| 摘要 |
<p>Process for the manufacture of semi-bleached kraft cellulose pulp by delignification and bleaching in which, after the alkaline digestion, the kraft cellulose pulp is acid washed, then delignified under alkaline conditions, followed by a peroxide bleaching. In this way, semi-bleached cellulose pulps are obtained which according to the current state of the art are only capable of being manufactured by the use of chlorine or chlorine-containing compounds.</p> |
