ZA200701627B - Method for separating lignin from a lignin containing liquid/slurry - Google Patents

Method for separating lignin from a lignin containing liquid/slurry Download PDF

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Publication number
ZA200701627B
ZA200701627B ZA200701627A ZA200701627A ZA200701627B ZA 200701627 B ZA200701627 B ZA 200701627B ZA 200701627 A ZA200701627 A ZA 200701627A ZA 200701627 A ZA200701627 A ZA 200701627A ZA 200701627 B ZA200701627 B ZA 200701627B
Authority
ZA
South Africa
Prior art keywords
lignin
level
slurry
liquid
dewatering
Prior art date
Application number
ZA200701627A
Other languages
English (en)
Inventor
Ohman Fredrik
Theliander Hans
Norgren Magnus
Tomani Per
Axegard Peter
Original Assignee
Lignoboostab
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
Application filed by Lignoboostab filed Critical Lignoboostab
Publication of ZA200701627B publication Critical patent/ZA200701627B/en

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Classifications

    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21CPRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C11/00Regeneration of pulp liquors or effluent waste waters
    • D21C11/0007Recovery of by-products, i.e. compounds other than those necessary for pulping, for multiple uses or not otherwise provided for

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  • Compounds Of Unknown Constitution (AREA)
  • Paper (AREA)
  • Treatment Of Sludge (AREA)
ZA200701627A 2004-10-07 2005-10-03 Method for separating lignin from a lignin containing liquid/slurry ZA200701627B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE0402437A SE0402437D0 (sv) 2004-10-07 2004-10-07 Method for separating lignin from a lignin containing liquid/slurry

Publications (1)

Publication Number Publication Date
ZA200701627B true ZA200701627B (en) 2008-07-30

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ID=33434212

Family Applications (2)

Application Number Title Priority Date Filing Date
ZA200701627A ZA200701627B (en) 2004-10-07 2005-10-03 Method for separating lignin from a lignin containing liquid/slurry
ZA200802400A ZA200802400B (en) 2004-10-07 2008-03-14 Method for separating lignin from a lignin containing liquid/slurry

Family Applications After (1)

Application Number Title Priority Date Filing Date
ZA200802400A ZA200802400B (en) 2004-10-07 2008-03-14 Method for separating lignin from a lignin containing liquid/slurry

Country Status (11)

Country Link
US (1) US8815052B2 (fr)
EP (1) EP1797236B1 (fr)
JP (1) JP4887299B2 (fr)
AT (1) ATE513082T1 (fr)
BR (1) BRPI0517543B1 (fr)
CA (1) CA2580834C (fr)
ES (1) ES2368553T3 (fr)
PT (1) PT1797236E (fr)
SE (1) SE0402437D0 (fr)
WO (1) WO2006038863A1 (fr)
ZA (2) ZA200701627B (fr)

