Invention Grant
- Patent Title: Process for the preparation of precipitated silicas, precipitated silicas and their uses, in particular for the reinforcement of polymers
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Application No.: US15118683Application Date: 2015-02-12
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Publication No.: US11407881B2Publication Date: 2022-08-09
- Inventor: Cédric Boivin , Laurent Guy , Eric Perin , Kilani Lamiri
- Applicant: RHODIA OPERATIONS
- Applicant Address: FR Paris
- Assignee: RHODIA OPERATIONS
- Current Assignee: RHODIA OPERATIONS
- Current Assignee Address: FR Paris
- Agency: Osha Bergman Watanabe & Burton LLP
- Priority: EP14305195 20140214,EP14305483 20140402
- International Application: PCT/EP2015/052916 WO 20150212
- International Announcement: WO2015/121329 WO 20150820
- Main IPC: C08K3/36
- IPC: C08K3/36 ; C04B26/02 ; C09C1/30 ; C01B33/193 ; C04B14/06 ; C01B33/187 ; C04B111/60
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 aluminium compound; wherein at least one polycarboxylic 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.
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