发明授权
- 专利标题： Production of precipitated silica
- 专利标题（中）： 沉淀二氧化硅的生产
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申请号： US12989160申请日： 2009-04-24
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公开(公告)号： US08454919B2公开(公告)日： 2013-06-04
- 发明人: Zied Soua , Cyril Boitelle
- 申请人： Zied Soua , Cyril Boitelle
- 申请人地址： FR Aubervilliers
- 专利权人： Rhodia Operations
- 当前专利权人： Rhodia Operations
- 当前专利权人地址： FR Aubervilliers
- 代理机构： SNR Denton US LLP
- 优先权： FR0852796 20080425
- 国际申请： PCT/FR2009/050767 WO 20090424
- 国际公布： WO2009/138678 WO 20091119
- 主分类号： C01B33/12
- IPC分类号： C01B33/12 ; B01D37/02 ; C02F1/00
摘要：
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.
公开/授权文献
- US20110176985A1 PRODUCTION OF PRECIPITATED SILICA 公开/授权日：2011-07-21
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