Families Citing this family (72)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE0402201D0 (sv) * 2004-09-14 2004-09-14 Stfi Packforsk Ab Method for separating lignin from black liquor
US8172981B2 (en) * 2004-09-14 2012-05-08 Lignoboost Ab Separating lignin from black liquor by precipitation, suspension and separation
JP4316536B2 (ja) * 2005-06-07 2009-08-19 独立行政法人科学技術振興機構 リグニン誘導体の分離及び回収方法
WO2007120091A1 (fr) * 2006-03-16 2007-10-25 Stfi-Packforsk Ab Procédé permettant de séparer du pentose polymérique d'un liquide/d'une suspension épaisse
SE532840C2 (sv) 2008-02-14 2010-04-20 Lars Eriksson Biobränsle
BRPI0822336B1 (pt) 2008-02-21 2020-12-01 Lignoboost Ab método para separação de lignina de licor negro, produto de lignina, e uso de um produto de lignina para a produção de combustíveis ou materiais
EP3037459B1 (fr) * 2008-07-16 2020-11-04 Renmatix, Inc. Raffineries bio à plate-forme de technologie nano-catalytico-solvo-thermique
US8546560B2 (en) * 2008-07-16 2013-10-01 Renmatix, Inc. Solvo-thermal hydrolysis of cellulose
ES2571977T3 (es) 2009-06-10 2016-05-27 Valmet Oy Método para precipitar lignina a partir de lejía negra utilizando gases residuales
US20120103039A1 (en) * 2009-07-07 2012-05-03 Sveaskog Forvaltnings Ab Method for preparing slow release fertilizers
WO2011005174A1 (fr) * 2009-07-07 2011-01-13 Sveaskog Förvaltnings AB Engrais à libération lente
JP5657657B2 (ja) 2009-07-13 2015-01-21 ベータ リニューアブルス エス・ピー・エーBETA RENEWABLES S.p.A. リグニンの高温分離方法
US9879119B2 (en) 2009-09-25 2018-01-30 Michael A. Lake Lignin product and process for making same
WO2011037967A2 (fr) * 2009-09-25 2011-03-31 Lake Michael A Procédé de récupération de lignine
CA2769746C (fr) 2010-01-19 2013-10-15 Renmatix, Inc. Production de sucres fermentescibles et de lignine a partir de biomasse a l'aide de fluides supercritiques
WO2011138356A1 (fr) 2010-05-07 2011-11-10 Basf Se Procédé de production de gaz de synthèse et d'au moins une matière valorisable organique liquide ou liquéfiable
WO2011138357A1 (fr) 2010-05-07 2011-11-10 Basf Se Procédé de préparation d'au moins une matière valorisable aromatique de faible poids moléculaire à partir d'une matière de départ contenant de la lignine
WO2011138355A2 (fr) 2010-05-07 2011-11-10 Basf Se Procédé de production de cellulose et d'au moins une matière valorisable organique liquide ou liquéfiable avec recyclage des effluents gazeux
BR112012030594A2 (pt) * 2010-06-03 2016-08-16 Fpinnovations processo para remover lignina de licor negro
WO2011162420A1 (fr) * 2010-06-25 2011-12-29 ロペスアンドエヌティ有限会社 Procédé de récupération de lignine dans la plage neutre à partir d'une lessive résiduaire de cuisson
CN103201395B (zh) 2010-06-26 2016-03-02 威尔迪亚有限公司 糖混合物及其生产和使用方法
IL206678A0 (en) 2010-06-28 2010-12-30 Hcl Cleantech Ltd A method for the production of fermentable sugars
US8771832B2 (en) 2010-06-30 2014-07-08 Weyerhaeuser Nr Company Lignin/polyacrylonitrile-containing dopes, fibers, and methods of making same
