METHOD FOR THE MODIFICATION OF WOOD

摘要

The invention is directed to a process for the continuous acetylation of wood elements. The process particularly combines a batchwise impregnation step, with a continuous reaction step. In order to realize this, a collection step is built-in, so as to allow batches of impregnated wood elements to be fed into a reactor in a continuous manner. Very high acetylation contents can be obtained, at a level that had not been achievable before in a continuous and non-catalyzed acetylation process.

主权项

1. A process for the acetylation of wood elements comprising the following steps:
(a) impregnating a plurality of batches of wood elements with an acetylation fluid comprising acetic anhydride and/or acetic acid so as to provide a plurality of batches of impregnated wood elements; (b) collecting said plurality of batches of impregnated wood elements in such a manner as to provide a continuous feed of impregnated wood elements to a Reaction Chamber; (c) subjecting a continuous flow of impregnated wood elements to acetylation reaction conditions in said Reaction Chamber so as to provide a continuous flow of acetylated wood elements exiting said Reaction Chamber.