| 摘要 |
<p>A process for acetylating lignocellulosic materials, especially solid wood, is described which comprises the following steps: (a) providing the solid wood in a treatment container, (b) impregnating the material with cold or warm acetic anhydride as acetylating medium, (c) leaving the impregnated wood in the acetic anhydride for further reaction, (d) draining the solid wood from excessive acetic anhydride, (e) applying a vacuum to remove non-reacted acetic anhydride and formed acetic acid, and (f) post-treating the acetylated solid wood with steam or water to remove remaining acetic anhydride and the byproduct acetic acid.</p> |
