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Method for preparing precipitated silicas, novel precipitated silicas and uses thereof, particularly for the reinforcement of polymers
Method for preparing precipitated silicas, novel precipitated silicas and uses thereof, particularly for the reinforcement of polymers
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机译:制备沉淀的二氧化硅的方法,新型沉淀的二氧化硅及其用途,特别是对于聚合物的增强物
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摘要
The invention relates to a process for preparing a precipitated silica, to precipitated silicas, and to uses thereof. The process of the invention generally includes reacting a silicate with an acidifying agent, so as to obtain a suspension of precipitated silica; filtering the precipitated silica to obtain a filter cake; subjecting the filter cake to a liquefaction operation to form a second filter cake; and drying the second filter cake. In the process of the invention, at least one polycarboxylic acid is added to the filter cake, during or after the liquefaction operation.
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