公开(公告)号：US06503369B2

公开(公告)日：2003-01-07

申请号：US09969616

申请日：2001-10-03

申请人： Pasi P. Rousu ,  Päivi P. Rousu ,  Esa J. Rousu

发明人： Pasi P. Rousu ,  Päivi P. Rousu ,  Esa J. Rousu

IPC分类号： D21C1100

CPC分类号： D21C11/0028 ,  C05D1/00 ,  D21C9/1063 ,  D21C11/0007

摘要： The invention relates to a process for producing cellulose and a fertilizer by-product by using a closed cycle of cooking chemicals and process waters. In the process of the invention, the pulp is bleached by at least partly using potassium hydroxide as a bleaching chemical. Thus, a bleach concentrate rich in potassium is obtained from the bleach filtrate, which bleach concentrate is combined with ashes obtained from the burning of lignin and other organic matter recovered from pulp production as a by-product, in order to be used as a potash fertilizer. The bleach-concentrate can also be used as a potash fertilizer as such. The invention also relates to a potash fertilizer obtained this way.

摘要翻译： 本发明涉及通过使用烹饪化学品和处理水的封闭循环来生产纤维素和副产物的方法。 在本发明的方法中，纸浆通过至少部分地使用氢氧化钾作为漂白化学品漂白。 因此，从漂白滤液中获得富含钾的漂白浓缩物，漂白浓缩物与作为副产物从纸浆生产回收的木质素和其它有机物质的燃烧中获得的灰分相结合，以便用作钾盐 肥料。 漂白剂也可以作为钾肥使用。 本发明还涉及以这种方式获得的钾肥。