EP0199092A1 - Procédé de fixage accéléré de sels de préservation de bois contenant du chromate - Google Patents

Procédé de fixage accéléré de sels de préservation de bois contenant du chromate Download PDF

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Publication number
EP0199092A1
EP0199092A1 EP86103757A EP86103757A EP0199092A1 EP 0199092 A1 EP0199092 A1 EP 0199092A1 EP 86103757 A EP86103757 A EP 86103757A EP 86103757 A EP86103757 A EP 86103757A EP 0199092 A1 EP0199092 A1 EP 0199092A1
Authority
EP
European Patent Office
Prior art keywords
chromate
wood
fixation
woods
heat treatment
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.)
Withdrawn
Application number
EP86103757A
Other languages
German (de)
English (en)
Inventor
Richard Dr. Stanek
Hans-Norbert Marx
Wendelin Hettler
Claus Dr. Wagner
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.)
Dr Wolman GmbH
Original Assignee
Dr Wolman GmbH
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 Dr Wolman GmbH filed Critical Dr Wolman GmbH
Publication of EP0199092A1 publication Critical patent/EP0199092A1/fr
Withdrawn legal-status Critical Current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
    • B27K1/00—Damping wood
    • 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
    • B27K3/0207—Pretreatment of wood before impregnation
    • B27K3/0214—Drying
    • 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
    • B27K3/0292—Processes; Apparatus involving an additional treatment during or after impregnation for improving fixation
    • 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
    • B27K3/26—Compounds of iron, aluminium, or chromium
    • 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
    • B27K5/04—Combined bleaching or impregnating and drying of wood

Definitions

  • the invention relates to a method for preventing or reducing the possible washing out of water-soluble, fixing protective salts immediately after impregnation.
  • Spontaneous fixation is achieved in the outer wood area by exposure to superheated steam at 110 to 120 ° C for one hour.
  • Another disadvantage of this process is the reduction in the concentration of protective agent in the outer wood area compared to normal fixing woods. This phenomenon is caused by two factors. On the one hand, active substances are removed from the wood surface with the dripping condensate, on the other hand, the quickly developing fixing zone acts as an inhibiting layer, which prevents the supply of active substances from the wood interior to the surface.
  • the object of the present invention was therefore to avoid the serious disadvantages of the known superheated steam process.
  • the method according to the invention for the accelerated fixing of chromate-containing wood preservatives provides for a two-stage treatment of the freshly impregnated woods with different heat carriers according to the features of claim 1.
  • stage 1 the freshly impregnated wood stacks are warmed up until the temperature of the wood surface has risen to 60 to 100 ° C., preferably 80 to 95 ° C. Warming up can e.g. with hot air, hot exhaust gases, radiant heaters or IR lamps.
  • stage II the heated wood stacks are brought to about 1100C with superheated steam, which temperature is then also to be held for about 30 minutes, according to known experience.
  • the heat treatment can also be carried out in a conventional drying chamber, but a technically preferred solution is the use of a special fixing chamber that allows precise control of the two process phases.
  • the condensate formation either does not take place at all or only comparatively small residual amounts of 0.2 to 0.5 m 2 (that is 5 to 15 of the normally occurring amounts of condensate) are present in the impregnation vessel.
  • the analyzes of the amounts of active substance in the marginal zone ⁇ showed no significant differences to normal fixed, non-steamed comparison woods.
  • the surface temperature of the pine masts dropped continuously to 58-65 ° C and the inside wall of the boiler to 60 to 64 ° C. After 30 minutes, the hot air treatment was interrupted, the boiler door was closed and superheated steam at 120 ° C. was fed into the boiler via the ventilation valves. After a further 10 minutes, the probes signaled an increase in the surface temperature on the pine masts to approximately 110 ° C., which was then held for a further 30 minutes.

