基本信息:
- 专利标题： RECYCLING WASTE CELLULOSIC MATERIAL
- 专利标题（中）：回收废物细胞材料
- 申请号：PCT/CA1992000088 申请日：1992-02-28
- 公开(公告)号：WO1992015751A1 公开(公告)日：1992-09-17
- 发明人： DOMTAR INC. , NGUYEN, Xuan, Truong
- 申请人： DOMTAR INC.
- 专利权人： DOMTAR INC.
- 当前专利权人： DOMTAR INC.
- 优先权： US663,397 19910301
- 主分类号： D21C05/02
- IPC分类号： D21C05/02
摘要：
Waste cellulosic material, for example corrugated paperboard is cooked in an aqueous alkaline cooking liquor (26) to produce a brownstock pulp having a kappa number lower than that of the waste material; combustion of organic materials (67) in the brownstock washing liquor provides heat energy which can be recovered (68) for use in the cooking process and residual inorganic chemicals of the liquor can be employed to prepare fresh cooking liquor (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).