| 摘要 |
The invention relates to a process for the extraction of wood, comprising the following steps: providing wood particles, at least a first class and a second class, stacking a fine layer consisting of the first class wood particles over a further layer consisting of the second class wood particles, and extracting the wood particles using a liquid extractant, in which the extractant flows from the top downwards, first through the fine layer and then through the further layer, in which the wood particles of the first class are finer than the wood particles of the second class, and thus the fine layer has a lower permeability than the further layer. |
| 主权项 |
1. A process for the extraction of wood, comprising:
providing wood particles including at least a first class and a second class, stacking a fine layer consisting of the first class wood particles on a further layer consisting of the second class wood particles, and extracting the wood particles using a fluid extractant in which the extractant flows from top downwards initially through the fine layer and subsequently through the further layer, wherein the wood particles of the first class are finer than the wood particles of the second class, and thus the fine layer has a lower permeability than the further layer. |