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)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
  • Waveguide Switches, Polarizers, And Phase Shifters (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
EP86103757A 1985-03-22 1986-03-19 Procédé de fixage accéléré de sels de préservation de bois contenant du chromate Withdrawn EP0199092A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853510364 DE3510364A1 (de) 1985-03-22 1985-03-22 Verfahren zur beschleunigten fixierung chromathaltiger holzschutzsalze
DE3510364 1985-03-22

Publications (1)

Publication Number Publication Date
EP0199092A1 true EP0199092A1 (fr) 1986-10-29

Family

ID=6265996

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86103757A Withdrawn EP0199092A1 (fr) 1985-03-22 1986-03-19 Procédé de fixage accéléré de sels de préservation de bois contenant du chromate

Country Status (6)

Country Link
US (1) US4716054A (fr)
EP (1) EP0199092A1 (fr)
DE (1) DE3510364A1 (fr)
DK (1) DK130786A (fr)
FI (1) FI860957A (fr)
NO (1) NO861118L (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990006840A1 (fr) * 1988-12-16 1990-06-28 Steen Ole Moldrup Procede et appareil pour chauffer du bois ou d'autres matieres sensibles a la deshydratation et a la chaleur
EP0386599A1 (fr) * 1989-03-07 1990-09-12 Bell Pole Co. Ltd. Procédé pour fixer des matériaux en bois après traitement sous pression avec des agents chrome/cuivre/arsenic
WO2007039590A1 (fr) * 2005-10-04 2007-04-12 Basf Se Procede pour produire des matieres a base de lignocellulose modifiees

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4927672A (en) * 1989-05-11 1990-05-22 Drinkard Developments Process for rapidly fixing wood preservatives to prevent and reduce environmental contamination
US5030483A (en) * 1989-05-11 1991-07-09 Drinkard Developments, A Delaware Partnership Process for accelerated fixing of heat-fixable wood preservatives
DE102005047363A1 (de) * 2005-10-04 2007-04-12 Basf Ag Formaldehydarmes Lignocellulosematerial und Verfahren zu dessen Herstellung

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE111323C (fr) *
US1016024A (en) * 1910-12-10 1912-01-30 Hubertusmuehle Mit Beschraenkter Haftung Process of preserving wood.
US2154433A (en) * 1938-04-29 1939-04-18 Du Pont Process for preserving wood
DE2902658A1 (de) * 1978-01-27 1979-08-02 Bror Olof Haeger Verfahren zum schutz von holz

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2235822A (en) * 1937-12-28 1941-03-25 Celcure Corp Process for impregnating wood
US3080212A (en) * 1961-12-12 1963-03-05 Koppers Co Inc Treatment of wood with hot chromated copper arsenate solutions
US4303705A (en) * 1977-09-27 1981-12-01 Kelso Jr William C Treatment of wood with water-borne preservatives
US4466998A (en) * 1982-06-16 1984-08-21 Koppers Company, Inc. Wood impregnation

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE111323C (fr) *
US1016024A (en) * 1910-12-10 1912-01-30 Hubertusmuehle Mit Beschraenkter Haftung Process of preserving wood.
US2154433A (en) * 1938-04-29 1939-04-18 Du Pont Process for preserving wood
DE2902658A1 (de) * 1978-01-27 1979-08-02 Bror Olof Haeger Verfahren zum schutz von holz

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990006840A1 (fr) * 1988-12-16 1990-06-28 Steen Ole Moldrup Procede et appareil pour chauffer du bois ou d'autres matieres sensibles a la deshydratation et a la chaleur
EP0386599A1 (fr) * 1989-03-07 1990-09-12 Bell Pole Co. Ltd. Procédé pour fixer des matériaux en bois après traitement sous pression avec des agents chrome/cuivre/arsenic
WO2007039590A1 (fr) * 2005-10-04 2007-04-12 Basf Se Procede pour produire des matieres a base de lignocellulose modifiees
AU2006298714B2 (en) * 2005-10-04 2011-08-11 Basf Se Production of modified lignocellulosic materials

Also Published As

Publication number Publication date
US4716054A (en) 1987-12-29
DK130786D0 (da) 1986-03-21
DE3510364A1 (de) 1986-09-25
NO861118L (no) 1986-09-23
FI860957A0 (fi) 1986-03-07
FI860957A (fi) 1986-09-23
DK130786A (da) 1986-09-23

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RIN1 Information on inventor provided before grant (corrected)

Inventor name: STANEK, RICHARD, DR.

Inventor name: HETTLER, WENDELIN

Inventor name: WAGNER, CLAUS, DR.

Inventor name: MARX, HANS-NORBERT