Abstract: The present invention relates to improved methods of treating wooden materials. By the method of the invention, the wooden material is subjected to vacuum, overpressure and increased temperature, and subjected to ultrasound. Ultrasound is applied while the wooden material is covered by a liquid at a suitable overpressure and at a suitable temperature for a suitable period of time.

Abstract: The present invention relates to improved methods of treating wooden materials. By the method of the invention, the wooden material is subjected to vacuum, overpressure and increased temperature, and subjected to ultrasound. Ultrasound is applied while the wooden material is covered by a liquid at a suitable overpressure and at a suitable temperature for a suitable period of time.

Abstract: The present invention relates methods for heat treatment of wood. The invention further relates to wood obtainable by the methods of the invention as well as the use of the method for preparing treated wood. The method comprises the step of pressurising said airtight tank (4) to a predefined pressure (P1) in order to establish a pressurised environment for said wood (6). The method comprises the step of placing said wood (6) in an airtight tank (4) and heating said wood (6) to a predefined temperature (T2, T3). The predefined pressure (P1) is kept so high that the water in the wood (6) cannot evaporate at the predefined temperature (T2, T3).

Abstract: The present invention relates methods for heat treatment of wood. The invention further relates to wood obtainable by the methods of the invention as well as the use of the method for preparing treated wood. The method comprises the step of pressurising said airtight tank (4) to a predefined pressure (P1) in order to establish a pressurised environment for said wood (6). The method comprises the step of placing said wood (6) in an airtight tank (4) and heating said wood (6) to a predefined temperature (T2, T3). The predefined pressure (P1) is kept so high that the water in the wood (6) cannot evaporate at the predefined temperature (T2, T3).

Abstract: A method for treating wood by a treatment liquid is put forward. The method comprising the steps of: providing a container to hold the wood and the treatment liquid, placing the wood m the container, providing a electrode in the container for subjecting the wood to radio-emission, and providing a specific volume of the treatment liquid Ln the container for at least partially covering the wood and to at feast partially covering the electrode below the surface of the treatment liquid. Further, the method comprises the steps of providing a first flow in the container of the treatment liquid towards and from the wood at feast partially covered by the treatment liquid for removing at least some of the treatment liquid at the wood, and subjecting the wood at teas! partially covered by the treatment liquid to an exposure by radio-emission from the electrode for Increasing the temperature of the wood.