WO2006039914A1 - Procede pour reduire le degagement de composes organiques volatils (cov) par le bois et les produits de fragmentation du bois ainsi que les materiaux a base de bois, fabriques a partir de ces derniers, en particulier les panneaux de bois agglomeres - Google Patents

Procede pour reduire le degagement de composes organiques volatils (cov) par le bois et les produits de fragmentation du bois ainsi que les materiaux a base de bois, fabriques a partir de ces derniers, en particulier les panneaux de bois agglomeres Download PDF

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Publication number
WO2006039914A1
WO2006039914A1 PCT/DE2005/001830 DE2005001830W WO2006039914A1 WO 2006039914 A1 WO2006039914 A1 WO 2006039914A1 DE 2005001830 W DE2005001830 W DE 2005001830W WO 2006039914 A1 WO2006039914 A1 WO 2006039914A1
Authority
WO
WIPO (PCT)
Prior art keywords
wood
strands
chips
treated
alkali
Prior art date
Application number
PCT/DE2005/001830
Other languages
German (de)
English (en)
Inventor
Edmone Roffael
Thomas Schneider
Brigitte Dix
Original Assignee
Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
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 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. filed Critical Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
Priority to DE502005010889T priority Critical patent/DE502005010889D1/de
Priority to AT05813055T priority patent/ATE495866T1/de
Priority to DE112005003170T priority patent/DE112005003170A5/de
Priority to PL05813055T priority patent/PL1799412T3/pl
Priority to EP05813055A priority patent/EP1799412B1/fr
Publication of WO2006039914A1 publication Critical patent/WO2006039914A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N1/00—Pretreatment of moulding material
    • B27N1/003—Pretreatment of moulding material for reducing formaldehyde gas emission
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/08—Moulding or pressing
    • B27N3/10—Moulding of mats
    • B27N3/12—Moulding of mats from fibres

