Patent ID: 7754284
Filing Date: 2010-07-13
Classification: B27K

Abstract:
1. A method of treating lignocellulosic material, the method comprising: providing a heat-treatment chamber that is adapted only for one or both of atmospheric drying and atmospheric heat treating, the heat-treatment chamber being adapted for circulation of air and gases within the heat-treatment chamber and for extraction of gases and moisture from the heat-treatment chamber; placing lignocellulosic material in the heat-treatment chamber; and treating the lignocellulosic material in only the heat-treatment chamber by exposing the lignocellulosic material to an aqueous vapor containing a water-soluble preservative while simultaneously drying the lignocellulosic material by heating the lignocellulosic material in the chamber and extracting moisture and gases from the heat-treatment chamber, wherein the treating and drying is performed entirely at atmospheric pressure.