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1. 发明授权

EP1230153B1 A METHOD FOR MANUFACTURING OF SILICA SOLS 有权
标题翻译：用于生产二氧化硅SOLEN
公开(公告)号：EP1230153B1
公开(公告)日：2004-08-04
申请号：EP00978157.6
申请日：2000-10-31
申请人： Akzo Nobel N.V. , Eka Chemicals AB
发明人： LINSTEN, Magnus, Olof , TOKARZ, Bozena, Stanislawa , LARSSON, Kenneth, Olof
IPC分类号： C01B33/148
CPC分类号： C01B33/1485
摘要： The invention relates to a method for production of high purity silica sols comprising the steps: (a) adding a phosphonic acid-based complexing agent to the silicic acid-containing solution forming complexes with metal cations present in said solution; (b) forming in said silicic acid-containing solution a precipitation containing phosphonic acid-based complexing agent and metal cations; (c) removing the precipitation from the solution; and, (d) polymerising the silicic acid in the solution to obtain a silica sol. The invention also relates to silica sols containing at least one phosphonic acid-based complexing agent.

2. 发明授权

EP1242308B1 SILICA-BASED SOLS 有权
标题翻译： SOLE基于二氧化硅
公开(公告)号：EP1242308B1
公开(公告)日：2005-11-16
申请号：EP00986107.1
申请日：2000-11-29
申请人： Akzo Nobel N.V. , Eka Chemicals AB
发明人： GREENWOOD, Peter , LINSTEN, Magnus, Olof , JOHANSSON-VESTIN, Hans
IPC分类号： C01B33/149 , D21H21/10 , D21H17/68 , D21H23/14 , C02F1/52
CPC分类号： C02F1/56 , B01J13/0034 , B01J13/0039 , C01B33/149 , C02F1/545 , C02F2103/28 , D21H17/68 , D21H21/10
摘要： The invention relates to 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 fibres, 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.

3. 发明公开

EP1242308A1 SILICA-BASED SOLS 有权
标题翻译：硅胶基SOLS
公开(公告)号：EP1242308A1
公开(公告)日：2002-09-25
申请号：EP00986107.1
申请日：2000-11-29
申请人： Akzo Nobel N.V. , Eka Chemicals AB
发明人： GREENWOOD, Peter , LINSTEN, Magnus, Olof , JOHANSSON-VESTIN, Hans
IPC分类号： C01B33/149 , D21H21/10 , D21H17/68 , D21H23/14 , C02F1/52
CPC分类号： C02F1/56 , B01J13/0034 , B01J13/0039 , C01B33/149 , C02F1/545 , C02F2103/28 , D21H17/68 , D21H21/10
摘要： The invention relates to 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 fibres, 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：本发明涉及包含含氮有机化合物和二氧化硅基颗粒的含水二氧化硅基溶胶，其比表面积至少为300平方米/克二氧化硅。本发明还涉及包含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，所述二氧化硅基颗粒的比表面积为每克二氧化硅至少300平方米。本发明还涉及包含含氮有机化合物和比表面积为至少300平方米/克二氧化硅的二氧化硅基颗粒的含水二氧化硅基溶胶在制备纸浆中作为絮凝剂的用途和纸张和水净化。本发明进一步涉及由含有纤维素纤维和任选填料的含水悬浮液生产纸的方法，其包括向悬浮液中加入（i）包含有机含氮化合物的含水二氧化硅基溶胶和（ii）至少一种带电的有机聚合物，在金属丝上形成并排出悬浮液。

4. 发明公开

EP1230153A1 A METHOD FOR MANUFACTURING OF SILICA SOLS 有权
标题翻译：用于生产二氧化硅SOLEN
公开(公告)号：EP1230153A1
公开(公告)日：2002-08-14
申请号：EP00978157.6
申请日：2000-10-31
申请人： Akzo Nobel N.V. , Eka Chemicals AB
发明人： LINSTEN, Magnus, Olof , TOKARZ, Bozena, Stanislawa , LARSSON, Kenneth, Olof
IPC分类号： C01B33/148
CPC分类号： C01B33/1485
摘要： The invention relates to a method for production of high purity silica sols comprising the steps: (a) adding a phosphonic acid-based complexing agent to the silicic acid-containing solution forming complexes with metal cations present in said solution; (b) forming in said silicic acid-containing solution a precipitation containing phosphonic acid-based complexing agent and metal cations; (c) removing the precipitation from the solution; and, (d) polymerising the silicic acid in the solution to obtain a silica sol. The invention also relates to silica sols containing at least one phosphonic acid-based complexing agent.

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