Kyanization
As Kyanisierung a special refers to methods for wood preservatives , which in the early 19th century by the English inventor John Kyan was developed and patented in England 1,823th
It is a long-term immersion process in which up to three percent mercury (II) chloride solution (sublimate) is used as a wood preservative . It was used, for example , to treat wooden masts , railway sleepers , timber roof structures , fence posts (hag posts), hop poles and vine posts . In Germany, the process was used in certain areas of application, such as the treatment of stakes and hop poles, until the early 1970s. However, due to the toxicity of mercury and the difficulties encountered in recycling or disposing of waste wood , other methods are used today and have been banned since 1990.
Web links
- Technical rules for waste wood treatment. Office of the Tyrolean Provincial Government, Environmental Protection Department, May 2002, accessed on December 8, 2018 .
- Bavarian State Ministry for State Development and Environmental Issues (1999): Waste wood - processing and energetic recovery
Individual evidence
- ↑ a b Gunnar Kleist: Preventive chemical wood protection in: Johann Müller (Ed.): Wood protection in building construction. Basics - wood pests - prevention - control. Fraunhofer IRB Verlag, Stuttgart 2005, ISBN 3-8167-6647-1 , p. 240f.