| 摘要 |
<p>OF THE DISCLOSURE A process for the delignification of lignocellulosic material wherein the lignocellulosic material is cooked with an alkaline pulping liquor containing 0.001 to 10% by weight of a hydroquinone selected from the group consisting of 9,10-anthra-hydroquinone, phenanthrahydroquinone, the alkyl-, alkoxy-, hydroxy-, amino-, halo- or carboxy-derivatives of said hydroquinones and the tautomeric forms of said hydroquinones and mixtures thereof.</p> |
