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1. (WO2015121330) PROCESS FOR THE PREPARATION OF PRECIPITATED SILICA, PRECIPITATED SILICA AND ITS USES, IN PARTICULAR FOR THE REINFORCEMENT OF POLYMERS

Pub. No.:    WO/2015/121330    International Application No.:    PCT/EP2015/052917
Publication Date: Fri Aug 21 01:59:59 CEST 2015 International Filing Date: Fri Feb 13 00:59:59 CET 2015
IPC: C01B 33/193
C04B 14/04
C08K 3/36
C09C 1/28
Applicants: RHODIA OPERATIONS
Inventors: BOIVIN, Cédric
GUY, Laurent
PERIN, Eric
LAMIRI, Kilani
Title: PROCESS FOR THE PREPARATION OF PRECIPITATED SILICA, PRECIPITATED SILICA AND ITS USES, IN PARTICULAR FOR THE REINFORCEMENT OF POLYMERS
Abstract:
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 optionally in the presence of an alunniniunn compound; wherein 2-methylglutaric acid is added to the filter cake, during or after the liquefaction operation. It also relates to a novel precipitated silica and to its uses.