公开(公告)号：US20110065812A1

公开(公告)日：2011-03-17

申请号：US12946274

申请日：2010-11-15

申请人： Johan NYANDER ,  Glenn MANKIN

发明人： Johan NYANDER ,  Glenn MANKIN

IPC分类号： B01F17/00

CPC分类号： C01B33/1435 ,  D21H17/68 ,  D21H21/10 ,  Y10S516/928

摘要： A process for producing an aqueous silica-based sol is disclosed wherein a cationic ion exchange resin having part of its ion exchange capacity in hydrogen form is contacted with an aqueous alkali metal silicate to form a slurry having a pH from 5.0 to 11.5 and/or having particle aggregation or microgel formation corresponding to a S value up to 45%; adjusting the pH using a material comprising an aluminum compound; and separating the resin from the slurry.Silica-based sols having an S value from 15 to 25%, mole ratio Si:Al from 20:1 to 50:1, mole ratio Si:X, where X=alkali metal, from 5:1 to 17:1, SiO2 content of at least 5% by weight and containing silica-based particles having a specific surface area of at least 300 m2/g, as well as the use of such silica-based sols in producing paper are disclosed.

摘要翻译： 公开了一种生产水性二氧化硅基溶胶的方法，其中具有氢形式的部分离子交换容量的阳离子交换树脂与碱金属硅酸盐水溶液接触以形成pH为5.0至11.5的浆料和/或 具有对应于高达45％的S值的颗粒聚集或微凝胶形成; 使用包含铝化合物的材料调节pH; 并从浆料中分离树脂。 二氧化硅溶胶的S值为15〜25％，摩尔比Si:Al为20:1〜50:1，摩尔比Si:X，其中X =碱金属为5:1〜17:1，SiO2 含有至少5重量％的含有比表面积至少为300m 2 / g的二氧化硅基颗粒以及这种二氧化硅基溶胶在生产纸中的用途。