to 650 psig.
  • the pressure reduction device 70 operates to reduce the pressure in line 46 from an operating pressure within extractor 100 to a pressure slightly below the presure in line 46.
  • the cooking mixture is further cooled to from about 70° to 100°C in cooling zone (f) for about 22 minutes and broken up into pulp with mixer 102. Cooling of the cooking mixture in cooling zone (f) is ac ' -ieved by mixing the mixture with the so vent introduced at inlet 52 in a counter-current fashion and at inlet 53 in a co-current fashion.
  • the solvent mixture consis t s of makeup alcohol, recycled alcohol from the alcohol and by-product recovery and alcohol/water filtrate from counter-current washing equipment 44 or alternatively from washing equipment 77.
  • the pulp exits extractor 100 through line 41.
  • the pulp is defiberized as the pulp passes through pressure reduction valve 42.
  • Pressure reduction valve 42 is preferably a blow valve.
  • the pulp is washed in pulp washing equipment 47 (e.g. one or more pressure diffusers, drum washers or belt washers) with recycled alcohol through line 7 and make-up alcohol through line 49 and cooled to a temperature below 80°C while simultaneously additional lignin is removed and recycled through line 36 and the kappa number is reduced to a bleachable grade.
  • the pulp is further washed in multistage counter-current washing equipment 44 by introduction of water or bleaching filtrates through line 43 and cooled to a temperature of from about 40° to 70°C.
  • the black liquor can be heated by steam injection or indirect heating before flashing in flash tank 11 to vaporize more ethanol, therefore decreasing the ethanol concentration of the liquor to from about 25 to 34% and reducing the amount of dilution water needed for precipitation by from about 20 to 70%.
  • Steam injection or indirect heating can also be introduced directly into flash tank 11 or in any of the flash tanks that can be used in sequential series with flash tank 11.
  • the ethanol/water vapors obtained are condensed in condenser 8 and recycled, along with any makeup ethanol, water and/or acid, for use in treating subsequent batches of fibrous plant materials.
  • the residual black liquor from flash tank 11 in Figures 1, 3, 4 , 9, 10, 11 and 12 can be pumped through a small nozzle 21 located at about the center of a pipe 22 in the venturi-type device 20 in Figure 2, and the acid and water solution can flow in the pipe 22 towards the settling tank 12.
  • the residual black liquor is injected by the nozzle 21 into the acid and water solution - in the pipe 22, the residual black liquor is rapidly diluted and cooled by the acid and water in the pipe 22.
  • Lignin rapidly precipitates as fine solids from the resulting diluted residual black liquor in the .pipe 22, which solids can be easily collected and concentrated in the settling tank 12 and centrifugal separator 13.
  • the upgraded furfural raffinate can be further purified to remove the water (e.g. by dehydration or pervaporation) .
  • Figures 5 and 6 are illustrative of purification by pervaporation.
  • the pervaporation system 80 is comprised of a cell separated by a membrane 82 into two compartments 81 and 83.
  • Membrane 82 is preferably a hydrophyllic membrane, for example, a poiyvinyl alcohol membrane.
  • the upgraded furfural is fed into compartment 31 and the water contained in the upgraded furfural is preferentially attracted by membrane 82.
  • the water travels through membrane 82 into compartment 83.
  • the bottoms stream removed from the solvent recovery tower 14 contains wood sugars, low molecular weight lignins, acetic acid, ash and other minor components.
  • a portion of the bottoms stream is preferably concentrated in a conventional manner, for example, in multiple effect evaporators 26. In this step, scaling or fouling of the evaporation equipment is not a significant problem because there are no substantial amounts of high molecular weight lignin in the bottoms stream from the solvent recovery tower 14.
  • Organic solvents such as diethyl ether, cyclohexane, furan, and 3-hexanol can be used, however furfural is a particularly preferred solvent since it removes in excess of 70% of the low molecular weight lignin present in the aqueous phase in a single extraction.
  • the furfural obtained by upgrading and purification as shown in Figures 5 and 6 can also be used to extract the low molecular weight lignin as described above.
  • the raffinate from column 93 contains from about 5 to 20% low molecular weight lignin, from about 70 to 85% furfural and from about 5 to 15% water.
  • the raffinate is vacuum distilled in column 94.
  • the bottoms stream from column 94 contain low molecular weight lignin and the condensate from condenser 940 containing primarily from about 85 to 95% furfural and from about 5 to 15% water is recycled to column 93.
  • the extract from column 93 containing from about 6 to 10% furfural, from about 4 to 5% sugars and from about 50 to 80% water is stripped from furfural in column 95.
  • the condensate from column 95 in condenser 950 is decanted in decanter 96 and the heavy layer containing from about 85 to 95% furfural and from about 5 to 15% water is recycled to column 93.
  • the stripper, bottoms from column 95 contain sugars, mostly xylose, which can be further used for furfural production by acid catalyzed dehydration.
  • the acid can be separately added to the residual black liquor from the flash tank 11 in Figure 1 by adding the acid to the primary solvent from the primary solvent accumulator 3 before the primary solvent is used in the extractor 2 for pulping fibrous plant materials to produce the black liquor (which becomes, after removal • of ethanol in the flash tank 11, the residual black liquor).
  • the process of this invention can be carried out with a water miscible organic solvent other than a lower aliphatic alcohol (preferably ethanol), such as acetone, glycol or glycerol, or with a mixture of such solvents.
  • these processes can be carried out using any fibrous plant material, such a bamboo, bagasse, kenaf, cereal straws, and not just wood.

