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1.发明公开VERFAHREN ZUR OBERFLÄCHENBESCHICHTUNG VON ANORGANISCHEN PARTIKELN, INSBESONDERE TITANDIOXID-PIGMENTPARTIKELN 审中-公开方法无机粒子的表面涂装，尤其是二氧化钛颜料颗粒
公开(公告)号：EP3083838A1
公开(公告)日：2016-10-26
申请号：EP14828446.6
申请日：2014-12-11
CPC分类号： C09C1/3661 , C01P2004/84 , C09C1/3615 , C09C3/04 , C09C3/063
摘要： The invention relates to a method for the surface coating of particulate inorganic solids, more particularly of titanium dioxide pigment particles in an aqueous suspension. The untreated particles, especially TiO
2 bodies, are made into an aqueous suspension and then deagglomerated. The deagglomerated aqueous particle suspension (2) is conveyed according to the invention from a reservoir vessel (vessel) (1) in a circulating operation (3) (pumped in circulation). Located in the reservoir vessel is a high-power agitator (4). The high-power agitator has a minimum peripheral speed of 15 m/s or a specific stirring power P/V of at least 30 W/m
3 . Installed in the circuit (3) also is a flow-traversed mixer (e.g. in-line disperser) (5) based on the rotor-stator principle. The water-soluble precursor compounds of the coating substances (6) and the pH control substances (7), if required, are metered into the flow-traversed mixer. Compared to its prior-art counterparts, the method of the invention, applied to titanium dioxide particles, leads to smoother surface coatings (lower BET specific surface area) with improved density (low sulphuric acid solubility). Moreover, less coating material is separately precipitated (improved gloss).摘要翻译： 本发明涉及一种用于在wässrige无机固体粒子的表面涂布在悬浮液中的方法。 未处理的颗粒，特别是二氧化钛基体材料，在wässrige悬浮液制成并随后disagglomerated。 。根据本发明，未经处理的颗粒的悬浮液disagglomerated被馈送（再循环）从在循环过程中间容器（容器）。 中间容器包含具有优选为15米/秒的最小圆周速度，或至少30 W / m 3的特定的搅拌器容量P / V高速搅拌器。 基于转子/定子原理的管道混合器（例如直插式分散）更进一步地安装在所述电路。 涂层物质的水溶性前体化合物，和同样的任何必要pH控制物质，计量入管道混合器。 这导致表面具有更大的平滑度（低比表面积gemäß到BET），改进的密度（低硫酸溶解度），并且单独沉淀少涂层物质（改进的光泽度）的涂层。
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公开(公告)号：EP3083838B1
公开(公告)日：2019-05-01
申请号：EP14828446.6
申请日：2014-12-11
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