公开(公告)号：US20150210826A1

公开(公告)日：2015-07-30

申请号：US14424385

申请日：2013-09-02

Applicant: RHODIA OPERATIONS

Inventor： Cédric Boivin ,  Laurent Guy ,  Eric Perin ,  Kilani Lamiri

IPC: C08K5/092 ,  C08K3/36 ,  C01B33/12

CPC classification number: C08K5/092 ,  C01B33/128 ,  C01B33/193 ,  C08K3/36 ,  C08K2003/2227

Abstract: The invention relates to a novel process for the preparation of a precipitated silica, in which: a silicate is reacted with an acidifying agent, so as to obtain a suspension of precipitated silica, said suspension of precipitated silica is filtered, so as to obtain a filtration cake, said filtration cake is subjected to a liquefaction operation comprising the addition of an aluminum compound, after the liquefaction operation, a drying stage is carried out, characterized in that a polycarboxylic acid chosen from dicarboxylic acids and tricarboxylic acids is added to the filtration cake after the addition of the aluminum compound. It also relates to novel precipitated silicas and to their uses.

Abstract translation: 本发明涉及一种制备沉淀二氧化硅的新方法，其中：将硅酸盐与酸化剂反应，以获得沉淀二氧化硅的悬浮液，将沉淀二氧化硅的悬浮液过滤，得到 滤饼，所述滤饼经过液化操作，包括加入铝化合物，在液化操作之后，进行干燥阶段，其特征在于将选自二羧酸和三羧酸的多元羧酸加入过滤 蛋糕加入铝化合物后。 它还涉及新型沉淀二氧化硅及其用途。