| 摘要 |
<p>Waste cellulosic material, for example corrugated paperboard is cooked in an aqueous alkaline cooking liquor (26) to pro- duce a brownstock pulp having a kappa number tower than that of the waste material; combustion of organic materials (67) in the brownstock washing liquor provides heat energy which can be recovered (6 8) for use in the cooking process and residual inor- ganic chemicals of the liquor can be employed to prepare fresh cooking liquo r (92); the recycled pulp (32) can be employed as the sole pulp component of brown paper products, or can be bleached (102) to provide a pulp for white paper products (104).</p> |
