EP0318528B1 - Procede de traitement de bois vert - Google Patents

Procede de traitement de bois vert Download PDF

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Publication number
EP0318528B1
EP0318528B1 EP88903339A EP88903339A EP0318528B1 EP 0318528 B1 EP0318528 B1 EP 0318528B1 EP 88903339 A EP88903339 A EP 88903339A EP 88903339 A EP88903339 A EP 88903339A EP 0318528 B1 EP0318528 B1 EP 0318528B1
Authority
EP
European Patent Office
Prior art keywords
wood
drying
moisture
earth metal
spraying
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.)
Expired - Lifetime
Application number
EP88903339A
Other languages
German (de)
English (en)
Other versions
EP0318528A1 (fr
Inventor
György ERDÖSI
László BALINT
Péter OSVATH
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.)
Agaton Sa Te Fribourg Zwitserland
Original Assignee
TOP-COOP IDEGENFORGALMI ES VENDEGLATOIPARI KISSZOEVETKEZET
Top-Coop Idegenforgalmi es Vendeglatoipari Kisszovetkezet
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 TOP-COOP IDEGENFORGALMI ES VENDEGLATOIPARI KISSZOEVETKEZET, Top-Coop Idegenforgalmi es Vendeglatoipari Kisszovetkezet filed Critical TOP-COOP IDEGENFORGALMI ES VENDEGLATOIPARI KISSZOEVETKEZET
Priority to AT88903339T priority Critical patent/ATE65206T1/de
Publication of EP0318528A1 publication Critical patent/EP0318528A1/fr
Application granted granted Critical
Publication of EP0318528B1 publication Critical patent/EP0318528B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
    • B27K3/16—Inorganic impregnating agents
    • B27K3/18—Compounds of alkaline earth metals
    • 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
    • B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
    • B27K3/16—Inorganic impregnating agents
    • B27K3/32—Mixtures of different inorganic impregnating agents
    • 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

Definitions

  • the invention relates to a method for treating fresh wood, in the course of which the wood prepared for drying, e.g. Lumber, is dried in a drying room in a known manner at a temperature between 40 ° C and 100 ° C to at least 30% moisture content.
  • the aim of the process according to the invention is to remedy the deficiencies mentioned and to create a drying process which, in comparison with the previous drying methods, reduces the wood deformations, shape and dimension deviations, the tensions remaining therein and the duration of the drying process to an acceptable minimum.
  • Part of the gases in the air combine in the course of a reaction to form oxide, which converts to acid in the water and is able to release the alkaline earth metal built in during the growth of the wood, if we add a salt thereof with a distilled aqueous one Use the solution as a catalyst to accelerate the effect of this acid.
  • the process is therefore a "laboratory" imitation of the natural drying process, i.e. an artificial maximum acceleration of all known environmental effects.
  • the essence of the invention is that a nitric acid is mixed into the distilled aqueous solution of the alkali metal salt and the mixture thus obtained is injected into the drying room at least once. With this spray, the hard pectin is loosened, which is in the fibers of the wood and hinders the removal of moisture, whereby the alkali earth metal builds up between the wood fibers.
  • the composition of the mixture to be injected is as follows: nitric acid (HNO3) 42-48% by weight, distilled water (H2O) 42-48% by weight, alkali metal salt, e.g. Calcium chloride (CaCl2) 4-16% by weight.
  • concentration of the nitric acid can be between 65-96%.
  • This process enables the dry wood obtained in the course of the artificial drying process carried out in a few days to have the same properties as the wood naturally dried in a few years.
  • This method also enables the material to be made plasticizable and machinable without cutting (e.g. bendable, rotatable, compressible, stretchable, can be broken down into fibers, etc.) by reinforcing the natural chemical process, with relatively low wood moisture, and thus it can during growth be shaped almost like a living tree within the known limits or while maintaining most of its value.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

Selon un procédé de traitement de bois fraîchement coupé, au cours duquel le bois brut, par example du bois scié, préparé pour le séchage, est séché de manière connue dans une chambre de séchage à une température comprise entre 40°C et 100°C jusqu'à atteindre une teneur en humidité d'au moins 30 %, on ajoute de l'acide nitrique à une solution d'un sel d'un métal alcalino-terreux dans de l'eau distillée et on pulvérise au moins une fois la solution ainsi obtenue dans la chambre de séchage. Ce produit ainsi pulvérisé ramollit la pectine dure des fibres du bois qui empêche l'humidité de s'échapper, le sel du métal alcalino-terreux s'incorporant en même temps entre les fibres du bois.

