公开(公告)号：WO2008150230A1

公开(公告)日：2008-12-11

申请号：PCT/SE2008/050657

申请日：2008-06-04

Applicant: AKZO NOBEL N.V. ,  PERSSON, Michael ,  HANSSON, Freddie ,  PAL, Annika, Viola ,  LINDAHL, Lars ,  CARLÉN, Joakim

Inventor： PERSSON, Michael ,  HANSSON, Freddie ,  PAL, Annika, Viola ,  LINDAHL, Lars ,  CARLÉN, Joakim

IPC: C01B33/143 ,  C01B33/149 ,  D21H17/68

CPC classification number: D21H17/74 ,  C01B33/1435 ,  C01B33/149 ,  D21H17/375 ,  D21H17/42 ,  D21H17/44 ,  D21H17/68 ,  D21H21/10 ,  D21H23/04

Abstract: The invention relates to a sol containing silica-based particles having an axial ratio of at least about 10 and specific surface area of at least about 600 m2/g. The invention further relates to a sol containing silica-based particles having an axial ratio of at least about 10 and S-value up to about 25. The invention further relates to a sol containing silica-based particles having an axial ratio of at least about 10 and a specific surface area of at least about 400 m2/g, wherein the silica-based particles are surface-modified. The invention further relates to a sol containing silica-based particles having a viscosity of at least 50 cP and silica content of at least about 3 % by weight, wherein the silica-based particles have a specific surface area of at least about 400 m2/g. The invention further relates to a process for producing the aqueous silica-based sol according to the invention, a sol containing silica-based particles obtainable by the process, use of the sol containing silica- based particles as a flocculating agent. The invention further relates to a process for producing paper in which the sol containing silica-based particles is used as a drainage and retention aid..

Abstract translation: 本发明涉及含有至少约10的轴比和至少约600m 2 / g的比表面积的二氧化硅基颗粒的溶胶。 本发明还涉及一种含有轴比为至少约10和S值至多约25的二氧化硅基颗粒的溶胶。本发明还涉及一种含有至少约为（约）的轴比的二氧化硅基颗粒的溶胶 10，比表面积为至少约400m2 / g，其中二氧化硅基颗粒被表面改性。 本发明还涉及含有二氧化硅基颗粒的溶胶，所述颗粒具有至少50cP的粘度和至少约3重量％的二氧化硅含量，其中所述二氧化硅基颗粒的比表面积为至少约400m 2 / G。 本发明还涉及本发明的水性二氧化硅基溶胶的制造方法，含有二氧化硅系粒子的溶胶，该方法可以使用含有二氧化硅系粒子的溶胶作为絮凝剂。 本发明还涉及一种生产纸的方法，其中含有二氧化硅基颗粒的溶胶用作排水和助留剂。

公开(公告)号：WO2003056100A1

公开(公告)日：2003-07-10

申请号：PCT/SE2002/002443

申请日：2002-12-20

Applicant: AKZO NOBEL N.V. ,  EKA CHEMICALS AB ,  NYANDER, Johan ,  JOHANSSON-VESTIN, Hans ,  NORDIN, Jan ,  PAL, Annika, Viola

Inventor： NYANDER, Johan ,  JOHANSSON-VESTIN, Hans ,  NORDIN, Jan ,  PAL, Annika, Viola

IPC: D21H17/71

CPC classification number: D21H17/74 ,  D21H17/29 ,  D21H17/375 ,  D21H17/455 ,  D21H17/48 ,  D21H17/68 ,  D21H21/10

Abstract: The present invention refers to a process for the production of paper from a suspension containing cellulosic fibres, and optionally fillers, comprising adding to the suspension at least one cationic organic polymer and an aqueous silica-containing composition comprising an anionic naphthalene sulphonate formaldehyde condensate and anionic silica-based particles, the composition having a weight ratio of naphthalene sulphonate formaldehyde condensate to silica-based particles within the range of from 0.2:1 to 99:1, and containing naphthalene sulphonate formaldehyde condensate and silica-based particles in an amount of at least 0.01 % by weight, based on the total weight of the aqueous silica-containing composition, and with the proviso that the composition contains substantially no cellulose-reactive sizing agent. The invention also encompasses an aqueous silica-containing composition and a method for preparation of an aqueous silica-containing composition.

Abstract translation: 本发明涉及一种由含有纤维素纤维和任选的填料的悬浮液生产纸的方法，包括向悬浮液中加入至少一种阳离子有机聚合物和含二氧化硅的水性组合物，其中包含阴离子萘磺酸甲醛缩合物和阴离子 二氧化硅基颗粒，该组合物具有萘磺酸甲醛缩合物与二氧化硅基颗粒的重量比在0.2:1至99:1的范围内，并且含有萘磺酸甲醛缩合物和二氧化硅基颗粒的量为 至少0.01重量％，基于含水二氧化硅的组合物的总重量，条件是该组合物基本上不含纤维素反应性上浆剂。 本发明还包括含水二氧化硅的组合物和含水二氧化硅的组合物的制备方法。