Landscapes

  • Paper (AREA)

Abstract

Les filtrats provenant du blanchiment et de la délignification de la pâte sont recyclés afin d'être réutilisés lors de la réduction en pâte, de la séparation et de la récupération de lignine et d'autres sous-produits, ce qui permet des économies d'énergie substantielles et la diminution voire l'élimination de la pollution associé typiquement au blanchiment. L'invention se rapporte également aux produits dérivés du procédé et à un appareil destiné à le mettre en ÷uvre. Les lignines de poids moléculaires divers et les sous-produits du procédé de réduction en pâte sont également récupérés (13). Les lignines sont précipitées (20) à des rendements élevés et à grande vitesse à partir d'une liqueur noire (40) produite par réduction en pâte du bois (100) à températures et à pressions élevées. On récupère un produit de furfural purifié (71) sous forme de sous-produit de ce processus. On peut recycler ce produit de furfural de façon à l'utiliser pour la récupération de lignine de faible poids moléculaire de ce processus.
PCT/US1993/001256 1992-01-29 1993-01-29 Reduction en pate de materiaux vegetaux fibreux et recuperation de sous-produits resultants WO1993015261A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
BR9305819A BR9305819A (pt) 1992-01-29 1993-01-29 Processo para produção de polpa de materiais de plantas fibrosos e recuperação dos subprodutos resultantes
AU36649/93A AU676829B2 (en) 1992-01-29 1993-01-29 Pulping of fibrous plant materials and recovery of resultantby-products
EP93905902A EP0746650A4 (fr) 1992-01-29 1993-01-29 Reduction en pate de materiaux vegetaux fibreux et recuperation de sous-produits resultants
JP5513540A JPH08500854A (ja) 1992-01-29 1993-01-29 繊維質植物原料のパルプ化及び生成する副生物の回収
FI943541A FI943541A (fi) 1992-01-29 1994-07-28 Kuitupitoisen kasvimateriaalin kuidutus ja syntyvien sivutuotteiden talteenotto
NO942824A NO942824L (no) 1992-01-29 1994-07-29 Oppslutning av fiberholdig plantemateriale, samt gjenvinning av dannede biprodukter

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PCT/US1992/000720 WO1992013849A1 (fr) 1991-02-01 1992-01-29 Reduction en pate de matieres lignocellulosiques et recuperation des sous-produits qui en resultent
USPCT/US92/00720 1992-01-29

Publications (1)

Publication Number Publication Date
WO1993015261A1 true WO1993015261A1 (fr) 1993-08-05

Family

ID=22230761

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1993/001256 WO1993015261A1 (fr) 1992-01-29 1993-01-29 Reduction en pate de materiaux vegetaux fibreux et recuperation de sous-produits resultants

Country Status (8)

