EP0148141A1 - Méthode de traitement de bois imprégné à la créosote pour réduire considérablement ou éviter le ressuage - Google Patents

Méthode de traitement de bois imprégné à la créosote pour réduire considérablement ou éviter le ressuage Download PDF

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Publication number
EP0148141A1
EP0148141A1 EP84850383A EP84850383A EP0148141A1 EP 0148141 A1 EP0148141 A1 EP 0148141A1 EP 84850383 A EP84850383 A EP 84850383A EP 84850383 A EP84850383 A EP 84850383A EP 0148141 A1 EP0148141 A1 EP 0148141A1
Authority
EP
European Patent Office
Prior art keywords
wood
treatment
creosote
vacuum
impregnated wood
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
EP84850383A
Other languages
German (de)
English (en)
Other versions
EP0148141B1 (fr
Inventor
Emil Akerlund
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.)
SVENSKA TRAEIMPREGNERINGS AKTIEBOLAGET SUECIA TE M
Original Assignee
Svenska Traimpregnerings Suecia AB
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 Svenska Traimpregnerings Suecia AB filed Critical Svenska Traimpregnerings Suecia AB
Priority to AT84850383T priority Critical patent/ATE27784T1/de
Publication of EP0148141A1 publication Critical patent/EP0148141A1/fr
Application granted granted Critical
Publication of EP0148141B1 publication Critical patent/EP0148141B1/fr
Expired 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
    • B27K5/007—Treating of wood not provided for in groups B27K1/00, B27K3/00 using pressure
    • B27K5/0075—Vacuum
    • 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
    • B27K3/02—Processes; Apparatus
    • B27K3/0278—Processes; Apparatus involving an additional treatment during or after impregnation
    • 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
    • B27K3/34—Organic impregnating agents
    • B27K3/44—Tar; Mineral oil
    • 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

Definitions

  • This invention relates to treatment of creosote impregnated wood and especially to a method of treatment thereof to substantially reduce or avoid bleeding.
  • Impregnation of wood, such as telegraph poles, electric power transmission poles, piles, sleepers etc, with creosote oil is the method used most frequently at present for protecting the wood from attacks by mould fungi and other organisms as well as vermin.
  • the creosote oil is the impregnating agent mostly used today for wood products in contact with the ground.
  • the creosote oil has the further advantage that it improves the mechanical resistance of the wood.
  • the invention relates to a method for treatment of creosote impregnated wood to substantially reduce or avoid bleeding, the wood being treated with air at a pressure above atmospheric before impregnation, and the method has been provided with the charactcris features defined in claim 1.
  • the method of the invention for treatment of creosote impregnated wood means in principle that the wood is subjected to a heat treatment under simultaneous applying of a vacuum after the creosote impregnated wood has been stored for a certain period, which preferably covers at least 3 months, or until the initial air pressure mentioned above has been balanced.
  • the heat treatment means that the wood is cooked with water as heat medium.
  • the treatment of the creosote impregnated wood is carried out in an autoclave provided with a vacuum pump and internally with steam coils or the like.
  • 25 1 water per m wood are added to the autoclave, after which the temperature in the autoclave is raised to the boiling point of the water at the same time as a vacuum of 90% is applied, resulting in evaporation of the water.
  • the operating conditions in the autoclave are preferably adjusted so that a maximum temperature and vacuum have appeared after about 0.25 to 0.50 h.
  • the negative pressure or the size of the vacuum is not critical and depends on such factors as the size of the autoclave, the wood to be treated etc.
  • a vaccum of 70 - 90% is used, i.e. a vaccum to the order of 700 - 900 mbar.
  • the vacuum is obtained by means of a conventional vacuum pump optionally connected to an ejector.
  • the creosote impregnated wood is subjected to said heat and vacuum treatment for up to 4 hours calculated from the start of applying the vacuum.
  • the length of the treatment time is not critical to the invention as long as the intended effect is obtained, i.e. bleeding is avioded.
  • a treatment time of up to 4 hours is used.
  • the treated, creosote impregnated wood was stored on trial for one month and no bleeding could be observed.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur (AREA)
  • Earth Drilling (AREA)
  • Distillation Of Fermentation Liquor, Processing Of Alcohols, Vinegar And Beer (AREA)
EP84850383A 1983-12-19 1984-12-10 Méthode de traitement de bois imprégné à la créosote pour réduire considérablement ou éviter le ressuage Expired EP0148141B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84850383T ATE27784T1 (de) 1983-12-19 1984-12-10 Methode zur behandlung von mit kreosot impraegniertem holz zur wesentlichen reduzierung oder vermeidung des ausschwitzens.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8307022 1983-12-19
SE8307022A SE8307022L (sv) 1983-12-19 1983-12-19 Forfarande for behandling av kreosotimpregnerat virke for att vesentligt minska eller undvika blodning

