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Process for the preparation of precipitated silicas, precipitated silicas and their uses, in particular for the reinforcement of polymers
Process for the preparation of precipitated silicas, precipitated silicas and their uses, in particular for the reinforcement of polymers
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机译:制备沉淀的二氧化硅的方法,沉淀的二氧化硅及其用途,特别是用于加强聚合物
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摘要
The invention relates to a process for the preparation of a novel precipitated silica, wherein: a silicate is reacted with an acidifying agent, so as to obtain a silica suspension; said silica suspension is filtered, so as to obtain a filter cake; said filter cake is subjected to a liquefaction operation, in the absence of an aluminium compound; wherein a mixture of polycarboxylic acids is added to the filter cake, during or after the liquefaction operation. It also relates to novel precipitated silicas and to their uses.
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