Country Link
EP (1) EP0746650A4 (fr)
JP (1) JPH08500854A (fr)
AU (3) AU676829B2 (fr)
BR (1) BR9305819A (fr)
CA (1) CA2116544A1 (fr)
FI (1) FI943541A (fr)
NO (1) NO942824L (fr)
WO (1) WO1993015261A1 (fr)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995010656A1 (fr) * 1993-10-15 1995-04-20 Macmillan Bloedel Limited Recuperation du methanol
WO1997036040A1 (fr) * 1996-03-25 1997-10-02 Alcell Technologies Inc. Pates organosolv blanchies a l'ozone
CN1324191C (zh) * 2003-11-20 2007-07-04 罗学刚 高纯木素、纤维高效分离技术
WO2011110746A1 (fr) * 2010-03-11 2011-09-15 Metso Paper, Inc. Procédé pour la production de pâte
EP2435457A1 (fr) * 2009-05-28 2012-04-04 Lignol Innovations Ltd. Compositions de résine comprenant des dérivés de lignine
EP2435456A4 (fr) * 2009-05-28 2012-12-12 Lignol Innovations Ltd Dérivés de lignine naturelle provenant de charges d'alimentation de bois de feuillus
WO2013079431A1 (fr) * 2011-11-28 2013-06-06 Annikki Gmbh Procédé pour obtenir de la lignine à bas poids moléculaire (nml)
US8603295B2 (en) 2009-04-23 2013-12-10 Greenfield Specialty Alcohols Inc. Separation of reactive cellulose from lignocellulosic biomass with high lignin content
US9187862B2 (en) 2010-11-05 2015-11-17 Greenfield Specialty Alcohols Inc. Bagasse fractionation for cellulosic ethanol and chemical production
US9255189B2 (en) 2011-07-28 2016-02-09 Greenfield Specialty Alcohols Inc. Ethanol production with two stage continuous steam pre-treatment of lignocellulosic biomass
US9714264B2 (en) 2011-11-28 2017-07-25 Annikki Gmbh Method for working up an aqueous lignin containing solution
FR3049620A1 (fr) * 2016-04-05 2017-10-06 Swm Luxembourg Sarl Papier vegetal comprenant des fibres d'une plante
US9840621B2 (en) 2011-03-24 2017-12-12 Fibria Innovations Inc. Compositions comprising lignocellulosic biomass and organic solvent
US9932707B2 (en) 2010-11-05 2018-04-03 Greenfield Specialty Alcohols Inc. Bagasse fractionation for cellulosic ethanol and chemical production
US9982174B2 (en) 2010-02-15 2018-05-29 Fibria Innovations Inc. Binder compositions comprising lignin derivatives
US10533030B2 (en) 2010-02-15 2020-01-14 Suzano Canada Inc. Carbon fibre compositions comprising lignin derivatives
US20220162512A1 (en) * 2019-03-21 2022-05-26 Regents Of The University Of Minnesota Melt-flowable extracts from biomass as a selective additive for agglomerated biomass with binding and moisture resistance properties

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR112014012982B1 (pt) 2011-11-30 2018-11-13 Oji Holdings Corporation método para fabricação de monossacarídeos, oligossacarídeos e furfurais a partir de biomassa
CN104928963B (zh) * 2015-05-08 2017-10-24 白博 一种零排放的化机浆制浆废液在线高浓提取工艺
WO2017170093A1 (fr) * 2016-03-30 2017-10-05 王子ホールディングス株式会社 Composition de furfural et procédé de production de composition de furfural
FI129347B (en) * 2018-10-23 2021-12-15 Teknologian Tutkimuskeskus Vtt Oy Extraction of valuable components from bark

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3585104A (en) * 1968-07-29 1971-06-15 Theodor N Kleinert Organosolv pulping and recovery process
US4100016A (en) * 1975-10-24 1978-07-11 C P Associates Limited Solvent pulping process
US4401514A (en) * 1980-04-10 1983-08-30 Vereinigte Edelstahlwerke Ag (Vew) Method for the recovery of furfural, acetic acid and formic acid
US4470876A (en) * 1982-07-22 1984-09-11 Beaupre Marc F Kraft overload recovery process
US4511433A (en) * 1980-06-20 1985-04-16 Battelle Memorial Institute Method for the simultaneous delignification of wood and other ligno-cellulosic materials and hydrolysis of the hemicellulose component thereof
US4584057A (en) * 1985-04-22 1986-04-22 The United States Of America As Represented By The Secretary Of Agriculture Membrane processes for separation of organic acids from kraft black liquors
US4764596A (en) * 1985-11-05 1988-08-16 Repap Technologies Inc. Recovery of lignin
US4971657A (en) * 1987-05-12 1990-11-20 Gesellschaft m.b.H. Voest-Alpine Industrieanlagenbau Combined process for thermally and chemically treating lignocellulose-containing biomass and for producing furfural and cellulose-containing fiber masses

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE330819B (fr) * 1966-09-12 1970-11-30 Kamyr Ab
AT385061B (de) * 1985-11-29 1988-02-10 Neusiedler Ag Verfahren zur gewinnung von zellstoff aus pflanzenfasermaterial