Definitions

  • VOC volatile organic compounds
  • the invention relates to a process for reducing the emission of volatile organic compounds (VOCs) from wood and from wood pulp products such as wood shavings, wood strands, wood fibers and wood veneers, in particular from softwood, and from wood-based materials produced therefrom.
  • VOCs volatile organic compounds
  • the volatile organic compounds are classified according to their boiling point or vapor pressure as very volatile organic compounds (WOCs), volatile organic compounds (VOCs) and semi-volatile organic compounds (SVOCs).
  • WOCs very volatile organic compounds
  • VOCs volatile organic compounds
  • SVOCs semi-volatile organic compounds
  • To the volatile organic compounds (VVOC) include compounds having a boiling point below 50 0 C. These include formic acid and formaldehyde.
  • volatile organic compounds (VOC) are those volatile subsumed organics with boiling points between about 50 0 C and 260 0 C.
  • the VOCs include acetic acid and terpenes.
  • the VOC are air pollutants, certain VOC cause eg odor nuisance and can have toxicological effects on living things.
  • the VOCs are mainly derived from the ingredients (extractives) of the wood or its transformation products and, where appropriate, the degradation products of the main components of the wood (lignin, celluloses, hemicelluloses).
  • the VOCs include wood components such as ⁇ -pinene, ⁇ -pinene, ⁇ 3 -caren, which mainly escape from the wood of the coniferous trees.
  • Modification products of the ingredients include pentanal, hexanal, etc. From the hemicelluloses, acetic and formic acid can be formed.
  • softwoods contain ingredients (extractives) such as resins and fats, which lead to the formation of volatile organic terpene compounds and aldehydes such as pentanal and hexanal.
  • Hardwoods release mainly acetic and formic acid.
  • the chemical composition and amount of VOC depends on many factors, in particular the type of wood, the treatment of the wood, the storage period and the storage conditions of the wood or its shredded products, as well as from the drying conditions. Furthermore, in wood-based materials, the binder influences the emission of VOCs.
  • Volatile organic compounds can escape from the wood and the wood comminution products and wood-based materials produced therefrom.
  • wood materials made from wood chippings such as wood shavings, wood strands, wood fibers and wood veneers by known methods, volatile organic compounds are released during manufacture, after production and when used.
  • wood-based materials such as Oriented Strand Boards (OSB), which are mainly produced in Europe from mostly un-stored softwoods such as pine and Douglas fir, can still produce large amounts of volatile organic compounds after production.
  • OSB Oriented Strand Boards
  • the nature and extent of the emission of VOCs from wood-based materials is additionally determined, inter alia, by the type of wood and, in particular, by the production technology and the binder used.
  • PF resins alkaline curing phenol-formaldehyde resins
  • volatile organic compounds having unsaturated carbon-to-carbon bonds can react with the atmospheric oxygen under ambient conditions.
  • VOCs oxygen
  • O 2 oxygen
  • the wood shredded products or the wood-based materials odor-intensive compounds can be obtained. fertilize arise.
  • OSB Oriented Strand Boards
  • the odor can be particularly unpleasant and concise. This is particularly true when the wood, as is usually the case, is used without prior storage for wood-based material production.
  • VOC volatile organic compounds
  • the object is achieved in that wood and / or wood shredded products are treated with suitable chemical substances that react with the wood and / or the wood shred products, in particular with the moisture of the wood or with the water in the wood.
  • suitable chemical substances that react with the wood and / or the wood shred products, in particular with the moisture of the wood or with the water in the wood.
  • the adjusting by reaction with the wood moisture pH should be above 7, in particular above 9.
  • Possible suitable substances which cause such a reaction are bases such as sodium hydroxide (NaOH), basic salts such as sodium carbonate (Na 2 COs), sodium sulfite (Na 2 SO 3 ) and tri-sodium phosphate (Na 3 PO 4 ) , Even gases such as ammonia, which lead to pH values higher than 7 after a reaction with water, can be used for this purpose.
  • the pH can be adjusted due to a reaction of the alkali with the ingredients or free or liberated wood acids below the theoretically expected by reaction of the alkali with the moisture content of wood.
  • other agents well known to those skilled in the art may be used to effect an increase in the pH of the wood.
  • the treatment of the wood or its shredded products can be carried out for the production of wood-based materials before or after storage of the wood.
  • the lignocelluloses can be washed after the aforementioned treatment and before the gluing with water or with aqueous solutions.
  • the treatment is usually carried out at room temperature and under atmospheric pressure.
  • alkali such as sodium hydroxide
  • PF resins alkaline phenol-formaldehyde resins
  • Schmidt-Hellerau (1968) investigated the influence of the addition of a 50% sodium hydroxide solution to the binder immediately prior to gluing or after drying the shavings of the extractable sweet chestnut on the physical-technological properties of particleboard made from it (Schmidt-Hellerau , Ch., 1968: Possibilities for Improving the Quality of Phenolic Chipboards, Holz-Zentralblatt 94: 1327).
  • alkali in amounts up to 20% (based on wood) to the already alkaline PF resins had the aim to increase the alkali balance of the binder topipepuffem acids in the highly acidic Kastanienholzs Georgnen.
  • the alkali is added to the wood or wood chips before drying and gluing and not to the binder (e.g., phenolic resin).
  • the binder e.g., phenolic resin
  • Roffael and Parameswaran (1984) have beech wood with 6% ammonia solution at 100 0 C for 3 hours in an autoclave and then washed the chips until neutral. This treatment led to an increase in the nitrogen content in the wood and to the buffering of the acids contained therein as well as to a partial degradation of the hemicelluloses (Parameswaran, N. and Roffael, E., 1984: state of knowledge and investigation results on the effect of ammonia on wood chips. and Material 42: 327-333).
  • the wood or wood crushing products may be both conifers and hardwoods. Even mixtures of these two wood types are possible.
  • the wood shavings and strands of conifers come from.
  • the wood-based materials produced from the lignocellulose-containing materials can be chipboard, such as OSB.
  • the plates produced can be one or more layers. Furthermore, the other layers may also contain other lignocelluloses such as straw or bark.
  • binders include phenol-formaldehyde resin (PF resin), diisocyanate-based adhesive (PMDI), melamine-urea-phenol-formaldehyde resin (MUPF resin) and / or tannin-formaldehyde resin (TF resin), or a mixture thereof.
  • PF resin phenol-formaldehyde resin
  • PMDI diisocyanate-based adhesive
  • MUPF resin melamine-urea-phenol-formaldehyde resin
  • TF resin tannin-formaldehyde resin
  • the wood-based materials produced from the treated lignocellulose-containing materials may additionally be post-treated with alkali, such as sodium hydroxide, sodium sulfite, trisodium phosphate and sodium carbonate and mixtures thereof after production.
  • alkali such as sodium hydroxide, sodium sulfite, trisodium phosphate and sodium carbonate and mixtures thereof after production.
  • the aftertreatment can also be done by ammonia gas.
  • the method according to the invention can also include a further alkali treatment after drying.
  • the treatment according to the invention of the wood or of the wood shredded products can take place before or after storage of the wood.
  • the wood or the wood shredded products may optionally be washed with water or aqueous solutions.
  • the alkali compounds such as sodium hydroxide, sodium sulfite or sodium carbonate used to increase the pH can be applied or impregnated by spraying or by other known methods on the wood or the wood crushing products.
  • the value of the incorporated compound to increase the pH in a range of 0.1% to 2% solids on atro chips.
  • the invention aims to develop a simple method for reducing the release of volatile organic compounds (VOC) from wood and wood chippings and from wood-based materials produced therefrom.
  • VOC volatile organic compounds
  • the core and sapwood strands were sprayed in one case with 2% sodium sulfite solution and in another case with 2% sodium hydroxide solution.
  • the dosage of sodium sulfite or sodium hydroxide was in each case at 1, 5% solids based on absolutely dry (atro) strands.
  • the treated strands were air dried without being washed. As a reference served on the air dried untreated core and sapwood strands of pine.
  • VOC volatile organic compounds
  • Table 2 Influence of treatment of pine core and sapwood strands (Pinus sylvestris L) with sodium sulphite (1.5% solids on dry beach) on the concentrations ( ⁇ g / m 3 ) of volatile organic compounds (VOC) after 5 h , 24 h and 48 h in a 23 liter test chamber at 23 ° C and 50% relative humidity (degree of loading: 0.5 m 2 / m 3 , air exchange rate: 0.5 h "1 )
  • part of the core and sapwood strands were treated with sodium hydroxide solution.
  • the treatment was carried out by first loading the strands in a gluing drum with 7.5% sodium hydroxide solution (dosage 1.5% solids based on absolutely dry (atro) strands). Subsequently, the strands were dried in a drying oven at a temperature of 5O 0 C to a moisture content of about 6%.
  • the untreated core or sapwood strands were each precoated in a gluing drum with an amount of water corresponding to the above-mentioned sodium hydroxide solution dosage. Subsequently, the strands were dried in a drying oven at a temperature of 5O 0 C to a moisture content of about 6%.
  • OSB Oriented Strand Boards
  • VOC emissions were determined after storage for 24 hours in a 1 m 3 test chamber at 23 ° C and 50% relative humidity.
  • the loading level of the test chamber was 0.5 ⁇ rVm 3
  • the air exchange rate was 0.5 h-1.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Debarking, Splitting, And Disintegration Of Timber (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)