US9567360B2 (en) * 2010-07-07 2017-02-14 Stora Enso Oyj Process for production of precipitated lignin from black liquor and precipitated lignin produced by the process
WO2012013735A1 (fr) 2010-07-29 2012-02-02 Basf Se Composition contenant un catalyseur et de la lignine, et utilisation de ladite composition pour la production d'une composition aromatique
IL207329A0 (en) 2010-08-01 2010-12-30 Robert Jansen A method for refining a recycle extractant and for processing a lignocellulosic material and for the production of a carbohydrate composition
IL207945A0 (en) 2010-09-02 2010-12-30 Robert Jansen Method for the production of carbohydrates
EP2627659B1 (fr) 2010-10-15 2016-04-20 UPM-Kymmene Corporation Procédé continu pour la précipitation de lignine à partir de liqueur noire
PT106039A (pt) 2010-12-09 2012-10-26 Hcl Cleantech Ltd Processos e sistemas para o processamento de materiais lenhocelulósicos e composições relacionadas
GB2505148B8 (en) 2011-04-07 2016-12-07 Virdia Ltd Lignocellulose conversion processes and products
AU2012250575B2 (en) 2011-05-04 2015-03-26 Renmatix, Inc. Lignin production from lignocellulosic biomass
US8801859B2 (en) 2011-05-04 2014-08-12 Renmatix, Inc. Self-cleaning apparatus and method for thick slurry pressure control
US8933262B2 (en) 2011-05-24 2015-01-13 Basf Se Process for preparing polyisocyanates from biomass
US9790641B2 (en) 2011-05-24 2017-10-17 Liquid Lignin Company, Llc Process for treating lignin
EP2714650A1 (fr) 2011-05-24 2014-04-09 Basf Se Procédé de production de polyisocyanates à partir de biomasse
CA2864689C (fr) * 2011-05-24 2017-04-11 Liquid Lignin Company, Llc Procede de traitement de lignine
ES2658916T3 (es) 2011-06-22 2018-03-12 Valmet Aktiebolag Método de separación de lignina del licor negro que comprende múltiples etapas de acidificación
EP2726671B1 (fr) 2011-06-28 2016-04-27 Valmet AB Procédé de séparation de lignine pour la liqueur noire comprenant l'élimination de composés du soufre à partir de l'effluent aqueux formé
WO2013055785A1 (fr) 2011-10-10 2013-04-18 Virdia Ltd Compositions de sucre
US9175438B2 (en) 2011-11-11 2015-11-03 Valmet Ab Method for lignin separation from black liquor involving multiple acidification steps
US8759498B2 (en) 2011-12-30 2014-06-24 Renmatix, Inc. Compositions comprising lignin
DE102012102327B3 (de) * 2012-03-12 2013-08-01 Brandenburgische Technische Universität Cottbus Verfahren zur Herstellung von wasserunlöslichen Lignin-Agglomeraten
FI127010B (en) * 2012-08-24 2017-09-29 Upm Kymmene Corp Process for the recovery of low molecular weight lignin from a filtrate
DE102012112231B4 (de) * 2012-10-15 2014-05-28 Brandenburgische Technische Universität Cottbus-Senftenberg Verfahren zur Herstellung von säurebeständigen Biopolymer-Lignin-Membranen
BR112015017598B1 (pt) * 2013-01-24 2021-05-18 Valmet Ab método para produção de lignina de alta pureza
NZ629052A (en) 2013-03-15 2017-04-28 Renmatix Inc High purity lignin, lignin compositions, and higher structured lignin
FI20135842L (fi) 2013-08-19 2015-02-20 Valmet Technologies Oy Menetelmä ja järjestelmä ligniinin käsittelemiseksi