Claims (6)

1. Procédure pour le traitement de bois vert, en cours de laquelle le bois brut, p.ex. bois de sciage, préparé pour le sèchement dans une salle de séchage sèche selon la manière connue, à une température de 40°C à 100°C jusqu'à ce qu'il attende un pourcentage d'humidité d'au moins 30%, procédure caractérisée en ce qu'on mélange à une solution aqueuse distillée d'un métal alcalino-terreux de l'acide azotique et le mélange ainsi reçu est aspergé au moins une fois dans la salle de séchage, cet agent d'aspersion ramollant la pectine dure se trouvant dans les fibres du bois et empêchant l'échappement de l'humidité tandis que le métal alcanico-terreux s'insert parmi les fibres du bois.
2. Procédure selon revendication 1, caractérisée en ce que la composition du mélange à asperger soit choisie comme suit: de l'acide azotique (HNO₃) avec un pourcentage pondéral de 42-48, de l'eau distillée (H₂O) avec un pourcentage pondéral de 42-48, du sel du métal alcalin, p. ex. chlorure de calcium, avec un pourcentage pondéral de 4-16.
3. Procédure selon revendication 1 ou 2, caractérisée en ce que la concentration de l'acide azotique soit formée entre 65% et 96%.
4. Procédure selon une des revendications 1 à 3, caractérisée en ce que l'humidité du bois  ―  selon l'espèce de bois  ―  soit ajustée entre 18% et 30% avant l'aspersion.
5. Procédure selon une des revendications 1 à 4, caractérisée en ce qu'après l'aspersion la température à l'intérieur de la salle de séchage soit maintenue à une valeur s'élevant entre 40°C et 100°C lors du séchage.
6. Procédure selon une des revendications 1 à 5, caractérisée en ce que  ―  selon l'espèce de bois  ―  l'aspersion soit faite pendant une durée de 2 à 15 minutes, le nombre des cycles de l'aspersion étant choisi  ―  selon l'espèce de bois  ―  entre 1 et 10.
EP88903339A 1987-05-04 1988-04-20 Procede de traitement de bois vert Expired - Lifetime EP0318528B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88903339T ATE65206T1 (de) 1987-05-04 1988-04-20 Verfahren zur behandlung von frischholz.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
HU871983A HU199088B (en) 1987-05-04 1987-05-04 Method for treating raw timbers
HU198387 1987-05-04

Publications (2)

Publication Number Publication Date
EP0318528A1 EP0318528A1 (fr) 1989-06-07
EP0318528B1 true EP0318528B1 (fr) 1991-07-17

Family

ID=10957150

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88903339A Expired - Lifetime EP0318528B1 (fr) 1987-05-04 1988-04-20 Procede de traitement de bois vert

Country Status (9)

Country Link
US (1) US4977686A (fr)
EP (1) EP0318528B1 (fr)
BR (1) BR8807042A (fr)
CS (1) CS277182B6 (fr)
DD (1) DD272628A1 (fr)
HU (1) HU199088B (fr)
PL (1) PL155814B1 (fr)
RO (1) RO105398B1 (fr)
WO (1) WO1988008780A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0206970D0 (en) * 2002-03-25 2002-05-08 Nutrel Products Ltd Delivery system
FI20041448A0 (fi) * 2004-11-10 2004-11-10 Tekmawood Oy Puutavaran suojausmenetelmä ja -laitteisto
JP2011189515A (ja) * 2010-03-11 2011-09-29 Olympus Corp 圧縮木製品の製造方法
DE102013223415A1 (de) * 2013-11-15 2015-05-21 Holzwerke Gmach GmbH Verfahren zur künstlichen Holzalterung

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1855666A (en) * 1930-04-12 1932-04-26 Leo P Curtin Process of preserving wood
US2500954A (en) * 1947-03-04 1950-03-21 Us Agriculture Method involving the use of chemicals for increasing the drying rate of wood
CH485616A (de) * 1964-02-13 1970-02-15 Lonza Werke Gmbh Verfahren zur Herstellung von keramisch gebundenen feuerfesten Körpern
DE2460392A1 (de) * 1974-12-20 1976-06-24 Wilke Klaus Diether Verfahren zur herstellung von nichtbrennbaren holzspanplatten

Also Published As

Publication number Publication date
CS8802854A2 (en) 1991-07-16
RO105398B1 (ro) 1994-12-21
PL155814B1 (en) 1992-01-31
PL272246A1 (en) 1989-05-16
US4977686A (en) 1990-12-18
DD272628A1 (de) 1989-10-18
CS277182B6 (en) 1992-12-16
HU199088B (en) 1990-01-29
BR8807042A (pt) 1989-10-03
EP0318528A1 (fr) 1989-06-07
WO1988008780A1 (fr) 1988-11-17

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