Abstract

L'invention concerne un procédé pour réduire l'émission de composés organiques volatils (COV) par le bois et les produits de fragmentation du bois, tels que les copeaux de bois, les copeaux de bois longs, les fibres de bois et les feuilles de placage, en particulier en bois de résineux, ainsi que les matériaux à base de bois, fabriqués à partir de ces derniers.
PCT/DE2005/001830 2004-10-15 2005-10-12 Procede pour reduire le degagement de composes organiques volatils (cov) par le bois et les produits de fragmentation du bois ainsi que les materiaux a base de bois, fabriques a partir de ces derniers, en particulier les panneaux de bois agglomeres WO2006039914A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE502005010889T DE502005010889D1 (de) 2004-10-15 2005-10-12 Verfahren zur verminderung der abgabe von flüchtigzzerkleinerungsprodukten und aus daraus hergestellten holzwerkstoffen, insbesondere holzspanplatten
AT05813055T ATE495866T1 (de) 2004-10-15 2005-10-12 Verfahren zur verminderung der abgabe von flüchtigen organischen verbindungen (voc) aus holz und holzzerkleinerungsprodukten und aus daraus hergestellten holzwerkstoffen, insbesondere holzspanplatten
DE112005003170T DE112005003170A5 (de) 2004-10-15 2005-10-12 Verfahren zur Verminderung der Abgabe von Flüchtigen organischen Verbindungen (VOC) aus Holz und Holzzerkleinerungsprodukten und aus daraus hergestellten Holzwerkstoffen, insbesondere Holzspanplatten
PL05813055T PL1799412T3 (pl) 2004-10-15 2005-10-12 Sposób zmniejszania uwalniania lotnych związków organicznych (LZO) z produktów z drewna i wiórów drewnianych, oraz pochodzących od nich materiałów drewnianych, w szczególności płyt wiórowych
EP05813055A EP1799412B1 (fr) 2004-10-15 2005-10-12 Procede pour reduire le degagement de composes organiques volatils (cov) par le bois et les produits de fragmentation du bois ainsi que les materiaux a base de bois, fabriques a partir de ces derniers, en particulier les panneaux de bois agglomeres

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004050406.7 2004-10-15
DE102004050406 2004-10-15

Publications (1)

