Process for the extraction of wood
US9434790B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 2, 2012 |
| Grant date | Sep 6, 2016 |
| Priority date | — |
| Expiry date | Feb 2, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D311/62
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.