Invention Grant
- Patent Title: Method for preparing precipitated silicas, novel precipitated silicas, and uses thereof, particularly for polymer reinforcement
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Application No.: US15122088Application Date: 2015-02-26
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Publication No.: US11104583B2Publication Date: 2021-08-31
- 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: FR1400512 20140228
- International Application: PCT/EP2015/053993 WO 20150226
- International Announcement: WO2015/128405 WO 20150903
- Main IPC: C01B33/193
- IPC: C01B33/193 ; C08K3/36 ; C09C1/30 ; B60C1/00 ; C08L9/06 ; C01B33/12 ; C08J3/20 ; C08K5/092 ; C08K5/1539

Abstract:
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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Information query
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