Publication Number Publication Date
WO2006039914A1 true WO2006039914A1 (fr) 2006-04-20

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Application Number Title Priority Date Filing Date
PCT/DE2005/001830 WO2006039914A1 (fr) 2004-10-15 2005-10-12 Procede pour reduire le degagement de composes organiques volatils (cov) par le bois et les produits de fragmentation du bois ainsi que les materiaux a base de bois, fabriques a partir de ces derniers, en particulier les panneaux de bois agglomeres

Country Status (5)

Country Link
EP (1) EP1799412B1 (fr)
AT (1) ATE495866T1 (fr)
DE (1) DE502005010889D1 (fr)
PL (1) PL1799412T3 (fr)
WO (1) WO2006039914A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009156258A1 (fr) * 2008-06-27 2009-12-30 BAM Bundesanstalt für Materialforschung und -prüfung Procédé pour réduire les émissions (réduction des aldéhydes) du bois et des matériaux en bois par introduction d'un agent de conservation contenant de la colle et/ou des antioxydants
DE102009046127A1 (de) 2008-10-28 2010-04-29 Institut Für Holztechnologie Dresden Gemeinnützige Gmbh Verfahren zur Herstellung von Holzfaserwerkstoffen sowie Holzfaserwerkstoffe mit verringerter Emission an flüchtigen VOC
DE102011104025A1 (de) 2010-06-11 2011-12-15 Technische Universität Dresden Verfahren zur Modifizierung von Holz oder Holzwerkstoffen sowie chemisch und thermisch modifiziertes Holz
DE102012020842A1 (de) 2012-10-24 2014-04-24 Fritz Egger Gmbh & Co. Og Verfahren zur Herstellung eines Holzwerkstoffs
DE102013001678A1 (de) 2013-01-31 2014-07-31 INNOLYSIA GbR (vertretungsberechtigte Gesellschafterin: Virginie Soua, 53639 Königswinter) Reduzierung der Schadstoffemission von Holzwerkstoffen
DE102014114921A1 (de) 2013-10-14 2015-04-16 Hochschule für Nachhaltige Entwicklung Eberswalde Verfahren zur Herstellung eines emissionsreduzierten Massivholzproduktes oder eines emissionsreduzierten, holzhaltigen Ausgangsstoffes sowie emissionsreduzierte Massivholzprodukte oder emissionsreduzierte, holzhaltige Ausgangsstoffe
WO2019117799A1 (fr) * 2017-12-15 2019-06-20 Nsr Ab Panneau de particules avec résine hybride
EP4023812A1 (fr) 2020-12-29 2022-07-06 MM BOARD & PAPER GmbH Procédé de fabrication de produits à base de bois en tant que matière première

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0096797A2 (fr) * 1982-06-12 1983-12-28 BASF Aktiengesellschaft Procédé de fabrication de matériaux en copeaux de bois, avec une émission réduite de formaldéhyde
US4514255A (en) * 1983-08-19 1985-04-30 Borden, Inc. Process for the manufacture of dried, resin-treated fiber furnish
DD242193A1 (de) * 1985-11-06 1987-01-21 Univ Dresden Tech Verfahren zur erzeugung von holzwerkstoffen
US4678686A (en) * 1986-04-15 1987-07-07 Park David W Treatment of formaldehyde-containing wood panel products
CA1269602A (fr) * 1984-09-18 1990-05-29 Raymond A. Young Systeme adhesif de polymere cellulosique active par une base
US5028299A (en) * 1987-06-23 1991-07-02 Gilbert Guidat Installation for the continuous-flow production of stabilized chips or particles derived from wood waste
WO1993025358A1 (fr) * 1992-06-11 1993-12-23 Sunds Defibrator Industries Aktiebolag Fabrication de panneau de fibres
EP0639434A1 (fr) * 1993-08-18 1995-02-22 Fraunhofer-Gesellschaft Zur Förderung Der Angewandten Forschung E.V. Procédé de fabrication de panneaux de moyenne densité en fibres de bois (MDF)
EP1266730A1 (fr) * 2001-06-12 2002-12-18 Akzo Nobel N.V. Procédé de fabrication des panneaux de fibres résistant à l'humidité
DE10160316A1 (de) * 2001-12-07 2003-06-26 Ihd Inst Fuer Holztechnologie Verfahren zur Herstellung von Faserplatten mit erhöhter Feuchtebeständigkeit nach dem Trockenverfahren
US20040028934A1 (en) * 2000-04-14 2004-02-12 Preston Alan F. Methods of incorporating treatment agents into wood based composite products

