Invention Grant
- Patent Title: Production of precipitated silica
- Patent Title (中): 沉淀二氧化硅的生产
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Application No.: US12989160Application Date: 2009-04-24
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Publication No.: US08454919B2Publication Date: 2013-06-04
- Inventor: Zied Soua , Cyril Boitelle
- Applicant: Zied Soua , Cyril Boitelle
- Applicant Address: FR Aubervilliers
- Assignee: Rhodia Operations
- Current Assignee: Rhodia Operations
- Current Assignee Address: FR Aubervilliers
- Agency: SNR Denton US LLP
- Priority: FR0852796 20080425
- International Application: PCT/FR2009/050767 WO 20090424
- International Announcement: WO2009/138678 WO 20091119
- Main IPC: C01B33/12
- IPC: C01B33/12 ; B01D37/02 ; C02F1/00
Abstract:
Precipitated silica is produced by a process that includes a step for filtering and washing an aqueous suspension (S), comprising the following steps: (a) filtering a first portion (S1) of a precipitated silica suspension (S), whereby a cake (G1) is formed and said cake (G1) is then washed and a suspension (S′1) is formed by suspending the thereby obtained washed cake (G1), notably by dilution with water; (b) filtering a second portion (S2) of the suspension (S), whereby a cake (G2) is obtained; and (c) filtering said suspension (S′1) emanating from step (a) through the cake (G2) obtained at the end of step (b), employed as a filtration precoating layer.
Public/Granted literature
- US20110176985A1 PRODUCTION OF PRECIPITATED SILICA Public/Granted day:2011-07-21
Information query