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3585104A (en) * 1968-07-29 1971-06-15 Theodor N Kleinert Organosolv pulping and recovery process
US4100016A (en) * 1975-10-24 1978-07-11 C P Associates Limited Solvent pulping process
US4401514A (en) * 1980-04-10 1983-08-30 Vereinigte Edelstahlwerke Ag (Vew) Method for the recovery of furfural, acetic acid and formic acid
US4511433A (en) * 1980-06-20 1985-04-16 Battelle Memorial Institute Method for the simultaneous delignification of wood and other ligno-cellulosic materials and hydrolysis of the hemicellulose component thereof
US4470876A (en) * 1982-07-22 1984-09-11 Beaupre Marc F Kraft overload recovery process
US4584057A (en) * 1985-04-22 1986-04-22 The United States Of America As Represented By The Secretary Of Agriculture Membrane processes for separation of organic acids from kraft black liquors
US4764596A (en) * 1985-11-05 1988-08-16 Repap Technologies Inc. Recovery of lignin
US4971657A (en) * 1987-05-12 1990-11-20 Gesellschaft m.b.H. Voest-Alpine Industrieanlagenbau Combined process for thermally and chemically treating lignocellulose-containing biomass and for producing furfural and cellulose-containing fiber masses

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP0746650A4 *

Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5507913A (en) * 1993-10-15 1996-04-16 Macmillan Bloedel Limited Solvent recovery in pulp bleaching with ozone
WO1995010656A1 (fr) * 1993-10-15 1995-04-20 Macmillan Bloedel Limited Recuperation du methanol
WO1997036040A1 (fr) * 1996-03-25 1997-10-02 Alcell Technologies Inc. Pates organosolv blanchies a l'ozone
CN1324191C (zh) * 2003-11-20 2007-07-04 罗学刚 高纯木素、纤维高效分离技术
US8603295B2 (en) 2009-04-23 2013-12-10 Greenfield Specialty Alcohols Inc. Separation of reactive cellulose from lignocellulosic biomass with high lignin content
US9708490B2 (en) 2009-05-28 2017-07-18 Fibria Innovations Inc. Derivatives of native lignin
US9267027B2 (en) 2009-05-28 2016-02-23 Fibria Innovations Inc. Resin compositions comprising lignin derivatives
EP2435456A4 (fr) * 2009-05-28 2012-12-12 Lignol Innovations Ltd Dérivés de lignine naturelle provenant de charges d'alimentation de bois de feuillus
EP2435457A4 (fr) * 2009-05-28 2012-12-12 Lignol Innovations Ltd Compositions de résine comprenant des dérivés de lignine
US10435562B2 (en) 2009-05-28 2019-10-08 Fibria Innovations Inc. Derivatives of native lignin, lignin-wax compositions, their preparation, and uses thereof
EP2435457A1 (fr) * 2009-05-28 2012-04-04 Lignol Innovations Ltd. Compositions de résine comprenant des dérivés de lignine
CN102459293A (zh) * 2009-05-28 2012-05-16 丽格诺创新有限公司 包含木素衍生物的树脂组合物
CN107022089A (zh) * 2009-05-28 2017-08-08 菲布里亚创新有限公司 包含木素衍生物的树脂组合物
US10533030B2 (en) 2010-02-15 2020-01-14 Suzano Canada Inc. Carbon fibre compositions comprising lignin derivatives
US9982174B2 (en) 2010-02-15 2018-05-29 Fibria Innovations Inc. Binder compositions comprising lignin derivatives
CN102472006B (zh) * 2010-03-11 2014-10-22 瓦尔梅特技术公司 生产纸浆的方法
WO2011110746A1 (fr) * 2010-03-11 2011-09-15 Metso Paper, Inc. Procédé pour la production de pâte
CN102472006A (zh) * 2010-03-11 2012-05-23 梅特索纸业公司 生产纸浆的方法
US9932707B2 (en) 2010-11-05 2018-04-03 Greenfield Specialty Alcohols Inc. Bagasse fractionation for cellulosic ethanol and chemical production
US9187862B2 (en) 2010-11-05 2015-11-17 Greenfield Specialty Alcohols Inc. Bagasse fractionation for cellulosic ethanol and chemical production
US9840621B2 (en) 2011-03-24 2017-12-12 Fibria Innovations Inc. Compositions comprising lignocellulosic biomass and organic solvent
US9255189B2 (en) 2011-07-28 2016-02-09 Greenfield Specialty Alcohols Inc. Ethanol production with two stage continuous steam pre-treatment of lignocellulosic biomass
US9714264B2 (en) 2011-11-28 2017-07-25 Annikki Gmbh Method for working up an aqueous lignin containing solution
WO2013079431A1 (fr) * 2011-11-28 2013-06-06 Annikki Gmbh Procédé pour obtenir de la lignine à bas poids moléculaire (nml)
CN109312542A (zh) * 2016-04-05 2019-02-05 斯瓦蒙卢森堡有限责任公司 包含植物纤维的植物纸张
WO2017174661A1 (fr) * 2016-04-05 2017-10-12 Swm Luxembourg Sarl Papier végétal comprenant des fibres d'une plante
FR3049620A1 (fr) * 2016-04-05 2017-10-06 Swm Luxembourg Sarl Papier vegetal comprenant des fibres d'une plante
AU2017247615B2 (en) * 2016-04-05 2021-03-11 Swm Luxembourg Sarl Vegetable paper comprising fibres of a plant
US11035079B2 (en) 2016-04-05 2021-06-15 Schweitzer-Mauduit International, Inc. Vegetable paper comprising fibres of a plant
CN109312542B (zh) * 2016-04-05 2022-06-21 斯瓦蒙卢森堡有限责任公司 包含植物纤维的植物纸张
US11619007B2 (en) 2016-04-05 2023-04-04 Mativ Holdings, Inc. Vegetable paper comprising fibres of a plant
US20220162512A1 (en) * 2019-03-21 2022-05-26 Regents Of The University Of Minnesota Melt-flowable extracts from biomass as a selective additive for agglomerated biomass with binding and moisture resistance properties