DE102013112499A1 (de) * 2013-11-13 2015-05-13 Brandenburgische Technische Universität Cottbus-Senftenberg Vorrichtung und Verfahren zur Agglomeration der Ablauge eines Cellulosegewinnungsprozesses
FI128419B (en) * 2014-01-13 2020-04-30 Upm Kymmene Corp A method for separating a lignocellulose particle fraction and a lignin particle fraction
FI127601B (en) * 2014-04-03 2018-10-15 Andritz Oy Process for handling beverage solution from a process for the extraction of lignin
FI126369B (en) * 2014-06-06 2016-10-31 Andritz Oy A method for using lignin extracted from black liquor as fuel for a lime kiln
FI126078B (fi) 2014-07-04 2016-06-15 Metsä Fibre Oy Menetelmä mustalipeän sisältämän ligniinin hyödyntämiseksi
EP3186326B1 (fr) 2014-09-26 2024-02-21 Renmatix, Inc. Compositions adhésives comprenant de la cellulose de type ii
EP3242871B1 (fr) 2015-01-07 2019-11-06 Virdia, Inc. Méthodes d'extraction et de conversion de sucres hémicellulosiques
FI126818B (en) 2015-02-06 2017-06-15 Valmet Technologies Oy A method for treating lignin-based material
FI128045B (en) * 2016-11-17 2019-08-30 Upm Kymmene Corp Method and apparatus for recovering chemicals from alkaline lignin material
CN108610490A (zh) * 2018-05-30 2018-10-02 谭亚 一种高值化木质素纯化方法
CN112335081B (zh) 2018-07-09 2024-04-09 日本制纸株式会社 铅蓄电池用有机防缩剂
JP6662423B1 (ja) * 2018-09-06 2020-03-11 日本製紙株式会社 リグニンを分離する方法
DE102018220946A1 (de) 2018-12-04 2020-06-04 Suncoal Industries Gmbh Partikelförmige Kohlenstoffmaterialien und Verfahren zu deren Auftrennung
EP3693508A1 (fr) 2019-02-08 2020-08-12 Scitech-service OY Procédé de purification de lignine
BR112021015310A2 (pt) 2019-02-21 2021-11-09 Suncoal Ind Gmbh Processo para a redução de odor de materiais de carbono particulados
BR102019011474A2 (pt) * 2019-06-03 2019-09-10 Suzano Papel E Celulose S A processos de extração de lignina do licor negro
US20230002433A1 (en) 2019-12-06 2023-01-05 Basf Se Method for preparation of lignin oligomers
EP3960816B1 (fr) 2020-08-25 2024-04-03 Indian Oil Corporation Limited Procédé de valorisation de flux de déchets de bioéthanol 2g
JP2023539604A (ja) 2020-08-26 2023-09-15 サンコール・インダストリーズ・ゲーエムベーハー 微細化改質粒状炭素材料及びそれを製造するための方法
US20240010792A1 (en) 2020-12-07 2024-01-11 Basf Se Aqueous lactam solution of lignin
WO2022136613A1 (fr) 2020-12-23 2022-06-30 Basf Se Composition de liant comprenant une ou plusieurs polyamines ainsi que de la 1,3-dihydroxyacétone, du glycolaldéhyde et/ou du glycéraldéhyde pour des articles composites
CA3203217A1 (fr) 2020-12-23 2022-06-30 Gereon Antonius SOMMER Composition de liant comprenant une ou des polyamines et de l'hydroxyacetone pour articles composites
US20240304821A1 (en) 2021-03-08 2024-09-12 Nippon Paper Industries Co., Ltd. Organic expander for lead storage batteries
SE2150839A1 (en) 2021-06-30 2022-12-31 Valmet Oy Method and system for producing lignin
WO2023095511A1 (fr) 2021-11-26 2023-06-01 日本製紙株式会社 Agent anti-retrait organique pour batteries au plomb-acide

