EP0623433A1 - Procédé de valorisation de bois de basse qualité - Google Patents

Procédé de valorisation de bois de basse qualité Download PDF

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Publication number
EP0623433A1
EP0623433A1 EP94201159A EP94201159A EP0623433A1 EP 0623433 A1 EP0623433 A1 EP 0623433A1 EP 94201159 A EP94201159 A EP 94201159A EP 94201159 A EP94201159 A EP 94201159A EP 0623433 A1 EP0623433 A1 EP 0623433A1
Authority
EP
European Patent Office
Prior art keywords
sections
temperature
stage
wood
range
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
EP94201159A
Other languages
German (de)
English (en)
Other versions
EP0623433B1 (fr
Inventor
Herman Petrus Ruyter
Peter Arnoldy
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Plato Beheer BV
Original Assignee
Shell Internationale Research Maatschappij BV
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 Shell Internationale Research Maatschappij BV filed Critical Shell Internationale Research Maatschappij BV
Publication of EP0623433A1 publication Critical patent/EP0623433A1/fr
Application granted granted Critical
Publication of EP0623433B1 publication Critical patent/EP0623433B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K5/00—Treating of wood not provided for in groups B27K1/00, B27K3/00
    • B27K5/001—Heating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
    • B27K5/00—Treating of wood not provided for in groups B27K1/00, B27K3/00
    • B27K5/06—Softening or hardening of wood
    • 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

Definitions

  • the invention relates to a process for upgrading low-quality wood to high-quality wood in an environmentally sound way, and to high-quality wood obtained by means of this process.
  • Such a process is known from EP 0373726.
  • This process uses traditional ways of heating and drying the wood. These methods rely on thermal conduction to raise the temperature of the wood and evaporate water contained therein. The poor thermal conductivity of wood and the sensitivity of the process chemistry to extended heating times, result in limitations on product thickness and quality for such process. Furthermore, it has been found that gradients in temperature, pressure and moisture concentration induce stresses in wood, which may result in the formation of cracks and consequent loss of mechanical strength. Hence it can be concluded that there is need for a process for upgrading low-quality wood which allows the processing of sizable sections of low-quality wood.
  • aqueous medium in the presence of which the softening of the low-quality wood is conducted, includes an aqueous pH buffer.
  • the alkali metal component of said salt is preferably sodium or potassium.
  • Earth alkaline metal salts such as magnesium and/or calcium salts may also be used.
  • the buffering agent is dissolved in the aqueous medium wherein the concentration of the buffering agent is suitably in the range of from 0.01 to 2 mol/litre and preferably from 0.05 to 1.0 mol/litre.
  • the concentration of buffer is considered to be the concentration of the acid (or base), together with the concentration of the salt.
  • the term "mould”, wherein the dewatered softened wood is to be cured, should be interpreted to also include a platen press equipped with spacers and further auxiliary equipment, wherein regularly shaped, softened sections are placed next to one another for curing. Should the dimensions of the ultimate desired composite be such that it can not be directly obtained from a single softened section, this can be remedied by employing a mould having the required dimensions and introducing therein a sufficient number of softened sections and cure them together to provide the desired composite.
  • Table 1 Na acetate g/l 6 0.6 - Initial pH 7.9 7 6.6 Ultimate pH 5 4 3 Density, g/cm3 ( ⁇ ) 0.7 0.7 0.7 Shore D hardness units 70 65 30 Bending strength, MPa ( ⁇ ) 125 115 60 Specific bending strength ( ⁇ / ⁇ ) 175 165 85 From the data collected in Table 1 it can be observed that the mechanical performance properties of the composites prepared according to the process of the present invention are far superior to those prepared according to a process outside the scope of the present invention.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
EP94201159A 1993-04-29 1994-04-27 Procédé de valorisation de bois de basse qualité Expired - Lifetime EP0623433B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP93201237 1993-04-29
EP93201237 1993-04-29

Publications (2)

Publication Number Publication Date
EP0623433A1 true EP0623433A1 (fr) 1994-11-09
EP0623433B1 EP0623433B1 (fr) 1996-08-28

Family

ID=8213807

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94201159A Expired - Lifetime EP0623433B1 (fr) 1993-04-29 1994-04-27 Procédé de valorisation de bois de basse qualité

Country Status (5)