Also Published As

Publication number Publication date
NO942824D0 (no) 1994-07-29
JPH08500854A (ja) 1996-01-30
CA2116544A1 (fr) 1993-08-05
EP0746650A1 (fr) 1996-12-11
AU676829B2 (en) 1997-03-27
AU1239897A (en) 1997-03-20
AU1239797A (en) 1997-03-13
EP0746650A4 (fr) 1998-01-07
NO942824L (no) 1994-09-28
BR9305819A (pt) 1997-02-18
FI943541A0 (fi) 1994-07-28
AU3664993A (en) 1993-09-01
FI943541A (fi) 1994-09-19

Similar Documents

Publication Publication Date Title
US5788812A (en) Method of recovering furfural from organic pulping liquor
WO1992013849A1 (fr) Reduction en pate de matieres lignocellulosiques et recuperation des sous-produits qui en resultent
AU676829B2 (en) Pulping of fibrous plant materials and recovery of resultantby-products
US4764596A (en) Recovery of lignin
EP0224721B1 (fr) Obtention de la lignine
US4100016A (en) Solvent pulping process
JP3348387B2 (ja) ギ酸を添加した酢酸によるパルプの製法
US3585104A (en) Organosolv pulping and recovery process
CA2659015C (fr) Procede de traitement etape par etape d'un materiau lignocellulosique pour produire des composes chimiques de base reactifs
US20150072389A1 (en) Process for the stepwise treatment of lignocellulosic material to produce reactive chemical feedstocks
US20110165643A1 (en) Separation of Lignin From Hydrolyzate
WO1996041052A1 (fr) Fabrication de pate a papier avec un solvant organique modifie
WO1999067409A1 (fr) Procede de traitement de matiere de biomasse
WO2017181280A1 (fr) Récupération de lignine et production de furfural à partir de flux de préhydrolysat de biomasse
CA1111694A (fr) Methode et installation de digestion continue de fibres vegetales
EP1481124B1 (fr) Procede de production de furfural, d'acide formique et d'acide acetique a partir d'une liqueur noire derivee de la cuisson de la pate a papier
FI129729B (en) Method and apparatus for recovering furfural
US20200123120A1 (en) Method and an apparatus for separating furfural
US11118017B2 (en) Process for the production of bioproducts from lignocellulosic material
JPS61231292A (ja) パルプの製造方法
MXPA97009857A (en) Formation of organosolv pulp modific

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AU BR CA CZ FI HU JP KR NO NZ PL PT RU UA

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
WWE Wipo information: entry into national phase

Ref document number: 2116544

Country of ref document: CA

WWE Wipo information: entry into national phase

Ref document number: 943541

Country of ref document: FI

WWE Wipo information: entry into national phase

Ref document number: 1993905902

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 1993905902

Country of ref document: EP

WWW Wipo information: withdrawn in national office

Ref document number: 1993905902

Country of ref document: EP