Family Cites Families (60)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US664811A (en) 1899-09-13 1900-12-25 Lippy Mfg Company Screen or riddle for separators.
FR485412A (fr) * 1916-05-13 1918-01-09 Erik Oman Traitement des résidus de lessives de sulfites pour permettre leur réemploi
US2228976A (en) * 1936-07-11 1941-01-14 Mead Corp Molding material and method of producing the same
US2470764A (en) * 1943-09-23 1949-05-24 Dunbar Thomas Leonidas Method of treating waste sulfite liquor
US2464828A (en) * 1944-02-22 1949-03-22 West Virginia Pulp & Paper Co Method of producing lignin from black liquor
US2541058A (en) 1948-06-16 1951-02-13 Wood Conversion Co Processing of lignocellulose materials
US2541127A (en) * 1948-06-17 1951-02-13 Weyerhaeuser Timber Co Process for producing dehydroperillic acid
US2541059A (en) * 1948-06-17 1951-02-13 Weyerhaeuser Timber Co Process for producing lignin products
US2701255A (en) * 1949-07-29 1955-02-01 Weyerhaeuser Timber Co Organic products from lignocellulose
US2680113A (en) * 1949-12-22 1954-06-01 Svenska Cellulosaforeningens C Method of producing water-soluble products from black liquor lignin
US2623040A (en) * 1950-07-06 1952-12-23 West Virginia Pulp & Paper Co Method of coagulating colloidal lignates in aqueous dispersions
US2697701A (en) * 1951-02-09 1954-12-21 Weyerhaeuser Timber Co Fractionation of lignocellulose materials
US2727028A (en) * 1951-03-14 1955-12-13 Lignosol Chemicals Ltd Treatment of waste sulphite liquor and products thereof
US2849314A (en) * 1953-03-02 1958-08-26 Permanente Cement Company Process of treatment and products from waste sulfite liquors
US2772965A (en) * 1953-06-02 1956-12-04 Rayonier Inc Recovery of chemicals in wood pulp preparation
FR1112129A (fr) * 1953-11-19 1956-03-08 Inventa Ag Procédé pour la préparation de la lignine à partir des liqueurs noires
US2913310A (en) * 1956-05-14 1959-11-17 Crossett Chemical Company Chemical recovery process
US2994633A (en) * 1958-08-21 1961-08-01 Crossett Company Process for separating lignin solids from used neutral sulfite pulping liquors
US2976273A (en) * 1958-09-10 1961-03-21 West Virginia Pulp & Paper Co Treatment of kraft black liquor and product
US3048576A (en) * 1958-11-04 1962-08-07 West Virginia Pulp & Paper Co Continuous acidulation and coagulation of lignin in black liquor
US2997466A (en) * 1958-11-04 1961-08-22 West Virginia Pulp & Paper Co Decantation of lignin
US3038834A (en) * 1959-05-06 1962-06-12 Alfred M Thomsen Method of carbonizing spent cooking liquor from pulp making
US3095409A (en) * 1960-04-01 1963-06-25 Puget Sound Pulp & Timber Co Acid treated sulfonated lignin-containing material and process for the production thereof
US3130115A (en) * 1961-10-27 1964-04-21 Alfred M Thomsen Method of processing lignified cellulose
NL300131A (fr) * 1962-11-15
US3404063A (en) * 1964-12-28 1968-10-01 Owens Illinois Inc By-product recovery from kraft black liquor
US3428520A (en) * 1965-08-12 1969-02-18 Scott Paper Co Pulping process with lignin recovery
US3546200A (en) * 1968-06-18 1970-12-08 Union Camp Corp Lignin precipitation from black liquor in the presence of chloro,bromo or nitro containing hydrocarbons
US3806403A (en) * 1972-03-27 1974-04-23 Nyanza Inc Process for treating black liquor to precipitate organic materials therefrom
US3895996A (en) * 1972-08-01 1975-07-22 Betz Laboratories Beneficiation of lignin solutions and pulp mill wastes
US4007004A (en) * 1974-07-05 1977-02-08 Westvaco Corporation Dyestuff filler derived from kraft black liquor
CA1172808A (fr) * 1981-07-23 1984-08-21 Marc F. Beaupre Methode de recuperation du surplus des liqueurs servant a la fabrication du papier kraft
US4470876A (en) * 1982-07-22 1984-09-11 Beaupre Marc F Kraft overload recovery process
US4674597A (en) 1986-06-17 1987-06-23 Humphrey Denver L Tree climbing device
