| 摘要 |
The present invention relates to a process for the delignification of lignocellulose material, preferably wooden material, for the production of paper pulp. An additive in the state of an aqueous solution of phenols and pyrazolidones is added to the cooking liquor. The aqueous solution is alkaline or acidic and is a residual product from the developing of photographic film or photographic paper. |