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0096797A2 (fr) * 1982-06-12 1983-12-28 BASF Aktiengesellschaft Procédé de fabrication de matériaux en copeaux de bois, avec une émission réduite de formaldéhyde
US4514255A (en) * 1983-08-19 1985-04-30 Borden, Inc. Process for the manufacture of dried, resin-treated fiber furnish
CA1269602A (fr) * 1984-09-18 1990-05-29 Raymond A. Young Systeme adhesif de polymere cellulosique active par une base
DD242193A1 (de) * 1985-11-06 1987-01-21 Univ Dresden Tech Verfahren zur erzeugung von holzwerkstoffen
US4678686A (en) * 1986-04-15 1987-07-07 Park David W Treatment of formaldehyde-containing wood panel products
US5028299A (en) * 1987-06-23 1991-07-02 Gilbert Guidat Installation for the continuous-flow production of stabilized chips or particles derived from wood waste
WO1993025358A1 (fr) * 1992-06-11 1993-12-23 Sunds Defibrator Industries Aktiebolag Fabrication de panneau de fibres
EP0639434A1 (fr) * 1993-08-18 1995-02-22 Fraunhofer-Gesellschaft Zur Förderung Der Angewandten Forschung E.V. Procédé de fabrication de panneaux de moyenne densité en fibres de bois (MDF)
US20040028934A1 (en) * 2000-04-14 2004-02-12 Preston Alan F. Methods of incorporating treatment agents into wood based composite products
EP1266730A1 (fr) * 2001-06-12 2002-12-18 Akzo Nobel N.V. Procédé de fabrication des panneaux de fibres résistant à l'humidité
DE10160316A1 (de) * 2001-12-07 2003-06-26 Ihd Inst Fuer Holztechnologie Verfahren zur Herstellung von Faserplatten mit erhöhter Feuchtebeständigkeit nach dem Trockenverfahren

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009156258A1 (fr) * 2008-06-27 2009-12-30 BAM Bundesanstalt für Materialforschung und -prüfung Procédé pour réduire les émissions (réduction des aldéhydes) du bois et des matériaux en bois par introduction d'un agent de conservation contenant de la colle et/ou des antioxydants
DE102009046127A1 (de) 2008-10-28 2010-04-29 Institut Für Holztechnologie Dresden Gemeinnützige Gmbh Verfahren zur Herstellung von Holzfaserwerkstoffen sowie Holzfaserwerkstoffe mit verringerter Emission an flüchtigen VOC
DE102011104025A1 (de) 2010-06-11 2011-12-15 Technische Universität Dresden Verfahren zur Modifizierung von Holz oder Holzwerkstoffen sowie chemisch und thermisch modifiziertes Holz
DE102012020842A1 (de) 2012-10-24 2014-04-24 Fritz Egger Gmbh & Co. Og Verfahren zur Herstellung eines Holzwerkstoffs
WO2014064209A1 (fr) 2012-10-24 2014-05-01 Fritz Egger Gmbh & Co. Og Procédé de production d'un matériau dérivé du bois
DE102013001678A1 (de) 2013-01-31 2014-07-31 INNOLYSIA GbR (vertretungsberechtigte Gesellschafterin: Virginie Soua, 53639 Königswinter) Reduzierung der Schadstoffemission von Holzwerkstoffen
DE102014114921A1 (de) 2013-10-14 2015-04-16 Hochschule für Nachhaltige Entwicklung Eberswalde Verfahren zur Herstellung eines emissionsreduzierten Massivholzproduktes oder eines emissionsreduzierten, holzhaltigen Ausgangsstoffes sowie emissionsreduzierte Massivholzprodukte oder emissionsreduzierte, holzhaltige Ausgangsstoffe
WO2019117799A1 (fr) * 2017-12-15 2019-06-20 Nsr Ab Panneau de particules avec résine hybride
EP4023812A1 (fr) 2020-12-29 2022-07-06 MM BOARD & PAPER GmbH Procédé de fabrication de produits à base de bois en tant que matière première
WO2022144377A1 (fr) 2020-12-29 2022-07-07 Mm Board & Paper Gmbh Procédé de production de produits à base de bois en tant que matière première
WO2022144176A1 (fr) 2020-12-29 2022-07-07 Mm Board & Paper Gmbh Procédé de production de produits à base de bois en tant que matière première

Also Published As

Publication number Publication date
ATE495866T1 (de) 2011-02-15
EP1799412B1 (fr) 2011-01-19
DE502005010889D1 (de) 2011-03-03
EP1799412A1 (fr) 2007-06-27
PL1799412T3 (pl) 2011-06-30

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