US4891070A (en) * 1987-04-13 1990-01-02 Westvaco Corporation Lignin amine salt as binder for aqueous printing ink composition
US4764597A (en) * 1987-06-15 1988-08-16 Westvaco Corporation Method for methylolation of lignin materials
FI883934A (fi) * 1987-08-27 1989-02-28 Holmens Bruk Ab Saett att genomfoera en sulfatcellulosaprocess och en anlaeggning foer genomfoering av saettet.
US5034094A (en) * 1987-11-06 1991-07-23 Kurple Kenneth R Method of converting inorganic materials from kraft pulping liquor into pulping chemicals without passing them through a recovery furnace
EP0364632A1 (fr) * 1988-10-17 1990-04-25 Zeneca Limited Récupération de la lignine
US5288857A (en) * 1988-12-12 1994-02-22 Ligno Tech Sweden Ab Lignin preparation and method for its manufacture
SE468717B (sv) 1988-12-12 1993-03-08 Holmens Bruk Ab Ligninpreparat och foerfarande foer dess framstaellning
CA1335976C (fr) * 1989-05-31 1995-06-20 Mahmoud Kamran Azarniouch Recuperation de naoh et d'autres produits a partir de liqueurs usees et d'effluents d'usines de blanchiment
US5096540A (en) * 1990-04-06 1992-03-17 Sell Nancy J Method for recycling sulfur dioxide from sulfite pulping liquors
FI102395B1 (fi) * 1991-11-26 1998-11-30 Ahlstrom Machinery Oy Menetelmä energian talteenottamiseksi selluprosessien jäteliemistä
US5635024A (en) * 1993-08-20 1997-06-03 Bountiful Applied Research Corporation Process for separating lignins and dissolved organic compounds from kraft spent liquor
JP3024526B2 (ja) 1995-10-11 2000-03-21 日本製紙株式会社 リグニン組成物、その製造方法及びそれを用いたセメント分散剤
FI961930A (fi) * 1996-05-07 1997-11-08 Ahlstrom Machinery Oy Menetelmä ja laitteisto alkalisen sellunvalmistusprosessin tehostamiseksi
TR199902246T2 (xx) * 1997-03-20 1999-12-21 Granit S.A. Aromatik polimerler i�eren alkali sol�syonlar�n�n haz�rlanmas� i�in y�ntem.
US5777086A (en) * 1997-05-12 1998-07-07 Thermo Fibergen, Inc. Method of recovering lignin from pulp and paper sludge
CA2345394A1 (fr) 1998-09-24 2000-03-30 Kenneth R. Kurple (Deceased) Procede de preparation de pate sans four de recuperation
US6589427B2 (en) * 2001-02-28 2003-07-08 Council Of Scientific & Industrial Research Process for treatment of mixture of spent wash from distillery and black liquor from pulp and paper industry
US20020129910A1 (en) * 2001-03-14 2002-09-19 Lightner Gene E. Separation of black liquor to produce lignins substantially free of sodium
EP1302529A1 (fr) * 2001-10-09 2003-04-16 Linde AG Séparation d'eau salée pendant la préparation de savon de tallol
US7189306B2 (en) * 2002-02-22 2007-03-13 Gervais Gibson W Process of treating lignocellulosic material to produce bio-ethanol
US20030221804A1 (en) * 2002-06-03 2003-12-04 Lightner Gene E. Lignins derived from black liquor
CA2452145A1 (fr) * 2003-06-03 2004-12-03 David Tarasenko Methode de production de pate et de lignine
FI117507B (fi) * 2004-07-09 2006-11-15 Kemira Oyj Menetelmä ligniinin poistamiseksi vedestä
SE0402201D0 (sv) * 2004-09-14 2004-09-14 Stfi Packforsk Ab Method for separating lignin from black liquor
US8172981B2 (en) * 2004-09-14 2012-05-08 Lignoboost Ab Separating lignin from black liquor by precipitation, suspension and separation
WO2007120091A1 (fr) * 2006-03-16 2007-10-25 Stfi-Packforsk Ab Procédé permettant de séparer du pentose polymérique d'un liquide/d'une suspension épaisse

Also Published As

Publication number Publication date
US8815052B2 (en) 2014-08-26
ES2368553T3 (es) 2011-11-18
EP1797236A1 (fr) 2007-06-20
EP1797236A4 (fr) 2010-04-28
EP1797236B1 (fr) 2011-06-15
WO2006038863A1 (fr) 2006-04-13
BRPI0517543A (pt) 2008-10-14
CA2580834A1 (fr) 2006-04-13
ATE513082T1 (de) 2011-07-15
PT1797236E (pt) 2011-08-31
JP2008516100A (ja) 2008-05-15
ZA200802400B (en) 2009-04-29
BRPI0517543B1 (pt) 2017-02-07
SE0402437D0 (sv) 2004-10-07
JP4887299B2 (ja) 2012-02-29
US20080051566A1 (en) 2008-02-28
CA2580834C (fr) 2013-10-01

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