Country Link
EP (1) EP0623433B1 (fr)
AT (1) ATE141851T1 (fr)
DE (1) DE69400417T2 (fr)
DK (1) DK0623433T3 (fr)
ES (1) ES2091087T3 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2751580A1 (fr) * 1996-07-26 1998-01-30 N O W New Option Wood Procede de retification du bois
NL2000405C2 (nl) * 2006-12-22 2008-06-24 Willems Holding B V W Werkwijze voor het verduurzamen van hout, houtproduct en inrichting daarvoor.
DE102009047137A1 (de) 2009-11-25 2011-05-26 Institut Für Holztechnologie Dresden Gemeinnützige Gmbh Verfahren zur thermischen Modifizierung oder Vergütung von Holz und Holzprodukten
EP2476526A1 (fr) * 2001-08-01 2012-07-18 Kronoplus Technical AG Plaque MDF et fabrication
CN103753661A (zh) * 2014-01-17 2014-04-30 华南农业大学 一种桉木指接地板的制备方法
EP2707184A4 (fr) * 2011-05-10 2015-03-25 Stora Enso Oyj Procédé pour le traitement du bois par imprégnation à l'acide citrique puis par chauffage à haute température
CN104960052A (zh) * 2015-05-28 2015-10-07 阜南县金威工艺品有限公司 一种柳条软化方法
DE102015013450A1 (de) 2015-10-16 2016-04-14 Daimler Ag Verfahren zum Herstellen eines Holzzierteils
CN105946068A (zh) * 2016-05-19 2016-09-21 安徽德润工艺品有限公司 一种藤条软化处理方法
CN106272815A (zh) * 2016-08-27 2017-01-04 安徽省阜南志峰工艺品有限公司 一种用于编织狗舍的杞柳处理方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011104025A1 (de) 2010-06-11 2011-12-15 Technische Universität Dresden Verfahren zur Modifizierung von Holz oder Holzwerkstoffen sowie chemisch und thermisch modifiziertes Holz

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0197674A1 (fr) * 1985-03-15 1986-10-15 Peter Favot Procédé pour densifier des bois de basse densité
EP0373725A2 (fr) * 1988-12-16 1990-06-20 Shell Internationale Researchmaatschappij B.V. Agrégat fibreux cellulosique et procédé pour sa préparation

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2073429T3 (es) * 1988-12-16 1995-08-16 Shell Int Research Agregado fibroso celulosico y un procedimiento para su preparacion.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0197674A1 (fr) * 1985-03-15 1986-10-15 Peter Favot Procédé pour densifier des bois de basse densité
EP0373725A2 (fr) * 1988-12-16 1990-06-20 Shell Internationale Researchmaatschappij B.V. Agrégat fibreux cellulosique et procédé pour sa préparation

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2751580A1 (fr) * 1996-07-26 1998-01-30 N O W New Option Wood Procede de retification du bois
WO1998004393A1 (fr) * 1996-07-26 1998-02-05 Now (New Option Wood) Procede de retification du bois
US5901463A (en) * 1996-07-26 1999-05-11 N O W (New Option Wood)--societe anonyme Wood curing method
EP2476526A1 (fr) * 2001-08-01 2012-07-18 Kronoplus Technical AG Plaque MDF et fabrication
WO2008079000A1 (fr) * 2006-12-22 2008-07-03 Firmowood Nederland B.V. Procédé et appareil pour conserver le bois, et produit en bois
JP2010513085A (ja) * 2006-12-22 2010-04-30 ファーモウッド ネーデルランド ベスローテン フェンノートシャップ 木材および木材製品の保存方法と装置
US20100143739A1 (en) * 2006-12-22 2010-06-10 Firmowood Nederland B.V. Method and apparatus for preserving wood, and wood product
NL2000405C2 (nl) * 2006-12-22 2008-06-24 Willems Holding B V W Werkwijze voor het verduurzamen van hout, houtproduct en inrichting daarvoor.
US8465845B2 (en) 2006-12-22 2013-06-18 Firmowood Nederland B.V. Method and apparatus for preserving wood, and wood product
DE102009047137A1 (de) 2009-11-25 2011-05-26 Institut Für Holztechnologie Dresden Gemeinnützige Gmbh Verfahren zur thermischen Modifizierung oder Vergütung von Holz und Holzprodukten
EP2707184A4 (fr) * 2011-05-10 2015-03-25 Stora Enso Oyj Procédé pour le traitement du bois par imprégnation à l'acide citrique puis par chauffage à haute température
CN103753661A (zh) * 2014-01-17 2014-04-30 华南农业大学 一种桉木指接地板的制备方法
CN103753661B (zh) * 2014-01-17 2016-06-15 华南农业大学 一种桉木指接地板的制备方法
CN104960052A (zh) * 2015-05-28 2015-10-07 阜南县金威工艺品有限公司 一种柳条软化方法
DE102015013450A1 (de) 2015-10-16 2016-04-14 Daimler Ag Verfahren zum Herstellen eines Holzzierteils
CN105946068A (zh) * 2016-05-19 2016-09-21 安徽德润工艺品有限公司 一种藤条软化处理方法
CN106272815A (zh) * 2016-08-27 2017-01-04 安徽省阜南志峰工艺品有限公司 一种用于编织狗舍的杞柳处理方法

Also Published As

Publication number Publication date
EP0623433B1 (fr) 1996-08-28
DK0623433T3 (da) 1996-09-16
ATE141851T1 (de) 1996-09-15
DE69400417T2 (de) 1997-02-13
DE69400417D1 (de) 1996-10-02
ES2091087T3 (es) 1996-10-16

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