Invention Grant
- Patent Title: Precipitated silica and process for its manufacture
-
Application No.: US16611157Application Date: 2018-05-03
-
Publication No.: US11884551B2Publication Date: 2024-01-30
- Inventor: Emmanuelle Allain Najman , Fabien Stocklouser , Pascaline Garbey , Caroline Fayolle , Sylvaine Neveu , Laurent Guy
- Applicant: RHODIA OPERATIONS
- Applicant Address: FR Paris
- Assignee: RHODIA OPERATIONS
- Current Assignee: RHODIA OPERATIONS
- Current Assignee Address: FR Lyons
- Agency: Osha Bergman Watanabe & Burton LLP
- Priority: EP 305510 2017.05.05
- International Application: PCT/EP2018/061302 2018.05.03
- International Announcement: WO2018/202752A 2018.11.08
- Date entered country: 2019-11-05
- Main IPC: C01B33/193
- IPC: C01B33/193 ; B01J21/08 ; B01J35/10 ; C08K3/36

Abstract:
A precipitated silica having a broad particle size distribution and large median particle size as well as its method of manufacture is provided. The precipitated silica has a CTAB surface area SCTAB in the range from 40 to 300 m2/g, a difference between BET surface area SBET and CTAB surface area SCTAB of at least 35 m2/g, a width of the particle size distribution Ld, measured by centrifugal sedimentation, of at least 1.5, an amount of aluminium WA1 in the range from 0.5 to 7.0 wt %, and a median particle size d50, measured by centrifugal sedimentation, such that for a given value of CTAB surface area SCTAB and amount of aluminium WAl, parameter A, defined by the following equation: A=|d50|+0.782×|SCTAB|−8.524×|WAl|.
Public/Granted literature
- US20200079654A1 PRECIPITATED SILICA AND PROCESS FOR ITS MANUFACTURE Public/Granted day:2020-03-12
Information query
IPC分类: