Process for post-treatment of preservative-treated wood

Details Process for post-treatment of preservative-treated wood Process for post-treatment of preservative-treated wood

B - Operations, Transporting

27

K

B27K 3/02 (2006.01) B05D 3/04 (2006.01) B27K 5/04 (2006.01)

Patent

CA 2048494

Title: AN IMPROVED PROCESS FOR POST-TREATMENT OF PRE- SERVATIVE-TREATED WOOD Abstract of the Disclosure An improved process for post-treatment of oil-borne preservative treated wood is described. More particularly, the improved process comprises, in one embodiment, the steps of (A) contacting the preservative-impregnated wood in a closed vessel with steam and collecting a water condensate generated in the vessel; (B) applying a vacuum which is sufficient to allow refluxing of the water condensate to remove at least some surface deposits and distillation of the water out of the vessel; (C) releasing the vacuum; (D) recovering the post-treated wood from the vessel. The invention uses a method of steam-cleaning that requires less time, less water and lower temperatures, and the method results in a simulta- neous separation of the steam condensate from the oil-preservative solution.

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