公开(公告)号：US06379500B2

公开(公告)日：2002-04-30

申请号：US09741300

申请日：2000-12-19

申请人： Peter Greenwood ,  Magnus Olof Linsten ,  Hans E. Johansson-Vestin

发明人： Peter Greenwood ,  Magnus Olof Linsten ,  Hans E. Johansson-Vestin

IPC分类号： D21H1768

CPC分类号： C02F1/56 ,  B01J13/0034 ,  B01J13/0039 ,  C01B33/149 ,  C02F1/545 ,  C02F2103/28 ,  D21H17/68 ,  D21H21/10

摘要： An aqueous silica-based sol comprising a nitrogen-containing organic compound and silica-based particles with a specific surface area of at least 300 square meters per gram of silica. The invention further relates to a process for the production of an aqueous silica-based sol comprising a nitrogen-containing organic compound which comprises incorporating a nitrogen-containing organic compound into a silica-based sol containing silica-based particles with a specific surface area of at least 300 square meters per gram of silica. The invention also relates to the use of an aqueous silica-based sol comprising a nitrogen-containing organic compound and silica-based particles with a specific surface area of at least 300 square meters per gram of silica as a flocculating agent in the production of pulp and paper and in water purification. The invention further relates to a process for the production of paper from an aqueous suspension containing cellulosic fibers, and optional fillers, which comprises adding to the suspension (i) an aqueous silica-based sol comprising an organic nitrogen-containing compound and (ii) at least one charged organic polymer, forming and draining the suspension on a wire.

摘要翻译： 包含含氮有机化合物的水性二氧化硅基溶胶和比表面积至少为300平方米/克二氧化硅的二氧化硅基颗粒。 本发明还涉及含有含氮有机化合物的含水二氧化硅基溶胶的制备方法，该方法包括将含氮有机化合物掺入含二氧化硅基颗粒的二氧化硅基溶胶中，所述二氧化硅基溶胶的比表面积为 至少300平方米每克二氧化硅。 本发明还涉及包含含氮有机化合物的水性二氧化硅基溶胶和比表面积为至少300平方米/克二氧化硅作为絮凝剂的二氧化硅基颗粒在制备纸浆中的用途 纸和水净化。 本发明还涉及从含有纤维素纤维和任选的填料的水性悬浮液生产纸的方法，其包括将悬浮液（i）包含含有机含氮化合物的二氧化硅水溶胶和（ii） 至少一个带电的有机聚合物，在线上形成和排出悬浮液。