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：US11084729B2

公开(公告)日：2021-08-10

申请号：US15122098

申请日：2015-02-26

Applicant: RHODIA OPERATIONS

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

IPC: C01B33/193 ,  C09C1/30 ,  B60C1/00 ,  C08K3/36

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.

公开(公告)号：US10577476B2

公开(公告)日：2020-03-03

申请号：US14424353

申请日：2013-09-02

Applicant: RHODIA OPERATIONS

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

IPC: C08K3/36 ,  C01B33/193 ,  C08K3/22 ,  C08K5/092 ,  C08K5/548 ,  C08L9/06 ,  C09C1/30 ,  C08K5/1539

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 mixture of polycarboxylic acids is added to the filtration cake, during or after the liquefaction operation. It also relates to novel precipitated silicas and to their uses.

公开(公告)号：US11168204B2

公开(公告)日：2021-11-09

申请号：US15118695

申请日：2015-02-12

Applicant: RHODIA OPERATIONS

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

IPC: C09C3/08 ,  C08L9/06 ,  C01B33/193 ,  C08K3/36 ,  C09C1/30

Abstract: The invention relates to a novel process for preparing 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 filter cake,
said filter cake is subjected to a liquefaction operation comprising the addition of an aluminum compound,
after the liquefaction operation, a drying step is performed, characterized in that at least one polycarboxylic acid is added to the filter cake, during or after the liquefaction operation. The invention also relates to novel precipitated silicas and to uses thereof.

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：US09862810B2

公开(公告)日：2018-01-09

申请号：US14424368

申请日：2013-09-02

Applicant: RHODIA OPERATIONS

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

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

CPC classification number: C08K5/092 ,  C01B33/128 ,  C01B33/193 ,  C01P2004/61 ,  C01P2006/12 ,  C01P2006/16 ,  C08K3/22 ,  C08K3/36 ,  C08K2003/2227

Abstract: The present disclosure relates to a novel process for the preparation of a precipitated silica, in which: a silicate is reacted with at least one 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 methylglutaric acid is added to the filtration cake, during or after the liquefaction operation. It also relates to novel precipitated silicas and to their uses.

公开(公告)号：US20150247022A1

公开(公告)日：2015-09-03

申请号：US14424368

申请日：2013-09-02

Applicant: RHODIA OPERATIONS

Inventor： Cèdric Boivin ,  Laurent Guy ,  Eric Perin ,  Kilani Lamira

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

CPC classification number: C08K5/092 ,  C01B33/128 ,  C01B33/193 ,  C01P2004/61 ,  C01P2006/12 ,  C01P2006/16 ,  C08K3/22 ,  C08K3/36 ,  C08K2003/2227

Abstract: The invention relates to a novel process for the preparation of a precipitated silica, in which: a silicate is reacted with at least one 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 methylglutaric acid is added to the filtration cake, during or after the liquefaction operation. It also relates to novel precipitated silicas and to their uses.

Abstract translation: 本发明涉及一种制备沉淀二氧化硅的新方法，其中：硅酸盐与至少一种酸化剂反应，以获得沉淀二氧化硅的悬浮液，将沉淀二氧化硅的悬浮液过滤，以便 获得滤饼，所述滤饼经过液化操作，包括加入铝化合物，在液化操作之后，进行干燥阶段，其特征在于，在过滤饼中或之后加入甲基戊二酸 液化操作。 它还涉及新型沉淀二氧化硅及其用途。

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

公开(公告)号：US10259715B2

公开(公告)日：2019-04-16

申请号：US15118716

申请日：2015-02-12

Applicant: RHODIA OPERATIONS

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

IPC: C01B33/193 ,  B29D30/00 ,  B60C1/00 ,  C08K3/36 ,  C08L9/06

Abstract: The invention relates to a novel process for preparing 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 filter cake, said filter cake is subjected to a liquefaction operation, after the liquefaction operation, a drying step is performed, characterized in that at least one polycarboxylic acid is added to the filter cake, during or after the liquefaction operation. The invention also relates to novel precipitated silicas and to uses thereof.