公开(公告)号：US10894872B2

公开(公告)日：2021-01-19

申请号：US14424385

申请日：2013-09-02

Applicant: RHODIA OPERATIONS

Inventor： Cédric Boivin ,  Laurent Guy ,  Eric Perin ,  Kilani Lamiri

IPC: C08K3/36 ,  C08K5/092 ,  C01B33/193 ,  C01B33/12 ,  C08K3/22

Abstract: The invention relates to a novel process for the preparation of a precipitated silica, in which: a silicate is reacted with an acidifying agent, so as to obtain a suspension of precipitated silica, said suspension of precipitated silica is filtered, so as to obtain a filtration cake, said filtration cake is subjected to a liquefaction operation comprising the addition of an aluminum compound, after the liquefaction operation, a drying stage is carried out, characterized in that a polycarboxylic acid chosen from dicarboxylic acids and tricarboxylic acids is added to the filtration cake after the addition of the aluminum compound. It also relates to novel precipitated silicas and to their uses.

公开(公告)号：US20250162887A1

公开(公告)日：2025-05-22

申请号：US18723368

申请日：2022-12-21

Applicant: Rhodia Operations

Inventor： Cédric Feral-Martin ,  Emmanuelle Allain Najman ,  Pascaline Lauriol-Garbey ,  Thomas Chaussee ,  Laurent Guy

IPC: C01B33/193

Abstract: The present invention relates to precipitated silica having an improved dispersability and to a process for its manufacture. The invention further relates to the use of precipitated silica as reinforcing filler in polymeric compositions, preferably elastomeric compositions.

公开(公告)号：US20250051173A1

公开(公告)日：2025-02-13

申请号：US18723051

申请日：2022-12-21

Applicant: Rhodia Operations

Inventor： Cédric Feral-Martin ,  Emmanuelle Allain Najman ,  Pascaline Lauriol-Garbey ,  Thomas Chaussee ,  Laurent Guy

IPC: C01B33/193 ,  B60C1/00 ,  C08K3/36 ,  C08L9/06

Abstract: The present invention relates to precipitated silica having small sized particles and to a process for its manufacture. The invention further relates to the use of precipitated silica as reinforcing filler in polymeric compositions, preferably elastomeric compositions.

公开(公告)号：US11958980B2

公开(公告)日：2024-04-16

申请号：US16772146

申请日：2018-12-20

Applicant: RHODIA OPERATIONS

Inventor： Emmanuelle Allain Najman ,  Pascaline Garbey ,  Cédric Feral-Martin ,  Laure Bertry ,  Laurent Guy ,  Thomas Chaussee ,  Stéphanie Croyeau

IPC: C09C1/30 ,  C08K3/36 ,  C08K9/04

CPC classification number: C09C1/3063 ,  C08K3/36 ,  C08K9/04 ,  C01P2006/12 ,  C08K2201/006

Abstract: A chemically modified precipitated silica characterised by the presence of alkyl moieties chemically bound to the silica and a process for its manufacture.

公开(公告)号：US11884551B2

公开(公告)日：2024-01-30

申请号：US16611157

申请日：2018-05-03

Applicant: RHODIA OPERATIONS

Inventor： Emmanuelle Allain Najman ,  Fabien Stocklouser ,  Pascaline Garbey ,  Caroline Fayolle ,  Sylvaine Neveu ,  Laurent Guy

IPC: C01B33/193 ,  B01J21/08 ,  B01J35/10 ,  C08K3/36

CPC classification number: C01B33/193 ,  B01J21/08 ,  B01J35/1014 ,  B01J35/1019 ,  C08K3/36 ,  C01P2002/54 ,  C01P2004/51 ,  C01P2006/12 ,  C01P2006/16 ,  C08K2201/005 ,  C08K2201/006

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|.

公开(公告)号：US11407881B2

公开(公告)日：2022-08-09

申请号：US15118683

申请日：2015-02-12

Applicant: RHODIA OPERATIONS

Inventor： Cédric Boivin ,  Laurent Guy ,  Eric Perin ,  Kilani Lamiri

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.

公开(公告)号：US20250059055A1

公开(公告)日：2025-02-20

申请号：US18723400

申请日：2022-12-21

Applicant: Rhodia Operations

Inventor： Cédric Feral-Martin ,  Emmanuelle Allain Najman ,  Pascaline Lauriol-Garbey ,  Thomas Chaussee ,  Laurent Guy

IPC: C01B33/193 ,  B60C1/00 ,  C08K3/36

Abstract: The present invention relates to precipitated silica having small sized particles and to a process for its manufacture. The invention further relates to the use of precipitated silica as reinforcing filler in polymeric compositions, preferably elastomeric compositions.

公开(公告)号：US11554963B2

公开(公告)日：2023-01-17

申请号：US16611163

申请日：2018-05-03

Applicant: RHODIA OPERATIONS

Inventor： Emmanuelle Allain Najman ,  Cédric Feral-Martin ,  Pascaline Garbey ,  Laurent Guy ,  Sylvaine Neveu ,  Caroline Fayolle

IPC: C01B33/193 ,  B01J21/08

Abstract: A precipitated silica characterised by the presence of specific acid sites on its surface and a process for its manufacture.

公开(公告)号：US11136462B2

公开(公告)日：2021-10-05

申请号：US15118674

申请日：2015-02-12

Applicant: RHODIA OPERATIONS

Inventor： Cédric Boivin ,  Laurent Guy ,  Eric Perin ,  Kilani Lamiri

IPC: C09C1/30 ,  C01B33/187 ,  C08L9/06 ,  C01B33/193 ,  C04B26/04 ,  C04B40/00 ,  C08K3/36 ,  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, in the absence of an aluminium compound; wherein a mixture of polycarboxylic acids is added to the filter cake, during or after the liquefaction operation. It also relates to novel precipitated silicas and to their uses.

公开(公告)号：US11104583B2

公开(公告)日：2021-08-31

申请号：US15122088

申请日：2015-02-26

Applicant: RHODIA OPERATIONS

Inventor： Cédric Boivin ,  Laurent Guy ,  Eric Perin ,  Kilani Lamiri

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