Publications (2)

Publication Number Publication Date
EP0148141A1 true EP0148141A1 (fr) 1985-07-10
EP0148141B1 EP0148141B1 (fr) 1987-06-16

Family

ID=20353796

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84850383A Expired EP0148141B1 (fr) 1983-12-19 1984-12-10 Méthode de traitement de bois imprégné à la créosote pour réduire considérablement ou éviter le ressuage

Country Status (6)

Country Link
EP (1) EP0148141B1 (fr)
AT (1) ATE27784T1 (fr)
DE (1) DE3464218D1 (fr)
FI (1) FI844821L (fr)
NO (1) NO844872L (fr)
SE (1) SE8307022L (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE347349C (de) * 1913-05-09 1922-01-19 Huelsberg & Cie M B H Verfahren zum Impraegnieren von Buchenholz
FR808624A (fr) * 1935-07-19 1937-02-11 Traitement des bois après imprégnation
GB687113A (en) * 1950-06-09 1953-02-04 Monie Sanders Hudson Method of removing excess impregnant from impregnated wood
DE1642199A1 (de) * 1966-11-08 1971-06-09 Ruetgerswerke Ag Verfahren zur Verbesserung der Oberflaechenbeschaffenheit von mit Teeroel nach den Kesseldruckverfahren impraegnierten Hoelzern
DE1947053B2 (de) * 1968-10-09 1973-01-25 Kesseldruckverfahren zum impraegnieren von feuchtem holz
AT354062B (de) * 1975-11-28 1979-12-27 Hager Ab Verfahren zur behandlung von holz

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE347349C (de) * 1913-05-09 1922-01-19 Huelsberg & Cie M B H Verfahren zum Impraegnieren von Buchenholz
FR808624A (fr) * 1935-07-19 1937-02-11 Traitement des bois après imprégnation
GB687113A (en) * 1950-06-09 1953-02-04 Monie Sanders Hudson Method of removing excess impregnant from impregnated wood
DE1642199A1 (de) * 1966-11-08 1971-06-09 Ruetgerswerke Ag Verfahren zur Verbesserung der Oberflaechenbeschaffenheit von mit Teeroel nach den Kesseldruckverfahren impraegnierten Hoelzern
DE1947053B2 (de) * 1968-10-09 1973-01-25 Kesseldruckverfahren zum impraegnieren von feuchtem holz
AT354062B (de) * 1975-11-28 1979-12-27 Hager Ab Verfahren zur behandlung von holz

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
L. VORREITER "Holztechnologisches Handbuch", Band I: Allgemeines, Holzkunde, Holzschutz und Holzvergütung, 1949 VERLAG GEORG FROMME & CO, Wien pages 425-427*Page 425, line 39 - page 427, line 2 * *

Also Published As

Publication number Publication date
EP0148141B1 (fr) 1987-06-16
DE3464218D1 (en) 1987-07-23
FI844821A0 (fi) 1984-12-05
FI844821L (fi) 1985-06-20
ATE27784T1 (de) 1987-07-15
SE8307022D0 (sv) 1983-12-19
NO844872L (no) 1985-06-20
SE8307022L (sv) 1985-06-20

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