Novel method for preparing precipitated silicas, novel precipitated silicas and uses thereof, particularly for the reinforcement of polymers

• Main Authors: BOIVIN CEDRIC, GUY LAURENT, PERIN ERIC, LAMIRI KILANI
• Format: Patent
• Language: Chinese; English
• Published: 26.10.2016
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; COMPOUNDS THEREOF; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS

The invention relates to a novel method for preparing a precipitated silica, consisting in: reacting a silicate with an acidifying agent, such as to obtain a suspension of precipitated silica; filtering the suspension of precipitated silica, such as to obtain a filter cake; subjecting the filter cake to a disintegration operation; and, after the disintegration operation, performing a drying step, characterised in that at least one polycarboxylic acid is added to the filter cake either during or after the disintegration step. The invention also relates to novel precipitated silicas and to the uses thereof. 本发明涉及种用于制备沉淀二氧化硅的新颖的方法，在于：使硅酸盐与酸化剂反应，以便获得沉淀二氧化硅的悬浮液；将该沉淀二氧化硅的悬浮液过滤，以便获得滤饼；使该滤饼经受液化操作；并且，在该液化操作之后，进行干燥步骤，其特征在于在该液化步骤期间或之后将至少种多元羧酸添加到该滤饼中。本发明还涉及新颖的沉淀二氧化硅及其用途。